JOGLで4色グラデーションのポリゴンを描画する

JOGLで4色グラデーションのポリゴンを描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.*;

public class JoglSample61
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 60.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, 0.0f, -50.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );

                // X軸回転
                gl.glRotatef(50.0f, 1.0f, 0.0f, 0.0f);

                double rs = 15d;
                gl.glBegin(GL.GL_POLYGON);
                gl.glNormal3d(0, 1,0);
                // 赤色
                gl.glColor3f(1, 0, 0);
                gl.glVertex3d(-rs/2, 0.0, rs/2);
                // 緑色
                gl.glColor3f(0, 1, 0);
                gl.glVertex3d(-rs/2, 0.0, -rs/2);
                // 青色
                gl.glColor3f(0, 0, 1);
                gl.glVertex3d(rs/2, 0.0, -rs/2);
                // 黄色
                gl.glColor3f(1, 1, 0);
                gl.glVertex3d(rs/2, 0.0, rs/2);
                gl.glEnd();
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1381a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1381a.png)


動作環境
JOGL1.1.1a, JDK6 Update14

JOGLで複数の立方体を渦巻状に描画する

JOGLで複数の立方体を渦巻状に描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample60
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 60.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, 0.0f, -50.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );

                // 面の色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );

                // Y軸回転
                gl.glRotatef(30.0f, 0.0f, 1.0f, 0.0f);

                gl.glPushMatrix();
                float cs = 0.01f;
                for(int li=0;li<300;li++){
                    // Z軸回転
                    gl.glRotatef(12.0f, 0.0f, 0.0f, 1.0f);
                    // 移動
                    gl.glTranslatef(0.0f, cs*1.1f, 0.0f);
                    // 立方体を描画
                    glut.glutSolidCube(cs*=1.02);
                }
                gl.glPopMatrix();
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1218a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1218a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLで凹んだポリゴンを描画する

JOGLで凹んだポリゴンを描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.*;

public class JoglSample59
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLU glu = new GLU();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, 0.0f, -7.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );

                gl.glPushMatrix();
                // 面の色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );

                GLUtessellator tess = glu.gluNewTess();

                TessCB tcb = new TessCB(gl, glu);
                glu.gluTessCallback(tess, GLU.GLU_TESS_VERTEX, tcb);
                glu.gluTessCallback(tess, GLU.GLU_TESS_BEGIN, tcb);
                glu.gluTessCallback(tess, GLU.GLU_TESS_END, tcb);
                glu.gluTessCallback(tess, GLU.GLU_TESS_ERROR, tcb);

                double va[][] = {
                    {1.0, -1.0, 0.0,},
                    {1.0, 1.0, 0.0},
                    {-1.0, 1.0, 0.0},
                    {-1.0, -1.0, 0.0},
                    {0.0, -0.5, 0.0}
                };

                glu.gluTessBeginPolygon(tess, null);
                glu.gluTessBeginContour(tess);
                for(int al=0;al<va.length;al++){
                    glu.gluTessVertex(tess, va[al], 0, va[al]);
                }
                glu.gluTessEndContour(tess);
                glu.gluTessEndPolygon(tess);


                gl.glPopMatrix();
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}


            class TessCB extends 
                GLUtessellatorCallbackAdapter 
            {
                private GL gl = null;
                private GLU glu = null;

                public TessCB(GL gla, GLU glua)
                {
                    gl = gla;
                    glu = glua;
                }
                public void begin(int type)
                {
                    gl.glBegin(type);
                }

                public void end()
                {
                    gl.glEnd();
                }

                public void vertex(Object vertexData)
                {
                    if( vertexData instanceof double[] ){
                        gl.glVertex3dv(
                            (double[])vertexData, 0);
                    }
                }

                public void error(int errnum)
                {
                    System.out.println(
                        glu.gluErrorString(errnum));
                    System.exit(0);
                }
            }
            }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1217a.png"), width, height, true);
        context.release();
        context.destroy();
    }

}

出力画像(sample1217a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLで複数の球の文字列を描画する

JOGLで複数の球の文字列を描画するには、以下のコードを実行します。

import java.io.*;
import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample58
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(-6.0f, 1.0f, -35.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(GL.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);

                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );
                gl.glPushMatrix();
                // X軸回転
                gl.glRotatef(70.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(10.0f, 0.0f, 1.0f, 0.0f);

                // 面の色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );

                /* 文字列描画用イメージを作成 */
                String message = "JOGL";
                Font font = new Font(Font.SANS_SERIF, 
                    Font.PLAIN, 10);
                FontRenderContext frc = new FontRenderContext(
                    new AffineTransform(), false, false);
                TextLayout layout = new TextLayout(
                    message, font, frc);

                BufferedImage img = new BufferedImage(
                    (int)layout.getBounds().getWidth(), 
                    (int)layout.getAscent() + 
                    (int)layout.getDescent(), 
                    BufferedImage.TYPE_INT_ARGB);

                Graphics2D gr = img.createGraphics();
                gr.setColor(new Color(0x00, 0x00, 0x00, 0x00));
                gr.fill(new Rectangle2D.Double(0,0,
                    img.getWidth(),img.getHeight()));
                /* 文字列を描画 */
                gr.setColor(new Color(0xff, 0xff, 0xff));
                gr.setFont(font);
                layout.draw(gr, 0, 
                    img.getHeight()-layout.getDescent());
                gr.dispose();

                float rs = 0.25f;
                float ds = 0.45f;
                for(int lz=0;lz<img.getHeight();lz++){
                    for(int lx=0;lx<img.getWidth();lx++){
                        gl.glPushMatrix();
                        gl.glTranslatef(ds*lx, 0f, ds*lz);
                        if( img.getRGB(lx, lz) != 0 ){
                            glut.glutSolidSphere(rs, 16, 16);
                        }
                        gl.glPopMatrix();
                    }
                }

                gl.glPopMatrix();
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1216a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1216a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLで円柱がウニのように広がった画像を作成する

JOGLで円柱がウニのように広がった画像を作成するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample57
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0xf0/(float)0xf0, 
                    (float)0xf0/(float)0xf0, 
                    (float)0xf0/(float)0xf0,
                    1f);

            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, -1.0f, -30.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_AUTO_NORMAL);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );

                // 面の色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );
                // X軸回転
                gl.glRotatef(45.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(45.0f, 0.0f, 1.0f, 0.0f);

                int slices = 12;
                float ch = 5f;
                float cr = 0.25f;

                for(int lx=0;lx<slices;lx++){
                    for(int ly=0;ly<slices;ly++){
                        gl.glPushMatrix();
                        // X軸回転
                        gl.glRotatef(360f/slices*lx, 1.0f, 0.0f, 0.0f);
                        // Y軸回転
                        gl.glRotatef(360f/slices*ly, 0.0f, 1.0f, 0.0f);
                        // 円柱を描画
                        glut.glutSolidCylinder(cr, ch, 16, 4);
                        gl.glPopMatrix();
                    }
                }
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}

          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1215a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1215a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLでピラミッドを描画する

JOGLでピラミッドを描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample56
{
   // 出力画像サイズ
   private static int width = 300;
   private static int height = 300;

   public static void main(String args[])
       throws IOException
   {
       GLDrawableFactory gldf =
           GLDrawableFactory.getFactory();
       GLCapabilities glc = new GLCapabilities();
       glc.setDoubleBuffered(false);
       GLPbuffer buf = gldf.createGLPbuffer(
          glc, null, width, height, null);

       buf.addGLEventListener(
           new GLEventListener(){
           // 初期化
           public void init(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               // 背景色
               gl.glClearColor(
                   (float)0xf0/(float)0xf0,
                   (float)0xf0/(float)0xf0,
                   (float)0xf0/(float)0xf0,
                   1f);

           }

           public void display(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               gl.glViewport(0, 0, width, height);

               // 透視投影
               gl.glMatrixMode(GL.GL_PROJECTION);
               gl.glLoadIdentity();
               float ratio = (float)height/(float)width;
               gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                   5.0f, 40.0f);

               gl.glMatrixMode(GL.GL_MODELVIEW);
               gl.glLoadIdentity();
               gl.glTranslatef(0.0f, -1.0f, -12.0f);

               gl.glEnable(GL.GL_LIGHTING);
               gl.glEnable(GL.GL_LIGHT0);
               gl.glEnable(gl.GL_COLOR_MATERIAL);
               gl.glEnable(GL.GL_NORMALIZE);
               gl.glEnable(GL.GL_AUTO_NORMAL);
               gl.glEnable(GL.GL_DEPTH_TEST);
               gl.glEnable(GL.GL_CULL_FACE);
               gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );

               gl.glPushMatrix();
               // 面の色を設定
               gl.glColor3f(
                   (float)0x77/(float)0xff,
                   (float)0x99/(float)0xff,
                   (float)0xff/(float)0xff
               );
               // X軸回転
               gl.glRotatef(40.0f, 1.0f, 0.0f, 0.0f);
               // Y軸回転
               gl.glRotatef(20.0f, 0.0f, 1.0f, 0.0f);

               // ピラミッドサイズ
               double ph = 2.0;
               double ps = 3.0;

               drawTriangle(gl,
                 0.0, ph, 0.0,
                 ps/2.0, 0.0, -ps/2.0,
                 -ps/2.0, 0.0, -ps/2.0);

               drawTriangle(gl,
                 0.0, ph, 0.0,
                 -ps/2.0, 0.0, ps/2.0,
                 ps/2.0, 0.0, ps/2.0);

               drawTriangle(gl,
                 0.0, ph, 0.0,
                 -ps/2.0, 0.0, -ps/2.0,
                 -ps/2.0, 0.0, ps/2.0);

               drawTriangle(gl,
                 0.0, ph, 0.0,
                 ps/2.0, 0.0, ps/2.0,
                 ps/2.0, 0.0, -ps/2.0);

               gl.glBegin(GL.GL_POLYGON);
               gl.glNormal3d(0,-1,0);
               gl.glVertex3d(-ps/2, 0.0, ps/2);
               gl.glVertex3d(-ps/2, 0.0, -ps/2);
               gl.glVertex3d(ps/2, 0.0, -ps/2);
               gl.glVertex3d(ps/2, 0.0, ps/2);
               gl.glEnd();

               gl.glPopMatrix();
           }

           public void reshape(
               GLAutoDrawable dr,
               int x, int y,
               int width, int height){}

           public void displayChanged(
               GLAutoDrawable dr,
               boolean modeChanged,
               boolean deviceChanged){}

           private void drawTriangle(GL gl,
               double p1x, double p1y, double p1z,
               double p2x, double p2y, double p2z,
               double p3x, double p3y, double p3z)
           {
               gl.glBegin(GL.GL_POLYGON);

               gl.glNormal3d((p1x+p2x+p3x)/3,
                   1, (p1z+p2z+p3z)/3);
               gl.glVertex3d(p1x, p1y, p1z);
               gl.glNormal3d((p1x+p2x+p3x)/3,
                   0, (p1z+p2z+p3z)/3);
               gl.glVertex3d(p2x, p2y, p2z);
               gl.glNormal3d((p1x+p2x+p3x)/3,
                   0, (p1z+p2z+p3z)/3);
               gl.glVertex3d(p3x, p3y, p3z);

               gl.glEnd();
           }
         }
       );

       GLContext context =  buf.createContext(null);
       context.makeCurrent();
       buf.display();
       Screenshot.writeToFile(
           new File("sample1214a.png"), width, height, true);
       context.release();
       context.destroy();
   }
}

出力画像(sample1214a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLで複数の直方体の山を描画する

JOGLで複数の直方体の山を描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample55
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0x58/(float)0xff, 
                    (float)0x50/(float)0xff, 
                    (float)0x50/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
//                gl.glTranslatef(0.0f, -0.5f, -30.0f);
                gl.glTranslatef(-3.0f, -1.5f, -7.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(GL.GL_LIGHT1);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_AUTO_NORMAL);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);

                // フォグの設定
                float fog[]={0.2f,0.2f,0.3f,1.0f};
                gl.glFogfv(GL.GL_FOG_COLOR,fog,0);
                gl.glFogi(GL.GL_FOG_MODE,GL.GL_EXP);
                gl.glFogf(GL.GL_FOG_DENSITY, 0.04f);
                gl.glFogf(GL.GL_FOG_START, 0.0f);
                gl.glFogf(GL.GL_FOG_END,20.0f);
                gl.glEnable(GL.GL_FOG);

                // 光源の位置
                float l0pos[] = {-5.0f, 10.0f, 0.0f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, l0pos, 0);
                // 環境光
                float l0amb[] = {0.1f, 0.1f, 0.1f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_AMBIENT, l0amb, 0);
                // 拡散光
                float l0dif[] = {0.9f, 0.9f, 0.9f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_DIFFUSE, l0dif, 0);
                // 鏡面光
                float l0spe[] = {1.0f, 1.0f, 1.0f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPECULAR, l0spe, 0);

                gl.glClear(GL.GL_COLOR_BUFFER_BIT
                    |GL.GL_DEPTH_BUFFER_BIT );

                // 面の色を設定
                gl.glColor3f(
                    (float)0xf8/(float)0xff, 
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff
                );

                // X軸回転
                gl.glRotatef(15.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(35.0f, 0.0f, 1.0f, 0.0f);

                float cs = 0.25f;
                float gs = 0.3f;
                for(int lz=-10;lz<60;lz++){
                    for(int lx=-10;lx<100;lx++){
                        gl.glPushMatrix();
                        float de = (gs*lx-5)*(gs*lx-5)+(gs*lz-3)*(gs*lz-3)+9;
                        float ch = 27/(de==0f?0.001f:de);
                        gl.glScalef(1f,ch, 1f);
                        gl.glTranslatef(lx*gs, cs*ch/2, -1*lz*gs);
                        glut.glutSolidCube(cs);
                        gl.glPopMatrix();
                    }
                }
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1213a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1213a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLで複数の直方体をスプリング状に配置する

JOGLで複数の直方体をスプリング状に配置するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample54
{
   // 出力画像サイズ
   private static int width = 300;
   private static int height = 300;

   public static void main(String args[])
       throws IOException
   {
       GLDrawableFactory gldf =
           GLDrawableFactory.getFactory();
       GLCapabilities glc = new GLCapabilities();
       glc.setDoubleBuffered(false);
       GLPbuffer buf = gldf.createGLPbuffer(
          glc, null, width, height, null);

       buf.addGLEventListener(
           new GLEventListener(){
           // 初期化
           public void init(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               // 背景色
               gl.glClearColor(
                   (float)0xf0/(float)0xff,
                   (float)0xf0/(float)0xff,
                   (float)0xf0/(float)0xff,
                   1f);
           }

           public void display(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               GLUT glut = new GLUT();
               gl.glViewport(0, 0, width, height);

               // 透視投影
               gl.glMatrixMode(GL.GL_PROJECTION);
               gl.glLoadIdentity();
               float ratio = (float)height/(float)width;
               gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                   5.0f, 80.0f);

               gl.glMatrixMode(GL.GL_MODELVIEW);
               gl.glLoadIdentity();
               gl.glTranslatef(0.0f, -0.5f, -30.0f);

               gl.glEnable(GL.GL_LIGHTING);
               gl.glEnable(GL.GL_LIGHT0);
               gl.glEnable(gl.GL_COLOR_MATERIAL);
               gl.glEnable(GL.GL_NORMALIZE);
               gl.glEnable(GL.GL_AUTO_NORMAL);
               gl.glEnable(GL.GL_DEPTH_TEST);
               gl.glEnable(GL.GL_CULL_FACE);


               gl.glClear(GL.GL_COLOR_BUFFER_BIT
                   |GL.GL_DEPTH_BUFFER_BIT );

               // 面の色を設定
               gl.glColor3f(
                   (float)0x77/(float)0xff,
                   (float)0x99/(float)0xff,
                   (float)0xff/(float)0xff
               );

               // X軸回転
               gl.glRotatef(15.0f, 1.0f, 0.0f, 0.0f);
               // Y軸回転
               gl.glRotatef(70.0f, 0.0f, 1.0f, 0.0f);

               float cs = 0.5f;
               float gs = 0.05f;
               for(int lx=-100;lx<800;lx++){
                   gl.glPushMatrix();
                   gl.glRotatef(5f*lx, 1.0f, 0.0f, 0.0f);
                   gl.glTranslatef(gs*lx, 2f, 0f);
                   gl.glScalef(1f,1f,0.2f);
                   glut.glutSolidCube(cs);
                   gl.glPopMatrix();
               }
           }

           public void reshape(
               GLAutoDrawable dr,
               int x, int y,
               int width, int height){}

           public void displayChanged(
               GLAutoDrawable dr,
               boolean modeChanged,
               boolean deviceChanged){}
         }
       );

       GLContext context =  buf.createContext(null);
       context.makeCurrent();
       buf.display();
       Screenshot.writeToFile(
           new File("sample1212a.png"), width, height, true);
       context.release();
       context.destroy();
   }
}

出力画像(sample1212a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLでスポットライトを使用する

JOGLでスポットライトを使用するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample53
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0x58/(float)0xff, 
                    (float)0x50/(float)0xff, 
                    (float)0x50/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
//                gl.glTranslatef(0.0f, -0.5f, -30.0f);
                gl.glTranslatef(-3.0f, -1.5f, -7.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(GL.GL_LIGHT1);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_AUTO_NORMAL);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);


                // フォグの設定
                float fog[]={0.2f,0.2f,0.3f,1.0f};
                gl.glFogfv(GL.GL_FOG_COLOR,fog,0);
                gl.glFogi(GL.GL_FOG_MODE,GL.GL_EXP);
                gl.glFogf(GL.GL_FOG_DENSITY, 0.04f);
                gl.glFogf(GL.GL_FOG_START, 0.0f);
                gl.glFogf(GL.GL_FOG_END,20.0f);
                gl.glEnable(GL.GL_FOG);

                // 光源の位置
                float l0pos[] = {-5.0f, 5.0f, 0.0f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, l0pos, 0);
                // 環境光
                float l0amb[] = {0.1f, 0.1f, 0.1f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_AMBIENT, l0amb, 0);
                // 拡散光
                float l0dif[] = {0.2f, 0.2f, 0.2f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_DIFFUSE, l0dif, 0);
                // 鏡面光
                float l0spe[] = {0.3f, 0.3f, 0.3f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPECULAR, l0spe, 0);



                // 光源の位置
                float l1pos[] = {3.0f, 4.0f, -5.0f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT1, GL.GL_POSITION, l1pos, 0);
                // 環境光
                float l1amb[] = {0.2f, 0.2f, 0.1f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT1, GL.GL_AMBIENT, l1amb, 0);
                // 拡散光
                float l1dif[] = {0.5f, 0.5f, 0.3f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT1, GL.GL_DIFFUSE, l1dif, 0);
                // 鏡面光
                float l1spe[] = {0.8f, 0.8f, 0.2f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT1, GL.GL_SPECULAR, l1spe, 0);
                // スポットライト
                float l1dir[] = {0.1f, -1.0f, 0.0f};
                gl.glLightfv(GL.GL_LIGHT1, GL.GL_SPOT_DIRECTION, l1dir, 0);
                gl.glLightf(GL.GL_LIGHT1, GL.GL_SPOT_CUTOFF, 30.0f );
                gl.glLightf(GL.GL_LIGHT1, GL.GL_SPOT_EXPONENT, 5.0f );

                gl.glClear(GL.GL_COLOR_BUFFER_BIT
                    |GL.GL_DEPTH_BUFFER_BIT );

                // 面の色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );

                // X軸回転
                gl.glRotatef(15.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(35.0f, 0.0f, 1.0f, 0.0f);

                float cs = 0.4f;
                float gs = 0.5f;
                int xs = 100;
                int zs = 100;
                for(int lz=-3;lz<zs;lz++){
                    for(int lx=-3;lx<xs;lx++){
                        gl.glColor3f(
                          (float)0xff/(float)0xff, 
                          (float)0xff/(float)0xff, 
                          (float)0xff/(float)0xff
                        );
                        gl.glPushMatrix();
                        float ch = cs * (float)(Math.random()*1.0);
                        gl.glScalef(1f,ch, 1f);
                        gl.glTranslatef(lx*gs, -(cs-ch)/2, -1*lz*gs);
                        glut.glutSolidCube(cs);
                        gl.glPopMatrix();
                    }
                }
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1211a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1211a.png)

JOGLで球状に配置された立方体を描画する

JOGLで球状に配置された立方体を描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample52
{
   // 出力画像サイズ
   private static int width = 300;
   private static int height = 300;

   public static void main(String args[])
       throws IOException
   {
       GLDrawableFactory gldf =
           GLDrawableFactory.getFactory();
       GLCapabilities glc = new GLCapabilities();
       glc.setDoubleBuffered(false);
       GLPbuffer buf = gldf.createGLPbuffer(
          glc, null, width, height, null);

       buf.addGLEventListener(
           new GLEventListener(){
           // 初期化
           public void init(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               // 背景色
               gl.glClearColor(
                   (float)0xf0/(float)0xff,
                   (float)0xf0/(float)0xff,
                   (float)0xf0/(float)0xff,
                   1f);
           }

           public void display(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               GLUT glut = new GLUT();
               gl.glViewport(0, 0, width, height);

               // 透視投影
               gl.glMatrixMode(GL.GL_PROJECTION);
               gl.glLoadIdentity();
               float ratio = (float)height/(float)width;
               gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                   5.0f, 40.0f);

               gl.glMatrixMode(GL.GL_MODELVIEW);
               gl.glLoadIdentity();
               gl.glTranslatef(0.0f, 0.0f, -22.0f);

               gl.glEnable(GL.GL_LIGHTING);
               gl.glEnable(GL.GL_LIGHT0);
               gl.glEnable(gl.GL_COLOR_MATERIAL);
               gl.glEnable(GL.GL_NORMALIZE);
               gl.glEnable(GL.GL_AUTO_NORMAL);
               gl.glEnable(GL.GL_DEPTH_TEST);
               gl.glEnable(GL.GL_CULL_FACE);

               gl.glClear(GL.GL_COLOR_BUFFER_BIT
                   |GL.GL_DEPTH_BUFFER_BIT );

               // X軸回転
               gl.glRotatef(15.0f, 1.0f, 0.0f, 0.0f);
               // Y軸回転
               gl.glRotatef(30.0f, 0.0f, 1.0f, 0.0f);
               // Z軸回転
               gl.glRotatef(60.0f, 0.0f, 0.0f, 1.0f);

               int slices = 32;
               float rad = 3f;
               float cs = 0.25f;

               gl.glColor3f(
                   (float)0x77/(float)0xff,
                   (float)0x99/(float)0xff,
                   (float)0xff/(float)0xff
               );
               for(int ly=0;ly<slices;ly++){
                   for(int lz=0;lz<slices;lz++){
                       gl.glPushMatrix();
                       // Y軸回転
                       gl.glRotatef(360f/slices*ly, 0.0f, 1.0f, 0.0f);
                       // Z軸回転
                       gl.glRotatef(360f/slices*lz, 0.0f, 0.0f, 1.0f);
                       gl.glTranslatef(0f, rad, 0f);

                       glut.glutSolidCube(cs);
                       gl.glPopMatrix();
                   }
               }
           }

           public void reshape(
               GLAutoDrawable dr,
               int x, int y,
               int width, int height){}

           public void displayChanged(
               GLAutoDrawable dr,
               boolean modeChanged,
               boolean deviceChanged){}
         }
       );

       GLContext context =  buf.createContext(null);
       context.makeCurrent();
       buf.display();
       Screenshot.writeToFile(
           new File("sample1210a.png"), width, height, true);
       context.release();
       context.destroy();
   }
}

出力画像(sample1210a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLで複数の直方体を凸凹に配置する

JOGLで複数の直方体を凸凹に配置するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample51
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0x58/(float)0xff, 
                    (float)0x50/(float)0xff, 
                    (float)0x50/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(-3.0f, -1.5f, -7.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_AUTO_NORMAL);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);

                // フォグの設定
                float fog[]={0.1f,0.1f,0.2f,1.0f};
                gl.glFogfv(GL.GL_FOG_COLOR,fog,0);
                gl.glFogi(GL.GL_FOG_MODE,GL.GL_EXP);
                gl.glFogf(GL.GL_FOG_DENSITY, 0.08f);
                gl.glFogf(GL.GL_FOG_START, 0.0f);
                gl.glFogf(GL.GL_FOG_END,20.0f);
                gl.glEnable(GL.GL_FOG);

                // 光源の位置
                float l1pos[] = {-5.0f, 5.0f, 0.0f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, l1pos, 0);
                // 環境光
                float l1amb[] = {0.2f, 0.2f, 0.1f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_AMBIENT, l1amb, 0);
                // 拡散光
                float l1dif[] = {0.9f, 0.9f, 0.9f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_DIFFUSE, l1dif, 0);
                // 鏡面光
                float l1spe[] = {0.9f, 0.9f, 0.9f, 1.0f};
                gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPECULAR, l1spe, 0);

                gl.glClear(GL.GL_COLOR_BUFFER_BIT
                    |GL.GL_DEPTH_BUFFER_BIT );

                // 面の色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );

                // X軸回転
                gl.glRotatef(15.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(30.0f, 0.0f, 1.0f, 0.0f);

                float cs = 0.5f;
                float gs = 0.6f;
                int xs = 50;
                int zs = 50;
                for(int lz=-3;lz<zs;lz++){
                    for(int lx=-3;lx<xs;lx++){
                        gl.glColor3f(
                          (float)0xff/(float)0xff, 
                          (float)0xff/(float)0xff, 
                          (float)0xff/(float)0xff
                        );
                        gl.glPushMatrix();
                        float ch = cs * (float)(Math.random()*1.0);
                        gl.glScalef(1f,ch, 1f);
                        gl.glTranslatef(lx*gs, -(cs-ch)/2, -1*lz*gs);
                        glut.glutSolidCube(cs);
                        gl.glPopMatrix();
                    }
                }
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1209a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1209a.png)

JOGLで少しずつ回転させた複数の立方体を描画する

JOGLで少しずつ回転させた複数の立方体を描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample50
{
   // 出力画像サイズ
   private static int width = 300;
   private static int height = 300;

   public static void main(String args[])
       throws IOException
   {
       GLDrawableFactory gldf =
           GLDrawableFactory.getFactory();
       GLCapabilities glc = new GLCapabilities();
       glc.setDoubleBuffered(false);
       GLPbuffer buf = gldf.createGLPbuffer(
          glc, null, width, height, null);

       buf.addGLEventListener(
           new GLEventListener(){
           // 初期化
           public void init(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               // 背景色
               gl.glClearColor(
                   (float)0x68/(float)0xff,
                   (float)0x60/(float)0xff,
                   (float)0x60/(float)0xff,
                   1f);
           }

           public void display(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               GLUT glut = new GLUT();
               gl.glViewport(0, 0, width, height);

               // 透視投影
               gl.glMatrixMode(GL.GL_PROJECTION);
               gl.glLoadIdentity();
               float ratio = (float)height/(float)width;
               gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                   5.0f, 40.0f);

               gl.glMatrixMode(GL.GL_MODELVIEW);
               gl.glLoadIdentity();
               gl.glTranslatef(0.0f, -0.5f, -30.0f);

               gl.glEnable(GL.GL_LIGHTING);
               gl.glEnable(GL.GL_LIGHT0);
               gl.glEnable(gl.GL_COLOR_MATERIAL);
               gl.glEnable(GL.GL_NORMALIZE);
               gl.glEnable(GL.GL_DEPTH_TEST);
               gl.glEnable(GL.GL_CULL_FACE);
               gl.glClear(GL.GL_COLOR_BUFFER_BIT
                   |GL.GL_DEPTH_BUFFER_BIT );
               gl.glLightModeli(GL.GL_LIGHT_MODEL_TWO_SIDE,
                   GL.GL_TRUE);

               // 面の色を設定
               gl.glColor3f(
                   (float)0x77/(float)0xff,
                   (float)0x99/(float)0xff,
                   (float)0xff/(float)0xff
               );

               // X軸回転
               gl.glRotatef(15.0f, 1.0f, 0.0f, 0.0f);
               // Y軸回転
               gl.glRotatef(20.0f, 0.0f, 1.0f, 0.0f);

               float px = -7f;
               float py = 0f;
               float pz = 0f;
               float ry = 0f;
               for(int li=0;li<20;li++){
                   gl.glPushMatrix();

                   gl.glTranslatef(px, py, pz);
                   // X軸回転
                   gl.glRotatef(ry, 1.0f, 0.0f, 0.0f);
                   glut.glutSolidCube(0.9f);
                   px += 1f;
                   ry += 10f;
                   gl.glPopMatrix();
               }
           }

           public void reshape(
               GLAutoDrawable dr,
               int x, int y,
               int width, int height){}

           public void displayChanged(
               GLAutoDrawable dr,
               boolean modeChanged,
               boolean deviceChanged){}
         }
       );

       GLContext context =  buf.createContext(null);
       context.makeCurrent();
       buf.display();
       Screenshot.writeToFile(
           new File("sample1208a.png"), width, height, true);
       context.release();
       context.destroy();
   }
}

出力画像()


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLで画像を放射状に配置する

JOGLで画像を放射状に配置するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;
import com.sun.opengl.util.texture.*;

public class JoglSample49
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;
    // テクスチャ
    private static Texture textures[] = null;

    private static String fn[] = {
        "sample1182a.png",
        "sample1189a.png",
        "sample1191a.png",
        "sample1194a.png",
        "sample1195a.png",
        "sample1196a.png",
        "sample1197a.png",
        "sample1198a.png",
        "sample1199a.png",
        "sample1201a.png",
        "sample1202a.png",
        "sample1206a.png"
    };

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0x68/(float)0xff, 
                    (float)0x60/(float)0xff, 
                    (float)0x60/(float)0xff,
                    1f);

                try
                {
                    textures = new Texture[fn.length];
                    for(int fi=0;fi<fn.length;fi++){
                        textures[fi] = 
                            TextureIO.newTexture(
                            new File(fn[fi]), true);
                        textures[fi].enable();
                    }
                }
                catch(IOException ioex){
                    ioex.printStackTrace();
                }

            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, -0.5f, -12.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_AUTO_NORMAL);
                gl.glEnable(GL.GL_DEPTH_TEST);
//                gl.glEnable(GL.GL_CULL_FACE);
                gl.glEnable(GL.GL_TEXTURE_2D);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT
                    |GL.GL_DEPTH_BUFFER_BIT );
                gl.glLightModeli(GL.GL_LIGHT_MODEL_TWO_SIDE, 
                    GL.GL_TRUE);

                gl.glPushMatrix();
                // X軸回転
                gl.glRotatef(15.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(20.0f, 0.0f, 1.0f, 0.0f);

                float da = 360f / fn.length;
                float ps = 2f;
                for(int qi=0;qi<fn.length;qi++){
                    // テクスチャが張られたポリゴンを描画
                    textures[qi].bind();
                    float px = ps * (float)Math.cos(
                        Math.PI * da * qi / 180);
                    float pz = ps * (float)Math.sin(
                        Math.PI * da * qi / 180);
                    float nx = ps * (float)Math.cos(
                        Math.PI * (da * qi+90) / 180);
                    float nz = ps * (float)Math.sin(
                        Math.PI * (da * qi+90) / 180);

                    gl.glBegin(GL.GL_QUADS);
                    gl.glNormal3f(nx, 0.0f, nz);

                    gl.glTexCoord2f(0.0f, 0.0f);
                    gl.glVertex3f(0f, ps/2f, 0f);
                    gl.glTexCoord2f(0.0f, 1.0f);
                    gl.glVertex3f(0f, -ps/2f, 0f);
                    gl.glTexCoord2f(1.0f, 1.0f);
                    gl.glVertex3f(px, -ps/2f,  pz);
                    gl.glTexCoord2f(1.0f, 0.0f);
                    gl.glVertex3f(px, ps/2f, pz);
                    gl.glEnd();
                }

                gl.glPopMatrix();
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1207a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1207a.png)

JOGLでポリゴンに繰り返しテクスチャを貼り付ける

JOGLでポリゴンに繰り返しテクスチャを貼り付けるには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;
import com.sun.opengl.util.texture.*;

public class JoglSample48
{
   // 出力画像サイズ
   private static int width = 300;
   private static int height = 300;

   public static void main(String args[])
       throws IOException
   {
       GLDrawableFactory gldf =
           GLDrawableFactory.getFactory();
       GLCapabilities glc = new GLCapabilities();
       glc.setDoubleBuffered(false);
       GLPbuffer buf = gldf.createGLPbuffer(
          glc, null, width, height, null);

       buf.addGLEventListener(
           new GLEventListener(){
           // 初期化
           public void init(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               // 背景色
               gl.glClearColor(
                   (float)0xf0/(float)0xff,
                   (float)0xf0/(float)0xff,
                   (float)0xf0/(float)0xff,
                   1f);

               try
               {
               Texture texture = TextureIO.newTexture(
                   new File("sf_r.jpg"), true);
               texture.enable();
               texture.bind();
               }
               catch(IOException ioex){}

           }

           public void display(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               GLUT glut = new GLUT();
               gl.glViewport(0, 0, width, height);

               // 透視投影
               gl.glMatrixMode(GL.GL_PROJECTION);
               gl.glLoadIdentity();
               float ratio = (float)height/(float)width;
               gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                   5.0f, 40.0f);

               gl.glMatrixMode(GL.GL_MODELVIEW);
               gl.glLoadIdentity();
               gl.glTranslatef(0.0f, 0.0f, -15.0f);

               gl.glEnable(GL.GL_LIGHTING);
               gl.glEnable(GL.GL_LIGHT0);
               gl.glEnable(gl.GL_COLOR_MATERIAL);
               gl.glEnable(GL.GL_NORMALIZE);
               gl.glEnable(GL.GL_DEPTH_TEST);
               gl.glEnable(GL.GL_CULL_FACE);
               gl.glEnable(GL.GL_TEXTURE_2D);
               gl.glEnable(GL.GL_TEXTURE_GEN_S);
               gl.glEnable(GL.GL_TEXTURE_GEN_T);
               gl.glClear(GL.GL_COLOR_BUFFER_BIT
                   |GL.GL_DEPTH_BUFFER_BIT );

               gl.glPushMatrix();

               gl.glTexParameteri(GL.GL_TEXTURE_2D,
                   GL.GL_TEXTURE_WRAP_S, GL.GL_REPEAT);
               gl.glTexParameteri(GL.GL_TEXTURE_2D,
                   GL.GL_TEXTURE_WRAP_T, GL.GL_REPEAT);

               // Y軸回転
               gl.glRotatef(30.0f, 0.0f, 1.0f, 0.0f);

               // テクスチャが張られたポリゴンを描画
               gl.glBegin(GL.GL_POLYGON);
               gl.glTexCoord2f(0.0f, 1.0f);
               gl.glVertex3f(-2f, -2f,  0.0f);
               gl.glTexCoord2f(1.0f, 1.0f);
               gl.glVertex3f(2f, -2f,  0.0f);
               gl.glTexCoord2f(1.0f, 0.0f);
               gl.glVertex3f(2f,  2f,  0.0f);
               gl.glTexCoord2f(0.0f, 0.0f);
               gl.glVertex3f(-2f,  2f,  0.0f);
               gl.glEnd();

               gl.glPopMatrix();
           }

           public void reshape(
               GLAutoDrawable dr,
               int x, int y,
               int width, int height){}

           public void displayChanged(
               GLAutoDrawable dr,
               boolean modeChanged,
               boolean deviceChanged){}
         }
       );

       GLContext context =  buf.createContext(null);
       context.makeCurrent();
       buf.display();
       Screenshot.writeToFile(
           new File("sample1206a.png"), width, height, true);
       context.release();
       context.destroy();
   }
}

テクスチャ画像(sf_r.jpg)


出力画像(sample1206a.png)



動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLで文字列を描画する

JOGLで文字列を描画するには、以下のコードを実行します。

import java.io.*;
import java.awt.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;
import com.sun.opengl.util.j2d.*;

public class JoglSample47
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, 0.0f, -15.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );

                // 面の色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );

                // X軸回転
                gl.glRotatef(20.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(45.0f, 0.0f, 1.0f, 0.0f);

                // 球を描画
                glut.glutSolidSphere(2.0f, 32, 32);

                // 文字列を描画
                Font font = new Font("Tahoma", java.awt.Font.PLAIN, 40);
                TextRenderer tr = new TextRenderer(font, true, true);
                tr.beginRendering(width, height);
                tr.setColor(0.5f, 0.5f, 0.5f, 1.0f);
                tr.draw("TextRenderer", 20, 40);
                tr.endRendering();


            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1205a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1205a.png)

JOGLで質感を設定する

JOGLで質感を設定するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample46
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, 0.0f, -15.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );


                // 面の色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );

                // X軸回転
                gl.glRotatef(20.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(45.0f, 0.0f, 1.0f, 0.0f);

                gl.glPushMatrix();

                // 環境光を設定
                float ambient[] = {0.2f, 0.2f, 0.1f, 1.0f};
                gl.glMaterialfv(GL.GL_FRONT_AND_BACK, 
                    GL.GL_AMBIENT, ambient, 0);

                // 拡散光を設定
                float diffuse[] = {0.1f, 0.1f, 0.1f, 1.0f};
                gl.glMaterialfv(GL.GL_FRONT_AND_BACK, 
                    GL.GL_DIFFUSE, diffuse, 0);

                // 鏡面光を設定
                float specular[] = {0.4f, 0.4f, 0.3f, 1.0f};
                gl.glMaterialfv(GL.GL_FRONT_AND_BACK, 
                    GL.GL_SPECULAR, specular, 0);
                // specular exponent
                gl.glMaterialf(GL.GL_FRONT_AND_BACK, 
                    GL.GL_SHININESS, 128f*0.4f);

                // 放射光
                float emission[] = {0.1f, 0.1f, 0.2f, 1.0f};
                gl.glMaterialfv(GL.GL_FRONT_AND_BACK, 
                    GL.GL_EMISSION, emission, 0);


                // 球を描画
                glut.glutSolidSphere(2.0f, 32, 32);

                gl.glPopMatrix();
            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1204a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1204a.png)



動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLでストロークフォントで文字列を描画する

JOGLでストロークフォントで文字列を描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample45
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                // 背景色
                gl.glClearColor(
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff, 
                    (float)0xf0/(float)0xff,
                    1f);
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();
                gl.glViewport(0, 0, width, height);

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, 0.0f, -7.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );


                // 色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );

                // X軸回転
                gl.glRotatef(20.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(45.0f, 0.0f, 1.0f, 0.0f);

                // 線の太さを設定
                gl.glLineWidth(4f);

                gl.glTranslated(-1.5, 0.0, 0.0);
                gl.glScalef(0.01f, 0.01f, 0.01f);
                glut.glutStrokeString(GLUT.STROKE_ROMAN, "JOGL");

            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1203a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1203a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1

JOGLで球が輪のようになった画像を描画する

JOGLで球が輪のようになった画像を描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;

public class JoglSample44
{
   // 出力画像サイズ
   private static int width = 300;
   private static int height = 300;

   public static void main(String args[])
       throws IOException
   {
       GLDrawableFactory gldf =
           GLDrawableFactory.getFactory();
       GLCapabilities glc = new GLCapabilities();
       glc.setDoubleBuffered(false);
       GLPbuffer buf = gldf.createGLPbuffer(
          glc, null, width, height, null);

       buf.addGLEventListener(
           new GLEventListener(){
           // 初期化
           public void init(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               // 背景色
               gl.glClearColor(
                   (float)0xf0/(float)0xff,
                   (float)0xf0/(float)0xff,
                   (float)0xf0/(float)0xff,
                   1f);
           }

           public void display(GLAutoDrawable dr)
           {
               GL gl = dr.getGL();
               GLUT glut = new GLUT();
               gl.glViewport(0, 0, width, height);

               // 透視投影
               gl.glMatrixMode(GL.GL_PROJECTION);
               gl.glLoadIdentity();
               float ratio = (float)height/(float)width;
               gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                   5.0f, 40.0f);

               gl.glMatrixMode(GL.GL_MODELVIEW);
               gl.glLoadIdentity();
               gl.glTranslatef(0.0f, 0.0f, -20.0f);

               gl.glEnable(GL.GL_LIGHTING);
               gl.glEnable(GL.GL_LIGHT0);
               gl.glEnable(gl.GL_COLOR_MATERIAL);
               gl.glEnable(GL.GL_NORMALIZE);
               gl.glEnable(GL.GL_DEPTH_TEST);
               gl.glEnable(GL.GL_CULL_FACE);
               gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );


               // 面の色を設定
               gl.glColor3f(
                   (float)0x77/(float)0xff,
                   (float)0x99/(float)0xff,
                   (float)0xff/(float)0xff
               );

               // X軸回転
               gl.glRotatef(20.0f, 1.0f, 0.0f, 0.0f);
               // Y軸回転
               gl.glRotatef(45.0f, 0.0f, 1.0f, 0.0f);

               float rad = 2.8f;
               int num = 12;
               for(float fa=0.0f;fa<360.0f;fa+=(360.0f/num)){
                   gl.glPushMatrix();

                   gl.glTranslated(
                       rad * Math.cos(Math.PI*fa/180f),
                       rad * Math.sin(Math.PI*fa/180f),
                       0.0
                   );

                   // 球を描画
                   glut.glutSolidSphere(1.0f, 32, 32);

                   gl.glPopMatrix();
               }
           }

           public void reshape(
               GLAutoDrawable dr,
               int x, int y,
               int width, int height){}

           public void displayChanged(
               GLAutoDrawable dr,
               boolean modeChanged,
               boolean deviceChanged){}
         }
       );

       GLContext context =  buf.createContext(null);
       context.makeCurrent();
       buf.display();
       Screenshot.writeToFile(
           new File("sample1202a.png"), width, height, true);
       context.release();
       context.destroy();
   }
}

出力画像(sample1202a.png)

JOGLで背景テクスチャの上にポリゴンを描画する

JOGLで背景テクスチャの上にポリゴンを描画するには、以下のコードを実行します。

import java.io.*;
import javax.media.opengl.*;
import com.sun.opengl.util.*;
import com.sun.opengl.util.texture.*;

public class JoglSample43
{
    // 出力画像サイズ
    private static int width = 300;
    private static int height = 300;

    private static Texture texture = null;

    public static void main(String args[])
        throws IOException
    {
        GLDrawableFactory gldf = 
            GLDrawableFactory.getFactory();
        GLCapabilities glc = new GLCapabilities();
        glc.setDoubleBuffered(false);
        GLPbuffer buf = gldf.createGLPbuffer(
           glc, null, width, height, null);

        buf.addGLEventListener(
            new GLEventListener(){
            // 初期化
            public void init(GLAutoDrawable dr)
            {
                try
                {
                texture = TextureIO.newTexture(
                    new File("sf.jpg"), true);
                }
                catch(IOException ioex){}
            }

            public void display(GLAutoDrawable dr)
            {
                GL gl = dr.getGL();
                GLUT glut = new GLUT();

                gl.glViewport(0, 0, width, height);
                // 平行投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                gl.glOrtho(-1.0f, 1.0f, -1.0f, 1.0f, -1.0f, 1.0f);

                // 背景テクスチャを描画
                gl.glClear(GL.GL_COLOR_BUFFER_BIT |GL.GL_DEPTH_BUFFER_BIT );
                gl.glDisable(GL.GL_DEPTH_TEST);
                texture.enable();
                gl.glBindTexture(GL.GL_TEXTURE_2D, 
                  texture.getTextureObject());
                gl.glBegin(GL.GL_QUADS);
                gl.glTexCoord2f(0.0f, 1.0f);
                gl.glVertex2f(-1.0f, -1.0f);
                gl.glTexCoord2f(0.0f, 0.0f);
                gl.glVertex2f(-1.0f, 1.0f);
                gl.glTexCoord2f(1.0f, 0.0f);
                gl.glVertex2f(1.0f, 1.0f);
                gl.glTexCoord2f(1.0f, 1.0f);
                gl.glVertex2f(1.0f, -1.0f);
                gl.glEnd();
                texture.disable();

                // 透視投影
                gl.glMatrixMode(GL.GL_PROJECTION);
                gl.glLoadIdentity();
                float ratio = (float)height/(float)width;
                gl.glFrustum(-1.0f, 1.0f, -ratio, ratio,
                    5.0f, 40.0f);

                gl.glMatrixMode(GL.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0.0f, 0.0f, -7.0f);

                gl.glEnable(GL.GL_LIGHTING);
                gl.glEnable(GL.GL_LIGHT0);
                gl.glEnable(gl.GL_COLOR_MATERIAL);
                gl.glEnable(GL.GL_NORMALIZE);
                gl.glEnable(GL.GL_DEPTH_TEST);
                gl.glEnable(GL.GL_CULL_FACE);

                gl.glPushMatrix();
                // 面の色を設定
                gl.glColor3f(
                    (float)0x77/(float)0xff, 
                    (float)0x99/(float)0xff, 
                    (float)0xff/(float)0xff
                );
                // X軸回転
                gl.glRotatef(10.0f, 1.0f, 0.0f, 0.0f);
                // Y軸回転
                gl.glRotatef(20.0f, 0.0f, 1.0f, 0.0f);
                // 8面体を描画
                glut.glutSolidOctahedron();
                gl.glPopMatrix();

            }

            public void reshape(
                GLAutoDrawable dr,
                int x, int y,
                int width, int height){}

            public void displayChanged(
                GLAutoDrawable dr,
                boolean modeChanged,
                boolean deviceChanged){}
          }
        );

        GLContext context =  buf.createContext(null);
        context.makeCurrent();
        buf.display();
        Screenshot.writeToFile(
            new File("sample1201a.png"), width, height, true);
        context.release();
        context.destroy();
    }
}

出力画像(sample1201a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1