1 files changed, 35 insertions, 0 deletions

diff --git a/include/math/aabb2.h b/include/math/aabb2.h
new file mode 100644
index 0000000..edb6cb6
--- /dev/null
+++ b/include/math/aabb2.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include "vec2.h"
+
+#include <stddef.h>
+
+typedef struct aabb2 {
+  vec2 min;
+  vec2 max;
+} aabb2;
+
+/// Construct an AABB from min and max bounds.
+static inline aabb2 aabb2_make(vec2 min, vec2 max) {
+  return (aabb2){.min = min, .max = max};
+}
+
+/// Construct an AABB from an array of points.
+static inline aabb2 aabb2_from_array(const vec2 points[], size_t count) {
+  aabb2 box = (aabb2){0};
+  for (size_t i = 0; i < count; ++i) {
+    box.min = vec2_min(box.min, points[i]);
+    box.max = vec2_max(box.max, points[i]);
+  }
+  return box;
+}
+
+/// Add a point to the AABB. The AABB grows to contain the point.
+static inline aabb2 aabb2_add(aabb2 box, vec2 p) {
+  return (aabb2){.min = vec2_min(box.min, p), .max = vec2_max(box.max, p)};
+}
+
+/// Return the AABB of two AABBs.
+static inline aabb2 aabb2_sum(aabb2 a, aabb2 b) {
+  return (aabb2){.min = vec2_min(a.min, b.min), .max = vec2_max(a.max, b.max)};
+}