Cleanup.

examples/common/bounds.cpp

@@ -423,11 +423,6 @@ Ray makeRay(float _x, float _y, const float* _invVp)
 	return ray;
 }
 
-inline Vec3 getPointAt(const Ray& _ray, float _t)
-{
-	return mad(_ray.dir, _t, _ray.pos);
-}
-
 bool intersect(const Ray& _ray, const Aabb& _aabb, Hit* _hit)
 {
 	const Vec3 invDir = rcp(_ray.dir);
@@ -717,16 +712,13 @@ bool intersect(const Ray& _ray, const Cone& _cone, Hit* _hit)
 	return true;
 }
 
-bool intersect(const Ray& _ray, const Plane& _plane, Hit* _hit)
+bool intersect(const Ray& _ray, const Plane& _plane, bool _doublesided, Hit* _hit)
 {
-	const float dist = distance(_plane, _ray.pos);
-	if (0.0f > dist)
-	{
-		return false;
-	}
-
+	const float dist  = distance(_plane, _ray.pos);
 	const float ndotd = dot(_ray.dir, _plane.normal);
-	if (0.0f < ndotd)
+
+	if (!_doublesided
+	&& (0.0f > dist || 0.0f < ndotd) )
 	{
 		return false;
 	}

examples/common/bounds.h

@@ -82,6 +82,9 @@ struct Hit
 	bx::Plane plane = bx::init::None;
 };
 
+///
+bx::Vec3 getPointAt(const Ray& _ray, float _t);
+
 ///
 bx::Vec3 getCenter(const Aabb& _aabb);
 
@@ -169,6 +172,9 @@ bool intersect(const Ray& _ray, const Disk& _disk, Hit* _hit = NULL);
 /// Intersect ray / plane.
 bool intersect(const Ray& _ray, const bx::Plane& _plane, Hit* _hit = NULL);
 
+/// Intersect ray / plane.
+bool intersect(const Ray& _ray, const bx::Plane& _plane, bool _doublesided, Hit* _hit = NULL);
+
 /// Intersect ray / sphere.
 bool intersect(const Ray& _ray, const Sphere& _sphere, Hit* _hit = NULL);
 

examples/common/bounds.inl

@@ -7,6 +7,16 @@
 #	error "Must be included from bounds.h!"
 #endif // BOUNDS_H_HEADER_GUARD
 
+inline bx::Vec3 getPointAt(const Ray& _ray, float _t)
+{
+	return bx::mad(_ray.dir, _t, _ray.pos);
+}
+
+inline bool intersect(const Ray& _ray, const bx::Plane& _plane, Hit* _hit)
+{
+	return intersect(_ray, _plane, false, _hit);
+}
+
 inline bool overlap(const Aabb& _aabb, const Sphere& _sphere)
 {
 	return overlap(_sphere, _aabb);