shadow-function
Version:
ioing lib - shadow Function, worker Function
200 lines (174 loc) • 6.5 kB
JavaScript
/**
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2011-2012 cocos2d-x.org
Copyright (c) 2013-2014 Chukong Technologies Inc.
Copyright (c) 2008, Luke Benstead.
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
(function(cc) {
/**
* A 3d vector.
* @class
* @param {number} [x]
* @param {number} [y]
* @param {number} [z]
*/
cc.math.Vec3 = cc.kmVec3 = function (x, y, z) {
if(x && y === undefined){
this.x = x.x;
this.y = x.y;
this.z = x.z;
} else {
this.x = x || 0;
this.y = y || 0;
this.z = z || 0;
}
};
cc.math.vec3 = function(x, y, z){
return new cc.math.Vec3(x, y, z);
};
var _p = cc.math.Vec3.prototype;
_p.fill = function (x, y, z) { // =cc.kmVec3Fill
if (x && y === undefined) {
this.x = x.x;
this.y = x.y;
this.z = x.z;
} else {
this.x = x;
this.y = y;
this.z = z;
}
return this;
};
_p.length = function () { //=cc.kmVec3Length
return Math.sqrt(cc.math.square(this.x) + cc.math.square(this.y) + cc.math.square(this.z));
};
_p.lengthSq = function () { //=cc.kmVec3LengthSq
return cc.math.square(this.x) + cc.math.square(this.y) + cc.math.square(this.z)
};
_p.normalize = function () { //= cc.kmVec3Normalize
var l = 1.0 / this.length();
this.x *= l;
this.y *= l;
this.z *= l;
return this;
};
_p.cross = function (vec3) { //= cc.kmVec3Cross
var x = this.x, y = this.y, z = this.z;
this.x = (y * vec3.z) - (z * vec3.y);
this.y = (z * vec3.x) - (x * vec3.z);
this.z = (x * vec3.y) - (y * vec3.x);
return this;
};
_p.dot = function (vec) { //= cc.kmVec3Dot
return ( this.x * vec.x + this.y * vec.y + this.z * vec.z );
};
_p.add = function(vec){ //= cc.kmVec3Add
this.x += vec.x;
this.y += vec.y;
this.z += vec.z;
return this;
};
_p.subtract = function (vec) { // = cc.kmVec3Subtract
this.x -= vec.x;
this.y -= vec.y;
this.z -= vec.z;
return this;
};
_p.transform = function (mat4) { // = cc.kmVec3Transform
var x = this.x, y = this.y, z = this.z, mat = mat4.mat;
this.x = x * mat[0] + y * mat[4] + z * mat[8] + mat[12];
this.y = x * mat[1] + y * mat[5] + z * mat[9] + mat[13];
this.z = x * mat[2] + y * mat[6] + z * mat[10] + mat[14];
return this;
};
_p.transformNormal = function(mat4){
/*
a = (Vx, Vy, Vz, 0)
b = (a×M)T
Out = (bx, by, bz)
*/
//Omits the translation, only scaling + rotating
var x = this.x, y = this.y, z = this.z, mat = mat4.mat;
this.x = x * mat[0] + y * mat[4] + z * mat[8];
this.y = x * mat[1] + y * mat[5] + z * mat[9];
this.z = x * mat[2] + y * mat[6] + z * mat[10];
return this;
};
_p.transformCoord = function(mat4){ // = cc.kmVec3TransformCoord
/*
a = (Vx, Vy, Vz, 1)
b = (a×M)T
Out = 1⁄bw(bx, by, bz)
*/
var v = new cc.math.Vec4(this.x, this.y, this.z, 1.0);
v.transform(mat4);
this.x = v.x / v.w;
this.y = v.y / v.w;
this.z = v.z / v.w;
return this;
};
_p.scale = function(scale){ // = cc.kmVec3Scale
this.x *= scale;
this.y *= scale;
this.z *= scale;
return this;
};
_p.equals = function(vec){ // = cc.kmVec3AreEqual
var EPSILON = cc.math.EPSILON;
return (this.x < (vec.x + EPSILON) && this.x > (vec.x - EPSILON)) &&
(this.y < (vec.y + EPSILON) && this.y > (vec.y - EPSILON)) &&
(this.z < (vec.z + EPSILON) && this.z > (vec.z - EPSILON));
};
_p.inverseTransform = function(mat4){ //= cc.kmVec3InverseTransform
var mat = mat4.mat;
var v1 = new cc.math.Vec3(this.x - mat[12], this.y - mat[13], this.z - mat[14]);
this.x = v1.x * mat[0] + v1.y * mat[1] + v1.z * mat[2];
this.y = v1.x * mat[4] + v1.y * mat[5] + v1.z * mat[6];
this.z = v1.x * mat[8] + v1.y * mat[9] + v1.z * mat[10];
return this;
};
_p.inverseTransformNormal = function(mat4){ // = cc.kmVec3InverseTransformNormal
var x = this.x, y = this.y, z = this.z, mat = mat4.mat;
this.x = x * mat[0] + y * mat[1] + z * mat[2];
this.y = x * mat[4] + y * mat[5] + z * mat[6];
this.z = x * mat[8] + y * mat[9] + z * mat[10];
return this;
};
_p.assignFrom = function(vec){
if(!vec)
return this;
this.x = vec.x;
this.y = vec.y;
this.z = vec.z;
return this;
};
cc.math.Vec3.zero = function(vec){ // = cc.kmVec3Zero
vec.x = vec.y = vec.z = 0.0;
return vec;
};
_p.toTypeArray = function(){ //cc.kmVec3ToTypeArray
var tyArr = new Float32Array(3);
tyArr[0] = this.x;
tyArr[1] = this.y;
tyArr[2] = this.z;
return tyArr;
};
})(cc);