(java小程序)能旋转的立方体

package com.brothers.swing; public class Converter { double angle = 30; int xDValue = 250; int yDValue = 320; Point3D centre; public Converter(){ //设置中心点 centre = new Point3D(); centre.setX(Cube.CUBE_WIDTH/2); centre.setY(Cube.CUBE_WIDTH/2); centre.setZ(Cube.CUBE_WIDTH/2); } public Point2D converTo2D(Point3D p3){ Point2D p2 = new Point2D(); //得到a,b值 int y = p3.getY(); double seita = angle * Math.PI / 180; int yConverTo2D = (int)(y * Math.sin(seita)); int a = (int)(yConverTo2D * Math.sin(seita)); int b = (int)(yConverTo2D * Math.cos(seita)); //设置p2值 p2.setX(xDValue + p3.getX() - a); p2.setY(yDValue - p3.getZ() + b); return p2; } public void reChange(Point3D oldP,Point3D changeP){ changeP.setX(oldP.getX()); changeP.setY(oldP.getY()); changeP.setZ(oldP.getZ()); } public void rotato(int index,int value,Point3D oldP,Point3D changeP) { // if(value == 0){ // return ; // } //index == 0 : x轴旋转 // == 1 : y轴旋转 // == 2 : z轴旋转 if(index == 0){ //x不变 int x = changeP.getX(); int y = changeP.getY(); int z = changeP.getZ(); //y和z的平方和的平方根 int r = (int)Math.sqrt(Math.pow(y, 2) + Math.pow(z,2)); ///角度的计算 double c = (value * Math.PI / 180); double a = 0; if(y != 0){ a = Math.atan(z/y); }else{ a = 1.0/2.0 * Math.PI; } double b = c + a; //新的y,z值 int y2 = (int)(r * Math.sin(b)); int z2 = (int)(r * Math.cos(b)); changeP.setX(x); changeP.setY(y2); changeP.setZ(z2); // System.out.println(p); }else if(index == 1){ // Point3D pCom1 = (Point3D)changeP.clone(); //y不变 int y = changeP.getY(); int x = changeP.getX(); int z = changeP.getZ(); //y和z的平方和的平方根 int r = (int)Math.sqrt(Math.pow(x, 2) + Math.pow(z,2)); ///角度的计算 double c = (value * Math.PI / 180); double a = 0; if(z != 0){ a = Math.atan(x/z); }else{ a = 1.0/2.0 * Math.PI; } double b = c + a; //新的y,z值 int x2 = (int)(r * Math.cos(b)); int z2 = (int)(r * Math.sin(b)); changeP.setX(x2); changeP.setY(y); changeP.setZ(z2); // Point3D pCom2 = (Point3D)changeP.clone(); // System.out.println(pCom1.equals(pCom2)); }else if(index == 2){ //z不变 int x = changeP.getX(); int y = changeP.getY(); int z = changeP.getZ(); //y和z的平方和的平方根 int r = (int)Math.sqrt(Math.pow(x, 2) + Math.pow(y,2)); ///角度的计算 double c = (value * Math.PI / 180); double a = 0; if(x != 0){ a = Math.atan(y/x); }else{ a = 1.0/2.0 * Math.PI; } double b = c + a; //新的y,z值 int x2 = (int)(r * Math.cos(b)); int y2 = (int)(r * Math.sin(b)); changeP.setX(x2); changeP.setY(y2); changeP.setZ(z); } } }