Move game sources into src subdirectory

1 files changed, 47 insertions, 0 deletions

diff --git a/src/core/vectors.hh b/src/core/vectors.hh
new file mode 100644
index 0000000..a6e9c75
--- /dev/null
+++ b/src/core/vectors.hh
@@ -0,0 +1,47 @@
+#ifndef CORE_VECTORS_HH
+#define CORE_VECTORS_HH 1
+#pragma once
+
+#include "core/concepts.hh"
+
+// core/vectors.hh - because NO ONE would POSSIBLY
+// need integer-based distance calculations in a
+// game about voxels. That would be INSANE! :D
+
+namespace vx
+{
+template<vx::Arithmetic T>
+constexpr static inline const T length2(const glm::vec<2, T>& vector);
+template<vx::Arithmetic T>
+constexpr static inline const T length2(const glm::vec<3, T>& vector);
+template<vx::Arithmetic T>
+constexpr static inline const T distance2(const glm::vec<2, T>& vector_a, const glm::vec<2, T>& vector_b);
+template<vx::Arithmetic T>
+constexpr static inline const T distance2(const glm::vec<3, T>& vector_a, const glm::vec<3, T>& vector_b);
+} // namespace vx
+
+template<vx::Arithmetic T>
+constexpr static inline const T vx::length2(const glm::vec<2, T>& vector)
+{
+    return (vector.x * vector.x) + (vector.y * vector.y);
+}
+
+template<vx::Arithmetic T>
+constexpr static inline const T vx::length2(const glm::vec<3, T>& vector)
+{
+    return (vector.x * vector.x) + (vector.y * vector.y) + (vector.z * vector.z);
+}
+
+template<vx::Arithmetic T>
+constexpr static inline const T vx::distance2(const glm::vec<2, T>& vector_a, const glm::vec<2, T>& vector_b)
+{
+    return vx::length2(vector_a - vector_b);
+}
+
+template<vx::Arithmetic T>
+constexpr static inline const T vx::distance2(const glm::vec<3, T>& vector_a, const glm::vec<3, T>& vector_b)
+{
+    return vx::length2(vector_a - vector_b);
+}
+
+#endif /* CORE_VECTORS_HH */