【Canvas与卡通】Niko卡通骷髅头

【成图】

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【代码】

<!DOCTYPE html>
<html lang="utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<head>
     <title>niko骷髅头 Draft7</title>
     <style type="text/css">
     .centerlize{
        margin:0 auto;
        width:1200px;
     }
     </style>
     </head>

     <body onload="init();">
        <div class="centerlize">
            <canvas id="myCanvas" width="12px" height="12px" style="border:1px dotted black;">
                如果看到这段文字说您的浏览器尚不支持HTML5 Canvas，请更换浏览器再试.
            </canvas>
        </div>
     </body>
</html>
<script type="text/javascript">
<!--
/*****************************************************************
* 将全体代码(从<!DOCTYPE到script>)拷贝下来，粘贴到文本编辑器中，
* 另存为.html文件，再用chrome浏览器打开，就能看到实现效果。
******************************************************************/

// canvas的绘图环境
var ctx;

// 高宽
const WIDTH=512;
const HEIGHT=512;

// 舞台对象
var stage;

//-------------------------------
// 初始化
//-------------------------------
function init(){
    // 获得canvas对象
    var canvas=document.getElementById('myCanvas');  
    canvas.width=WIDTH;
    canvas.height=HEIGHT;

    // 初始化canvas的绘图环境
    ctx=canvas.getContext('2d');  
    ctx.translate(WIDTH/2,HEIGHT/2);// 原点平移

    // 准备
    stage=new Stage();    
    stage.init();

    // 开幕
    animate();
}

// 播放动画
function animate(){    
    stage.update();    
    stage.paintBg(ctx);
    stage.paintFg(ctx);     

    // 循环
    if(true){
        //sleep(100);
        window.requestAnimationFrame(animate);   
    }
}

// 舞台类
function Stage(){
    // 初始化
    this.init=function(){
        
    }

    // 更新
    this.update=function(){    
        
    }

    // 画背景
    this.paintBg=function(ctx){
        ctx.clearRect(-WIDTH/2,-HEIGHT/2,WIDTH,HEIGHT);// 清屏    
    }

    // 画前景
    this.paintFg=function(ctx){
        // 底色
        ctx.save();
        ctx.fillStyle = "rgb(116,116,116)";
        ctx.fillRect(-WIDTH/2,-HEIGHT/2,WIDTH,HEIGHT);
        ctx.restore();
        
        const R=220;//基准尺寸
        var ct=createPt(0,0);// ct=center

        // #1 外圈
        ctx.save();    
        var r=R*1.00;
        var w=2*r;
        var h=w*0.6;
        ctx.fillStyle="black";
        drawSkeleton(ctx,ct.x,ct.y,w,h,r/8);
        ctx.fill();
        ctx.restore();

        // #2 内圈
        ctx.save();    
        var r=R*1.00;
        w-=r*0.2;
        h-=r*0.1;
        ctx.fillStyle="white";
        drawSkeletonInner(ctx,ct.x,ct.y,w,h,r/8);
        ctx.fill();
        ctx.restore();

        // #3 左眼(按笔者方位)
        ctx.save();    
        var r=R*1.00;
        ctx.fillStyle="black";
        drawLeftEye(ctx,ct.x-r*0.4,ct.y+r*0.1,r*0.6,r*0.3,r/26);
        ctx.fill();
        ctx.restore();

        // #4 右眼(按笔者方位)
        ctx.save();    
        var r=R*1.00;
        ctx.fillStyle="black";
        drawRightEye(ctx,ct.x+r*0.4,ct.y+r*0.1,r*0.6,r*0.3,r/26);
        ctx.fill();
        ctx.restore();

        // #5 鼻子
        ctx.save();    
        var r=R*1.00;
        ctx.fillStyle="black";
        drawNose(ctx,ct.x,ct.y+r*0.3,r*0.4,r*0.2,r/16);
        ctx.fill();
        ctx.restore();

        // #6 牙齿
        ctx.save();    
        var r=R*1.00;
        ctx.fillStyle="black";
        drawTooth(ctx,ct.x,ct.y+r*0.62,r*0.1,r*0.2);// 中牙
        ctx.fill();
        ctx.fillStyle="black";
        drawTooth(ctx,ct.x-r*0.2,ct.y+r*0.62,r*0.1,r*0.2);// 左牙
        ctx.fill();
        ctx.fillStyle="black";
        drawTooth(ctx,ct.x+r*0.2,ct.y+r*0.62,r*0.1,r*0.2);// 右牙
        ctx.fill();
        ctx.restore();

        // #7 NIKO
        ctx.save();    
        var r=R*1.00;
        drawSkeletonInner(ctx,ct.x,ct.y,w,h,r/8);// 切图
        ctx.clip();        
        ctx.fillStyle="rgb(23,23,23)";
        drawRect(ctx,ct.x,ct.y-r*0.32,r*1.8,r*0.36);// 头巾
        ctx.fill();
        writeText(ctx,ct.x,ct.y-r*0.16,"N.I.K.O",r*0.32+"px Noto Sans SC Medium","white");
        ctx.restore();

        // #8 飘带
        ctx.save();    
        var r=R*1.00;    
        ctx.fillStyle="rgb(23,23,23)";
        drawBelt(ctx,ct.x+r*0.92,ct.y-r*0.42,r*0.36,r*0.16,r/20);// 头巾
        ctx.fill();
        ctx.fillStyle="rgb(23,23,23)";
        drawBelt(ctx,ct.x+r*0.98,ct.y-r*0.22,r*0.25,r*0.16,r/20);// 头巾
        ctx.fill();
        ctx.restore();
                
        writeText(ctx,WIDTH/2-30,HEIGHT/2-5,"逆火制图","8px consolas","lightgrey");// 版权
    }
}

// 画飘带
function drawBelt(ctx,x,y,w,h,round){
    var ct=createPt(x,y);
    var a=createPt(ct.x+w/2,ct.y-h/2);
    var b=createPt(ct.x+w/2,ct.y+h/2);
    var d=createPt(ct.x-w/2,ct.y-h/2);
    var c=createPt3(d,h/Math.cos(Math.PI/6),Math.PI/3);
    var a1=createPt3(a,round,Math.PI/2);
    var a2=createPt3(a,round,Math.PI);
    var b1=createPt3(b,round,Math.PI);
    var b2=createPt3(b,round,-Math.PI/2);
    var c1=createPt3(c,round,Math.PI+Math.PI/3);
    var c2=createPt3(c,round,0);
    var d1=createPt3(d,round,0);
    var d2=createPt3(d,round,Math.PI/3);

    ctx.beginPath();
    ctx.moveTo(a2.x,a2.y);
    ctx.quadraticCurveTo(a.x,a.y,a1.x,a1.y);
    ctx.lineTo(b2.x,b2.y);
    ctx.quadraticCurveTo(b.x,b.y,b1.x,b1.y);
    ctx.lineTo(c2.x,c2.y);
    ctx.quadraticCurveTo(c.x,c.y,c1.x,c1.y);
    ctx.lineTo(d2.x,d2.y);
    ctx.quadraticCurveTo(d.x,d.y,d1.x,d1.y);
    ctx.closePath();
}

// 画一个牙齿
function drawTooth(ctx,x,y,w,h){
    var ct=createPt(x,y);
    var a=createPt(ct.x,ct.y-h/2);
    var b=createPt3(a,w/Math.sqrt(2),Math.PI/4);
    var e=createPt3(a,w/Math.sqrt(2),Math.PI/4*3);
    var c=createPt(ct.x+w/2,ct.y+h/2);
    var d=createPt(ct.x-w/2,ct.y+h/2);

    ctx.beginPath();
    ctx.moveTo(a.x,a.y);
    ctx.lineTo(b.x,b.y);
    ctx.lineTo(c.x,c.y);
    ctx.lineTo(d.x,d.y);
    ctx.lineTo(e.x,e.y);
    ctx.closePath();
}

function drawNose(ctx,x,y,w,h,round){
    var ct=createPt(x,y);
    var a=createPt(ct.x,ct.y-h/2);
    var b=createPt(ct.x+w/2,ct.y+h/2);
    var c=createPt(ct.x-w/2,ct.y+h/2);
    var theta=Math.atan(Math.abs((b.y-a.y)/(b.x-a.x)));// 加绝对值利于算加减
    var a1=createPt(a.x+round*Math.cos(theta),a.y+round*Math.sin(theta));
    var a2=createPt(a.x-round*Math.cos(theta),a.y+round*Math.sin(theta));
    var b1=createPt(b.x-round,b.y);
    var b2=createPt(b.x-round*Math.cos(theta),b.y-round*Math.sin(theta));
    var c2=createPt(c.x+round,c.y);
    var c1=createPt(c.x+round*Math.cos(theta),c.y-round*Math.sin(theta));

    ctx.beginPath();
    ctx.moveTo(a2.x,a2.y);
    ctx.quadraticCurveTo(a.x,a.y,a1.x,a1.y);    
    ctx.lineTo(b2.x,b2.y);
    ctx.quadraticCurveTo(b.x,b.y,b1.x,b1.y);    
    ctx.lineTo(c2.x,c2.y);
    ctx.quadraticCurveTo(c.x,c.y,c1.x,c1.y);
    ctx.closePath();
}

function drawLeftEye(ctx,x,y,w,h,round){
    var ct=createPt(x,y);
    var a=createPt(ct.x+w/2,ct.y-h/2);
    var a1=createPt3(a,round,Math.PI/2);
    var a2=createPt3(a,round,Math.PI);
    var f=createPt3(a,w*0.8,Math.PI);
    var b=createPt3(a,h/2,Math.PI/2);
    var b1=createPt3(b,round,Math.PI/4*3);
    var b2=createPt3(b,round,-Math.PI/2);
    var c=createPt3(b,h/Math.sqrt(2),Math.PI/4*3);
    var c1=createPt3(c,round,Math.PI);
    var c2=createPt3(c,round,-Math.PI/4);
    var d=createPt3(c,w*0.5,Math.PI);
    var d1=createPt3(d,round,Math.PI+Math.PI/3);
    var d2=createPt3(d,round,0);
    var e=createPt3(d,h*0.8,Math.PI+Math.PI/3);
    var theta=Math.atan(Math.abs((f.y-e.y)/(f.x-e.x)));// 加绝对值利于算加减
    var e1=createPt(e.x+round*Math.cos(theta),e.y-round*Math.sin(theta));
    var e2=createPt3(e,round,Math.PI/3);    

    ctx.beginPath();
    ctx.moveTo(a2.x,a2.y);
    ctx.quadraticCurveTo(a.x,a.y,a1.x,a1.y);
    ctx.lineTo(b2.x,b2.y);
    ctx.quadraticCurveTo(b.x,b.y,b1.x,b1.y);
    ctx.lineTo(c2.x,c2.y);
    ctx.quadraticCurveTo(c.x,c.y,c1.x,c1.y);
    ctx.lineTo(d2.x,d2.y);
    ctx.quadraticCurveTo(d.x,d.y,d1.x,d1.y);
    ctx.lineTo(e2.x,e2.y);
    ctx.quadraticCurveTo(e.x,e.y,e1.x,e1.y);
    ctx.lineTo(f.x,f.y);
    ctx.closePath();
}

function drawRightEye(ctx,x,y,w,h,round){
    var ct=createPt(x,y);

    var a=createPt(ct.x-w/2,ct.y-h/2);
    var a1=createPt3(a,round,Math.PI/2);
    var a2=createPt3(a,round,0);
    var f=createPt3(a,w*0.8,0);
    var b=createPt3(a,h/2,Math.PI/2);
    var b1=createPt3(b,round,Math.PI/4);
    var b2=createPt3(b,round,-Math.PI/2);
    var c=createPt3(b,h/Math.sqrt(2),Math.PI/4);
    var c1=createPt3(c,round,0);
    var c2=createPt3(c,round,Math.PI+Math.PI/4);
    var d=createPt3(c,w*0.5,0);
    var d1=createPt3(d,round,-Math.PI/3);
    var d2=createPt3(d,round,Math.PI);
    var e=createPt3(d,h*0.8,-Math.PI/3);
    var theta=Math.atan(Math.abs((f.y-e.y)/(f.x-e.x)));
    var e1=createPt(e.x-round*Math.cos(theta),e.y-round*Math.sin(theta));
    var e2=createPt3(e,round,Math.PI/3*2);    

    ctx.beginPath();
    ctx.moveTo(a2.x,a2.y);
    ctx.quadraticCurveTo(a.x,a.y,a1.x,a1.y);
    ctx.lineTo(b2.x,b2.y);
    ctx.quadraticCurveTo(b.x,b.y,b1.x,b1.y);
    ctx.lineTo(c2.x,c2.y);
    ctx.quadraticCurveTo(c.x,c.y,c1.x,c1.y);
    ctx.lineTo(d2.x,d2.y);
    ctx.quadraticCurveTo(d.x,d.y,d1.x,d1.y);
    ctx.lineTo(e2.x,e2.y);
    ctx.quadraticCurveTo(e.x,e.y,e1.x,e1.y);
    ctx.lineTo(f.x,f.y);
    ctx.closePath();
}

// 绘制骷髅头轮廓(内圈)
function drawSkeletonInner(ctx,x,y,w,h,round){
    var ct=createPt(x,y);

    var a=createPt3(ct,w/2,0);
    var a1=createPt3(a,round,getRadian(110));
    var a2=createPt3(a,round,-getRadian(120));
    var b=createPt3(a,w*0.22,getRadian(110));
    var b1=createPt3(b,round,Math.PI);
    var b2=createPt3(b,round,-getRadian(70));
    var c=createPt3(b,w*0.23,Math.PI);
    var c2=createPt3(c,round,0);
    var c1=createPt3(c,round,Math.PI/2);
    var d=createPt3(c,w*0.19,Math.PI/2);
    var d1=createPt3(d,round,Math.PI);
    var d2=createPt3(d,round,-Math.PI/2);
    var j=createPt3(a,w*0.4,-getRadian(120));
    var j1=createPt3(j,round,getRadian(60));
    var j2=createPt3(j,round,Math.PI);
    var h=createPt3(ct,w/2,Math.PI);
    var h1=createPt3(h,round,-getRadian(60));
    var h2=createPt3(h,round,getRadian(70));
    var g=createPt3(h,w*0.22,getRadian(70));
    var g1=createPt3(g,round,Math.PI+getRadian(70));
    var g2=createPt3(g,round,0);
    var f=createPt3(g,w*0.23,0);
    var f1=createPt3(f,round,Math.PI);
    var f2=createPt3(f,round,Math.PI/2);
    var e=createPt3(f,w*0.19,Math.PI/2);
    var e1=createPt3(e,round,-Math.PI/2);
    var e2=createPt3(e,round,0);
    var i=createPt3(h,w*0.4,-getRadian(60));
    var i1=createPt3(i,round,0);
    var i2=createPt3(i,round,getRadian(120));

    ctx.beginPath();
    ctx.moveTo(a2.x,a2.y);
    ctx.quadraticCurveTo(a.x,a.y,a1.x,a1.y);
    ctx.lineTo(b2.x,b2.y);
    ctx.quadraticCurveTo(b.x,b.y,b1.x,b1.y);
    ctx.lineTo(c2.x,c2.y);
    ctx.quadraticCurveTo(c.x,c.y,c1.x,c1.y);
    ctx.lineTo(d.x,d.y);
    //ctx.quadraticCurveTo(d.x,d.y,d1.x,d1.y);
    ctx.lineTo(e.x,e.y);
    //ctx.quadraticCurveTo(e.x,e.y,e1.x,e1.y);
    ctx.lineTo(f2.x,f2.y);
    ctx.quadraticCurveTo(f.x,f.y,f1.x,f1.y);
    ctx.lineTo(g2.x,g2.y);
    ctx.quadraticCurveTo(g.x,g.y,g1.x,g1.y);
    ctx.lineTo(h2.x,h2.y);
    ctx.quadraticCurveTo(h.x,h.y,h1.x,h1.y);
    ctx.lineTo(i2.x,i2.y);
    ctx.quadraticCurveTo(i.x,i.y,i1.x,i1.y);
    ctx.lineTo(j2.x,j2.y);
    ctx.quadraticCurveTo(j.x,j.y,j1.x,j1.y);
    ctx.closePath();
}

// 绘制骷髅头轮廓
function drawSkeleton(ctx,x,y,w,h,round){
    var ct=createPt(x,y);

    var a=createPt3(ct,w/2,0);
    var a1=createPt3(a,round,getRadian(110));
    var a2=createPt3(a,round,-getRadian(120));
    var b=createPt3(a,w/4,getRadian(110));
    var b1=createPt3(b,round,Math.PI);
    var b2=createPt3(b,round,-getRadian(70));
    var c=createPt3(b,w/5,Math.PI);
    var c2=createPt3(c,round,0);
    var c1=createPt3(c,round,Math.PI/2);
    var d=createPt3(c,w/6,Math.PI/2);
    var d1=createPt3(d,round,Math.PI);
    var d2=createPt3(d,round,-Math.PI/2);
    var j=createPt3(a,w*0.4,-getRadian(120));
    var j1=createPt3(j,round,getRadian(60));
    var j2=createPt3(j,round,Math.PI);
    var h=createPt3(ct,w/2,Math.PI);
    var h1=createPt3(h,round,-getRadian(60));
    var h2=createPt3(h,round,getRadian(70));
    var g=createPt3(h,w/4,getRadian(70));
    var g1=createPt3(g,round,Math.PI+getRadian(70));
    var g2=createPt3(g,round,0);
    var f=createPt3(g,w/5,0);
    var f1=createPt3(f,round,Math.PI);
    var f2=createPt3(f,round,Math.PI/2);
    var e=createPt3(f,w/6,Math.PI/2);
    var e1=createPt3(e,round,-Math.PI/2);
    var e2=createPt3(e,round,0);
    var i=createPt3(h,w*0.4,-getRadian(60));
    var i1=createPt3(i,round,0);
    var i2=createPt3(i,round,getRadian(120));

    ctx.beginPath();
    ctx.moveTo(a2.x,a2.y);
    ctx.quadraticCurveTo(a.x,a.y,a1.x,a1.y);
    ctx.lineTo(b2.x,b2.y);
    ctx.quadraticCurveTo(b.x,b.y,b1.x,b1.y);
    ctx.lineTo(c2.x,c2.y);
    ctx.quadraticCurveTo(c.x,c.y,c1.x,c1.y);
    ctx.lineTo(d2.x,d2.y);
    ctx.quadraticCurveTo(d.x,d.y,d1.x,d1.y);
    ctx.lineTo(e2.x,e2.y);
    ctx.quadraticCurveTo(e.x,e.y,e1.x,e1.y);
    ctx.lineTo(f2.x,f2.y);
    ctx.quadraticCurveTo(f.x,f.y,f1.x,f1.y);
    ctx.lineTo(g2.x,g2.y);
    ctx.quadraticCurveTo(g.x,g.y,g1.x,g1.y);
    ctx.lineTo(h2.x,h2.y);
    ctx.quadraticCurveTo(h.x,h.y,h1.x,h1.y);
    ctx.lineTo(i2.x,i2.y);
    ctx.quadraticCurveTo(i.x,i.y,i1.x,i1.y);
    ctx.lineTo(j2.x,j2.y);
    ctx.quadraticCurveTo(j.x,j.y,j1.x,j1.y);
    ctx.closePath();
}

/*----------------------------------------------------------
基础函数:用于从角度取得弧度，便于微调
degree:角度值，如30，60，90
返回值:弧度值，如PI/6,PI/3,PI/2
----------------------------------------------------------*/
function getRadian(degree){
    return degree/180*Math.PI;
}

/*----------------------------------------------------------
基础函数:用于取得两点间距离
p1:起点
p1:终点
----------------------------------------------------------*/
function getDistance(p1,p2){
    return Math.sqrt((p1.x-p2.x)*(p1.x-p2.x)+(p1.y-p2.y)*(p1.y-p2.y));
}

/*----------------------------------------------------------
基础函数:用于绘制矩形
ctx:绘图上下文
x:矩形中心横坐标
y:矩形中心纵坐标
width:矩形宽
height:矩形高
----------------------------------------------------------*/
function drawRect(ctx,x,y,width,height){
    ctx.beginPath();
    ctx.moveTo(x-width/2,y-height/2);
    ctx.lineTo(x+width/2,y-height/2);
    ctx.lineTo(x+width/2,y+height/2);
    ctx.lineTo(x-width/2,y+height/2);
    ctx.closePath();
}

/*----------------------------------------------------------
基础函数:用于绘制实心圆
ctx:绘图上下文
x:矩形中心横坐标
y:矩形中心纵坐标
r:圆半径
style:填充圆的方案
----------------------------------------------------------*/
function drawSolidCircle(ctx,x,y,r,style){
    ctx.fillStyle=style;
    ctx.beginPath();
    ctx.arc(x,y,r,0,Math.PI*2,false);
    ctx.closePath();
    ctx.fill();
}

/*----------------------------------------------------------
基础函数:创建一个二维坐标点
base:基准点,入参必需有x和y两参数
radius:当前点到基准点的距离
theta:当前点到基准点的角度
Pt即Point
----------------------------------------------------------*/
function createPt3(base,radius,theta){
    var retval={};
    retval.x=base.x+radius*Math.cos(theta);
    retval.y=base.y+radius*Math.sin(theta);
    return retval;
}

/*----------------------------------------------------------
基础函数:创建一个二维坐标点
baseX:基准点横坐标
baseY:基准点纵坐标
radius:当前点到基准点的距离
theta:当前点到基准点的角度
Pt即Point
----------------------------------------------------------*/
function createPt2(baseX,baseY,radius,theta){
    var retval={};
    retval.x=baseX+radius*Math.cos(theta);
    retval.y=baseY+radius*Math.sin(theta);
    return retval;
}

/*----------------------------------------------------------
基础函数:创建一个二维坐标点
x:横坐标
y:纵坐标
Pt即Point
----------------------------------------------------------*/
function createPt(x,y){
    var retval={};
    retval.x=x;
    retval.y=y;
    return retval;
}

/*----------------------------------------------------------
基础函数:延时若干毫秒
milliseconds:毫秒数
----------------------------------------------------------*/
function sleep(milliSeconds) {
    const date = Date.now();
    let currDate = null;
    while (currDate - date < milliSeconds) {
        currDate = Date.now();
    } 
}

/*----------------------------------------------------------
基础函数:书写文字
ctx:绘图上下文
x:横坐标
y:纵坐标
text:文字
font:字体
color:颜色
----------------------------------------------------------*/
function writeText(ctx,x,y,text,font,color){
    ctx.save();
    ctx.textBaseline="bottom";
    ctx.textAlign="center";
    ctx.font = font;
    ctx.fillStyle=color;
    ctx.fillText(text,x,y);
    ctx.restore();
}

/*-------------------------------------------------------------
此图比旗帜徽章繁难，几乎每个轮廓都要绘制调整。
--------------------------------------------------------------*/
//-->
</script>

END

posted @ 2021-12-15 20:55  逆火狂飙  阅读(762)  评论(0)    收藏  举报
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