root / trunk / web / dojo / dojox / gfx / matrix.js @ 13
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| 1 | 9 | andrej.cim | /*
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| 2 | Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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| 3 | Available via Academic Free License >= 2.1 OR the modified BSD license.
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| 4 | see: http://dojotoolkit.org/license for details
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| 5 | */
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| 6 | |||
| 7 | |||
| 8 | if(!dojo._hasResource["dojox.gfx.matrix"]){ |
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| 9 | dojo._hasResource["dojox.gfx.matrix"]=true; |
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| 10 | dojo.provide("dojox.gfx.matrix");
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| 11 | (function(){
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| 12 | var m=dojox.gfx.matrix;
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| 13 | var _1={};
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| 14 | m._degToRad=function(_2){ |
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| 15 | return _1[_2]||(_1[_2]=(Math.PI*_2/180)); |
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| 16 | }; |
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| 17 | m._radToDeg=function(_3){ |
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| 18 | return _3/Math.PI*180; |
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| 19 | }; |
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| 20 | m.Matrix2D=function(_4){ |
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| 21 | if(_4){
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| 22 | if(typeof _4=="number"){ |
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| 23 | this.xx=this.yy=_4; |
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| 24 | }else{
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| 25 | if(_4 instanceof Array){ |
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| 26 | if(_4.length>0){ |
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| 27 | var _5=m.normalize(_4[0]); |
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| 28 | for(var i=1;i<_4.length;++i){ |
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| 29 | var l=_5,r=dojox.gfx.matrix.normalize(_4[i]);
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| 30 | _5=new m.Matrix2D();
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| 31 | _5.xx=l.xx*r.xx+l.xy*r.yx; |
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| 32 | _5.xy=l.xx*r.xy+l.xy*r.yy; |
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| 33 | _5.yx=l.yx*r.xx+l.yy*r.yx; |
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| 34 | _5.yy=l.yx*r.xy+l.yy*r.yy; |
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| 35 | _5.dx=l.xx*r.dx+l.xy*r.dy+l.dx; |
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| 36 | _5.dy=l.yx*r.dx+l.yy*r.dy+l.dy; |
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| 37 | } |
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| 38 | dojo.mixin(this,_5);
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| 39 | } |
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| 40 | }else{
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| 41 | dojo.mixin(this,_4);
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| 42 | } |
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| 43 | } |
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| 44 | } |
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| 45 | }; |
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| 46 | dojo.extend(m.Matrix2D,{xx:1,xy:0,yx:0,yy:1,dx:0,dy:0});
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| 47 | 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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| 48 | if(arguments.length>1){ |
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| 49 | return new m.Matrix2D({dx:a,dy:b}); |
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| 50 | } |
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| 51 | return new m.Matrix2D({dx:a.x,dy:a.y}); |
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| 52 | },scale:function(a,b){ |
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| 53 | if(arguments.length>1){ |
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| 54 | return new m.Matrix2D({xx:a,yy:b}); |
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| 55 | } |
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| 56 | if(typeof a=="number"){ |
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| 57 | return new m.Matrix2D({xx:a,yy:a}); |
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| 58 | } |
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| 59 | return new m.Matrix2D({xx:a.x,yy:a.y}); |
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| 60 | },rotate:function(_6){ |
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| 61 | var c=Math.cos(_6);
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| 62 | var s=Math.sin(_6);
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| 63 | return new m.Matrix2D({xx:c,xy:-s,yx:s,yy:c}); |
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| 64 | },rotateg:function(_7){ |
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| 65 | return m.rotate(m._degToRad(_7));
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| 66 | },skewX:function(_8){ |
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| 67 | return new m.Matrix2D({xy:Math.tan(_8)}); |
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| 68 | },skewXg:function(_9){ |
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| 69 | return m.skewX(m._degToRad(_9));
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| 70 | },skewY:function(_a){ |
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| 71 | return new m.Matrix2D({yx:Math.tan(_a)}); |
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| 72 | },skewYg:function(_b){ |
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| 73 | return m.skewY(m._degToRad(_b));
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| 74 | },reflect:function(a,b){ |
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| 75 | if(arguments.length==1){ |
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| 76 | b=a.y; |
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| 77 | a=a.x; |
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| 78 | } |
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| 79 | var a2=a*a,b2=b*b,n2=a2+b2,xy=2*a*b/n2; |
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| 80 | return new m.Matrix2D({xx:2*a2/n2-1,xy:xy,yx:xy,yy:2*b2/n2-1}); |
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| 81 | },project:function(a,b){ |
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| 82 | if(arguments.length==1){ |
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| 83 | b=a.y; |
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| 84 | a=a.x; |
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| 85 | } |
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| 86 | var a2=a*a,b2=b*b,n2=a2+b2,xy=a*b/n2;
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| 87 | return new m.Matrix2D({xx:a2/n2,xy:xy,yx:xy,yy:b2/n2}); |
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| 88 | },normalize:function(_c){ |
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| 89 | return (_c instanceof m.Matrix2D)?_c:new m.Matrix2D(_c); |
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| 90 | },clone:function(_d){ |
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| 91 | var _e=new m.Matrix2D(); |
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| 92 | for(var i in _d){ |
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| 93 | if(typeof (_d[i])=="number"&&typeof (_e[i])=="number"&&_e[i]!=_d[i]){ |
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| 94 | _e[i]=_d[i]; |
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| 95 | } |
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| 96 | } |
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| 97 | return _e;
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| 98 | },invert:function(_f){ |
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| 99 | 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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| 100 | return M;
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| 101 | },_multiplyPoint:function(_10,x,y){ |
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| 102 | return {x:_10.xx*x+_10.xy*y+_10.dx,y:_10.yx*x+_10.yy*y+_10.dy}; |
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| 103 | },multiplyPoint:function(_11,a,b){ |
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| 104 | var M=m.normalize(_11);
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| 105 | if(typeof a=="number"&&typeof b=="number"){ |
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| 106 | return m._multiplyPoint(M,a,b);
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| 107 | } |
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| 108 | return m._multiplyPoint(M,a.x,a.y);
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| 109 | },multiply:function(_12){ |
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| 110 | var M=m.normalize(_12);
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| 111 | for(var i=1;i<arguments.length;++i){ |
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| 112 | var l=M,r=m.normalize(arguments[i]); |
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| 113 | M=new m.Matrix2D();
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| 114 | M.xx=l.xx*r.xx+l.xy*r.yx; |
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| 115 | M.xy=l.xx*r.xy+l.xy*r.yy; |
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| 116 | M.yx=l.yx*r.xx+l.yy*r.yx; |
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| 117 | M.yy=l.yx*r.xy+l.yy*r.yy; |
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| 118 | M.dx=l.xx*r.dx+l.xy*r.dy+l.dx; |
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| 119 | M.dy=l.yx*r.dx+l.yy*r.dy+l.dy; |
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| 120 | } |
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| 121 | return M;
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| 122 | },_sandwich:function(_13,x,y){ |
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| 123 | return m.multiply(m.translate(x,y),_13,m.translate(-x,-y));
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| 124 | },scaleAt:function(a,b,c,d){ |
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| 125 | switch(arguments.length){ |
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| 126 | case 4: |
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| 127 | return m._sandwich(m.scale(a,b),c,d);
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| 128 | case 3: |
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| 129 | if(typeof c=="number"){ |
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| 130 | return m._sandwich(m.scale(a),b,c);
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| 131 | } |
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| 132 | return m._sandwich(m.scale(a,b),c.x,c.y);
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| 133 | } |
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| 134 | return m._sandwich(m.scale(a),b.x,b.y);
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| 135 | },rotateAt:function(_14,a,b){ |
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| 136 | if(arguments.length>2){ |
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| 137 | return m._sandwich(m.rotate(_14),a,b);
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| 138 | } |
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| 139 | return m._sandwich(m.rotate(_14),a.x,a.y);
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| 140 | },rotategAt:function(_15,a,b){ |
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| 141 | if(arguments.length>2){ |
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| 142 | return m._sandwich(m.rotateg(_15),a,b);
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| 143 | } |
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| 144 | return m._sandwich(m.rotateg(_15),a.x,a.y);
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| 145 | },skewXAt:function(_16,a,b){ |
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| 146 | if(arguments.length>2){ |
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| 147 | return m._sandwich(m.skewX(_16),a,b);
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| 148 | } |
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| 149 | return m._sandwich(m.skewX(_16),a.x,a.y);
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| 150 | },skewXgAt:function(_17,a,b){ |
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| 151 | if(arguments.length>2){ |
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| 152 | return m._sandwich(m.skewXg(_17),a,b);
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| 153 | } |
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| 154 | return m._sandwich(m.skewXg(_17),a.x,a.y);
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| 155 | },skewYAt:function(_18,a,b){ |
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| 156 | if(arguments.length>2){ |
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| 157 | return m._sandwich(m.skewY(_18),a,b);
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| 158 | } |
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| 159 | return m._sandwich(m.skewY(_18),a.x,a.y);
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| 160 | },skewYgAt:function(_19,a,b){ |
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| 161 | if(arguments.length>2){ |
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| 162 | return m._sandwich(m.skewYg(_19),a,b);
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| 163 | } |
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| 164 | return m._sandwich(m.skewYg(_19),a.x,a.y);
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| 165 | }}); |
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| 166 | })(); |
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| 167 | dojox.gfx.Matrix2D=dojox.gfx.matrix.Matrix2D; |
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| 168 | } |