1 /**************************************************************************** 2 Copyright (c) 2008-2010 Ricardo Quesada 3 Copyright (c) 2011-2012 cocos2d-x.org 4 Copyright (c) 2013-2014 Chukong Technologies Inc. 5 6 http://www.cocos2d-x.org 7 8 Permission is hereby granted, free of charge, to any person obtaining a copy 9 of this software and associated documentation files (the "Software"), to deal 10 in the Software without restriction, including without limitation the rights 11 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 copies of the Software, and to permit persons to whom the Software is 13 furnished to do so, subject to the following conditions: 14 15 The above copyright notice and this permission notice shall be included in 16 all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 24 THE SOFTWARE. 25 ****************************************************************************/ 26 27 /** 28 * @function 29 * @param {Number} a 30 * @param {Number} b 31 * @param {Number} c 32 * @param {Number} d 33 * @param {Number} tx 34 * @param {Number} ty 35 */ 36 cc.AffineTransform = function (a, b, c, d, tx, ty) { 37 this.a = a; 38 this.b = b; 39 this.c = c; 40 this.d = d; 41 this.tx = tx; 42 this.ty = ty; 43 }; 44 45 /** 46 * 47 * @function 48 * @param {Number} a 49 * @param {Number} b 50 * @param {Number} c 51 * @param {Number} d 52 * @param {Number} tx 53 * @param {Number} ty 54 * @return {cc.AffineTransform} 55 * Constructor 56 */ 57 cc.AffineTransformMake = function (a, b, c, d, tx, ty) { 58 return {a: a, b: b, c: c, d: d, tx: tx, ty: ty}; 59 }; 60 61 /** 62 * 63 * @function 64 * @param {cc.Point} point 65 * @param {cc.AffineTransform} t 66 * @return {cc.Point} 67 * Constructor 68 */ 69 cc.PointApplyAffineTransform = function (point, t) { 70 return {x: t.a * point.x + t.c * point.y + t.tx, y: t.b * point.x + t.d * point.y + t.ty}; 71 }; 72 73 cc._PointApplyAffineTransform = function (x, y, t) { 74 return {x: t.a * x + t.c * y + t.tx, 75 y: t.b * x + t.d * y + t.ty}; 76 }; 77 78 /** 79 * 80 * @function 81 * @param {cc.Size} size 82 * @param {cc.AffineTransform} t 83 * @return {cc.Size} 84 * Constructor 85 */ 86 cc.SizeApplyAffineTransform = function (size, t) { 87 return {width: t.a * size.width + t.c * size.height, height: t.b * size.width + t.d * size.height}; 88 }; 89 90 /** 91 * 92 * @function 93 * @return {cc.AffineTransform} 94 * Constructor 95 */ 96 cc.AffineTransformMakeIdentity = function () { 97 return {a: 1.0, b: 0.0, c: 0.0, d: 1.0, tx: 0.0, ty: 0.0}; 98 }; 99 100 /** 101 * 102 * @function 103 * @return {cc.AffineTransform} 104 * Constructor 105 */ 106 cc.AffineTransformIdentity = function () { 107 return {a: 1.0, b: 0.0, c: 0.0, d: 1.0, tx: 0.0, ty: 0.0}; 108 }; 109 110 /** 111 * 112 * @function 113 * @param {cc.Rect} rect 114 * @param {cc.AffineTransform} anAffineTransform 115 * @return {cc.Rect} 116 * Constructor 117 */ 118 cc.RectApplyAffineTransform = function (rect, anAffineTransform) { 119 var top = cc.rectGetMinY(rect); 120 var left = cc.rectGetMinX(rect); 121 var right = cc.rectGetMaxX(rect); 122 var bottom = cc.rectGetMaxY(rect); 123 124 var topLeft = cc._PointApplyAffineTransform(left, top, anAffineTransform); 125 var topRight = cc._PointApplyAffineTransform(right, top, anAffineTransform); 126 var bottomLeft = cc._PointApplyAffineTransform(left, bottom, anAffineTransform); 127 var bottomRight = cc._PointApplyAffineTransform(right, bottom, anAffineTransform); 128 129 var minX = Math.min(topLeft.x, topRight.x, bottomLeft.x, bottomRight.x); 130 var maxX = Math.max(topLeft.x, topRight.x, bottomLeft.x, bottomRight.x); 131 var minY = Math.min(topLeft.y, topRight.y, bottomLeft.y, bottomRight.y); 132 var maxY = Math.max(topLeft.y, topRight.y, bottomLeft.y, bottomRight.y); 133 134 return cc.rect(minX, minY, (maxX - minX), (maxY - minY)); 135 }; 136 137 cc._RectApplyAffineTransformIn = function(rect, anAffineTransform){ 138 var top = cc.rectGetMinY(rect); 139 var left = cc.rectGetMinX(rect); 140 var right = cc.rectGetMaxX(rect); 141 var bottom = cc.rectGetMaxY(rect); 142 143 var topLeft = cc._PointApplyAffineTransform(left, top, anAffineTransform); 144 var topRight = cc._PointApplyAffineTransform(right, top, anAffineTransform); 145 var bottomLeft = cc._PointApplyAffineTransform(left, bottom, anAffineTransform); 146 var bottomRight = cc._PointApplyAffineTransform(right, bottom, anAffineTransform); 147 148 var minX = Math.min(topLeft.x, topRight.x, bottomLeft.x, bottomRight.x); 149 var maxX = Math.max(topLeft.x, topRight.x, bottomLeft.x, bottomRight.x); 150 var minY = Math.min(topLeft.y, topRight.y, bottomLeft.y, bottomRight.y); 151 var maxY = Math.max(topLeft.y, topRight.y, bottomLeft.y, bottomRight.y); 152 153 rect.x = minX; 154 rect.y = minY; 155 rect.width = maxX - minX; 156 rect.height = maxY - minY; 157 return rect; 158 }; 159 160 /** 161 * 162 * @function 163 * @param {cc.AffineTransform} t 164 * @param {Number} tx 165 * @param {Number}ty 166 * @return {cc.AffineTransform} 167 * Constructor 168 */ 169 cc.AffineTransformTranslate = function (t, tx, ty) { 170 return { 171 a: t.a, 172 b: t.b, 173 c: t.c, 174 d: t.d, 175 tx: t.tx + t.a * tx + t.c * ty, 176 ty: t.ty + t.b * tx + t.d * ty 177 }; 178 }; 179 180 /** 181 * 182 * @function 183 * @param {cc.AffineTransform} t 184 * @param {Number} sx 185 * @param {Number} sy 186 * @return {cc.AffineTransform} 187 * Constructor 188 */ 189 cc.AffineTransformScale = function (t, sx, sy) { 190 return {a: t.a * sx, b: t.b * sx, c: t.c * sy, d: t.d * sy, tx: t.tx, ty: t.ty}; 191 }; 192 193 /** 194 * 195 * @function 196 * @param {cc.AffineTransform} aTransform 197 * @param {Number} anAngle 198 * @return {cc.AffineTransform} 199 * Constructor 200 */ 201 cc.AffineTransformRotate = function (aTransform, anAngle) { 202 var fSin = Math.sin(anAngle); 203 var fCos = Math.cos(anAngle); 204 205 return {a: aTransform.a * fCos + aTransform.c * fSin, 206 b: aTransform.b * fCos + aTransform.d * fSin, 207 c: aTransform.c * fCos - aTransform.a * fSin, 208 d: aTransform.d * fCos - aTransform.b * fSin, 209 tx: aTransform.tx, 210 ty: aTransform.ty}; 211 }; 212 213 /** 214 * Concatenate `t2' to `t1' and return the result:<br/> 215 * t' = t1 * t2 216 * 217 * @function 218 * @param {cc.AffineTransform} t1 219 * @param {cc.AffineTransform} t2 220 * @return {cc.AffineTransform} 221 * Constructor 222 */ 223 cc.AffineTransformConcat = function (t1, t2) { 224 return {a: t1.a * t2.a + t1.b * t2.c, //a 225 b: t1.a * t2.b + t1.b * t2.d, //b 226 c: t1.c * t2.a + t1.d * t2.c, //c 227 d: t1.c * t2.b + t1.d * t2.d, //d 228 tx: t1.tx * t2.a + t1.ty * t2.c + t2.tx, //tx 229 ty: t1.tx * t2.b + t1.ty * t2.d + t2.ty}; //ty 230 }; 231 232 /** 233 * Return true if `t1' and `t2' are equal, false otherwise. 234 * 235 * @function 236 * @param {cc.AffineTransform} t1 237 * @param {cc.AffineTransform} t2 238 * @return {Boolean} 239 * Constructor 240 */ 241 cc.AffineTransformEqualToTransform = function (t1, t2) { 242 return ((t1.a === t2.a) && (t1.b === t2.b) && (t1.c === t2.c) && (t1.d === t2.d) && (t1.tx === t2.tx) && (t1.ty === t2.ty)); 243 }; 244 245 /** 246 * Get the invert value of an AffineTransform object 247 * 248 * @function 249 * @param {cc.AffineTransform} t 250 * @return {cc.AffineTransform} 251 * Constructor 252 */ 253 cc.AffineTransformInvert = function (t) { 254 var determinant = 1 / (t.a * t.d - t.b * t.c); 255 return {a: determinant * t.d, b: -determinant * t.b, c: -determinant * t.c, d: determinant * t.a, 256 tx: determinant * (t.c * t.ty - t.d * t.tx), ty: determinant * (t.b * t.tx - t.a * t.ty)}; 257 }; 258