p5.js绘制创意自画像
时间：2021-08-07 08:43:40 | 栏目：JavaScript代码 | 点击：次
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
}