src/vertexmap.cpp

#include "vertexmap.h"
#include "linetypes/polygonobject.h"

VertexMap::VertexMap(const Model *model) :
	model{model}
{
	connect(
		model,
		&Model::dataChanged,
		this,
		&VertexMap::build
	);
	connect(
		model,
		&Model::rowsInserted,
		this,
		&VertexMap::build
	);
	connect(
		model,
		&Model::rowsRemoved,
		this,
		&VertexMap::build
	);
	this->build();
}

void VertexMap::build()
{
	this->map.clear();
	this->vertices.clear();
	this->vertexHashes.clear();
	this->model->apply<ldraw::Object>([&](const ldraw::Object* object)
	{
		for (int i = 0; i < object->numPoints(); i += 1)
		{
			const glm::vec3& point = object->getPoint(i);
			const unsigned int hash = qHash(point);
			this->map[hash].insert(object->id);
			if (not this->vertexHashes.contains(hash))
			{
				this->vertexHashes.insert(hash);
				this->vertices.push_back(point);
			}
		}
	});
	Q_EMIT this->verticesChanged();
}

/**
 * @brief Apply \c fn for all vertices in the map.
 * @param fn
 */
void VertexMap::apply(ApplyFunction fn) const
{
	for (unsigned int i = 0; i < this->vertices.size(); i += 1)
	{
		const glm::vec3& point = this->vertices[i];
		fn(point, this->map.at(qHash(point)));
	}
}