mirror of https://github.com/axmolengine/axmol.git
130 lines
5.1 KiB
C++
130 lines
5.1 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 "CGAffineTransform.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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namespace cocos2d {
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CGAffineTransform __CGAffineTransformMake(CGFloat a, CGFloat b, CGFloat c, CGFloat d, CGFloat tx, CGFloat ty)
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{
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CGAffineTransform 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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CGPoint __CGPointApplyAffineTransform(CGPoint point, CGAffineTransform t)
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{
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CGPoint p;
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p.x = (CGFloat)((double)t.a * point.x + (double)t.c * point.y + t.tx);
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p.y = (CGFloat)((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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CGSize __CGSizeApplyAffineTransform(CGSize size, CGAffineTransform t)
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{
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CGSize s;
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s.width = (CGFloat)((double)t.a * size.width + (double)t.c * size.height);
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s.height = (CGFloat)((double)t.b * size.width + (double)t.d * size.height);
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return s;
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}
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CGAffineTransform CGAffineTransformMakeIdentity()
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{
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return __CGAffineTransformMake(1.0, 0.0, 0.0, 1.0, 0.0, 0.0);
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}
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extern const CGAffineTransform CGAffineTransformIdentity = CGAffineTransformMakeIdentity();
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CGRect CGRectApplyAffineTransform(CGRect rect, CGAffineTransform anAffineTransform)
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{
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CGFloat top = CGRect::CGRectGetMinY(rect);
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CGFloat left = CGRect::CGRectGetMinX(rect);
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CGFloat right = CGRect::CGRectGetMaxX(rect);
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CGFloat bottom = CGRect::CGRectGetMaxY(rect);
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CGPoint topLeft = CGPointApplyAffineTransform(CGPointMake(left, top), anAffineTransform);
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CGPoint topRight = CGPointApplyAffineTransform(CGPointMake(right, top), anAffineTransform);
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CGPoint bottomLeft = CGPointApplyAffineTransform(CGPointMake(left, bottom), anAffineTransform);
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CGPoint bottomRight = CGPointApplyAffineTransform(CGPointMake(right, bottom), anAffineTransform);
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CGFloat minX = min(min(topLeft.x, topRight.x), min(bottomLeft.x, bottomRight.x));
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CGFloat maxX = max(max(topLeft.x, topRight.x), max(bottomLeft.x, bottomRight.x));
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CGFloat minY = min(min(topLeft.y, topRight.y), min(bottomLeft.y, bottomRight.y));
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CGFloat maxY = max(max(topLeft.y, topRight.y), max(bottomLeft.y, bottomRight.y));
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return CGRectMake(minX, minY, (maxX - minX), (maxY - minY));
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}
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CGAffineTransform CGAffineTransformTranslate(CGAffineTransform t, float tx, float ty)
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{
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return __CGAffineTransformMake(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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CGAffineTransform CGAffineTransformScale(CGAffineTransform t, CGFloat sx, CGFloat sy)
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{
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return __CGAffineTransformMake(t.a * sx, t.b * sx, t.c * sy, t.d * sy, t.tx, t.ty);
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}
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CGAffineTransform CGAffineTransformRotate(CGAffineTransform t, CGFloat 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 __CGAffineTransformMake( 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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CGAffineTransform CGAffineTransformConcat(CGAffineTransform t1,CGAffineTransform t2)
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{
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return __CGAffineTransformMake( 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 CGAffineTransformEqualToTransform(CGAffineTransform t1,CGAffineTransform 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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CGAffineTransform CGAffineTransformInvert(CGAffineTransform 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 __CGAffineTransformMake(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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}//namespace cocos2d
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