ｊ０９１４ｂ - プログラム倉庫

import javax.media.j3d.*;
import javax.vecmath.*;

public class Plate extends Shape3D{
    public Plate(){


        Point3f[] vertices = new Point3f[6];

        // defines six vertices with their coordinates
        vertices[0] = new Point3f(1.0f,-1.0f, 0.5f);
        vertices[1] = new Point3f(1.0f,    0, 0.5f);
        vertices[2] = new Point3f(1.0f, 1.0f, 0.5f);
        vertices[3] = new Point3f(1.0f,-1.0f,-0.5f);
        vertices[4] = new Point3f(1.0f,    0,-0.5f);
        vertices[5] = new Point3f(1.0f, 1.0f,-0.5f);
        
        // gives slightly different colors to the six vertices
        Color3f[] colors = new Color3f[6];
        for(int i=0; i<6; i++){
            colors[i]=new Color3f(1.0f-i*(1.0f/6.0f), i*(1.0f/6.0f),0);
        }
        
        // defines a new geometry
        IndexedQuadArray geometry =
            new IndexedQuadArray(
                    6,
                    GeometryArray.COORDINATES | GeometryArray.COLOR_3,
                    8);    
        
        geometry.setCoordinates(0, vertices);
        geometry.setColors(0, colors);
        
        // defines a cell structure
        int[] coordInds = new int[8];    
        // a square
        coordInds[0]=0;
        coordInds[1]=3;
        coordInds[2]=4;
        coordInds[3]=1;
        // another square
        coordInds[4]=1;
        coordInds[5]=4;
        coordInds[6]=5;
        coordInds[7]=2;
        
        // provides the geometry with a cell structure
        geometry.setCoordinateIndices(0, coordInds);
    
        // registers the geometry to this shape3d
        setGeometry(geometry);
        
    }

}