From eeca0c03394f158631be6c01d7e852cfbcd22a70 Mon Sep 17 00:00:00 2001
From: Sam Hocevar <sam@hocevar.net>
Date: Wed, 20 Feb 2013 12:22:05 +0000
Subject: [PATCH] math: add Box2D and Box3D classes.

---
 src/lol/math/geometry.h | 53 ++++++++++++++++++++++++++++-------------
 1 file changed, 37 insertions(+), 16 deletions(-)

diff --git a/src/lol/math/geometry.h b/src/lol/math/geometry.h
index 61f172ee..f6d1c662 100644
--- a/src/lol/math/geometry.h
+++ b/src/lol/math/geometry.h
@@ -27,27 +27,48 @@
 
 namespace lol
 {
-    bool TriangleIsectTriangle(vec3 const &v00, vec3 const &v01, vec3 const &v02,
-                               vec3 const &v10, vec3 const &v11, vec3 const &v12,
-                               vec3 &iP00, vec3 &iP10);
-    bool RayIsectTriangleSide(vec3 const &v0, vec3 const &v1, vec3 const &v2,
-                              vec3 const &iP0, vec3 const &iP1,
-                              vec3 &iV0, int &iIdx0, vec3 &iV1, int &iIdx1);
-    bool RayIsectTriangle(vec3 const &rayP, vec3 const &rayD,
-                          vec3 const &triV0, vec3 const &triV1, vec3 const &triV2,
-                          vec3 &vi);
+
+struct Box2D
+{
+    inline Box2D(vec2 a, vec2 b)
+      : A(a),
+        B(b)
+    {}
+
+    vec2 A, B;
+};
+
+struct Box3D
+{
+    inline Box3D(vec3 a, vec3 b)
+      : A(a),
+        B(b)
+    {}
+
+    vec3 A, B;
+};
+
+bool TriangleIsectTriangle(vec3 const &v00, vec3 const &v01, vec3 const &v02,
+                           vec3 const &v10, vec3 const &v11, vec3 const &v12,
+                           vec3 &iP00, vec3 &iP10);
+bool RayIsectTriangleSide(vec3 const &v0, vec3 const &v1, vec3 const &v2,
+                          vec3 const &iP0, vec3 const &iP1,
+                          vec3 &iV0, int &iIdx0, vec3 &iV1, int &iIdx1);
+bool RayIsectTriangle(vec3 const &rayP, vec3 const &rayD,
+                      vec3 const &triV0, vec3 const &triV1, vec3 const &triV2,
+                      vec3 &vi);
 #define RAY_ISECT_NOTHING   0
 #define RAY_ISECT_ALL       1
 #define RAY_ISECT_NONE      2
 #define RAY_ISECT_P0        3
 #define RAY_ISECT_P1        4
-    int RayIsectRay(vec3 const &rayP00, vec3 const &rayP01,
-                    vec3 const &rayP10, vec3 const &rayP11,
-                    vec3 &vIsec);
-    vec3 ProjPointOnPlane(vec3 const &point, vec3 const &planeP, vec3 const &planeN);
-    bool RayIsectPlane(vec3 const &rayP0, vec3 const &rayP1,
-                       vec3 const &planeP, vec3 const &planeN,
-                       vec3 &vIsec, bool test_line_only = false);
+int RayIsectRay(vec3 const &rayP00, vec3 const &rayP01,
+                vec3 const &rayP10, vec3 const &rayP11,
+                vec3 &vIsec);
+vec3 ProjPointOnPlane(vec3 const &point, vec3 const &planeP, vec3 const &planeN);
+bool RayIsectPlane(vec3 const &rayP0, vec3 const &rayP1,
+                   vec3 const &planeP, vec3 const &planeN,
+                   vec3 &vIsec, bool test_line_only = false);
 
 } /* namespace lol */