pointshape.java

Java3D 采用IndexedPointArray方法生成点。是Applet程序

//pointShape.java
import javax.media.j3d.*;

public class pointShape extends Shape3D {
    private float vert[] = { 
        .5f, 0.5f,0.0f,
        -0.5f, 0.5f,0.0f,
        0.3f, 0.0f,0.0f,
        -0.3f, 0.0f,0.0f,
        -0.5f,-0.5f,0.0f,
        0.5f,-0.5f,0.0f,
       };
    private float color[] = {
        0.0f,0.5f,1.0f,
        0.5f,0.0f,1.0f,
        0.0f,0.8f,2.0f,
        1.0f,0.0f,0.3f,
        0.0f,1.0f,0.3f,
        0.3f,0.8f,0.0f,
      };

    public pointShape() {
        int[] index = { 0 , 2 , 3 , 4 };
        int vCount = 6;
        int iCount = 4;
        IndexedPointArray point = new IndexedPointArray(vCount, 
                            IndexedPointArray.COORDINATES|
                            IndexedPointArray.COLOR_3,
                            iCount);
          point.setCoordinates(0,vert);
          point.setColors(0,color);
          point.setCoordinateIndices(0,index);
          point.setColorIndices(0,index);
        PointAttributes pa = new PointAttributes();
          pa.setPointSize(20.0f);
          pa.setPointAntialiasingEnable(true);
        Appearance ap = new Appearance();
         ap.setPointAttributes(pa);
        this.setGeometry(point);
        this.setAppearance(ap); 
    }
}
//end of pointShape.java