1 files changed, 35 insertions, 0 deletions

diff --git a/include/math/aabb3.h b/include/math/aabb3.h
new file mode 100644
index 0000000..0b0005c
--- /dev/null
+++ b/include/math/aabb3.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include "vec3.h"
+
+#include <stddef.h>
+
+typedef struct aabb3 {
+  vec3 min;
+  vec3 max;
+} aabb3;
+
+/// Construct an AABB from min and max bounds.
+static inline aabb3 aabb3_make(vec3 min, vec3 max) {
+  return (aabb3){.min = min, .max = max};
+}
+
+/// Construct an AABB from an array of points.
+static inline aabb3 aabb3_from_array(const vec3 points[], size_t count) {
+  aabb3 box = (aabb3){0};
+  for (size_t i = 0; i < count; ++i) {
+    box.min = vec3_min(box.min, points[i]);
+    box.max = vec3_max(box.max, points[i]);
+  }
+  return box;
+}
+
+/// Add a point to the AABB. The AABB grows to contain the point.
+static inline aabb3 aabb3_add(aabb3 box, vec3 p) {
+  return (aabb3){.min = vec3_min(box.min, p), .max = vec3_max(box.max, p)};
+}
+
+/// Return the AABB of two AABBs.
+static inline aabb3 aabb3_sum(aabb3 a, aabb3 b) {
+  return (aabb3){.min = vec3_min(a.min, b.min), .max = vec3_max(a.max, b.max)};
+}