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这篇文章主要介绍p5.js如何绘制创意自画像,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
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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