src/linetypes/triangle.cpp

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013 - 2017 Teemu Piippo
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "triangle.h"

LDTriangle::LDTriangle(Model *model) :
	LDObject {model} {}

LDTriangle::LDTriangle(const Vertex& v1, const Vertex& v2, const Vertex& v3, Model* model) :
	LDObject {model}
{
	setVertex(0, v1);
	setVertex(1, v2);
	setVertex(2, v3);
}

int LDTriangle::triangleCount() const
{
	return 1;
}

QString LDTriangle::asText() const
{
	QString result = format("3 %1", color());

	for (int i = 0; i < 3; ++i)
		result += format(" %1", vertex (i));

	return result;
}

void LDTriangle::invert()
{
	// Triangle goes 0 -> 1 -> 2, reversed: 0 -> 2 -> 1.
	// Thus, we swap 1 and 2.
	Vertex temp = vertex(1);
	setVertex(1, vertex(2));
	setVertex(2, temp);
}