facelet.java

java写的3D程序,src目录下有其源程序.

package myprojects.graph3dapp;

import java.awt.*;

/**三角面类*/
class Facelet {
	protected GraphObject3D object;
	public int vertexs[] = new int[3];
	protected Color colors[] = new Color[3];
	protected Material material;
	
	public Facelet(GraphObject3D object) {
		this.object = object;
	}
	
	public Facelet(GraphObject3D object, int v0, int v1, int v2) {
		this.object = object;
		vertexs[0] = v0;
		vertexs[1] = v1;
		vertexs[2] = v2;
	}
	
	public Facelet(GraphObject3D object, int vertexs[]) {
		this.object = object;
		this.vertexs = new int[3];
		for(int i=0; i<3; i++) this.vertexs[i] = vertexs[i];
	}
	
	public Facelet(Facelet f) {
		this.object = f.object;
		for(int i=0; i<3; i++) this.vertexs[i] = f.vertexs[i];
	}
	
	
	public Color getColor(int index) {
		return colors[index];
	}
	
	public void setMaterial(Material material) {
		this.material = material;
	}
	
	public GraphObject3D getObject() {
		return object;
	}
	
	public Vector3d getVertex(int index) {
		return object.getVertex(vertexs[index]);
	}
	
	public Vector3d normalize() {
		Vector3d v0 = Vector3d.sub(object.getVertex(vertexs[1]), 
								   object.getVertex(vertexs[0]));
		Vector3d v1 = Vector3d.sub(object.getVertex(vertexs[2]), 
								   object.getVertex(vertexs[0]));
		//return Vector3d.cross(v0, v1);
		Vector3d n = Vector3d.cross(v0, v1);
		n.normalize();
		return n;
	}
	
	public String toString() {
		return 	String.valueOf(vertexs[0])+", "+
				String.valueOf(vertexs[1])+", "+
				String.valueOf(vertexs[2]);
	}
}