X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=laserbrain_demo;a=blobdiff_plain;f=src%2Fgeom.cc;h=a96066fba377a03fc754a7f74fc7eac8398ad35a;hp=3a287a6a9a65289372a84d4736ef20c201a92ebb;hb=74034a459f47934ef60ba295033b9cb7e597d32a;hpb=6ecd4ecfa020964e4250bf9322c1a26ac4073b76

diff --git a/src/geom.cc b/src/geom.cc
index 3a287a6..a96066f 100644
--- a/src/geom.cc
+++ b/src/geom.cc
@@ -1,5 +1,6 @@
-#include <algorithm>
+#include <stdlib.h>
 #include <float.h>
+#include <algorithm>
 #include "geom.h"
 #include "app.h"
 
@@ -144,6 +145,29 @@ Vec3 AABox::get_corner(int idx) const
 	return Vec3(v[xidx[idx]].x, v[yidx[idx]].y, v[zidx[idx]].z);
 }
 
+Plane AABox::get_plane(int pidx) const
+{
+	Vec3 c = (max - min) * 0.5f;
+	switch(pidx) {
+	case AABOX_PLANE_PX:
+		return Plane(Vec3(max.x, c.y, c.z), Vec3(1, 0, 0));
+	case AABOX_PLANE_NX:
+		return Plane(Vec3(min.x, c.y, c.z), Vec3(-1, 0, 0));
+	case AABOX_PLANE_PY:
+		return Plane(Vec3(c.x, max.x, c.z), Vec3(0, 1, 0));
+	case AABOX_PLANE_NY:
+		return Plane(Vec3(c.x, min.x, c.z), Vec3(0, -1, 0));
+	case AABOX_PLANE_PZ:
+		return Plane(Vec3(c.x, c.y, max.z), Vec3(0, 0, 1));
+	case AABOX_PLANE_NZ:
+		return Plane(Vec3(c.x, c.y, min.z), Vec3(0, 0, -1));
+	default:
+		break;
+	}
+	abort();
+	return Plane();
+}
+
 bool AABox::intersect(const Ray &ray, HitPoint *hit) const
 {
 	Vec3 param[2] = {min, max};