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ShaderPlayground / deps / glm / glm / gtx / scalar_multiplication.hpp
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1/// @ref gtx
2/// @file glm/gtx/scalar_multiplication.hpp
3/// @author Joshua Moerman
4///
5/// Include <glm/gtx/scalar_multiplication.hpp> to use the features of this extension.
6///
7/// Enables scalar multiplication for all types
8///
9/// Since GLSL is very strict about types, the following (often used) combinations do not work:
10/// double * vec4
11/// int * vec4
12/// vec4 / int
13/// So we'll fix that! Of course "float * vec4" should remain the same (hence the enable_if magic)
14
15#pragma once
16
17#include "../detail/setup.hpp"
18
19#ifndef GLM_ENABLE_EXPERIMENTAL
20# error "GLM: GLM_GTX_scalar_multiplication is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it."
21#endif
22
23#if !GLM_HAS_TEMPLATE_ALIASES && !(GLM_COMPILER & GLM_COMPILER_GCC)
24# error "GLM_GTX_scalar_multiplication requires C++11 support or alias templates and if not support for GCC"
25#endif
26
27#include "../vec2.hpp"
28#include "../vec3.hpp"
29#include "../vec4.hpp"
30#include "../mat2x2.hpp"
31#include <type_traits>
32
33namespace glm
34{
35 template<typename T, typename Vec>
36 using return_type_scalar_multiplication = typename std::enable_if<
37 !std::is_same<T, float>::value // T may not be a float
38 && std::is_arithmetic<T>::value, Vec // But it may be an int or double (no vec3 or mat3, ...)
39 >::type;
40
41#define GLM_IMPLEMENT_SCAL_MULT(Vec) \
42 template<typename T> \
43 return_type_scalar_multiplication<T, Vec> \
44 operator*(T const& s, Vec rh){ \
45 return rh *= static_cast<float>(s); \
46 } \
47 \
48 template<typename T> \
49 return_type_scalar_multiplication<T, Vec> \
50 operator*(Vec lh, T const& s){ \
51 return lh *= static_cast<float>(s); \
52 } \
53 \
54 template<typename T> \
55 return_type_scalar_multiplication<T, Vec> \
56 operator/(Vec lh, T const& s){ \
57 return lh *= 1.0f / s; \
58 }
59
60GLM_IMPLEMENT_SCAL_MULT(vec2)
61GLM_IMPLEMENT_SCAL_MULT(vec3)
62GLM_IMPLEMENT_SCAL_MULT(vec4)
63
64GLM_IMPLEMENT_SCAL_MULT(mat2)
65GLM_IMPLEMENT_SCAL_MULT(mat2x3)
66GLM_IMPLEMENT_SCAL_MULT(mat2x4)
67GLM_IMPLEMENT_SCAL_MULT(mat3x2)
68GLM_IMPLEMENT_SCAL_MULT(mat3)
69GLM_IMPLEMENT_SCAL_MULT(mat3x4)
70GLM_IMPLEMENT_SCAL_MULT(mat4x2)
71GLM_IMPLEMENT_SCAL_MULT(mat4x3)
72GLM_IMPLEMENT_SCAL_MULT(mat4)
73
74#undef GLM_IMPLEMENT_SCAL_MULT
75} // namespace glm