| /* |
| 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.decompose"]){ |
| dojo._hasResource["dojox.gfx.decompose"]=true; |
| dojo.provide("dojox.gfx.decompose"); |
| dojo.require("dojox.gfx.matrix"); |
| (function(){ |
| var m=dojox.gfx.matrix; |
| var eq=function(a,b){ |
| return Math.abs(a-b)<=0.000001*(Math.abs(a)+Math.abs(b)); |
| }; |
| var _5=function(r1,m1,r2,m2){ |
| if(!isFinite(r1)){ |
| return r2; |
| }else{ |
| if(!isFinite(r2)){ |
| return r1; |
| } |
| } |
| m1=Math.abs(m1),m2=Math.abs(m2); |
| return (m1*r1+m2*r2)/(m1+m2); |
| }; |
| var _a=function(_b){ |
| var M=new m.Matrix2D(_b); |
| return dojo.mixin(M,{dx:0,dy:0,xy:M.yx,yx:M.xy}); |
| }; |
| var _d=function(_e){ |
| return (_e.xx*_e.yy<0||_e.xy*_e.yx>0)?-1:1; |
| }; |
| var _f=function(_10){ |
| var M=m.normalize(_10),b=-M.xx-M.yy,c=M.xx*M.yy-M.xy*M.yx,d=Math.sqrt(b*b-4*c),l1=-(b+(b<0?-d:d))/2,l2=c/l1,vx1=M.xy/(l1-M.xx),vy1=1,vx2=M.xy/(l2-M.xx),vy2=1; |
| if(eq(l1,l2)){ |
| vx1=1,vy1=0,vx2=0,vy2=1; |
| } |
| if(!isFinite(vx1)){ |
| vx1=1,vy1=(l1-M.xx)/M.xy; |
| if(!isFinite(vy1)){ |
| vx1=(l1-M.yy)/M.yx,vy1=1; |
| if(!isFinite(vx1)){ |
| vx1=1,vy1=M.yx/(l1-M.yy); |
| } |
| } |
| } |
| if(!isFinite(vx2)){ |
| vx2=1,vy2=(l2-M.xx)/M.xy; |
| if(!isFinite(vy2)){ |
| vx2=(l2-M.yy)/M.yx,vy2=1; |
| if(!isFinite(vx2)){ |
| vx2=1,vy2=M.yx/(l2-M.yy); |
| } |
| } |
| } |
| var d1=Math.sqrt(vx1*vx1+vy1*vy1),d2=Math.sqrt(vx2*vx2+vy2*vy2); |
| if(!isFinite(vx1/=d1)){ |
| vx1=0; |
| } |
| if(!isFinite(vy1/=d1)){ |
| vy1=0; |
| } |
| if(!isFinite(vx2/=d2)){ |
| vx2=0; |
| } |
| if(!isFinite(vy2/=d2)){ |
| vy2=0; |
| } |
| return {value1:l1,value2:l2,vector1:{x:vx1,y:vy1},vector2:{x:vx2,y:vy2}}; |
| }; |
| var _1d=function(M,_1f){ |
| var _20=_d(M),a=_1f.angle1=(Math.atan2(M.yx,M.yy)+Math.atan2(-_20*M.xy,_20*M.xx))/2,cos=Math.cos(a),sin=Math.sin(a); |
| _1f.sx=_5(M.xx/cos,cos,-M.xy/sin,sin); |
| _1f.sy=_5(M.yy/cos,cos,M.yx/sin,sin); |
| return _1f; |
| }; |
| var _24=function(M,_26){ |
| var _27=_d(M),a=_26.angle2=(Math.atan2(_27*M.yx,_27*M.xx)+Math.atan2(-M.xy,M.yy))/2,cos=Math.cos(a),sin=Math.sin(a); |
| _26.sx=_5(M.xx/cos,cos,M.yx/sin,sin); |
| _26.sy=_5(M.yy/cos,cos,-M.xy/sin,sin); |
| return _26; |
| }; |
| dojox.gfx.decompose=function(_2b){ |
| var M=m.normalize(_2b),_2d={dx:M.dx,dy:M.dy,sx:1,sy:1,angle1:0,angle2:0}; |
| if(eq(M.xy,0)&&eq(M.yx,0)){ |
| return dojo.mixin(_2d,{sx:M.xx,sy:M.yy}); |
| } |
| if(eq(M.xx*M.yx,-M.xy*M.yy)){ |
| return _1d(M,_2d); |
| } |
| if(eq(M.xx*M.xy,-M.yx*M.yy)){ |
| return _24(M,_2d); |
| } |
| var MT=_a(M),u=_f([M,MT]),v=_f([MT,M]),U=new m.Matrix2D({xx:u.vector1.x,xy:u.vector2.x,yx:u.vector1.y,yy:u.vector2.y}),VT=new m.Matrix2D({xx:v.vector1.x,xy:v.vector1.y,yx:v.vector2.x,yy:v.vector2.y}),S=new m.Matrix2D([m.invert(U),M,m.invert(VT)]); |
| _1d(VT,_2d); |
| S.xx*=_2d.sx; |
| S.yy*=_2d.sy; |
| _24(U,_2d); |
| S.xx*=_2d.sx; |
| S.yy*=_2d.sy; |
| return dojo.mixin(_2d,{sx:S.xx,sy:S.yy}); |
| }; |
| })(); |
| } |
