mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
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76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
/*******************************************************************************
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* Copyright (c) 2013, Esoteric Software
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************/
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#include <math.h>
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#include <spine/BaseRegionAttachment.h>
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#ifndef M_PI
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#define M_PI 3.1415926535897932385
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#endif
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namespace spine {
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BaseRegionAttachment::BaseRegionAttachment () :
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x(0),
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y(0),
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scaleX(1),
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scaleY(1),
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rotation(0),
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width(0),
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height(0) {
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}
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void BaseRegionAttachment::updateOffset () {
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float localX2 = width / 2;
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float localY2 = height / 2;
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float localX = -localX2;
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float localY = -localY2;
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localX *= scaleX;
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localY *= scaleY;
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localX2 *= scaleX;
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localY2 *= scaleY;
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float radians = (float)(rotation * M_PI / 180);
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float cos = cosf(radians);
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float sin = sinf(radians);
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float localXCos = localX * cos + x;
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float localXSin = localX * sin;
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float localYCos = localY * cos + y;
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float localYSin = localY * sin;
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float localX2Cos = localX2 * cos + x;
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float localX2Sin = localX2 * sin;
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float localY2Cos = localY2 * cos + y;
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float localY2Sin = localY2 * sin;
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offset[0] = localXCos - localYSin;
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offset[1] = localYCos + localXSin;
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offset[2] = localXCos - localY2Sin;
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offset[3] = localY2Cos + localXSin;
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offset[4] = localX2Cos - localY2Sin;
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offset[5] = localY2Cos + localX2Sin;
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offset[6] = localX2Cos - localYSin;
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offset[7] = localYCos + localX2Sin;
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}
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} /* namespace spine */
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