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