Java分形怎么绘制山脉模型

这篇文章主要为大家分析了Java分形怎么绘制山脉模型的相关知识点，内容详细易懂，操作细节合理，具有一定参考价值。如果感兴趣的话，不妨跟着跟随小编一起来看看，下面跟着小编一起深入学习“Java分形怎么绘制山脉模型”的知识吧。

如何绘制一个山脉

构思设计

任意选取三个点，选取一个范围和一个比率，每一个都对这三个点取中点，中点的纵坐标加一个在范围内的随机值，当完成一次递归之后缩小这个范围即range*rate
连线的时候，将三角形的一个点和这个点的两条边生成的中点相连，最后将三条边的中点相连
所以应该有四个递归调用。

代码实现及注解

package Mountion;import java.awt.Graphics;import java.util.ArrayList;import java.util.List;import java.util.Random;import javax.swing.JFrame;public class ShowUI {    List<Shape> list=new ArrayList<>();    int i=0;    public void divide(int x1,int x2,int x3,int y1,int y2,int y3,int range,double rate,int times,Graphics g,Shape p){        if(times==0){            //画线，构成一个三角形            g.drawLine(x1, y1, x2, y2);            g.drawLine(x3, y3, x2, y2);            g.drawLine(x1, y1, x3, y3);            return ;        }        else{            times--;            Random rand=new Random();            //注意数据需要初始化            int x4=0,x5=0,x6=0,y4=0,y5=0,y6=0;            int flag1=0,flag2=0,flag3=0;            //遍历这个表            for(Shape s : list) {                //相等的两种状况                if((s.pX1()==x1&&s.pX2()==x2&&s.pY1()==y1&&s.pY2()==y2)||(s.pX1()==x2&&s.pX2()==x1&&s.pY1()==y2&&s.pY2()==y1)){                    if(s.show(g)==1){                        //如果这个边已经被使用过了，那么此时说明中点已经生成，只需要读出来中点即可                        x4=s.pX3();                        y4=s.pY3();                        //System.out.println(times+":same:==================size:"+(i++));                    }                    else{                        //如果这条边存在但没有使用,那么生成这个中点，进行更新，其实就是将原来的shape删除掉，加入一个新的。                        x4=(x1+x2)/2;                        y4=(y1+y2)/2+rand.nextInt(range*2)-range;                        //System.out.println(times+"：1");                        list.remove(s);                        p =new Shape(x1,x2,x4,y1,y2,y4,1);                        list.add(p);                    }                    flag1=1;                    break;                }                                                            }            if(flag1==0){                //System.out.println(times+":before:==================size:"+(i++));                //如果不存在，这个很简单，只需要构造一个就好了                x4=(x1+x2)/2;                y4=(y1+y2)/2+rand.nextInt(range*2)-range;                p =new Shape(x1,x2,x4,y1,y2,y4,1);                list.add(p);            }            //后面两种情况类似            for(Shape s : list) {                if((s.pX1()==x1&&s.pX2()==x3&&s.pY1()==y1&&s.pY2()==y3)||(s.pX1()==x3&&s.pX2()==x1&&s.pY1()==y3&&s.pY2()==y1)){                    if(s.show(g)==1){                        x5=s.pX3();                        y5=s.pY3();                    }                    else{                        x5=(x1+x3)/2;                        y5=(y1+y3)/2+rand.nextInt(range*2)-range;                        list.remove(s);                        p =new Shape(x1,x3,x5,y1,y3,y5,1);                        list.add(p);                    }                    flag2=1;                    break;                }            }            if(flag2==0){                x5=(x1+x3)/2;                y5=(y1+y3)/2+rand.nextInt(range*2)-range;                //System.out.println(times+":before1:==================size:"+(i++));                p =new Shape(x1,x2,x4,y1,y2,y4,1);                list.add(p);            }            for(Shape s : list){                if((s.pX1()==x2&&s.pX2()==x3&&s.pY1()==y2&&s.pY2()==y3)||(s.pX1()==x3&&s.pX2()==x2&&s.pY1()==y3&&s.pY2()==y2)){                    if(s.show(g)==1){                        x6=s.pX3();                        y6=s.pY3();                    }                    else{                        x6=(x2+x3)/2;                        y6=(y2+y3)/2+rand.nextInt(range*2)-range;                        list.remove(s);                        p =new Shape(x2,x3,x6,y2,y3,y6,1);                        list.add(p);                    }                    flag3=1;                    break;                }            }            if(flag3==0){                x6=(x2+x3)/2;                y6=(y2+y3)/2+rand.nextInt(range*2)-range;                //System.out.println(times+":before2:==================size:"+(i++));                p =new Shape(x1,x2,x4,y1,y2,y4,1);                list.add(p);            }            //逐渐缩小范围            range=(int)(range*rate);            //将边添加进行，类似一个初始话，标记位为0            p =new Shape(x1,x4,y1,y4,0);            list.add(p);            p =new Shape(x1,x5,y1,y5,0);            list.add(p);            p =new Shape(x4,x5,y4,y5,0);            list.add(p);            p =new Shape(x2,x4,y2,y4,0);            list.add(p);            p =new Shape(x2,x6,y2,y6,0);            list.add(p);            p =new Shape(x4,x6,y4,y6,0);            list.add(p);            p =new Shape(x3,x5,y3,y5,0);            list.add(p);            p =new Shape(x3,x6,y3,y6,0);            list.add(p);            p =new Shape(x5,x6,y5,y6,0);            list.add(p);            //画四个三角形            divide(x1,x4,x5,y1,y4,y5,range,rate,times,g,p);            divide(x2,x4,x6,y2,y4,y6,range,rate,times,g,p);                        divide(x3,x5,x6,y3,y5,y6,range,rate,times,g,p);            divide(x4,x5,x6,y4,y5,y6,range,rate,times,g,p);        }    }    public static void main(String[] args) {        // TODO Auto-generated method stub        JFrame moun=new JFrame();        moun.setSize(1000, 600);        moun.setLocationRelativeTo(null);        moun.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        moun.setVisible(true);        Graphics g=moun.getGraphics();//获取窗体        int x1=500,x2=100,x3=850;        int y1=100,y2=400,y3=400;        int range=200;        double rate=0.5;        int times=7;        ShowUI a=new ShowUI();        try {            Thread.sleep(566);        } catch (InterruptedException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        Shape p = null;        //System.out.println(100);        a.divide(x1, x2, x3, y1, y2, y3, range, rate,times,g,p);    }}

Shape类

package Mountion;import java.awt.Graphics;public class Shape {    private int x1,x2,x3,y1,y2,y3;    private int flag;    //这个构造函数存储的是一个边的两个点，以及这个边生成的中点    public Shape(int x1,int x2,int x3,int y1,int y2,int y3,int flag){        this.x1=x1;        this.x2=x2;        this.x3=x3;        this.y1=y1;        this.y2=y2;        this.y3=y3;        this.flag=flag;    }//这个构造函数存储的一条边的两个点    public Shape(int x1,int x2,int y1,int y2,int flag){        this.x1=x1;        this.x2=x2;        this.y1=y1;        this.y2=y2;        this.flag=flag;    }    //flag标记位，这条边是否被使用过    public int show(Graphics g) {        // TODO Auto-generated method stub        return flag;    }    public int pX1(){        return x1;    }    public int pX2(){        return x2;    }    public int pX3(){        return x3;    }    public int pY1(){        return y1;    }    public int pY2(){        return y2;    }    public int pY3(){        return y3;    }}

效果展示

这篇文章主要为大家分析了Java分形怎么绘制山脉模型的相关知识点，内容详细易懂，操作细节合理，具有一定参考价值。如果感兴趣的话，不妨跟着跟随小编一起来看看，下面跟着小编一起深入学习“Java分形怎么绘制山脉模型”的知识吧。