cone.java

java写的3D程序,src目录下有其源程序.

package myprojects.graph3dapp;

import java.awt.*;

public class Cone extends GraphObject3D {
	Vector3d vertexs[];
	Facelet faces[];
	
	public Cone(Vector3d v, double r, double h, int ns, Material material) {
		create(v, r, h, ns, material);	
	}
	
	public Cone(Vector3d v, double r, double h, int ns) {
		create(v, r, h, ns, material);
	}
	
	protected void create(Vector3d v, double r, double h, int ns, Material material) {
		this.material = material;
		int i;
		
		vertexs = new Vector3d[ns+2];
		for(i=0; i<ns; i++) {
			double af = 2*Math.PI*i/ns;
			vertexs[i] = new Vector3d(v.x+r*Math.cos(af), v.y, v.z+r*Math.sin(af));
		}
		vertexs[ns] = new Vector3d(v);
		vertexs[ns+1] = new Vector3d(v.x, v.y+h, v.z);
		
		faces = new Facelet[ns*2];
		for(i=0; i<ns; i++) {
			int v1 = i+1;
			if(i == ns-1) v1 = 0;
			faces[2*i] = new Facelet(this, ns, i, v1);
			faces[2*i+1] = new Facelet(this, ns+1, v1, i);
		}
		
		for(i=0; i<faces.length; i++) faces[i].setMaterial(material);
	}
	
	public Vector3d getVertex(int index) {
		return vertexs[index];
	}
	
	public int vertexCount() {
		return vertexs.length;
	}
	
	public Facelet getFace(int index) {
		return faces[index];
	}
	
	public int faceCount() {
		return faces.length;
	}
}