mirror of https://github.com/axmolengine/axmol.git
133 lines
5.4 KiB
C++
133 lines
5.4 KiB
C++
/****************************************************************************
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Copyright (c) 2010 cocos2d-x.org
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "CCAffineTransform.h"
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#include <algorithm>
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#include <math.h>
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using namespace std;
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NS_CC_BEGIN
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CCAffineTransform __CCAffineTransformMake(CCFloat a, CCFloat b, CCFloat c, CCFloat d, CCFloat tx, CCFloat ty)
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{
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CCAffineTransform t;
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t.a = a; t.b = b; t.c = c; t.d = d; t.tx = tx; t.ty = ty;
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return t;
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}
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CCPoint __CCPointApplyAffineTransform(const CCPoint& point, const CCAffineTransform& t)
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{
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CCPoint p;
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p.x = (CCFloat)((double)t.a * point.x + (double)t.c * point.y + t.tx);
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p.y = (CCFloat)((double)t.b * point.x + (double)t.d * point.y + t.ty);
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return p;
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}
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CCSize __CCSizeApplyAffineTransform(const CCSize& size, const CCAffineTransform& t)
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{
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CCSize s;
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s.width = (CCFloat)((double)t.a * size.width + (double)t.c * size.height);
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s.height = (CCFloat)((double)t.b * size.width + (double)t.d * size.height);
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return s;
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}
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CCAffineTransform CCAffineTransformMakeIdentity()
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{
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return __CCAffineTransformMake(1.0, 0.0, 0.0, 1.0, 0.0, 0.0);
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}
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extern const CCAffineTransform CCAffineTransformIdentity = CCAffineTransformMakeIdentity();
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CCRect CCRectApplyAffineTransform(const CCRect& rect, const CCAffineTransform& anAffineTransform)
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{
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CCFloat top = CCRect::CCRectGetMinY(rect);
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CCFloat left = CCRect::CCRectGetMinX(rect);
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CCFloat right = CCRect::CCRectGetMaxX(rect);
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CCFloat bottom = CCRect::CCRectGetMaxY(rect);
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CCPoint topLeft = CCPointApplyAffineTransform(CCPointMake(left, top), anAffineTransform);
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CCPoint topRight = CCPointApplyAffineTransform(CCPointMake(right, top), anAffineTransform);
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CCPoint bottomLeft = CCPointApplyAffineTransform(CCPointMake(left, bottom), anAffineTransform);
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CCPoint bottomRight = CCPointApplyAffineTransform(CCPointMake(right, bottom), anAffineTransform);
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CCFloat minX = min(min(topLeft.x, topRight.x), min(bottomLeft.x, bottomRight.x));
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CCFloat maxX = max(max(topLeft.x, topRight.x), max(bottomLeft.x, bottomRight.x));
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CCFloat minY = min(min(topLeft.y, topRight.y), min(bottomLeft.y, bottomRight.y));
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CCFloat maxY = max(max(topLeft.y, topRight.y), max(bottomLeft.y, bottomRight.y));
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return CCRectMake(minX, minY, (maxX - minX), (maxY - minY));
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}
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CCAffineTransform CCAffineTransformTranslate(const CCAffineTransform& t, float tx, float ty)
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{
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return __CCAffineTransformMake(t.a, t.b, t.c, t.d, t.tx + t.a * tx + t.c * ty, t.ty + t.b * tx + t.d * ty);
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}
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CCAffineTransform CCAffineTransformScale(const CCAffineTransform& t, CCFloat sx, CCFloat sy)
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{
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return __CCAffineTransformMake(t.a * sx, t.b * sx, t.c * sy, t.d * sy, t.tx, t.ty);
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}
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CCAffineTransform CCAffineTransformRotate(const CCAffineTransform& t, CCFloat anAngle)
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{
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float fSin = sin(anAngle);
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float fCos = cos(anAngle);
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return __CCAffineTransformMake( t.a * fCos + t.c * fSin,
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t.b * fCos + t.d * fSin,
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t.c * fCos - t.a * fSin,
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t.d * fCos - t.b * fSin,
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t.tx,
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t.ty);
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}
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/* Concatenate `t2' to `t1' and return the result:
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t' = t1 * t2 */
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CCAffineTransform CCAffineTransformConcat(const CCAffineTransform& t1, const CCAffineTransform& t2)
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{
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return __CCAffineTransformMake( t1.a * t2.a + t1.b * t2.c, t1.a * t2.b + t1.b * t2.d, //a,b
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t1.c * t2.a + t1.d * t2.c, t1.c * t2.b + t1.d * t2.d, //c,d
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t1.tx * t2.a + t1.ty * t2.c + t2.tx, //tx
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t1.tx * t2.b + t1.ty * t2.d + t2.ty); //ty
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}
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/* Return true if `t1' and `t2' are equal, false otherwise. */
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bool CCAffineTransformEqualToTransform(const CCAffineTransform& t1, const CCAffineTransform& t2)
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{
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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);
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}
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CCAffineTransform CCAffineTransformInvert(const CCAffineTransform& t)
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{
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float determinant = 1 / (t.a * t.d - t.b * t.c);
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return __CCAffineTransformMake(determinant * t.d, -determinant * t.b, -determinant * t.c, determinant * t.a,
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determinant * (t.c * t.ty - t.d * t.tx), determinant * (t.b * t.tx - t.a * t.ty) );
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}
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NS_CC_END
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