Implement ObjectPlacement using native recursion

2026-08-14 11:24:19 +00:00 · 2023-10-24 20:54:25 +02:00
parent 2a53911c52
commit ad61353fb5
4 changed files with 74 additions and 174 deletions
@@ -0,0 +1,73 @@
+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#include "mapping.h"
+#define mapping POSTFIX_SCHEMA(mapping)
+using namespace ifcopenshell::geometry;
+
+taxonomy::ptr mapping::map_impl(const IfcSchema::IfcObjectPlacement* inst) {
+	const IfcSchema::IfcObjectPlacement* relative_to = nullptr;
+	const IfcUtil::IfcBaseInterface* transform;
+
+#ifdef SCHEMA_HAS_IfcLinearPlacement
+	if (inst->as<IfcSchema::IfcLinearPlacement>()) {
+		transform = inst->as<IfcSchema::IfcLinearPlacement>()->RelativePlacement();
+	}
+#endif
+	if (inst->as<IfcSchema::IfcLocalPlacement>()) {
+		transform = inst->as<IfcSchema::IfcLocalPlacement>()->RelativePlacement();
+	}
+	if (inst->as<IfcSchema::IfcGridPlacement>()) {
+		// @todo a bit harder to map without kernel
+		return nullptr;
+	}
+
+#ifdef SCHEMA_IfcObjectPlacement_HAS_PlacementRelTo
+	relative_to = inst->PlacementRelTo();
+#else
+	if (inst->as<IfcSchema::IfcLocalPlacement>()) {
+		relative_to = inst->as<IfcSchema::IfcLocalPlacement>()->PlacementRelTo();
+	}
+#endif
+
+	bool parent_placement_ignored = false;
+	if (relative_to && (placement_rel_to_type_ || placement_rel_to_instance_)) {
+		IfcSchema::IfcProduct::list::ptr parent_places = relative_to->PlacesObject();
+		for (auto iter = parent_places->begin(); iter != parent_places->end(); ++iter) {
+			if ((placement_rel_to_type_ && (*iter)->declaration().is(*placement_rel_to_type_)) ||
+				(placement_rel_to_instance_ && (*iter)->as<IfcUtil::IfcBaseEntity>() == placement_rel_to_instance_)) {
+				parent_placement_ignored = true;
+			}
+		}
+	}
+
+	if (!parent_placement_ignored && relative_to) {
+		// The parent placement of the current is a placement for a type that is
+		// being ignored (Site or Building) or it is the host element of an opening.
+		return taxonomy::make<taxonomy::matrix4>(
+			taxonomy::cast<taxonomy::matrix4>(map(relative_to))->ccomponents() *
+			taxonomy::cast<taxonomy::matrix4>(map(transform))->ccomponents()
+		);
+	} else {
+		return map(transform);
+	}
+
+	// @todo
+	// m4->components() = offset_and_rotation_ * m4->components();
+}