Wednesday, October 21, 2009

groovyとJOGLで複数の球の文字列を描画する

groovyと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 static javax.media.opengl.GL.*;
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.*;

// 出力画像サイズ
width = 300
height = 300

GLDrawableFactory gldf =
GLDrawableFactory.getFactory()
GLCapabilities glc = new GLCapabilities()
glc.setDoubleBuffered(false)
GLPbuffer buf = gldf.createGLPbuffer(
glc, null, width, height, null)
GL gl = buf.getGL()

buf.addGLEventListener(
[ init: {
// 背景色
gl.glClearColor(
0xf0/0xff as Float,
0xf0/0xff as Float,
0xf0/0xff as Float,
1f)
},

display: {
GLUT glut = new GLUT()
gl.glViewport(0, 0, width, height)

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

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

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

gl.glClear(GL_COLOR_BUFFER_BIT
| GL_DEPTH_BUFFER_BIT )

gl.glPushMatrix()

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

// 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)

/* 文字列描画用イメージを作成 */
message = "JOGL"
Font font = new Font(Font.SANS_SERIF,
Font.PLAIN, 10)
FontRenderContext frc = new FontRenderContext(
new AffineTransform(), false as boolean,
false as boolean)
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()) as int)
gr.dispose()

rs = 0.25f
ds = 0.45f
for(lz in 0..img.getHeight()-1){
for(lx in 0..img.getWidth()-1){
gl.glPushMatrix()
gl.glTranslatef(ds*lx as float, 0f, ds*lz as float)
if( img.getRGB(lx, lz) != 0 ){
glut.glutSolidSphere(rs, 16, 16)
}
gl.glPopMatrix()
}
}

gl.glPopMatrix()
},

reshape: {},
displayChanged: {}
] as GLEventListener
)
GLContext context =
buf.createContext(null)
context.makeCurrent()
buf.display()
Screenshot.writeToFile(
new File("sample1315a.png"),
width, height, true)
context.release()
context.destroy()


出力画像(sample1315a.png)
groovyとJOGLで複数の球の文字列を描画した画像

動作環境
JDK1.6 Update14, Groovy 1.6.3, JOGL 1.1.1a

関連情報
groovyとJOGLのまとめ

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