Merge branch 'master' into v0.6.0

src/ifcgeom/IfcGeom.h

@@ -221,7 +221,8 @@ private:
 	double ifc_planeangle_unit;
 	double modelling_precision;
 	double dimensionality;
-	
+	double layerset_first;
+
 #ifndef NO_CACHE
 	MAKE_TYPE_NAME(Cache) cache;
 #endif
@@ -259,7 +260,7 @@ public:
 		setValue(GV_PLANEANGLE_UNIT,          other.getValue(GV_PLANEANGLE_UNIT));
 		setValue(GV_PRECISION,                other.getValue(GV_PRECISION));
 		setValue(GV_DIMENSIONALITY,           other.getValue(GV_DIMENSIONALITY));
-		setValue(GV_DEFLECTION_TOLERANCE,     other.getValue(GV_DEFLECTION_TOLERANCE));
+		setValue(GV_LAYERSET_FIRST,           other.getValue(GV_LAYERSET_FIRST));
 		return *this;
 	}
 

src/ifcgeom/IfcGeomFunctions.cpp

@@ -1317,6 +1317,9 @@ void IfcGeom::Kernel::setValue(GeomValue var, double value) {
 	case GV_MAX_FACES_TO_ORIENT:
 		max_faces_to_orient = value;
 		break;
+	case GV_LAYERSET_FIRST:
+		layerset_first = value;
+		break;
 	default:
 		throw std::runtime_error("Invalid setting");
 	}
@@ -1342,6 +1345,8 @@ double IfcGeom::Kernel::getValue(GeomValue var) const {
 		return dimensionality;
 	case GV_MAX_FACES_TO_ORIENT:
 		return max_faces_to_orient;
+	case GV_LAYERSET_FIRST:
+		return layerset_first;
 	}
 	throw std::runtime_error("Invalid setting");
 }
@@ -1644,11 +1649,11 @@ const IfcSchema::IfcMaterial* IfcGeom::Kernel::get_single_material_association(c
 		IfcSchema::IfcMaterialSelect* associated_material = (*associated_materials->begin())->RelatingMaterial();
 		single_material = associated_material->as<IfcSchema::IfcMaterial>();
 
-		// NB: Single-layer layersets are also considered, regardless of --enable-layerset-slicing, this
-		// in accordance with other viewers.
+		// NB: IfcMaterialLayerSets are also considered, regardless of --enable-layerset-slicing. Picking 
+		// the first material (in accordance with other viewers) when layerset-slicing is disabled.
 		if (!single_material && associated_material->as<IfcSchema::IfcMaterialLayerSetUsage>()) {
 			IfcSchema::IfcMaterialLayerSet* layerset = associated_material->as<IfcSchema::IfcMaterialLayerSetUsage>()->ForLayerSet();
-			if (layerset->MaterialLayers()->size() == 1) {
+			if (getValue(GV_LAYERSET_FIRST) > 0.0 ? layerset->MaterialLayers()->size() >= 1 : layerset->MaterialLayers()->size() == 1) {
 				IfcSchema::IfcMaterialLayer* layer = (*layerset->MaterialLayers()->begin());
 				if (layer->hasMaterial()) {
 					single_material = layer->Material();

src/ifcgeom/IfcGeomIteratorImplementation.h

@@ -971,6 +971,12 @@ namespace IfcGeom {
             kernel.setValue(IfcGeom::Kernel::GV_MAX_FACES_TO_ORIENT, settings.get(IteratorSettings::SEW_SHELLS) ? std::numeric_limits<double>::infinity() : -1);
             kernel.setValue(IfcGeom::Kernel::GV_DIMENSIONALITY, (settings.get(IteratorSettings::INCLUDE_CURVES)
                 ? (settings.get(IteratorSettings::EXCLUDE_SOLIDS_AND_SURFACES) ? -1. : 0.) : +1.));
+			kernel.setValue(IfcGeom::Kernel::GV_LAYERSET_FIRST,
+				settings.get(IteratorSettings::LAYERSET_FIRST)
+				? +1.0
+				: -1.0
+			);
+
 			if (settings.get(IteratorSettings::BUILDING_LOCAL_PLACEMENT)) {
 				if (settings.get(IteratorSettings::SITE_LOCAL_PLACEMENT)) {
 					Logger::Message(Logger::LOG_WARNING, "building-local-placement takes precedence over site-local-placement");

src/ifcgeom/IfcGeomIteratorSettings.h

@@ -86,8 +86,10 @@ namespace IfcGeom
 			BUILDING_LOCAL_PLACEMENT = 1 << 16,
 			///
 			VALIDATE_QUANTITIES = 1 << 17,
+			/// Assigns the first layer material to the entire product
+			LAYERSET_FIRST = 1 << 18,
 			/// Number of different setting flags.
-			NUM_SETTINGS = 17
+			NUM_SETTINGS = 18
         };
         /// Used to store logical OR combination of setting flags.
         typedef unsigned SettingField;