New file |
0,0 → 1,110 |
if(!dojo._hasResource["dojox.gfx3d.vector"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code. |
dojo._hasResource["dojox.gfx3d.vector"] = true; |
dojo.provide("dojox.gfx3d.vector"); |
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dojo.mixin(dojox.gfx3d.vector, { |
sum: function(){ |
// summary: sum of the vectors |
var v = {x: 0, y: 0, z:0}; |
dojo.forEach(arguments, function(item){ v.x += item.x; v.y += item.y; v.z += item.z; }); |
return v; |
}, |
|
center: function(){ |
// summary: center of the vectors |
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(/* Pointer */a, /* Pointer */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){ |
// summary: applies a cross product of two vectorss, (x, y, z) and (u, v, w) |
// x: Number: an x coordinate of a point |
// y: Number: a y coordinate of a point |
// z: Number: a z coordinate of a point |
// u: Number: an x coordinate of a point |
// v: Number: a y coordinate of a point |
// w: Number: a z coordinate of a point |
return {x: y * w - z * v, y: z * u - x * w, z: x * v - y * u}; // Object |
}, |
|
crossProduct: function(/* Number||Point */ a, /* Number||Point */ b, /* Number, optional */ c, /* Number, optional */ d, /* Number, optional */ e, /* Number, optional */ f){ |
// summary: applies a matrix to a point |
// matrix: dojox.gfx3d.matrix.Matrix3D: a 3D matrix object to be applied |
// a: Number: an x coordinate of a point |
// b: Number: a y coordinate of a point |
// c: Number: a z coordinate of a point |
// d: Number: an x coordinate of a point |
// e: Number: a y coordinate of a point |
// f: Number: a z coordinate of a point |
if(arguments.length == 6 && dojo.every(arguments, function(item){ return typeof item == "number"; })){ |
return dojox.gfx3d.vector._crossProduct(a, b, c, d, e, f); // Object |
} |
// branch |
// a: Object: a point |
// b: Object: a point |
// c: null |
// d: null |
// e: null |
// f: null |
return dojox.gfx3d.vector._crossProduct(a.x, a.y, a.z, b.x, b.y, b.z); // Object |
}, |
|
_dotProduct: function(x, y, z, u, v, w){ |
// summary: applies a cross product of two vectorss, (x, y, z) and (u, v, w) |
// x: Number: an x coordinate of a point |
// y: Number: a y coordinate of a point |
// z: Number: a z coordinate of a point |
// u: Number: an x coordinate of a point |
// v: Number: a y coordinate of a point |
// w: Number: a z coordinate of a point |
return x * u + y * v + z * w; // Number |
}, |
dotProduct: function(/* Number||Point */ a, /* Number||Point */ b, /* Number, optional */ c, /* Number, optional */ d, /* Number, optional */ e, /* Number, optional */ f){ |
// summary: applies a matrix to a point |
// matrix: dojox.gfx3d.matrix.Matrix3D: a 3D matrix object to be applied |
// a: Number: an x coordinate of a point |
// b: Number: a y coordinate of a point |
// c: Number: a z coordinate of a point |
// d: Number: an x coordinate of a point |
// e: Number: a y coordinate of a point |
// f: Number: a z coordinate of a point |
if(arguments.length == 6 && dojo.every(arguments, function(item){ return typeof item == "number"; })){ |
return dojox.gfx3d.vector._dotProduct(a, b, c, d, e, f); // Object |
} |
// branch |
// a: Object: a point |
// b: Object: a point |
// c: null |
// d: null |
// e: null |
// f: null |
return dojox.gfx3d.vector._dotProduct(a.x, a.y, a.z, b.x, b.y, b.z); // Object |
}, |
|
normalize: function(/* Point||Array*/ a, /* Point */ b, /* Point */ c){ |
// summary: find the normal of the implicit surface |
// a: Object: a point |
// b: Object: a point |
// c: Object: a point |
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); |
} |
}); |
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} |