Template AxisAlignedBoundingBox on unit type

4 files changed, 27 insertions, 32 deletions

diff --git a/gfx/aabb.cpp b/gfx/aabb.cpp
deleted file mode 100644
index 19c2217..0000000
--- a/gfx/aabb.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "aabb.h"
-
-AxisAlignedBoundingBox &
-AxisAlignedBoundingBox::operator+=(const GlobalPosition3D & point)
-{
-	min = glm::min(min, point);
-	max = glm::max(max, point);
-	return *this;
-}
-
-AxisAlignedBoundingBox
-AxisAlignedBoundingBox::operator-(const GlobalPosition3D & viewPoint) const
-{
-	return {min - viewPoint, max - viewPoint};
-}
diff --git a/gfx/aabb.h b/gfx/aabb.h
index 229d516..a661f66 100644
--- a/gfx/aabb.h
+++ b/gfx/aabb.h
@@ -1,31 +1,41 @@
 #pragma once
 
-#include "config/types.h"
+#include "maths.h"
 #include <algorithm>
 #include <tuple>
 
-class AxisAlignedBoundingBox {
+template<Arithmetic T, glm::qualifier Q = glm::defaultp> class AxisAlignedBoundingBox {
 public:
+	using V = glm::vec<3, T, Q>;
 	AxisAlignedBoundingBox() = default;
 
-	AxisAlignedBoundingBox(const GlobalPosition3D & min, const GlobalPosition3D & max) : min {min}, max {max} { }
+	AxisAlignedBoundingBox(const V & min, const V & max) : min {min}, max {max} { }
 
-	AxisAlignedBoundingBox & operator+=(const GlobalPosition3D & point);
+	AxisAlignedBoundingBox &
+	operator+=(const V & point)
+	{
+		min = glm::min(min, point);
+		max = glm::max(max, point);
+		return *this;
+	}
 
-	AxisAlignedBoundingBox operator-(const GlobalPosition3D & viewPoint) const;
+	AxisAlignedBoundingBox
+	operator-(const V & viewPoint) const
+	{
+		return {min - viewPoint, max - viewPoint};
+	}
 
 	[[nodiscard]] static AxisAlignedBoundingBox
 	fromPoints(auto && points)
 	{
-		using Limits = std::numeric_limits<GlobalDistance>;
-		static constexpr const auto INITIAL
-				= std::make_pair(GlobalPosition3D {Limits::max()}, GlobalPosition3D {Limits::min()});
-		return std::make_from_tuple<AxisAlignedBoundingBox>(
+		using Limits = std::numeric_limits<T>;
+		static constexpr const auto INITIAL = std::make_pair(V {Limits::max()}, V {Limits::min()});
+		return std::make_from_tuple<AxisAlignedBoundingBox<T, Q>>(
 				std::ranges::fold_left(points, INITIAL, [](const auto & prev, const auto & point) {
 					auto & [min, max] = prev;
 					return std::make_pair(glm::min(min, point), glm::max(max, point));
 				}));
 	}
 
-	GlobalPosition3D min, max;
+	V min, max;
 };
diff --git a/gfx/frustum.cpp b/gfx/frustum.cpp
index 8031d85..865dcde 100644
--- a/gfx/frustum.cpp
+++ b/gfx/frustum.cpp
@@ -1,5 +1,4 @@
 #include "frustum.h"
-#include "aabb.h"
 #include <algorithm>
 #include <collections.h>
 #include <glm/ext/matrix_transform.hpp>
@@ -20,11 +19,11 @@ Frustum::updateView(const glm::mat4 & newView)
 }
 
 bool
-Frustum::contains(const AxisAlignedBoundingBox & aabb) const
+Frustum::contains(const BoundingBox & aabb) const
 {
 	static constexpr auto EXTENT_CORNER_IDXS = [] {
-		using Extent = GlobalPosition3D AxisAlignedBoundingBox::*;
-		constexpr auto EXTENTS = std::array {&AxisAlignedBoundingBox::min, &AxisAlignedBoundingBox::max};
+		using Extent = GlobalPosition3D BoundingBox::*;
+		constexpr auto EXTENTS = std::array {&BoundingBox::min, &BoundingBox::max};
 		std::array<glm::vec<3, Extent>, 2ZU * 2ZU * 2ZU> out {};
 		std::ranges::copy(std::views::cartesian_product(EXTENTS, EXTENTS, EXTENTS)
 						| std::views::transform(
diff --git a/gfx/frustum.h b/gfx/frustum.h
index 5ee7d2c..2624ba1 100644
--- a/gfx/frustum.h
+++ b/gfx/frustum.h
@@ -1,11 +1,10 @@
 #pragma once
 
+#include "aabb.h"
 #include "config/types.h"
 #include <array>
 #include <glm/mat4x4.hpp>
 
-class AxisAlignedBoundingBox;
-
 class Frustum {
 public:
 	Frustum(const GlobalPosition3D & pos, const glm::mat4 & view, const glm::mat4 & projection);
@@ -30,11 +29,13 @@ public:
 
 	void updateView(const glm::mat4 & view);
 
-	[[nodiscard]] bool contains(const AxisAlignedBoundingBox &) const;
+	using BoundingBox = AxisAlignedBoundingBox<GlobalDistance>;
+	[[nodiscard]] bool contains(const BoundingBox &) const;
 
 protected:
 	static constexpr size_t FACES = 6;
 	void updateCache();
+	[[nodiscard]] bool boundByPlanes(const BoundingBox &, size_t nplanes) const;
 
 	GlobalPosition3D position;
 	glm::mat4 view, projection;