130 lines
4.4 KiB
C++
130 lines
4.4 KiB
C++
//
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// Vector4.h
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// Kraken
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//
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// Copyright 2018 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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#ifndef KRAKEN_VECTOR4_H
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#define KRAKEN_VECTOR4_H
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#include <functional> // for hash<>
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namespace kraken {
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class Vector3;
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class Vector4 {
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public:
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union {
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struct {
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float x, y, z, w;
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};
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float c[4];
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};
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void init();
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void init(float X, float Y, float Z, float W);
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void init(float v);
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void init(float *v);
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void init(const Vector4 &v);
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void init(const Vector3 &v, float W);
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static Vector4 Create();
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static Vector4 Create(float X, float Y, float Z, float W);
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static Vector4 Create(float v);
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static Vector4 Create(float *v);
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static Vector4 Create(const Vector4 &v);
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static Vector4 Create(const Vector3 &v, float W);
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Vector4 operator +(const Vector4& b) const;
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Vector4 operator -(const Vector4& b) const;
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Vector4 operator +() const;
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Vector4 operator -() const;
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Vector4 operator *(const float v) const;
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Vector4 operator /(const float v) const;
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Vector4& operator +=(const Vector4& b);
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Vector4& operator -=(const Vector4& b);
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Vector4& operator *=(const float v);
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Vector4& operator /=(const float v);
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bool operator ==(const Vector4& b) const;
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bool operator !=(const Vector4& b) const;
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// Comparison operators are implemented to allow insertion into sorted containers such as std::set
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bool operator >(const Vector4& b) const;
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bool operator <(const Vector4& b) const;
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float& operator[](unsigned i);
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float operator[](unsigned i) const;
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float sqrMagnitude() const; // calculate the square of the magnitude (useful for comparison of magnitudes without the cost of a sqrt() function)
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float magnitude() const;
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void normalize();
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static Vector4 Normalize(const Vector4 &v);
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static float Dot(const Vector4 &v1, const Vector4 &v2);
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static Vector4 Min(const Vector4 &v1, const Vector4 &v2);
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static Vector4 Max(const Vector4 &v1, const Vector4 &v2);
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static Vector4 Min();
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static Vector4 Max();
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static Vector4 Zero();
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static Vector4 One();
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static Vector4 Forward();
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static Vector4 Backward();
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static Vector4 Up();
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static Vector4 Down();
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static Vector4 Left();
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static Vector4 Right();
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static Vector4 Lerp(const Vector4 &v1, const Vector4 &v2, float d);
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static Vector4 Slerp(const Vector4 &v1, const Vector4 &v2, float d);
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static void OrthoNormalize(Vector4 &normal, Vector4 &tangent); // Gram-Schmidt Orthonormalization
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};
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static_assert(std::is_pod<Vector4>::value, "kraken::Vector4 must be a POD type.");
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} // namespace kraken
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namespace std {
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template<>
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struct hash<kraken::Vector4> {
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public:
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size_t operator()(const kraken::Vector4 &s) const
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{
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size_t h1 = hash<float>()(s.x);
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size_t h2 = hash<float>()(s.y);
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size_t h3 = hash<float>()(s.z);
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size_t h4 = hash<float>()(s.w);
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return h1 ^ (h2 << 1) ^ (h3 << 2) ^ (h4 << 3);
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}
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};
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} // namespace std
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#endif // KRAKEN_VECTOR4_H
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