| /* |
| * Copyright 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| #include <math/TVecHelpers.h> |
| #include <math/half.h> |
| #include <assert.h> |
| #include <stdint.h> |
| #include <sys/types.h> |
| #include <type_traits> |
| |
| #pragma clang diagnostic push |
| #pragma clang diagnostic ignored "-Wgnu-anonymous-struct" |
| #pragma clang diagnostic ignored "-Wnested-anon-types" |
| |
| namespace android { |
| // ------------------------------------------------------------------------------------- |
| |
| namespace details { |
| |
| template <typename T> |
| class TVec2 : public TVecProductOperators<TVec2, T>, |
| public TVecAddOperators<TVec2, T>, |
| public TVecUnaryOperators<TVec2, T>, |
| public TVecComparisonOperators<TVec2, T>, |
| public TVecFunctions<TVec2, T>, |
| public TVecDebug<TVec2, T> { |
| public: |
| enum no_init { NO_INIT }; |
| typedef T value_type; |
| typedef T& reference; |
| typedef T const& const_reference; |
| typedef size_t size_type; |
| |
| union { |
| struct { T x, y; }; |
| struct { T s, t; }; |
| struct { T r, g; }; |
| }; |
| |
| static constexpr size_t SIZE = 2; |
| inline constexpr size_type size() const { return SIZE; } |
| |
| // array access |
| inline constexpr T const& operator[](size_t i) const { |
| #if __cplusplus >= 201402L |
| // only possible in C++0x14 with constexpr |
| assert(i < SIZE); |
| #endif |
| return (&x)[i]; |
| } |
| |
| inline T& operator[](size_t i) { |
| assert(i < SIZE); |
| return (&x)[i]; |
| } |
| |
| // ----------------------------------------------------------------------- |
| // we want the compiler generated versions for these... |
| TVec2(const TVec2&) = default; |
| ~TVec2() = default; |
| TVec2& operator = (const TVec2&) = default; |
| |
| // constructors |
| |
| // leaves object uninitialized. use with caution. |
| explicit |
| constexpr TVec2(no_init) { } |
| |
| // default constructor |
| constexpr TVec2() : x(0), y(0) { } |
| |
| // handles implicit conversion to a tvec4. must not be explicit. |
| template<typename A, typename = typename std::enable_if<std::is_arithmetic<A>::value >::type> |
| constexpr TVec2(A v) : x(v), y(v) { } |
| |
| template<typename A, typename B> |
| constexpr TVec2(A x, B y) : x(x), y(y) { } |
| |
| template<typename A> |
| explicit |
| constexpr TVec2(const TVec2<A>& v) : x(v.x), y(v.y) { } |
| |
| // cross product works only on vectors of size 2 or 3 |
| template<typename RT> |
| friend inline |
| constexpr value_type cross(const TVec2& u, const TVec2<RT>& v) { |
| return value_type(u.x*v.y - u.y*v.x); |
| } |
| }; |
| |
| } // namespace details |
| |
| // ---------------------------------------------------------------------------------------- |
| |
| typedef details::TVec2<double> double2; |
| typedef details::TVec2<float> float2; |
| typedef details::TVec2<float> vec2; |
| typedef details::TVec2<half> half2; |
| typedef details::TVec2<int32_t> int2; |
| typedef details::TVec2<uint32_t> uint2; |
| typedef details::TVec2<int16_t> short2; |
| typedef details::TVec2<uint16_t> ushort2; |
| typedef details::TVec2<int8_t> byte2; |
| typedef details::TVec2<uint8_t> ubyte2; |
| typedef details::TVec2<bool> bool2; |
| |
| // ---------------------------------------------------------------------------------------- |
| } // namespace android |
| |
| #pragma clang diagnostic pop |