テクスチャ

/*
*   JAVA3D でテクスチャを描くアプレット
*/

import java.applet.Applet;
import java.awt.*;
import java.awt.image.*;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.image.TextureLoader;

/* <applet code="java3Dtest06" width=300 height=300></applet> */

public class java3Dtest06 extends Applet{
  private SimpleUniverse universe = null;

  public BranchGroup createSceneGraph(){
    BranchGroup root = new BranchGroup();

    TransformGroup trans = new TransformGroup();
    trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    root.addChild(trans);

    Point3d[] verteces = new Point3d[4];

    verteces[0] = new Point3d(-0.5, -0.5, 0.0);
    verteces[1] = new Point3d(0.5, -0.5, 0.0);
    verteces[2] = new Point3d(0.5, 0.5, 0.0);
    verteces[3] = new Point3d(-0.5, 0.5, 0.0);

    TexCoord2f[] texcoords = new TexCoord2f[4];

    texcoords[0] = new TexCoord2f(0.0f, 0.0f);
    texcoords[1] = new TexCoord2f(0.99f, 0.0f);
    texcoords[2] = new TexCoord2f(0.99f, 0.99f);
    texcoords[3] = new TexCoord2f(0.0f, 0.99f); 

    BufferedImage bimage = new BufferedImage(2, 2, BufferedImage.TYPE_INT_ARGB);
    int[] tex_image = ((DataBufferInt)bimage.getRaster().getDataBuffer()).getData();

    tex_image[0] = 0xFFFF0000;
    tex_image[1] = 0x7F0000FF;
    tex_image[2] = 0xFF0000FF;
    tex_image[3] = 0xFFFFFFFF;

    ImageComponent2D icomponent2d = new ImageComponent2D(ImageComponent.FORMAT_RGBA, bimage);

    Texture2D tex2d = new Texture2D(Texture.BASE_LEVEL, Texture.RGBA, 2, 2);
    tex2d.setImage(0, icomponent2d);

    Appearance app = new Appearance();

    app.setTexture(tex2d);

    app.setTransparencyAttributes(new TransparencyAttributes(TransparencyAttributes.BLENDED, 0.0f));

    QuadArray geometry = new QuadArray(verteces.length, GeometryArray.COORDINATES | GeometryArray.TEXTURE_COORDINATE_2);
    geometry.setCoordinates(0, verteces);
    geometry.setTextureCoordinates(0, 0, texcoords);
    
    Shape3D shape = new Shape3D(geometry, app);
    //shape.setCapability(Shape3D.ALLOW_GEOMETRY_READ);
    trans.addChild(shape);

    Alpha rotationAlpha = new Alpha(-1, 0);
    RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, trans);

    root.addChild(rotator);

    root.compile();

    return root;
  }

  public void init() {
    GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
    Canvas3D canvas3d = new Canvas3D(config);
    this.setLayout(new BorderLayout());
    this.add(canvas3d, BorderLayout.CENTER);

    BranchGroup scene = createSceneGraph();

    universe = new SimpleUniverse(canvas3d);

    universe.getViewingPlatform().setNominalViewingTransform();
    universe.addBranchGraph(scene);
  }

  public void destroy(){
    universe.cleanup();
  }
}