root / trunk / web / dojo / dojox / gfx3d / vector.js @ 9
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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.gfx3d.vector"]){ |
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| 9 | dojo._hasResource["dojox.gfx3d.vector"]=true; |
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| 10 | dojo.provide("dojox.gfx3d.vector");
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| 11 | dojo.mixin(dojox.gfx3d.vector,{sum:function(){
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| 12 | var v={x:0,y:0,z:0}; |
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| 13 | dojo.forEach(arguments,function(_1){ |
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| 14 | v.x+=_1.x; |
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| 15 | v.y+=_1.y; |
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| 16 | v.z+=_1.z; |
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| 17 | }); |
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| 18 | return v;
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| 19 | },center:function(){ |
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| 20 | var l=arguments.length; |
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| 21 | if(l==0){ |
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| 22 | return {x:0,y:0,z:0}; |
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| 23 | } |
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| 24 | var v=dojox.gfx3d.vector.sum(arguments); |
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| 25 | return {x:v.x/l,y:v.y/l,z:v.z/l}; |
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| 26 | },substract:function(a,b){ |
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| 27 | return {x:a.x-b.x,y:a.y-b.y,z:a.z-b.z}; |
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| 28 | },_crossProduct:function(x,y,z,u,v,w){ |
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| 29 | return {x:y*w-z*v,y:z*u-x*w,z:x*v-y*u}; |
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| 30 | },crossProduct:function(a,b,c,d,e,f){ |
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| 31 | if(arguments.length==6&&dojo.every(arguments,function(_2){ |
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| 32 | return typeof _2=="number"; |
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| 33 | })){
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| 34 | return dojox.gfx3d.vector._crossProduct(a,b,c,d,e,f);
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| 35 | } |
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| 36 | return dojox.gfx3d.vector._crossProduct(a.x,a.y,a.z,b.x,b.y,b.z);
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| 37 | },_dotProduct:function(x,y,z,u,v,w){ |
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| 38 | return x*u+y*v+z*w;
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| 39 | },dotProduct:function(a,b,c,d,e,f){ |
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| 40 | if(arguments.length==6&&dojo.every(arguments,function(_3){ |
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| 41 | return typeof _3=="number"; |
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| 42 | })){
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| 43 | return dojox.gfx3d.vector._dotProduct(a,b,c,d,e,f);
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| 44 | } |
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| 45 | return dojox.gfx3d.vector._dotProduct(a.x,a.y,a.z,b.x,b.y,b.z);
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| 46 | },normalize:function(a,b,c){ |
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| 47 | var l,m,n;
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| 48 | if(a instanceof Array){ |
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| 49 | l=a[0];
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| 50 | m=a[1];
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| 51 | n=a[2];
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| 52 | }else{
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| 53 | l=a; |
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| 54 | m=b; |
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| 55 | n=c; |
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| 56 | } |
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| 57 | var u=dojox.gfx3d.vector.substract(m,l);
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| 58 | var v=dojox.gfx3d.vector.substract(n,l);
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| 59 | return dojox.gfx3d.vector.crossProduct(u,v);
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| 60 | }}); |
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| 61 | } |