公式和递归实现的初步分形【2-递归篇】
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?????????????????????????????????????????????2.尽量把思路理清，把代码简化
谢宾斯基三角形
?升级版谢宾斯基三角形，有3D效果
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谢宾斯基地毯
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科赫曲线
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科赫雪花
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package cn.kml.递归20130706;import java.awt.Color;import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;public class RecuesionListener implements ActionListener{private Graphics g;static int state=10;static int state1=6;static int state2=2;static int state3=7;static int state4=7;static int state5=10;public RecuesionListener(Graphics g){this.g=g;}public void actionPerformed(ActionEvent e) {//g.clearRect(0, 0, 750, 690);if(e.getActionCommand().equals("Sierpinske")){g.setColor(Color.WHITE);draw(350, 60, 50, (int)(50+300*Math.sqrt(3))+10, 650, (int)(50+300*Math.sqrt(3))+10, state);//g.setColor(new Color(210,210,200));//draw(340, 65, 40, (int)(50+300*Math.sqrt(3))+15, 640, (int)(50+300*Math.sqrt(3))+15, state);//g.setColor(new Color(180,180,170));//draw(330, 70, 30, (int)(50+300*Math.sqrt(3))+20, 630, (int)(50+300*Math.sqrt(3))+20, state);}if(e.getActionCommand().equals("Rectangle")){drawRec(50,50,650,state1);}if(e.getActionCommand().equals("Koch Curve")){drawKoch(50,600,700,600,state3);}if(e.getActionCommand().equals("Koch-Snow")){drawSnow(700,550,400,(int)(550-Math.sqrt(3)*300),100,550,state4);}if(e.getActionCommand().equals("Tree")){drawTree1(300,600,100,5,1);}}public void draw(int x1,int y1,int x2,int y2,int x3,int y3,int state){state--;if(state>0){//画出最外面的三角形g.drawLine(x1, y1, x2, y2);g.drawLine(x1, y1, x3, y3);g.drawLine(x2, y2, x3, y3);//算出任意两点的中点坐标int x12=(int)((x1+x2)/2);int y12=(int)((y1+y2)/2);int x23=(int)((x2+x3)/2); int y23=(int)((y2+y3)/2);int x13=(int)((x1+x3)/2);int y13=(int)((y1+y3)/2);g.drawLine(x12, y12, x13, y13);g.drawLine(x12, y12, x23, y23);g.drawLine(x13, y13, x23, y23);//递归调用draw(x1,y1,x12,y12,x13,y13,state);draw(x12,y12,x2,y2,x23,y23,state);draw(x13,y13,x23,y23,x3,y3,state);}else{return;}}public void drawRec(int x1,int y1,int x2,int state1){state1--;//先画出最外围的正方形g.drawLine(50,50,650,50);g.drawLine(50,50,50,650);g.drawLine(650,50,650,650);g.drawLine(50,650,650,650);//循环化出里面的正方形if(state1>0){int x11=(int)((x2-x1)/3+x1);int x22=(int)(2*(x2-x1)/3+x1);int y11=(int)((x2-x1)/3+y1);int y22=(int)(2*(x2-x1)/3+y1);g.fillRect(x11, y11, x22-x11,x22-x11);//递归调用函数drawRec(x1,y1,x11,state1);drawRec(x22,y1,x2,state1);drawRec(x1,y22,x11,state1);drawRec(x22,y22,x2,state1);drawRec(x11,y1,x22,state1);drawRec(x22,y11,x2,state1);drawRec(x11,y22,x22,state1);drawRec(x1,y11,x11,state1);}else{return;}}public void drawKoch(int x1,int y1,int x2,int y2,int state3){int x3 = (2*x1+x2)/3;int x4 = (x1+2*x2)/3;int y3 = (2*y1+y2)/3;int y4 = (y1+2*y2)/3;int x5=0,y5=0;g.setColor(Color.BLUE);if(y1 == y2){x5 = (x3+x4)/2;y5 = (int)(y1-Math.sqrt(3)*(x4-x3)/2);}else if(y1>y2){if(x1<x2){x5 = x1;y5 = y4;}else if(x1>x2){x5 = x2;y5 = y3;}}else if(y1<y2){if(x1>x2){x5 = x1;y5 = y4;}else if(x1<x2){x5 = x2;y5 = y3;}}if(state3==1){g.drawLine(x1, y1, x2, y2);}if(state3<=0){return;}drawKoch(x1,y1,x3,y3,state3-1);drawKoch(x3,y3,x5,y5,state3-1);drawKoch(x5,y5,x4,y4,state3-1);drawKoch(x4,y4,x2,y2,state3-1);}public void drawSnow(int x1,int y1,int x2,int y2,int x3,int y3,int state4){g.setColor(Color.BLUE);if(state4>0){drawKoch(x2,y2,x1,y1,state4-1);drawKoch(x3,y3,x2,y2,state4-1);drawKoch(x1,y1,x3,y3,state4-1);}else{return;}}}?