JOGLで球にテクスチャをマッピングする

JOGLで球にテクスチャをマッピングするには、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 JoglSample35
{
   // 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, -10.0f);

               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.glTexGeni(GL.GL_S, GL.GL_TEXTURE_GEN_MODE,
                   GL.GL_SPHERE_MAP);
               gl.glTexGeni(GL.GL_T, GL.GL_TEXTURE_GEN_MODE,
                   GL.GL_SPHERE_MAP);

               // 球を描画
               glut.glutSolidSphere(1.5f, 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("sample1193a.png"), width, height, true);
       context.release();
       context.destroy();
   }
}

出力画像(sample1193a.png)


動作環境
JDK6 Upadate13, JOGL 1.1.1