Monday, September 21, 2009

groovyとJOGLで立方体の市松模様を描画する

groovyとJOGLで立方体の市松模様を描画するには、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(-4.0f, -6.0f, -25.0f)

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(30.0f, 1.0f, 0.0f, 0.0f)
// Y軸回転
gl.glRotatef(35.0f, 0.0f, 1.0f, 0.0f)

cs = 0.4f
gs = 0.5f
xs = 20
ys = 20
for(ly in 0..ys-1){
for(lx in 0..xs-1){
if( (lx+ly)%2 == 0 ){
gl.glColor3f(
0xff/0xff as Float,
0xff/0xff as Float,
0xff/0xff as Float
)
} else {
gl.glColor3f(
0xe0/0xff as Float,
0xb0/0xff as Float,
0x40/0xff as Float
)
}
gl.glTranslatef(gs, 0.0f, 0.0f)
glut.glutSolidCube(cs)
}
gl.glTranslatef(-gs*xs as Float, gs, 0.0f)
}
gl.glPopMatrix()
},

reshape: {},
displayChanged: {}
] as GLEventListener
)
GLContext context =
buf.createContext(null)
context.makeCurrent()
buf.display()
Screenshot.writeToFile(
new File("sample1285a.png"),
width, height, true)
context.release()
context.destroy()


出力画像(sample1285a.png)
groovyとJOGLで描画した立方体の市松模様

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

No comments: