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 * use to calculate the matrix of node from parent node 28 * @class ccs.TransformHelp 29 * @extend ccs.Class 30 */ 31 ccs.TransformHelp = ccs.TransformHelp || ccs.Class.extend({}); 32 33 ccs.TransformHelp.helpMatrix1 = cc.affineTransformMake(1, 0, 0, 1, 0, 0); 34 ccs.TransformHelp.helpMatrix2 = cc.affineTransformMake(1, 0, 0, 1, 0, 0); 35 ccs.TransformHelp.helpPoint1 = cc.p(0, 0); 36 ccs.TransformHelp.helpPoint2 = cc.p(0, 0); 37 ccs.TransformHelp.helpParentNode = {}; 38 39 /** 40 * Calculate a BaseData's transform matrix from parent node. 41 * @function 42 * @static 43 * @param {ccs.BaseData} bone 44 * Constructor 45 */ 46 ccs.TransformHelp.transformFromParent = function (bone, parentNode) { 47 this.nodeToMatrix(bone, this.helpMatrix1); 48 this.nodeToMatrix(parentNode, this.helpMatrix2); 49 50 this.helpMatrix2 = cc.affineTransformInvert(this.helpMatrix2); 51 this.helpMatrix1 = cc.affineTransformConcat(this.helpMatrix1, this.helpMatrix2); 52 53 this.matrixToNode(this.helpMatrix1, bone); 54 }; 55 56 ccs.TransformHelp.transformToParent = function(node, parentNode){ 57 this.nodeToMatrix(node, this.helpMatrix1); 58 this.nodeToMatrix(parentNode, this.helpMatrix2); 59 60 this.helpMatrix1 = cc.affineTransformConcat(this.helpMatrix1, this.helpMatrix2); 61 62 this.matrixToNode(this.helpMatrix1, node); 63 }; 64 65 ccs.TransformHelp.transformFromParentWithoutScale = function(node, parentNode){ 66 // this.helpParentNode.copy(&parentNode); 67 68 for(var p in parentNode){ 69 this.helpParentNode[p] = parentNode[p]; 70 } 71 this.helpParentNode.scaleX = 1; 72 this.helpParentNode.scaleY = 1; 73 74 this.nodeToMatrix(node, this.helpMatrix1); 75 this.nodeToMatrix(this.helpParentNode, this.helpMatrix2); 76 77 this.helpMatrix2 = cc.affineTransformInvert(this.helpMatrix2); 78 this.helpMatrix1 = cc.affineTransformConcat(this.helpMatrix1, this.helpMatrix2); 79 80 this.matrixToNode(this.helpMatrix1, node); 81 }; 82 83 ccs.TransformHelp.transformToParentWithoutScale = function(node, parentNode){ 84 for(var p in parentNode){ 85 this.helpParentNode[p] = parentNode[p]; 86 } 87 this.helpParentNode.scaleX = 1; 88 this.helpParentNode.scaleY = 1; 89 90 this.nodeToMatrix(node, this.helpMatrix1); 91 this.nodeToMatrix(this.helpParentNode, this.helpMatrix2); 92 93 this.helpMatrix1 = cc.affineTransformConcat(this.helpMatrix1, this.helpMatrix2); 94 95 this.matrixToNode(this.helpMatrix1, node); 96 97 }; 98 99 /** 100 * @function 101 * @static 102 * @param {ccs.BaseData} node 103 * @param {cc.AffineTransform} matrix 104 */ 105 ccs.TransformHelp.nodeToMatrix = function (node, matrix) { 106 if (node.skewX === -node.skewY) { 107 var sine = Math.sin(node.skewX); 108 var cosine = Math.cos(node.skewX); 109 matrix.a = node.scaleX * cosine; 110 matrix.b = node.scaleX * -sine; 111 matrix.c = node.scaleY * sine; 112 matrix.d = node.scaleY * cosine; 113 } else { 114 matrix.a = node.scaleX * Math.cos(node.skewY); 115 matrix.b = node.scaleX * Math.sin(node.skewY); 116 matrix.c = node.scaleY * Math.sin(node.skewX); 117 matrix.d = node.scaleY * Math.cos(node.skewX); 118 } 119 matrix.tx = node.x; 120 matrix.ty = node.y; 121 }; 122 123 /** 124 * @function 125 * @static 126 * @param {cc.AffineTransform} matrix 127 * @param {ccs.BaseData} node 128 */ 129 ccs.TransformHelp.matrixToNode = function (matrix, node) { 130 /* 131 * In as3 language, there is a function called "deltaTransformPoint", it calculate a point used give Transform 132 * but not used the tx, ty value. we simulate the function here 133 */ 134 this.helpPoint1.x = 0; 135 this.helpPoint1.y = 1; 136 this.helpPoint1 = cc.pointApplyAffineTransform(this.helpPoint1, matrix); 137 this.helpPoint1.x -= matrix.tx; 138 this.helpPoint1.y -= matrix.ty; 139 140 this.helpPoint2.x = 1; 141 this.helpPoint2.y = 0; 142 this.helpPoint2 = cc.pointApplyAffineTransform(this.helpPoint2, matrix); 143 this.helpPoint2.x -= matrix.tx; 144 this.helpPoint2.y -= matrix.ty; 145 146 node.skewX = -(Math.atan2(this.helpPoint1.y, this.helpPoint1.x) - 1.5707964); //todo 147 //node.skewX = -Math.atan2(this.helpPoint2.y, this.helpPoint2.x); 148 node.skewY = Math.atan2(this.helpPoint2.y, this.helpPoint2.x); 149 node.scaleX = Math.sqrt(matrix.a * matrix.a + matrix.b * matrix.b); 150 node.scaleY = Math.sqrt(matrix.c * matrix.c + matrix.d * matrix.d); 151 node.x = matrix.tx; 152 node.y = matrix.ty; 153 }; 154 155 /** 156 * @function 157 * @static 158 * @param {ccs.BaseData} target 159 * @param {ccs.BaseData} source 160 */ 161 ccs.TransformHelp.nodeConcat = function (target, source) { 162 target.x += source.x; 163 target.y += source.y; 164 target.skewX += source.skewX; 165 target.skewY += source.skewY; 166 target.scaleX += source.scaleX; 167 target.scaleY += source.scaleY; 168 }; 169 170 /** 171 * @function 172 * @static 173 * @param {ccs.BaseData} target 174 * @param {ccs.BaseData} source 175 */ 176 ccs.TransformHelp.nodeSub = function (target, source) { 177 target.x -= source.x; 178 target.y -= source.y; 179 target.skewX -= source.skewX; 180 target.skewY -= source.skewY; 181 target.scaleX -= source.scaleX; 182 target.scaleY -= source.scaleY; 183 };