root / trunk / web / dojo / dojox / gfx3d / vector.js @ 12
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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.gfx3d.vector"]){ |
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dojo._hasResource["dojox.gfx3d.vector"]=true; |
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dojo.provide("dojox.gfx3d.vector");
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dojo.mixin(dojox.gfx3d.vector,{sum:function(){
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var v={x:0,y:0,z:0}; |
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dojo.forEach(arguments,function(_1){ |
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v.x+=_1.x; |
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v.y+=_1.y; |
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v.z+=_1.z; |
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}); |
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return v;
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},center:function(){ |
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var l=arguments.length; |
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if(l==0){ |
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return {x:0,y:0,z:0}; |
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} |
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var v=dojox.gfx3d.vector.sum(arguments); |
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return {x:v.x/l,y:v.y/l,z:v.z/l}; |
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},substract:function(a,b){ |
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return {x:a.x-b.x,y:a.y-b.y,z:a.z-b.z}; |
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},_crossProduct:function(x,y,z,u,v,w){ |
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return {x:y*w-z*v,y:z*u-x*w,z:x*v-y*u}; |
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},crossProduct:function(a,b,c,d,e,f){ |
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if(arguments.length==6&&dojo.every(arguments,function(_2){ |
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return typeof _2=="number"; |
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})){
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return dojox.gfx3d.vector._crossProduct(a,b,c,d,e,f);
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} |
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return dojox.gfx3d.vector._crossProduct(a.x,a.y,a.z,b.x,b.y,b.z);
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},_dotProduct:function(x,y,z,u,v,w){ |
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return x*u+y*v+z*w;
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},dotProduct:function(a,b,c,d,e,f){ |
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if(arguments.length==6&&dojo.every(arguments,function(_3){ |
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return typeof _3=="number"; |
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})){
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return dojox.gfx3d.vector._dotProduct(a,b,c,d,e,f);
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} |
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return dojox.gfx3d.vector._dotProduct(a.x,a.y,a.z,b.x,b.y,b.z);
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},normalize:function(a,b,c){ |
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var l,m,n;
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if(a instanceof Array){ |
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l=a[0];
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m=a[1];
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n=a[2];
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}else{
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l=a; |
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m=b; |
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n=c; |
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} |
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var u=dojox.gfx3d.vector.substract(m,l);
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var v=dojox.gfx3d.vector.substract(n,l);
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return dojox.gfx3d.vector.crossProduct(u,v);
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}}); |
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} |