| /// @ref gtx |
| /// @file glm/gtx/scalar_multiplication.hpp |
| /// @author Joshua Moerman |
| /// |
| /// @brief Enables scalar multiplication for all types |
| /// |
| /// Since GLSL is very strict about types, the following (often used) combinations do not work: |
| /// double * vec4 |
| /// int * vec4 |
| /// vec4 / int |
| /// So we'll fix that! Of course "float * vec4" should remain the same (hence the enable_if magic) |
| |
| #pragma once |
| |
| #include "../detail/setup.hpp" |
| |
| #if !GLM_HAS_TEMPLATE_ALIASES && !(GLM_COMPILER & GLM_COMPILER_GCC) |
| # error "GLM_GTX_scalar_multiplication requires C++11 support or alias templates and if not support for GCC" |
| #endif |
| |
| #include "../vec2.hpp" |
| #include "../vec3.hpp" |
| #include "../vec4.hpp" |
| #include "../mat2x2.hpp" |
| #include <type_traits> |
| |
| namespace glm |
| { |
| template <typename T, typename Vec> |
| using return_type_scalar_multiplication = typename std::enable_if< |
| !std::is_same<T, float>::value // T may not be a float |
| && std::is_arithmetic<T>::value, Vec // But it may be an int or double (no vec3 or mat3, ...) |
| >::type; |
| |
| #define GLM_IMPLEMENT_SCAL_MULT(Vec) \ |
| template <typename T> \ |
| return_type_scalar_multiplication<T, Vec> \ |
| operator*(T const & s, Vec rh){ \ |
| return rh *= static_cast<float>(s); \ |
| } \ |
| \ |
| template <typename T> \ |
| return_type_scalar_multiplication<T, Vec> \ |
| operator*(Vec lh, T const & s){ \ |
| return lh *= static_cast<float>(s); \ |
| } \ |
| \ |
| template <typename T> \ |
| return_type_scalar_multiplication<T, Vec> \ |
| operator/(Vec lh, T const & s){ \ |
| return lh *= 1.0f / s; \ |
| } |
| |
| GLM_IMPLEMENT_SCAL_MULT(vec2) |
| GLM_IMPLEMENT_SCAL_MULT(vec3) |
| GLM_IMPLEMENT_SCAL_MULT(vec4) |
| |
| GLM_IMPLEMENT_SCAL_MULT(mat2) |
| GLM_IMPLEMENT_SCAL_MULT(mat2x3) |
| GLM_IMPLEMENT_SCAL_MULT(mat2x4) |
| GLM_IMPLEMENT_SCAL_MULT(mat3x2) |
| GLM_IMPLEMENT_SCAL_MULT(mat3) |
| GLM_IMPLEMENT_SCAL_MULT(mat3x4) |
| GLM_IMPLEMENT_SCAL_MULT(mat4x2) |
| GLM_IMPLEMENT_SCAL_MULT(mat4x3) |
| GLM_IMPLEMENT_SCAL_MULT(mat4) |
| |
| #undef GLM_IMPLEMENT_SCAL_MULT |
| } // namespace glm |