diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/pch.hh | 2 | ||||
| -rw-r--r-- | core/vectors.hh | 49 |
2 files changed, 50 insertions, 1 deletions
diff --git a/core/pch.hh b/core/pch.hh index a2199a2..9bd9c43 100644 --- a/core/pch.hh +++ b/core/pch.hh @@ -34,8 +34,8 @@ #include <glm/vec3.hpp> #include <glm/vec4.hpp> -#include <glm/gtc/quaternion.hpp> #include <glm/gtc/matrix_transform.hpp> +#include <glm/gtc/quaternion.hpp> #include <glm/gtc/type_ptr.hpp> #include <physfs.h> diff --git a/core/vectors.hh b/core/vectors.hh new file mode 100644 index 0000000..e6e185a --- /dev/null +++ b/core/vectors.hh @@ -0,0 +1,49 @@ +#ifndef CORE_VECTORS_HH +#define CORE_VECTORS_HH 1 +#pragma once + +// cxvectors.hh - because NO ONE would POSSIBLY +// need integer-based distance calculations in a +// game about voxels. That would be INSANE! :D + +namespace cxvectors +{ +template<typename value_type> +constexpr static inline const value_type length2(const glm::vec<2, value_type> &vector); +template<typename value_type> +constexpr static inline const value_type length2(const glm::vec<3, value_type> &vector); +template<typename value_type> +constexpr static inline const value_type distance2(const glm::vec<2, value_type> &vector_a, const glm::vec<2, value_type> &vector_b); +template<typename value_type> +constexpr static inline const value_type distance2(const glm::vec<3, value_type> &vector_a, const glm::vec<3, value_type> &vector_b); +} // namespace cxvectors + +template<typename value_type> +constexpr static inline const value_type cxvectors::length2(const glm::vec<2, value_type> &vector) +{ + static_assert(std::is_arithmetic_v<value_type>); + return (vector.x * vector.x) + (vector.y * vector.y); +} + +template<typename value_type> +constexpr static inline const value_type cxvectors::length2(const glm::vec<3, value_type> &vector) +{ + static_assert(std::is_arithmetic_v<value_type>); + return (vector.x * vector.x) + (vector.y * vector.y) + (vector.z * vector.z); +} + +template<typename value_type> +constexpr static inline const value_type cxvectors::distance2(const glm::vec<2, value_type> &vector_a, const glm::vec<2, value_type> &vector_b) +{ + static_assert(std::is_arithmetic_v<value_type>); + return cxvectors::length2(vector_a - vector_b); +} + +template<typename value_type> +constexpr static inline const value_type cxvectors::distance2(const glm::vec<3, value_type> &vector_a, const glm::vec<3, value_type> &vector_b) +{ + static_assert(std::is_arithmetic_v<value_type>); + return cxvectors::length2(vector_a - vector_b); +} + +#endif /* CORE_VECTORS_HH */ |