Sunday, September 20, 2009

groovyとJOGLで市松模様の面を描画する

groovyとJOGLで市松模様の面を描画するには、以下のコードを実行します。


import static javax.media.opengl.GL.*;
import java.io.*;
import 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(
0x77/0xff as Float,
0x99/0xff as Float,
0xff/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(-2.0f, -2.0f, -12.0f)

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()
// X軸回転
gl.glRotatef(-70.0f, 1.0f, 0.0f, 0.0f)

tw = 0.4f
th = 0.4f
xs = 10
ys = 10
for(ly in 0..ys-1){
for(lx in 0..xs-1){
if( (lx+ly)%2 == 0 ){
gl.glColor3f(
0xf0/0xff as Float,
0xf0/0xff as Float,
0xf0/0xff as Float
)
} else {
gl.glColor3f(
0x40/0xff as Float,
0x40/0xff as Float,
0x40/0xff as Float
)
}
gl.glRectf(lx*tw as Float,
ly*th as Float,
(lx+1)*tw as Float,
(ly+1)*tw as Float)
}
}
gl.glPopMatrix()
},

reshape: {},
displayChanged: {}
] as GLEventListener
)
GLContext context =
buf.createContext(null)
context.makeCurrent()
buf.display()
Screenshot.writeToFile(
new File("sample1284a.png"),
width, height, true)
context.release()
context.destroy()


出力画像(sample1284a.png)


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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