【成图】

【Canvas与卡通】手提箱简图_手提箱

【Canvas与卡通】手提箱简图_手提箱_02

【Canvas与卡通】手提箱简图_canvas_03

【Canvas与卡通】手提箱简图_canvas_04

【Canvas与卡通】手提箱简图_canvas_05

【代码】

<!DOCTYPE html>
<html lang="utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<head><title>手提箱 Draft1</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(0,34,54)";ctx.fillRect(-WIDTH/2,-HEIGHT/2,WIDTH,HEIGHT);ctx.restore();const R=220;//基准尺寸// #1 箱体ctx.save();    var r=R*1.00;var w=2*r;var h=w/1.6;var center=createPt(0,0);ctx.fillStyle="white";// 箱体drawRoundRect(ctx,center.x,center.y,w,h,r/8);ctx.fill();var leftBeltCenter=createPt2(center.x,center.y,w/3,Math.PI);// 左带ctx.fillStyle="rgb(0,34,54)";drawRect(ctx,leftBeltCenter.x,leftBeltCenter.y,r/20,h);ctx.fill();var rightBeltCenter=createPt2(center.x,center.y,w/3,0);// 右带ctx.fillStyle="rgb(0,34,54)";drawRect(ctx,rightBeltCenter.x,rightBeltCenter.y,r/20,h);ctx.fill();ctx.restore();// #2 底座ctx.save();    var bottomCenter=createPt2(center.x,center.y,h/2+r*0.045,Math.PI/2);// 底板ctx.fillStyle="white";drawRect(ctx,bottomCenter.x,bottomCenter.y,w*0.8,r*0.05);ctx.fill();var leftWheelCenter=createPt2(bottomCenter.x,bottomCenter.y+r*0.045,w*0.32,Math.PI);// 左轮var radius=r*0.1;var a=createPt2(leftWheelCenter.x,leftWheelCenter.y,radius,Math.PI);ctx.fillStyle="white";ctx.beginPath();ctx.moveTo(a.x,a.y);ctx.arc(leftWheelCenter.x,leftWheelCenter.y,radius,Math.PI,0,true);ctx.closePath();ctx.fill();ctx.restore();var rightWheelCenter=createPt2(bottomCenter.x,bottomCenter.y+r*0.045,w*0.32,0);// 右轮var radius=r*0.1;var a=createPt2(rightWheelCenter.x,rightWheelCenter.y,radius,Math.PI);ctx.fillStyle="white";ctx.beginPath();ctx.moveTo(a.x,a.y);ctx.arc(rightWheelCenter.x,rightWheelCenter.y,radius,Math.PI,0,true);ctx.closePath();ctx.fill();ctx.restore();// #3 提手ctx.save();    var bigHandlerCenter=createPt2(center.x,center.y,h/2+r*0.015,-Math.PI/2);// 大提手中心//drawSolidCircle(ctx,bigHandlerCenter.x,bigHandlerCenter.y,3,"red");var radius=r*0.25;var a=createPt2(bigHandlerCenter.x,bigHandlerCenter.y,radius,Math.PI);var curveStart=a;// 取标签起点ctx.fillStyle="white";ctx.beginPath();ctx.moveTo(a.x,a.y);ctx.arc(bigHandlerCenter.x,bigHandlerCenter.y,radius,Math.PI,0,false);ctx.closePath();ctx.fill();var smallHandlerCenter=createPt2(bigHandlerCenter.x,bigHandlerCenter.y,r*0.025,-Math.PI/2);// 小提手中心//drawSolidCircle(ctx,smallHandlerCenter.x,smallHandlerCenter.y,3,"red");var radius=r*0.18;var a=createPt2(smallHandlerCenter.x,smallHandlerCenter.y,radius,Math.PI);ctx.fillStyle="rgb(0,34,54)";ctx.beginPath();ctx.moveTo(a.x,a.y);ctx.arc(smallHandlerCenter.x,smallHandlerCenter.y,radius,Math.PI,0,false);ctx.closePath();ctx.fill();//drawSolidCircle(ctx,curveStart.x,curveStart.y,3,"red");var curveEnd=createPt2(curveStart.x,curveStart.y,r*0.2,Math.PI-Math.PI/4);//drawSolidCircle(ctx,curveEnd.x,curveEnd.y,3,"blue");var ctrl=createPt(curveEnd.x,curveStart.y);ctx.strokeStyle="rgb(0,34,54)";// 标签绳ctx.lineWidth=R/220*2;ctx.beginPath();ctx.moveTo(curveStart.x,curveStart.y);ctx.quadraticCurveTo(ctrl.x,ctrl.y,curveEnd.x,curveEnd.y);ctx.stroke();var lableW=w/8;// 标签var lableH=h/10;var theta=Math.PI/3;var a=createPt2(curveEnd.x,curveEnd.y,lableW,theta);var b=createPt2(a.x,a.y,lableH,theta+Math.PI/2);var c=createPt2(b.x,b.y,lableW,theta+Math.PI);ctx.fillStyle="rgb(0,34,54)";ctx.beginPath();ctx.moveTo(curveEnd.x,curveEnd.y);ctx.lineTo(a.x,a.y);ctx.lineTo(b.x,b.y);ctx.lineTo(c.x,c.y);ctx.closePath();ctx.fill();ctx.restore();writeText(ctx,WIDTH/2-30,HEIGHT/2-5,"逆火制图","8px consolas","lightgrey");// 版权}
}/*----------------------------------------------------------
函数:用于绘制圆角矩形
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
radius:圆角半径
----------------------------------------------------------*/
function drawRoundRect(ctx,x,y,width,height,radius){ctx.beginPath();ctx.moveTo(x-width/2+radius,y-height/2);ctx.lineTo(x+width/2-radius,y-height/2);ctx.arcTo(x+width/2,y-height/2,x+width/2,y-height/2+radius,radius);ctx.lineTo(x+width/2,y-height/2+radius);ctx.lineTo(x+width/2,y+height/2-radius);ctx.arcTo(x+width/2,y+height/2,x+width/2-radius,y+height/2,radius);ctx.lineTo(x+width/2-radius,y+height/2);ctx.lineTo(x-width/2+radius,y+height/2);ctx.arcTo(x-width/2,y+height/2,x-width/2,y+height/2-radius,radius);ctx.lineTo(x-width/2,y+height/2-radius);ctx.lineTo(x-width/2,y-height/2+radius);ctx.arcTo(x-width/2,y-height/2,x-width/2+radius,y-height/2,radius);ctx.closePath();
}/*----------------------------------------------------------
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();
}/*----------------------------------------------------------
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();
}/*----------------------------------------------------------
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;
}/*----------------------------------------------------------
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;
}/*----------------------------------------------------------
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();} 
}/*----------------------------------------------------------
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();
}/*-------------------------------------------------------------
我们不能随便生气，
生气的时候，你会使出真本领，
这样别人就会知道你的真本领很烂。
----阿拉伯民间谚语
--------------------------------------------------------------*/
//-->
</script>

END