112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
//
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// Matrix2x3.h
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// Kraken Engine / Hydra
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//
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// Copyright 2022 Kearwood Gilbert. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// 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 list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other materials
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// provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; 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 (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// The views and conclusions contained in the software and documentation are those of the
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// authors and should not be interpreted as representing official policies, either expressed
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// or implied, of Kearwood Gilbert.
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//
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#include "vector2.h"
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#include "vector3.h"
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#pragma once
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namespace hydra {
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class Matrix2x3
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{
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public:
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union
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{
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struct
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{
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Vector2 axis_x, axis_y, transform;
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};
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// Matrix components, in column-major order
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float c[6];
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};
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// Default initializer - Creates an identity matrix
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void init();
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void init(float* pMat);
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void init(const Vector2& new_axis_x, const Vector2& new_axis_y, const Vector2& new_transform);
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void init(const Matrix2x3& m);
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// Overload comparison operator
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bool operator==(const Matrix2x3& m) const;
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// Overload compound multiply operator
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Matrix2x3& operator*=(const Matrix2x3& m);
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float& operator[](unsigned i);
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float operator[](unsigned i) const;
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// Overload multiply operator
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Matrix2x3 operator*(const Matrix2x3& m) const;
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float* getPointer();
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void translate(float x, float y);
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void translate(const Vector2& v);
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void scale(float x, float y);
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void scale(const Vector2& v);
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void scale(float s);
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void rotate(float angle);
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bool invert();
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static Vector2 DotNoTranslate(const Matrix2x3& m, const Vector2& v); // Dot product without including translation; useful for transforming normals and tangents
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static Matrix2x3 Invert(const Matrix2x3& m);
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static Vector2 Dot(const Matrix2x3& m, const Vector2& v);
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static Matrix2x3 Translation(const Vector2& v);
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static Matrix2x3 Rotation(float angle);
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static Matrix2x3 Scaling(const Vector2& v);
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static Matrix2x3 Identity();
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};
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static_assert(std::is_pod<Matrix2x3>::value, "hydra::Matrix2x3 must be a POD type.");
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} // namespace hydra
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namespace std {
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template<>
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struct hash<hydra::Matrix2x3>
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{
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public:
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size_t operator()(const hydra::Matrix2x3& s) const
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{
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size_t h1 = hash<hydra::Vector2>()(s.axis_x);
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size_t h2 = hash<hydra::Vector2>()(s.axis_y);
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size_t h3 = hash<hydra::Vector2>()(s.transform);
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return h1 ^ (h2 << 1) ^ (h3 << 2);
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}
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};
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} // namespace std
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