groovyとJOGLで光源を設定する

groovyとJOGLで光源を設定するには、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(
      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(0.0f, 0.0f, -10.0f)

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


    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)
    // 面の色を設定
    gl.glColor3f(
      0x77/0xff as Float, 
      0x99/0xff as Float, 
      0xff/0xff as Float
    )
    // 球を描画
    glut.glutSolidSphere(1.5f, 32, 32)
    gl.glPopMatrix()
  },

  reshape: {},
  displayChanged: {}
] as GLEventListener
)
GLContext context = 
  buf.createContext(null)
context.makeCurrent()
buf.display()
Screenshot.writeToFile(
  new File("sample1296a.png"), 
  width, height, true)
context.release()
context.destroy()

出力画像()


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