src/ldrawalgorithm.cpp

#include "src/ldrawalgorithm.h"

std::pair<Triangle, Triangle> splitTriangles(
	const Quadrilateral& q,
	ldraw::Diagonal diagonal)
{
	std::pair<Triangle, Triangle> result;
	switch (diagonal)
	{
	case ldraw::Diagonal::Diagonal_13:
		result = {Triangle{q.p1, q.p2, q.p3}, {q.p1, q.p3, q.p4}};
		break;
	case ldraw::Diagonal::Diagonal_24:
		result = {Triangle{q.p1, q.p2, q.p3}, {q.p2, q.p3, q.p4}};
		break;
	}
	return result;
}

std::vector<ModelAction> ldraw::makeUnofficial(const Model* model)
{
	std::vector<ModelAction> actions;
	if (model->size() >= 4) {
		if (const Comment* comment = std::get_if<Comment>(&(*model)[3])) {
			const QString& body = comment->text;
			if (body.startsWith("!LDRAW_ORG ") and not body.startsWith("!LDRAW_ORG Unofficial_"))
			{
				// Add Unofficial_ to part type
				QStringList tokens = body.split(" ");
				tokens[1] = "Unofficial_" + tokens[1];
				// Remove the UPDATE tag if it's there
				if (tokens.size() >= 4 && tokens[2] == "UPDATE")
				{
					tokens.removeAt(3);
					tokens.removeAt(2);
				}
				actions.push_back(ModifyModel{
					.position = 3,
					.newElement = Comment{.text = tokens.join(" ")}
				});
			}
		}
	}
	return actions;
}

ModelElement inverted(const ModelElement& element)
{
	return std::visit(overloaded{
		[](Colored<SubfileReference> ref) -> ModelElement {
			ref.inverted = not ref.inverted;
			return ref;
		},
		[](Colored<CircularPrimitive> circ) -> ModelElement {
			circ.inverted = not circ.inverted;
			return circ;
		},
		[](Colored<Triangle> triangle) -> ModelElement {
			std::swap(triangle.p1, triangle.p2);
			return triangle;
		},
		[](Colored<Quadrilateral> quad) -> ModelElement {
			std::swap(quad.p2, quad.p4);
			return quad;
		},
		[](const ModelElement& x) { return x; }
	}, element);
}