p5.js绘制创意自画像

本文实例为大家分享了p5.js绘制自画像的具体代码，供大家参考，具体内容如下

绘制结果

人物头上的呆毛会一直运动，鼠标出现在画面上时左上角会有一个小猫咪头随着鼠标移动，而且人物的眼睛也会一直看向小猫的方向

代码介绍

整个图全部由贝塞尔曲线，直线和圆组成
贝塞尔曲线的代码结构大概就是

beginShape();
vertex(180,600);//曲线起点
bezierVertex(180,600,300,100,420,600); //第一个控制点坐标，第二个控制点坐标，终点坐标
endShape(CLOSE);

控制点我完全是凭感觉找的，先写一个大概的位置，然后再慢慢调整坐标；

可以先在最后添加一行显示当前鼠标坐标的辅助代码

text(mouseX+" "+mouseY,mouseX,mouseY);

这样找点会方便很多；

然后就是反复用贝塞尔曲线，由于它是填充图形，所以要注意覆盖关系，先画头发，然后再身体，脸等等一层层往上；

动态的部分就是添加了两根会动的呆毛，设置时间，让它周期性左右摇摆

var t=millis()/500;

 stroke(254,219,126);
 strokeWeight(2);
 fill(255,245,204);
 beginShape();
 vertex(300,70);
 bezierVertex(260+20*abs(sin(t)),60,275+20*abs(sin(t)),50,270+20*abs(sin(t)),30);
 bezierVertex(280+20*abs(sin(t)),50,275+20*abs(sin(t)),60,300,70);
 endShape(CLOSE);
 beginShape();
 vertex(300,70);
 bezierVertex(310+20*abs(sin(t)),60,315+20*abs(sin(t)),50,320+20*abs(sin(t)),40);
 endShape(CLOSE);//呆毛

小猫原本是在衣服上不会动的

因为要做交互，想不出来还能做什么，所以把所有坐标都改成了跟mouseX，mouseY相关的变量；
然后把眼睛高光的圆心坐标也改成了会随鼠标点移动的变量：

var t1=(mouseX-300)/300*4.5;
var t2=(mouseY-235)/365*4.5;
fill(255);
noStroke();
ellipse(253+t1,235+t2,5,10);
ellipse(353+t1,235+t2,5,10);//眼睛高光

总结

这次试验总体难度不算大，就是要一直计算调整坐标非常麻烦，所以也只能画出这种笔画非常少的简笔画，再复杂写实一点可能会比较困难，其实代码大部分都是重复的，只用改一下坐标就可以了，总的来说做起来还是很有趣的。

完整代码

function setup(){
 createCanvas(600,600);
 }

function draw(){
 background(249,234,239);
 fill(255);

 drawgirl();
 drawcat();

 // text(mouseX+" "+mouseY,mouseX,mouseY);
}

function drawgirl(){

 stroke(254,219,126);
 strokeWeight(2);
 fill(255,243,187);
 beginShape();
 vertex(130,600);
 bezierVertex(-50,470,230,470,80,350);
 bezierVertex(20,290,100,260,135,220);
 bezierVertex(180,150,150,70,300,60);
 bezierVertex(450,70,420,150,465,220);
 bezierVertex(500,260,580,290,520,350);
 bezierVertex(370,470,650,470,470,600);
 endShape();//头发

 fill(197,235,255);
 stroke(252,235,160);
 beginShape();
 vertex(180,600);
 bezierVertex(180,600,300,100,420,600);
 endShape(CLOSE);//身体

 fill(255);
 stroke(244,206,200);
 beginShape();
 vertex(180,220);
 bezierVertex(180,400,290,300,290,380);
 bezierVertex(290,410,310,410,310,380);
 bezierVertex(310,300,420,400,420,220);
 bezierVertex(420,220,330,200,300,130);
 bezierVertex(270,200,180,220,180,220);
 endShape(CLOSE);//脸

 beginShape()
 vertex(179,223);
 bezierVertex(150,225,150,250,181,258);
 endShape(CLOSE);
 beginShape()
 vertex(421,223);
 bezierVertex(450,225,450,250,419,258);
 endShape(CLOSE);//耳朵

 noFill();
 stroke(254,219,126);
 beginShape();
 vertex(420,220);
 bezierVertex(420,220,330,200,300,130);
 bezierVertex(270,200,180,220,180,220);
 bezierVertex(180,220,270,200,300,130);
 bezierVertex(330,200,420,220,420,220);
 endShape(CLOSE);//发际线

 stroke(227,156,160);
 strokeWeight(3);
 beginShape();
 vertex(230,210)
 bezierVertex(245,200,260,200,270,210);
 bezierVertex(260,200,245,200,230,210);
 endShape(CLOSE);
 beginShape();
 vertex(370,210);
 bezierVertex(355,200,340,200,330,210);
 bezierVertex(340,200,355,200,370,210);
 endShape(CLOSE);//眉毛

 stroke(227,109,115);
 beginShape();
 vertex(290,300);
 bezierVertex(295,310,305,310,310,300);
 endShape();//嘴巴

 fill(0);
 ellipse(250,240,15,25);
 ellipse(350,240,15,25);//眼睛

 var t1=(mouseX-300)/300*4.5;
 var t2=(mouseY-235)/365*4.5;
 fill(255);
 noStroke();
 ellipse(253+t1,235+t2,5,10);
 ellipse(353+t1,235+t2,5,10);//眼睛高光

 noStroke();
 fill(254,221,224);
 ellipse(230,280,25,25);
 ellipse(370,280,25,25);//腮红

 var t=millis()/500;
 stroke(254,219,126);
 strokeWeight(2);
 fill(255,245,204);
 beginShape();
 vertex(300,70);
 bezierVertex(260+20*abs(sin(t)),60,275+20*abs(sin(t)),50,270+20*abs(sin(t)),30);
 bezierVertex(280+20*abs(sin(t)),50,275+20*abs(sin(t)),60,300,70);
 endShape(CLOSE);
 beginShape();
 vertex(300,70);
 bezierVertex(310+20*abs(sin(t)),60,315+20*abs(sin(t)),50,320+20*abs(sin(t)),40);
 endShape(CLOSE);//呆毛
 }

function drawcat(){

 stroke(191,126,120);
 fill(254,211,179);
 beginShape();
 vertex(mouseX-48,mouseY-33);
 bezierVertex(mouseX-50,mouseY-45,mouseX-50,mouseY-60,mouseX-31,mouseY-49);
 endShape(CLOSE);
 beginShape();
 vertex(mouseX+8,mouseY-33);
 bezierVertex(mouseX+10,mouseY-45,mouseX+10,mouseY-60,mouseX-9,mouseY-49);
 endShape(CLOSE);//猫耳朵

  fill(255);
 ellipse(mouseX-20,mouseY-20,60,55);//猫猫头

 noStroke();
 fill(254,211,179);
 beginShape();
 vertex(mouseX-50,mouseY-20);
 bezierVertex(mouseX-30,mouseY-20,mouseX-20,mouseY-30,mouseX-20,mouseY-40);
 bezierVertex(mouseX-20,mouseY-30,mouseX-10,mouseY-20,mouseX+10,mouseY-20);
 bezierVertex(mouseX+10,mouseY-60,mouseX-50,mouseY-60,mouseX-50,mouseY-20);
 endShape(CLOSE);
 stroke(191,126,120);
 beginShape();
 vertex(mouseX+10,mouseY-20);
 bezierVertex(mouseX+10,mouseY-60,mouseX-50,mouseY-60,mouseX-50,mouseY-20);
 bezierVertex(mouseX-50,mouseY-60,mouseX+10,mouseY-60,mouseX+10,mouseY-20);
 endShape(CLOSE);//头上黄色部分的毛

 stroke(191,126,120);
 fill(191,126,120);
 ellipse(mouseX-35,mouseY-27,5,10);
 ellipse(mouseX-5,mouseY-27,5,10);//眼睛
 ellipse(mouseX-20,mouseY-22,4,2);//鼻子

 noFill();
 beginShape();
 vertex(mouseX-28,mouseY-14);
 bezierVertex(mouseX-24,mouseY-13,mouseX-22,mouseY-14,mouseX-20,mouseY-15);
 bezierVertex(mouseX-18,mouseY-13,mouseX-16,mouseY-13,mouseX-12,mouseY-14);
 endShape();//嘴巴

 stroke(191,126,120);
 line(mouseX-50,mouseY-20,mouseX-43,mouseY-19);
 line(mouseX-48,mouseY-11,mouseX-42,mouseY-14);
 line(mouseX+10,mouseY-20,mouseX+3,mouseY-19);
 line(mouseX+8,mouseY-11,mouseX+2,mouseY-14);//胡子

}

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