blob: 009fd84e3b95ac431fd1094ec25fda8bebd853f2 [file] [log] [blame]
* 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#pragma once
#include <math/vec2.h>
#include <math/half.h>
#include <stdint.h>
#include <sys/types.h>
#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 TVec3 : public TVecProductOperators<TVec3, T>,
public TVecAddOperators<TVec3, T>,
public TVecUnaryOperators<TVec3, T>,
public TVecComparisonOperators<TVec3, T>,
public TVecFunctions<TVec3, T>,
public TVecDebug<TVec3, T> {
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, z; };
struct { T s, t, p; };
struct { T r, g, b; };
TVec2<T> xy;
TVec2<T> st;
TVec2<T> rg;
static constexpr size_t SIZE = 3;
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);
return (&x)[i];
inline T& operator[](size_t i) {
assert(i < SIZE);
return (&x)[i];
// -----------------------------------------------------------------------
// we want the compiler generated versions for these...
TVec3(const TVec3&) = default;
~TVec3() = default;
TVec3& operator = (const TVec3&) = default;
// constructors
// leaves object uninitialized. use with caution.
constexpr TVec3(no_init) { }
// default constructor
constexpr TVec3() : x(0), y(0), z(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 TVec3(A v) : x(v), y(v), z(v) { }
template<typename A, typename B, typename C>
constexpr TVec3(A x, B y, C z) : x(x), y(y), z(z) { }
template<typename A, typename B>
constexpr TVec3(const TVec2<A>& v, B z) : x(v.x), y(v.y), z(z) { }
template<typename A>
constexpr TVec3(const TVec3<A>& v) : x(v.x), y(v.y), z(v.z) { }
// cross product works only on vectors of size 3
template <typename RT>
friend inline
constexpr TVec3 cross(const TVec3& u, const TVec3<RT>& v) {
return TVec3(
u.y*v.z - u.z*v.y,
u.z*v.x - u.x*v.z,
u.x*v.y - u.y*v.x);
} // namespace details
// ----------------------------------------------------------------------------------------
typedef details::TVec3<double> double3;
typedef details::TVec3<float> float3;
typedef details::TVec3<float> vec3;
typedef details::TVec3<half> half3;
typedef details::TVec3<int32_t> int3;
typedef details::TVec3<uint32_t> uint3;
typedef details::TVec3<int16_t> short3;
typedef details::TVec3<uint16_t> ushort3;
typedef details::TVec3<int8_t> byte3;
typedef details::TVec3<uint8_t> ubyte3;
typedef details::TVec3<bool> bool3;
// ----------------------------------------------------------------------------------------
} // namespace android
#pragma clang diagnostic pop