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VulkanExample / dep / include / glm / gtx / scalar_multiplication.hpp
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1/// @ref gtx_scalar_multiplication
2/// @file glm/gtx/scalar_multiplication.hpp
3/// @author Joshua Moerman
4///
5/// @defgroup gtx_scalar_multiplication GLM_GTX_scalar_multiplication
6/// @ingroup gtx
7///
8/// Include <glm/gtx/scalar_multiplication.hpp> to use the features of this extension.
9///
10/// Enables scalar multiplication for all types
11///
12/// Since GLSL is very strict about types, the following (often used) combinations do not work:
13/// double * vec4
14/// int * vec4
15/// vec4 / int
16/// So we'll fix that! Of course "float * vec4" should remain the same (hence the enable_if magic)
17
18#pragma once
19
20#include "../detail/setup.hpp"
21
22#ifndef GLM_ENABLE_EXPERIMENTAL
23# 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."
24#elif GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
25# pragma message("GLM: GLM_GTX_scalar_multiplication extension included")
26#endif
27
28#include "../vec2.hpp"
29#include "../vec3.hpp"
30#include "../vec4.hpp"
31#include "../mat2x2.hpp"
32#include <type_traits>
33
34namespace glm
35{
36 /// @addtogroup gtx_scalar_multiplication
37 /// @{
38
39 template<typename T, typename Vec>
40 using return_type_scalar_multiplication = typename std::enable_if<
41 !std::is_same<T, float>::value // T may not be a float
42 && std::is_arithmetic<T>::value, Vec // But it may be an int or double (no vec3 or mat3, ...)
43 >::type;
44
45#define GLM_IMPLEMENT_SCAL_MULT(Vec) \
46 template<typename T> \
47 return_type_scalar_multiplication<T, Vec> \
48 operator*(T const& s, Vec rh){ \
49 return rh *= static_cast<float>(s); \
50 } \
51 \
52 template<typename T> \
53 return_type_scalar_multiplication<T, Vec> \
54 operator*(Vec lh, T const& s){ \
55 return lh *= static_cast<float>(s); \
56 } \
57 \
58 template<typename T> \
59 return_type_scalar_multiplication<T, Vec> \
60 operator/(Vec lh, T const& s){ \
61 return lh *= 1.0f / static_cast<float>(s); \
62 }
63
64GLM_IMPLEMENT_SCAL_MULT(vec2)
65GLM_IMPLEMENT_SCAL_MULT(vec3)
66GLM_IMPLEMENT_SCAL_MULT(vec4)
67
68GLM_IMPLEMENT_SCAL_MULT(mat2)
69GLM_IMPLEMENT_SCAL_MULT(mat2x3)
70GLM_IMPLEMENT_SCAL_MULT(mat2x4)
71GLM_IMPLEMENT_SCAL_MULT(mat3x2)
72GLM_IMPLEMENT_SCAL_MULT(mat3)
73GLM_IMPLEMENT_SCAL_MULT(mat3x4)
74GLM_IMPLEMENT_SCAL_MULT(mat4x2)
75GLM_IMPLEMENT_SCAL_MULT(mat4x3)
76GLM_IMPLEMENT_SCAL_MULT(mat4)
77
78#undef GLM_IMPLEMENT_SCAL_MULT
79 /// @}
80} // namespace glm