slight modifications

include/ITAPropagationPathSim/RayTracing/RTEngine.h

@@ -80,8 +80,16 @@ namespace ITAPropagationPathSim
 			  * @param[in] hFace: Face handle for identifying the corresponding reflection face
 			  * @param[in] v3ReflectionPoint: Point of specular reflection on the face
 			  */
-			//void ReflectRayOnFace(VistaRay& rRay, CITAMesh* pMesh, CITAMesh::FaceHandle hFace, VistaVector3D& v3ReflectionPoint);
+			void ReflectRayOnFace(VistaRay& rRay, CITAMesh *pMesh, CITAMesh::FaceHandle hFace, VistaVector3D& v3ReflectionPoint);
 
+			//! Checks for intersection of a ray with a sphere
+			/**
+			  * @return: true if an intersection is given
+			  * @param[in] rRay: ray
+			  * @param[in] pDetectionSphereCenter: center of detection sphere
+			  * @param[in] fDetectionSphereRadius: radius of detection sphere
+			  */
+			bool RayDetectionSphereIntersectionTest(const VistaRay& rRay, std::shared_ptr< ITAGeo::CPropagationAnchor > pDetectionSphereCenter, float fDetectionSphereRadius, VistaVector3D& v3DetectionPoint);
 
 			//! Audibility test for images up to given maximum order with or without culling
 			/**

src/ITAPropagationPathSim/RayTracing/RTEngine.cpp

@@ -47,7 +47,7 @@ unsigned long int CEngine::GetNumberOfFaces() const
 	return ( int ) pMesh->n_faces();
 }
 
-bool RayDetectionSphereIntersectionTest(VistaRay rRay, std::shared_ptr< ITAGeo::CPropagationAnchor > pDestination, float fDetectionSphereRadius, VistaVector3D& v3DetectionPoint)
+bool CEngine::RayDetectionSphereIntersectionTest(const VistaRay& rRay, std::shared_ptr< ITAGeo::CPropagationAnchor > pDestination, float fDetectionSphereRadius, VistaVector3D& v3DetectionPoint)
 {
 	VistaVector3D v3RayOrigin2RcvPos = pDestination->v3InteractionPoint - rRay.GetOrigin();
 	
@@ -60,7 +60,7 @@ bool RayDetectionSphereIntersectionTest(VistaRay rRay, std::shared_ptr< ITAGeo::
 	//return (abs(v3RayOrigin2RcvPos.GetLength() * sin(tDeviationAngle)) < fDetectionSphereRadius);
 }
 
-void ReflectRayOnFace(VistaRay& rRay, CITAMesh* pMesh, CITAMesh::FaceHandle hFace, VistaVector3D& v3ReflectionPoint)
+void CEngine::ReflectRayOnFace(VistaRay& rRay, CITAMesh* pMesh, CITAMesh::FaceHandle hFace, VistaVector3D& v3ReflectionPoint)
 {
 	assert(pMesh->has_face_normals());
 
@@ -126,7 +126,7 @@ void CEngine::Run( std::shared_ptr< ITAGeo::CPropagationAnchor > pSource, std::s
 				if (bFaceIntersectedByRay)
 				{
 					// Reflect ray on face
-					ReflectRayOnFace(rRay, pMesh, hFace, v3ReflectionPoint); //@todo: should this function be a method of class CEngine?
+					ReflectRayOnFace(rRay, pMesh, hFace, v3ReflectionPoint); //@todo: should this function be a method of this class?
 
 					// Update path
 					auto pReflection = std::make_shared<ITAGeo::CSpecularReflection>(v3ReflectionPoint);