| /* |
| Copyright (c) 2004-2009, The Dojo Foundation All Rights Reserved. |
| Available via Academic Free License >= 2.1 OR the modified BSD license. |
| see: http://dojotoolkit.org/license for details |
| */ |
| |
| |
| if(!dojo._hasResource["dojox.gfx.arc"]){ |
| dojo._hasResource["dojox.gfx.arc"]=true; |
| dojo.provide("dojox.gfx.arc"); |
| dojo.require("dojox.gfx.matrix"); |
| (function(){ |
| var m=dojox.gfx.matrix,_1=function(_2){ |
| var _3=Math.cos(_2),_4=Math.sin(_2),p2={x:_3+(4/3)*(1-_3),y:_4-(4/3)*_3*(1-_3)/_4}; |
| return {s:{x:_3,y:-_4},c1:{x:p2.x,y:-p2.y},c2:p2,e:{x:_3,y:_4}}; |
| },_5=2*Math.PI,_6=Math.PI/4,_7=Math.PI/8,_8=_6+_7,_9=_1(_7); |
| dojo.mixin(dojox.gfx.arc,{unitArcAsBezier:_1,curvePI4:_9,arcAsBezier:function(_a,rx,ry,_b,_c,_d,x,y){ |
| _c=Boolean(_c); |
| _d=Boolean(_d); |
| var _e=m._degToRad(_b),_f=rx*rx,ry2=ry*ry,pa=m.multiplyPoint(m.rotate(-_e),{x:(_a.x-x)/2,y:(_a.y-y)/2}),_10=pa.x*pa.x,_11=pa.y*pa.y,c1=Math.sqrt((_f*ry2-_f*_11-ry2*_10)/(_f*_11+ry2*_10)); |
| if(isNaN(c1)){ |
| c1=0; |
| } |
| var ca={x:c1*rx*pa.y/ry,y:-c1*ry*pa.x/rx}; |
| if(_c==_d){ |
| ca={x:-ca.x,y:-ca.y}; |
| } |
| var c=m.multiplyPoint([m.translate((_a.x+x)/2,(_a.y+y)/2),m.rotate(_e)],ca); |
| var _12=m.normalize([m.translate(c.x,c.y),m.rotate(_e),m.scale(rx,ry)]); |
| var _13=m.invert(_12),sp=m.multiplyPoint(_13,_a),ep=m.multiplyPoint(_13,x,y),_14=Math.atan2(sp.y,sp.x),_15=Math.atan2(ep.y,ep.x),_16=_14-_15; |
| if(_d){ |
| _16=-_16; |
| } |
| if(_16<0){ |
| _16+=_5; |
| }else{ |
| if(_16>_5){ |
| _16-=_5; |
| } |
| } |
| var _17=_7,_18=_9,_19=_d?_17:-_17,_1a=[]; |
| for(var _1b=_16;_1b>0;_1b-=_6){ |
| if(_1b<_8){ |
| _17=_1b/2; |
| _18=_1(_17); |
| _19=_d?_17:-_17; |
| _1b=0; |
| } |
| var c1,c2,e,M=m.normalize([_12,m.rotate(_14+_19)]); |
| if(_d){ |
| c1=m.multiplyPoint(M,_18.c1); |
| c2=m.multiplyPoint(M,_18.c2); |
| e=m.multiplyPoint(M,_18.e); |
| }else{ |
| c1=m.multiplyPoint(M,_18.c2); |
| c2=m.multiplyPoint(M,_18.c1); |
| e=m.multiplyPoint(M,_18.s); |
| } |
| _1a.push([c1.x,c1.y,c2.x,c2.y,e.x,e.y]); |
| _14+=2*_19; |
| } |
| return _1a; |
| }}); |
| })(); |
| } |