src/editmodes/rectangleMode.cpp

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013 - 2018 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 <QPainter>
#include <QMouseEvent>
#include "rectangleMode.h"
#include "../ldObject.h"
#include "../glRenderer.h"

RectangleMode::RectangleMode(GLRenderer* renderer) :
	Super(renderer),
	m_rectangleVerts(QVector<Vertex>(4)) {}

EditModeType RectangleMode::type() const
{
	return EditModeType::Rectangle;
}

void RectangleMode::render(QPainter& painter) const
{
	renderPolygon(painter,(m_drawedVerts.size() > 0) ? m_rectangleVerts :
		QVector<Vertex>({renderer()->position3D()}), true, false);
}

void RectangleMode::endDraw()
{
	if (m_drawedVerts.size() == 2)
	{
		LDQuad* quad = LDSpawn<LDQuad>();
		updateRectVerts();

		for (int i = 0; i < quad->numVertices(); ++i)
			quad->setVertex(i, m_rectangleVerts[i]);

		quad->setColor(MainColor);
		finishDraw(LDObjectList({quad}));
	}
}

//
// Update rect vertices when the mouse moves since the 3d position likely has changed
//
bool RectangleMode::mouseMoved(QMouseEvent*)
{
	updateRectVerts();
	return false;
}

void RectangleMode::updateRectVerts()
{
	if (m_drawedVerts.isEmpty())
	{
		for (int i = 0; i < 4; ++i)
			m_rectangleVerts[i] = renderer()->position3D();

		return;
	}

	Vertex v0 = m_drawedVerts[0],
		   v1 = (m_drawedVerts.size() >= 2) ? m_drawedVerts[1] : renderer()->position3D();

	const Axis localx = renderer()->getCameraAxis(false),
			   localy = renderer()->getCameraAxis(true),
			   localz = (Axis)(3 - localx - localy);

	for (int i = 0; i < 4; ++i)
		m_rectangleVerts[i].setCoordinate(localz, renderer()->getDepthValue());

	m_rectangleVerts[0].setCoordinate(localx, v0[localx]);
	m_rectangleVerts[0].setCoordinate(localy, v0[localy]);
	m_rectangleVerts[1].setCoordinate(localx, v1[localx]);
	m_rectangleVerts[1].setCoordinate(localy, v0[localy]);
	m_rectangleVerts[2].setCoordinate(localx, v1[localx]);
	m_rectangleVerts[2].setCoordinate(localy, v1[localy]);
	m_rectangleVerts[3].setCoordinate(localx, v0[localx]);
	m_rectangleVerts[3].setCoordinate(localy, v1[localy]);
}