root / trunk / web / dojo / dojox / gfx / matrix.js @ 11
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/*
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Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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Available via Academic Free License >= 2.1 OR the modified BSD license.
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see: http://dojotoolkit.org/license for details
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*/
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if(!dojo._hasResource["dojox.gfx.matrix"]){ |
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dojo._hasResource["dojox.gfx.matrix"]=true; |
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dojo.provide("dojox.gfx.matrix");
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(function(){
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var m=dojox.gfx.matrix;
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var _1={};
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m._degToRad=function(_2){ |
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return _1[_2]||(_1[_2]=(Math.PI*_2/180)); |
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}; |
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m._radToDeg=function(_3){ |
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return _3/Math.PI*180; |
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}; |
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m.Matrix2D=function(_4){ |
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if(_4){
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if(typeof _4=="number"){ |
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this.xx=this.yy=_4; |
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}else{
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if(_4 instanceof Array){ |
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if(_4.length>0){ |
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var _5=m.normalize(_4[0]); |
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for(var i=1;i<_4.length;++i){ |
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var l=_5,r=dojox.gfx.matrix.normalize(_4[i]);
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_5=new m.Matrix2D();
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_5.xx=l.xx*r.xx+l.xy*r.yx; |
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_5.xy=l.xx*r.xy+l.xy*r.yy; |
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_5.yx=l.yx*r.xx+l.yy*r.yx; |
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_5.yy=l.yx*r.xy+l.yy*r.yy; |
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_5.dx=l.xx*r.dx+l.xy*r.dy+l.dx; |
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_5.dy=l.yx*r.dx+l.yy*r.dy+l.dy; |
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} |
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dojo.mixin(this,_5);
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} |
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}else{
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dojo.mixin(this,_4);
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} |
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} |
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} |
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}; |
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dojo.extend(m.Matrix2D,{xx:1,xy:0,yx:0,yy:1,dx:0,dy:0});
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dojo.mixin(m,{identity:new m.Matrix2D(),flipX:new m.Matrix2D({xx:-1}),flipY:new m.Matrix2D({yy:-1}),flipXY:new m.Matrix2D({xx:-1,yy:-1}),translate:function(a,b){
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if(arguments.length>1){ |
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return new m.Matrix2D({dx:a,dy:b}); |
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} |
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return new m.Matrix2D({dx:a.x,dy:a.y}); |
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},scale:function(a,b){ |
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if(arguments.length>1){ |
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return new m.Matrix2D({xx:a,yy:b}); |
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} |
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if(typeof a=="number"){ |
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return new m.Matrix2D({xx:a,yy:a}); |
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} |
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return new m.Matrix2D({xx:a.x,yy:a.y}); |
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},rotate:function(_6){ |
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var c=Math.cos(_6);
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var s=Math.sin(_6);
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return new m.Matrix2D({xx:c,xy:-s,yx:s,yy:c}); |
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},rotateg:function(_7){ |
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return m.rotate(m._degToRad(_7));
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},skewX:function(_8){ |
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return new m.Matrix2D({xy:Math.tan(_8)}); |
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},skewXg:function(_9){ |
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return m.skewX(m._degToRad(_9));
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},skewY:function(_a){ |
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return new m.Matrix2D({yx:Math.tan(_a)}); |
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},skewYg:function(_b){ |
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return m.skewY(m._degToRad(_b));
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},reflect:function(a,b){ |
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if(arguments.length==1){ |
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b=a.y; |
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a=a.x; |
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} |
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var a2=a*a,b2=b*b,n2=a2+b2,xy=2*a*b/n2; |
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return new m.Matrix2D({xx:2*a2/n2-1,xy:xy,yx:xy,yy:2*b2/n2-1}); |
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},project:function(a,b){ |
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if(arguments.length==1){ |
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b=a.y; |
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a=a.x; |
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} |
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var a2=a*a,b2=b*b,n2=a2+b2,xy=a*b/n2;
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return new m.Matrix2D({xx:a2/n2,xy:xy,yx:xy,yy:b2/n2}); |
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},normalize:function(_c){ |
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return (_c instanceof m.Matrix2D)?_c:new m.Matrix2D(_c); |
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},clone:function(_d){ |
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var _e=new m.Matrix2D(); |
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for(var i in _d){ |
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if(typeof (_d[i])=="number"&&typeof (_e[i])=="number"&&_e[i]!=_d[i]){ |
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_e[i]=_d[i]; |
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} |
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} |
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return _e;
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},invert:function(_f){ |
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var M=m.normalize(_f),D=M.xx*M.yy-M.xy*M.yx,M=new m.Matrix2D({xx:M.yy/D,xy:-M.xy/D,yx:-M.yx/D,yy:M.xx/D,dx:(M.xy*M.dy-M.yy*M.dx)/D,dy:(M.yx*M.dx-M.xx*M.dy)/D}); |
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return M;
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},_multiplyPoint:function(_10,x,y){ |
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return {x:_10.xx*x+_10.xy*y+_10.dx,y:_10.yx*x+_10.yy*y+_10.dy}; |
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},multiplyPoint:function(_11,a,b){ |
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var M=m.normalize(_11);
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if(typeof a=="number"&&typeof b=="number"){ |
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return m._multiplyPoint(M,a,b);
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} |
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return m._multiplyPoint(M,a.x,a.y);
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},multiply:function(_12){ |
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var M=m.normalize(_12);
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for(var i=1;i<arguments.length;++i){ |
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var l=M,r=m.normalize(arguments[i]); |
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M=new m.Matrix2D();
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M.xx=l.xx*r.xx+l.xy*r.yx; |
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M.xy=l.xx*r.xy+l.xy*r.yy; |
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M.yx=l.yx*r.xx+l.yy*r.yx; |
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M.yy=l.yx*r.xy+l.yy*r.yy; |
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M.dx=l.xx*r.dx+l.xy*r.dy+l.dx; |
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M.dy=l.yx*r.dx+l.yy*r.dy+l.dy; |
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} |
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return M;
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},_sandwich:function(_13,x,y){ |
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return m.multiply(m.translate(x,y),_13,m.translate(-x,-y));
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},scaleAt:function(a,b,c,d){ |
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switch(arguments.length){ |
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case 4: |
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return m._sandwich(m.scale(a,b),c,d);
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case 3: |
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if(typeof c=="number"){ |
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return m._sandwich(m.scale(a),b,c);
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} |
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return m._sandwich(m.scale(a,b),c.x,c.y);
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} |
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return m._sandwich(m.scale(a),b.x,b.y);
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},rotateAt:function(_14,a,b){ |
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if(arguments.length>2){ |
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return m._sandwich(m.rotate(_14),a,b);
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} |
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return m._sandwich(m.rotate(_14),a.x,a.y);
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},rotategAt:function(_15,a,b){ |
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if(arguments.length>2){ |
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return m._sandwich(m.rotateg(_15),a,b);
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} |
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return m._sandwich(m.rotateg(_15),a.x,a.y);
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},skewXAt:function(_16,a,b){ |
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if(arguments.length>2){ |
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return m._sandwich(m.skewX(_16),a,b);
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} |
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return m._sandwich(m.skewX(_16),a.x,a.y);
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},skewXgAt:function(_17,a,b){ |
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if(arguments.length>2){ |
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return m._sandwich(m.skewXg(_17),a,b);
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} |
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return m._sandwich(m.skewXg(_17),a.x,a.y);
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},skewYAt:function(_18,a,b){ |
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if(arguments.length>2){ |
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return m._sandwich(m.skewY(_18),a,b);
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} |
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return m._sandwich(m.skewY(_18),a.x,a.y);
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},skewYgAt:function(_19,a,b){ |
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if(arguments.length>2){ |
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return m._sandwich(m.skewYg(_19),a,b);
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} |
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return m._sandwich(m.skewYg(_19),a.x,a.y);
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}}); |
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})(); |
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dojox.gfx.Matrix2D=dojox.gfx.matrix.Matrix2D; |
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} |