1 /**************************************************************************** 2 Copyright (c) 2011-2012 cocos2d-x.org 3 Copyright (c) 2013-2014 Chukong Technologies Inc. 4 5 http://www.cocos2d-x.org 6 7 Permission is hereby granted, free of charge, to any person obtaining a copy 8 of this software and associated documentation files (the "Software"), to deal 9 in the Software without restriction, including without limitation the rights 10 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 copies of the Software, and to permit persons to whom the Software is 12 furnished to do so, subject to the following conditions: 13 14 The above copyright notice and this permission notice shall be included in 15 all copies or substantial portions of the Software. 16 17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 THE SOFTWARE. 24 ****************************************************************************/ 25 26 /** 27 * @class ccs.TransformHelp 28 * @extend ccs.Class 29 */ 30 ccs.TransformHelp = ccs.TransformHelp || ccs.Class.extend({}); 31 32 ccs.TransformHelp.helpMatrix1 = cc.AffineTransformMake(1, 0, 0, 1, 0, 0); 33 ccs.TransformHelp.helpMatrix2 = cc.AffineTransformMake(1, 0, 0, 1, 0, 0); 34 ccs.TransformHelp.helpPoint1 = cc.p(0, 0); 35 ccs.TransformHelp.helpPoint2 = cc.p(0, 0); 36 37 /** 38 * @function 39 * @static 40 * @param {ccs.BaseData} bone 41 * @return {cc.AffineTransform} 42 * Constructor 43 */ 44 ccs.TransformHelp.transformFromParent = function (bone, parentBone) { 45 this.nodeToMatrix(bone, this.helpMatrix1); 46 this.nodeToMatrix(parentBone, this.helpMatrix2); 47 48 this.helpMatrix2 = cc.AffineTransformInvert(this.helpMatrix2); 49 this.helpMatrix1 = cc.AffineTransformConcat(this.helpMatrix1, this.helpMatrix2); 50 51 this.matrixToNode(this.helpMatrix1, bone); 52 }; 53 54 /** 55 * @function 56 * @static 57 * @param {ccs.BaseData} node 58 * @param {cc.AffineTransform} matrix 59 */ 60 ccs.TransformHelp.nodeToMatrix = function (node, matrix) { 61 if (node.skewX == -node.skewY) { 62 var sine = Math.sin(node.skewX); 63 var cosine = Math.cos(node.skewX); 64 matrix.a = node.scaleX * cosine; 65 matrix.b = node.scaleX * -sine; 66 matrix.c = node.scaleY * sine; 67 matrix.d = node.scaleY * cosine; 68 } else { 69 matrix.a = node.scaleX * Math.cos(node.skewY); 70 matrix.b = node.scaleX * Math.sin(node.skewY); 71 matrix.c = node.scaleY * Math.sin(node.skewX); 72 matrix.d = node.scaleY * Math.cos(node.skewY); 73 } 74 matrix.tx = node.x; 75 matrix.ty = node.y; 76 }; 77 78 /** 79 * @function 80 * @static 81 * @param {cc.AffineTransform} matrix 82 * @param {ccs.BaseData} node 83 */ 84 ccs.TransformHelp.matrixToNode = function (matrix, node) { 85 /* 86 * In as3 language, there is a function called "deltaTransformPoint", it calculate a point used give Transform 87 * but not used the tx, ty value. we simulate the function here 88 */ 89 this.helpPoint1.x = 0; 90 this.helpPoint1.y = 1; 91 this.helpPoint1 = cc.PointApplyAffineTransform(this.helpPoint1, matrix); 92 this.helpPoint1.x -= matrix.tx; 93 this.helpPoint1.y -= matrix.ty; 94 95 this.helpPoint2.x = 1; 96 this.helpPoint2.y = 0; 97 this.helpPoint2 = cc.PointApplyAffineTransform(this.helpPoint2, matrix); 98 this.helpPoint2.x -= matrix.tx; 99 this.helpPoint2.y -= matrix.ty; 100 101 node.skewX = -(Math.atan2(this.helpPoint1.y, this.helpPoint1.x) - 1.5707964); //todo 102 //node.skewX = -Math.atan2(this.helpPoint2.y, this.helpPoint2.x); 103 node.skewY = Math.atan2(this.helpPoint2.y, this.helpPoint2.x); 104 node.scaleX = Math.sqrt(matrix.a * matrix.a + matrix.b * matrix.b); 105 node.scaleY = Math.sqrt(matrix.c * matrix.c + matrix.d * matrix.d); 106 node.x = matrix.tx; 107 node.y = matrix.ty; 108 }; 109 110 /** 111 * @function 112 * @static 113 * @param {ccs.BaseData} target 114 * @param {ccs.BaseData} source 115 */ 116 ccs.TransformHelp.nodeConcat = function (target, source) { 117 target.x += source.x; 118 target.y += source.y; 119 target.skewX += source.skewX; 120 target.skewY += source.skewY; 121 target.scaleX += source.scaleX; 122 target.scaleY += source.scaleY; 123 }; 124 125 /** 126 * @function 127 * @static 128 * @param {ccs.BaseData} target 129 * @param {ccs.BaseData} source 130 */ 131 ccs.TransformHelp.nodeSub = function (target, source) { 132 target.x -= source.x; 133 target.y -= source.y; 134 target.skewX -= source.skewX; 135 target.skewY -= source.skewY; 136 target.scaleX -= source.scaleX; 137 target.scaleY -= source.scaleY; 138 };