scalar_multiplication.hpp

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#pragma once

#include "../detail/setup.hpp"

#ifndef GLM_ENABLE_EXPERIMENTAL
#       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."
#endif

#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