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)


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