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2 lines
6.6 KiB
JavaScript
2 lines
6.6 KiB
JavaScript
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Kinetic.Path=function(a){this._initPath(a)},Kinetic.Path.prototype={_initPath:function(a){this.shapeType="Path",this.dataArray=[];var b=this;a.drawFunc=this.drawFunc,Kinetic.Shape.call(this,a),this.dataArray=Kinetic.Path.parsePathData(this.attrs.data),this.on("dataChange",function(){b.dataArray=Kinetic.Path.parsePathData(b.attrs.data)})},drawFunc:function(a){var b=this.dataArray;a.beginPath();for(var c=0;c<b.length;c++){var d=b[c].command,e=b[c].points;switch(d){case"L":a.lineTo(e[0],e[1]);break;case"M":a.moveTo(e[0],e[1]);break;case"C":a.bezierCurveTo(e[0],e[1],e[2],e[3],e[4],e[5]);break;case"Q":a.quadraticCurveTo(e[0],e[1],e[2],e[3]);break;case"A":var f=e[0],g=e[1],h=e[2],i=e[3],j=e[4],k=e[5],l=e[6],m=e[7],n=h>i?h:i,o=h>i?1:h/i,p=h>i?i/h:1;a.translate(f,g),a.rotate(l),a.scale(o,p),a.arc(0,0,n,j,j+k,1-m),a.scale(1/o,1/p),a.rotate(-l),a.translate(-f,-g);break;case"z":a.closePath()}}this.fill(a),this.stroke(a)}},Kinetic.Global.extend(Kinetic.Path,Kinetic.Shape),Kinetic.Path.getLineLength=function(a,b,c,d){return Math.sqrt((c-a)*(c-a)+(d-b)*(d-b))},Kinetic.Path.getPointOnLine=function(a,b,c,d,e,f,g){f===undefined&&(f=b),g===undefined&&(g=c);var h=(e-c)/(d-b+1e-8),i=Math.sqrt(a*a/(1+h*h));d<b&&(i*=-1);var j=h*i,k;if((g-c)/(f-b+1e-8)===h)k={x:f+i,y:g+j};else{var l,m,n=this.getLineLength(b,c,d,e);if(n<1e-8)return undefined;var o=(f-b)*(d-b)+(g-c)*(e-c);o/=n*n,l=b+o*(d-b),m=c+o*(e-c);var p=this.getLineLength(f,g,l,m),q=Math.sqrt(a*a-p*p);i=Math.sqrt(q*q/(1+h*h)),d<b&&(i*=-1),j=h*i,k={x:l+i,y:m+j}}return k},Kinetic.Path.getPointOnCubicBezier=function(a,b,c,d,e,f,g,h,i){function j(a){return a*a*a}function k(a){return 3*a*a*(1-a)}function l(a){return 3*a*(1-a)*(1-a)}function m(a){return(1-a)*(1-a)*(1-a)}var n=h*j(a)+f*k(a)+d*l(a)+b*m(a),o=i*j(a)+g*k(a)+e*l(a)+c*m(a);return{x:n,y:o}},Kinetic.Path.getPointOnQuadraticBezier=function(a,b,c,d,e,f,g){function h(a){return a*a}function i(a){return 2*a*(1-a)}function j(a){return(1-a)*(1-a)}var k=f*h(a)+d*i(a)+b*j(a),l=g*h(a)+e*i(a)+c*j(a);return{x:k,y:l}},Kinetic.Path.getPointOnEllipticalArc=function(a,b,c,d,e,f){var g=Math.cos(f),h=Math.sin(f),i={x:c*Math.cos(e),y:d*Math.sin(e)};return{x:a+(i.x*g-i.y*h),y:b+(i.x*h+i.y*g)}},Kinetic.Path.parsePathData=function(a){if(!a)return[];var b=a,c=["m","M","l","L","v","V","h","H","z","Z","c","C","q","Q","t","T","s","S","a","A"];b=b.replace(new RegExp(" ","g"),",");for(var d=0;d<c.length;d++)b=b.replace(new RegExp(c[d],"g"),"|"+c[d]);var e=b.split("|"),f=[],g=0,h=0;for(var d=1;d<e.length;d++){var i=e[d],j=i.charAt(0);i=i.slice(1),i=i.replace(new RegExp(",-","g"),"-"),i=i.replace(new RegExp("-","g"),",-"),i=i.replace(new RegExp("e,-","g"),"e-");var k=i.split(",");k.length>0&&k[0]===""&&k.shift();for(var l=0;l<k.length;l++)k[l]=parseFloat(k[l]);while(k.length>0){if(isNaN(k[0]))break;var m=null,n=[],o=g,p=h;switch(j){case"l":g+=k.shift(),h+=k.shift(),m="L",n.push(g,h);break;case"L":g=k.shift(),h=k.shift(),n.push(g,h);break;case"m":g+=k.shift(),h+=k.shift(),m="M",n.push(g,h),j="l";break;case"M":g=k.shift(),h=k.shift(),m="M",n.push(g,h),j="L";break;case"h":g+=k.shift(),m="L",n.push(g,h);break;case"H":g=k.shift(),m="L",n.push(g,h);break;case"v":h+=k.shift(),m="L",n.push(g,h);break;case"V":h=k.shift(),m="L",n.push(g,h);break;case"C":n.push(k.shift(),k.shift(),k.shift(),k.shift()),g=k.shift(),h=k.shift(),n.push(g,h);break;case"c":n.push(g+k.shift(),h+k.shift(),g+k.shift(),h+k.shift()),g+=k.shift(),h+=k.shift(),m="C",n.push(g,h);break;case"S":var q=g,r=h,s=f[f.length-1];s.command==="C"&&(q=g+(g-s.points[2]),r=h+(h-s.points[3])),n.push(q,r,k.shift(),k.shift()),g=k.shift(),h=k.shift(),m="C",n.push(g,h);break;case"s":var q=g,r=h,s=f[f.length-1];s.command==="C"&&(q=g+(g-s.points[2]),r=h+(h-s.points[3])),n.push(q,r,g+k.shift(),h+k.shift()),g+=k.shift(),h+=k.shift(),m="C",n.push(g,h);break;case"Q":n.push(k.shift(),k.shift()),g=k.shift(),h=k.shift(),n.push(g,h);break;case"q":n.push(g+k.shift(),h+k.shift()),g+=k.shift(),h+=k.shift(),m="Q",n.push(g,h);break;case"T":var q=g,r=h,s=f[f.length-1];s.command==="Q"&&(q=g+(g-s.points[0]),r=h+(h-s.points[1])),g=k.shift(),h=k.
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