edge planes )))bsp-edges

2 files changed, 29 insertions, 0 deletions

diff --git a/src/util/aabb.h b/src/util/aabb.h
index 96e40bf..9dc4b20 100644
--- a/src/util/aabb.h
+++ b/src/util/aabb.h
@@ -13,3 +13,23 @@ inline F32 aabb_support_radius( const AABB& aabb, const VEC3& dir ) {
   VEC3 half = aabb_half( aabb );
   return fabsf(dir.x) * half.x + fabsf(dir.y) * half.y + fabsf(dir.z) * half.z;
 }
+
+inline U8 aabb_intersects( const AABB& aabb, const AABB& other ) {
+  if (aabb.min.x > other.max.x || aabb.max.x < other.min.x)
+    return 0;
+  if (aabb.min.y > other.max.y || aabb.max.y < other.min.y)
+    return 0;
+  if (aabb.min.z > other.max.z || aabb.max.z < other.min.z)
+    return 0;
+  return 1;
+}
+
+inline U8 aabb_contains_point( const AABB& aabb, const VEC3& point ) {
+  if (point.x < aabb.min.x || point.x > aabb.max.x)
+    return 0;
+  if (point.y < aabb.min.y || point.y > aabb.max.y)
+    return 0;
+  if (point.z < aabb.min.z || point.z > aabb.max.z)
+    return 0;
+  return 1;
+}
diff --git a/src/util/vector.h b/src/util/vector.h
index 6065343..33409a7 100644
--- a/src/util/vector.h
+++ b/src/util/vector.h
@@ -119,6 +119,15 @@ struct VEC4 {
   VEC4 operator/( const F32& v ) { return VEC4( x / v, y / v, z / v, w / v ); }
 };
 
+static const VEC2 vec2_right   = { 1.f, 0.f };
+static const VEC2 vec2_forward = { 0.f, 1.f };
+static const VEC2 vec2_axis[]  = { vec2_right, vec2_forward };
+
+static const VEC3 vec3_up      = { 0.f, 0.f, 1.f };
+static const VEC3 vec3_right   = { 1.f, 0.f, 0.f };
+static const VEC3 vec3_forward = { 0.f, 1.f, 0.f };
+static const VEC3 vec3_axis[]  = { vec3_right, vec3_forward, vec3_up };
+
 inline U8 is_zero( VEC2 v ) { return v.x == 0.f && v.y == 0.f; }
 inline U8 is_zero( VEC3 v ) { return v.x == 0.f && v.y == 0.f && v.z == 0.f; }
 inline U8 is_zero( VEC4 v ) { return v.x == 0.f && v.y == 0.f && v.z == 0.f && v.w == 0.f; }