mirror of
https://github.com/yuzu-emu/FasTC.git
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479ba8e76d
Most notably, we need to actually fix a bug in MSVC that doesn't know how to properly instantiate enums in partial template specialization. There are more details outlined here: http://stackoverflow.com/questions/15466594/why-does-msvc-fail-to-compile-this-template-function The fix in this commit closes #10 Also in this commit is a hacky way to allow GL defines. Apparently "LoadImage" is defined as a macro even with WIN32_LEAN_AND_MEAN. This means that we have to #undef the code that includes it, meaning that we also need to make sure not to actually mix GLDefines.h with any file that needs to use the functions from Windows.h
300 lines
8.8 KiB
C++
300 lines
8.8 KiB
C++
/*******************************************************************************
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* Copyright (c) 2012 Pavel Krajcevski
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*
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******************************************************************************/
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#ifndef BASE_INCLUDE_VECTORBASE_H_
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#define BASE_INCLUDE_VECTORBASE_H_
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// !FIXME! For sqrt function. This increases compilation time by a LOT
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// but I couldn't guarantee any faster general-purpose implementation
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#include <cmath>
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namespace FasTC {
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enum EVectorType {
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eVectorType_Scalar,
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eVectorType_Vector,
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eVectorType_Matrix
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};
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template <typename T, const int N>
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class VectorBase {
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protected:
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// Vector representation
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T vec[N];
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public:
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typedef T ScalarType;
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VectorBase() { }
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VectorBase(const VectorBase<T, N> &other) {
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for(int i = 0; i < N; i++) vec[i] = other[i];
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}
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explicit VectorBase(const T *_vec) {
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for(int i = 0; i < N; i++) {
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vec[i] = _vec[i];
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}
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}
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static const int Size = N;
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// Accessors
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T &operator()(int idx) { return vec[idx]; }
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T &operator[](int idx) { return vec[idx]; }
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const T &operator()(int idx) const { return vec[idx]; }
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const T &operator[](int idx) const { return vec[idx]; }
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// Allow casts to the respective array representation...
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operator const T *() const { return vec; }
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VectorBase<T, N> &operator=(const T *v) {
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for(int i = 0; i < N; i++)
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vec[i] = v[i];
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return *this;
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}
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// Allows casting to other vector types if the underlying type system does as well...
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template<typename _T>
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operator VectorBase<_T, N>() const {
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VectorBase<_T, N> ret;
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for(int i = 0; i < N; i++) {
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ret[i] = static_cast<_T>(vec[i]);
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}
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return ret;
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}
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// Vector operations
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template<typename _T>
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T Dot(const VectorBase<_T, N> &v) const {
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T sum = 0;
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for(int i = 0; i < N; i++)
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sum += vec[i] * v[i];
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return sum;
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}
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T LengthSq() const { return this->Dot(*this); }
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T Length() const { return static_cast<T>(sqrt(LengthSq())); }
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void Normalize() {
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T len = Length();
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for(int i = 0; i < N; i++) {
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vec[i] /= len;
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}
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}
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};
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// Operators
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template<typename VectorTypeOne, typename VectorTypeTwo>
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static inline VectorTypeOne VectorAddition(const VectorTypeOne &v1,
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const VectorTypeTwo &v2) {
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VectorTypeOne a(v1);
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for(int i = 0; i < VectorTypeOne::Size; i++) {
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a(i) += static_cast<VectorTypeOne::ScalarType>(v2[i]);
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}
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return a;
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}
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template<typename VectorTypeOne, typename VectorTypeTwo>
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static inline VectorTypeOne operator+(const VectorTypeOne &v1,
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const VectorTypeTwo &v2) {
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return VectorAddition(v1, v2);
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}
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template<typename VectorTypeOne, typename VectorTypeTwo>
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static inline VectorTypeOne &operator+=(VectorTypeOne &v1,
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const VectorTypeTwo &v2) {
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return v1 = VectorAddition(v1, v2);
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}
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template<typename VectorTypeOne, typename VectorTypeTwo>
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static inline VectorTypeOne VectorSubtraction(const VectorTypeOne &v1,
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const VectorTypeTwo &v2) {
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VectorTypeOne a(v1);
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for(int i = 0; i < VectorTypeOne::Size; i++) {
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a(i) -= static_cast<VectorTypeOne::ScalarType>(v2[i]);
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}
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return a;
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}
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template<typename VectorTypeOne, typename VectorTypeTwo>
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static inline VectorTypeOne operator-(const VectorTypeOne &v1,
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const VectorTypeTwo &v2) {
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return VectorSubtraction(v1, v2);
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}
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template<typename VectorTypeOne, typename VectorTypeTwo>
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static inline VectorTypeOne &operator-=(VectorTypeOne &v1,
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const VectorTypeTwo &v2) {
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return v1 = VectorSubtraction(v1, v2);
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}
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template<typename T>
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class VectorTraits {
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public:
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static const EVectorType kVectorType = eVectorType_Scalar;
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};
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template<typename T, const int N>
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class VectorTraits<VectorBase<T, N> > {
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public:
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static const EVectorType kVectorType = eVectorType_Vector;
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};
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#define REGISTER_VECTOR_TYPE(TYPE) \
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template<> \
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class VectorTraits< TYPE > { \
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public: \
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static const EVectorType kVectorType = eVectorType_Vector; \
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}
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#define REGISTER_ONE_TEMPLATE_VECTOR_TYPE(TYPE) \
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template<typename T> \
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class VectorTraits< TYPE <T> > { \
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public: \
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static const EVectorType kVectorType = eVectorType_Vector; \
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}
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template<typename VectorType, typename ScalarType>
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static inline VectorType ScalarMultiply(const VectorType &v, const ScalarType &s) {
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VectorType a(v);
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for(int i = 0; i < VectorType::Size; i++)
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a(i) = static_cast<typename VectorType::ScalarType>(a(i) * s);
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return a;
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}
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// !WTF! MSVC bug with enums in template parameters =(
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template<
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/* EVectorType */unsigned kVectorTypeOne,
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/* EVectorType */unsigned kVectorTypeTwo,
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typename TypeOne,
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typename TypeTwo>
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class MultSwitch {
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private:
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const TypeOne &m_A;
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const TypeTwo &m_B;
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public:
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typedef TypeOne ResultType;
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MultSwitch(const TypeOne &a, const TypeTwo &b)
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: m_A(a), m_B(b) { }
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ResultType GetMultiplication() const { return m_A * m_B; }
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};
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template<typename TypeOne, typename TypeTwo>
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class MultSwitch<
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eVectorType_Scalar,
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eVectorType_Vector,
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TypeOne, TypeTwo> {
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private:
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const TypeOne &m_A;
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const TypeTwo &m_B;
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public:
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typedef TypeTwo ResultType;
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MultSwitch(const TypeOne &a, const TypeTwo &b)
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: m_A(a), m_B(b) { }
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ResultType GetMultiplication() const { return ScalarMultiply(m_B, m_A); }
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};
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template<typename TypeOne, typename TypeTwo>
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class MultSwitch<
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eVectorType_Vector,
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eVectorType_Scalar,
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TypeOne, TypeTwo> {
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private:
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const TypeOne &m_A;
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const TypeTwo &m_B;
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public:
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typedef TypeOne ResultType;
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MultSwitch(const TypeOne &a, const TypeTwo &b)
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: m_A(a), m_B(b) { }
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ResultType GetMultiplication() const { return ScalarMultiply(m_A, m_B); }
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};
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template<typename TypeOne, typename TypeTwo>
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class MultSwitch<
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eVectorType_Vector,
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eVectorType_Vector,
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TypeOne, TypeTwo> {
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private:
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const TypeOne &m_A;
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const TypeTwo &m_B;
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public:
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typedef typename TypeOne::ScalarType ResultType;
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MultSwitch(const TypeOne &a, const TypeTwo &b)
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: m_A(a), m_B(b) { }
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ResultType GetMultiplication() const { return m_A.Dot(m_B); }
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};
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template<typename TypeOne, typename TypeTwo>
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static inline
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typename MultSwitch<
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VectorTraits<TypeOne>::kVectorType,
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VectorTraits<TypeTwo>::kVectorType,
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TypeOne, TypeTwo
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>::ResultType
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operator*(const TypeOne &v1, const TypeTwo &v2) {
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typedef MultSwitch<
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VectorTraits<TypeOne>::kVectorType,
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VectorTraits<TypeTwo>::kVectorType,
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TypeOne, TypeTwo
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> VSwitch;
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return VSwitch(v1, v2).GetMultiplication();
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}
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template<typename VectorType, typename ScalarType>
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static inline VectorType &operator*=(VectorType &v, const ScalarType &s) {
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return v = v * s;
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}
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template<typename VectorType, typename ScalarType>
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static inline VectorType ScalarDivide(const VectorType &v, const ScalarType &s) {
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VectorType a(v);
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for(int i = 0; i < VectorType::Size; i++)
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a(i) = static_cast<typename VectorType::ScalarType>(a(i) / s);
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return a;
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}
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template<typename TypeOne, typename TypeTwo>
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static inline TypeOne operator/(const TypeOne &v1, const TypeTwo &v2) {
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return ScalarDivide(v1, v2);
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}
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template<typename VectorType, typename ScalarType>
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static inline VectorType &operator/=(VectorType &v, const ScalarType &s) {
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return v = ScalarDivide(v, s);
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}
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};
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#endif // BASE_INCLUDE_VECTORBASE_H_
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