Manually merged in aothms revisions for gradient curves and implicit_item taxonomy

2026-08-14 19:34:34 +00:00 · 2023-10-02 16:30:39 -07:00
parent ae09a1acac
commit 7b0e2c52ac
10 changed files with 1565 additions and 1336 deletions
@@ -0,0 +1,76 @@
+/********************************************************************************
+ *                                                                              *
+ * 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;
+
+#ifdef SCHEMA_HAS_IfcGradientCurve
+
+taxonomy::ptr mapping::map_impl(const IfcSchema::IfcGradientCurve* inst) {
+	auto horizontal = taxonomy::cast<taxonomy::piecewise_function>(map(inst->BaseCurve()));
+	auto vertical = taxonomy::make<taxonomy::piecewise_function>();
+
+	auto segments = inst->Segments();
+
+	for (auto& segment : *segments) {
+		if (segment->as<IfcSchema::IfcCurveSegment>()) {
+			// @todo check that we don't get a mixture of implicit and explicit definitions
+			auto crv = map(segment->as<IfcSchema::IfcCurveSegment>());
+			if (crv->kind() == taxonomy::PIECEWISE_FUNCTION) {
+				auto seg = taxonomy::cast<taxonomy::piecewise_function>(crv);
+				vertical->spans.insert(vertical->spans.end(), seg->spans.begin(), seg->spans.end());
+			} else {
+				Logger::Error("Unsupported");
+				return nullptr;
+			}
+		} else {
+			Logger::Error("Unsupported");
+			return nullptr;
+		}
+	}
+
+	// @todo does this really make sense?
+	auto composition = [horizontal, vertical](double u) {
+		auto xy = horizontal->evaluate(u);
+		auto z = vertical->evaluate(u);
+		Eigen::VectorXd vec(3);
+		vec << xy(0), xy(1), z(0);
+		return vec;
+	};
+
+	// @todo where do we get the startdistalong from @civilx64's code?
+	std::array<taxonomy::piecewise_function::ptr, 2> both = { horizontal , vertical };
+	double min_length = std::numeric_limits<double>::infinity();
+	for (auto i = 0; i < 2; ++i) {
+		double l = 0;
+		for (auto& s : both[i]->spans) {
+			l += s.first;
+		}
+		if (l < min_length) {
+			min_length = l;
+		}
+	}
+
+	auto pwf = taxonomy::make<taxonomy::piecewise_function>();
+	pwf->spans.push_back({ min_length, composition });
+	return pwf;
+}
+
+#endif