mirror of https://github.com/axmolengine/axmol.git
67 lines
3.0 KiB
C
67 lines
3.0 KiB
C
/*
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Copyright (c) 2008, Luke Benstead.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* 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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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 ON
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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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#ifndef VEC2_H_INCLUDED
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#define VEC2_H_INCLUDED
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#include "platform/CCPlatformMacros.h"
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struct kmMat3;
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#ifndef kmScalar
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#define kmScalar float
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#endif
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#pragma pack(push) /* push current alignment to stack */
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#pragma pack(1) /* set alignment to 1 byte boundary */
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typedef struct kmVec2 {
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kmScalar x;
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kmScalar y;
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} kmVec2;
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#pragma pack(pop)
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#ifdef __cplusplus
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extern "C" {
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#endif
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CC_DLL kmVec2* kmVec2Fill(kmVec2* pOut, kmScalar x, kmScalar y);
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CC_DLL kmScalar kmVec2Length(const kmVec2* pIn); ///< Returns the length of the vector
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CC_DLL kmScalar kmVec2LengthSq(const kmVec2* pIn); ///< Returns the square of the length of the vector
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CC_DLL kmVec2* kmVec2Normalize(kmVec2* pOut, const kmVec2* pIn); ///< Returns the vector passed in set to unit length
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CC_DLL kmVec2* kmVec2Add(kmVec2* pOut, const kmVec2* pV1, const kmVec2* pV2); ///< Adds 2 vectors and returns the result
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CC_DLL kmScalar kmVec2Dot(const kmVec2* pV1, const kmVec2* pV2); /** Returns the Dot product which is the cosine of the angle between the two vectors multiplied by their lengths */
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CC_DLL kmVec2* kmVec2Subtract(kmVec2* pOut, const kmVec2* pV1, const kmVec2* pV2); ///< Subtracts 2 vectors and returns the result
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CC_DLL kmVec2* kmVec2Transform(kmVec2* pOut, const kmVec2* pV1, const struct kmMat3* pM); /** Transform the Vector */
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CC_DLL kmVec2* kmVec2TransformCoord(kmVec2* pOut, const kmVec2* pV, const struct kmMat3* pM); ///<Transforms a 2D vector by a given matrix, projecting the result back into w = 1.
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CC_DLL kmVec2* kmVec2Scale(kmVec2* pOut, const kmVec2* pIn, const kmScalar s); ///< Scales a vector to length s
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CC_DLL int kmVec2AreEqual(const kmVec2* p1, const kmVec2* p2); ///< Returns 1 if both vectors are equal
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#ifdef __cplusplus
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}
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#endif
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#endif // VEC2_H_INCLUDED
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