Create AxisAlignedBoundingBox

Used to define the extents of GeoData mesh

1 files changed, 24 insertions, 0 deletions

diff --git a/gfx/aabb.cpp b/gfx/aabb.cpp
new file mode 100644
index 0000000..862dacb
--- /dev/null
+++ b/gfx/aabb.cpp
@@ -0,0 +1,24 @@
+#include "aabb.h"
+#include <algorithm>
+#include <tuple>
+
+AxisAlignedBoundingBox
+AxisAlignedBoundingBox::fromPoints(const std::span<const GlobalPosition3D> 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>(
+			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));
+			}));
+}
+
+AxisAlignedBoundingBox &
+AxisAlignedBoundingBox::operator+=(const GlobalPosition3D & point)
+{
+	min = glm::min(min, point);
+	max = glm::max(max, point);
+	return *this;
+}