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Util.cpp
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Util.cpp
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/*
* Util.cpp
*
* (c) 2013 Sofian Audry -- info(@)sofianaudry(.)com
* (c) 2013 Alexandre Quessy -- alexandre(@)quessy(.)net
*
* 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 "Util.h"
#include <glib.h>
#include <algorithm>
#include <QFile>
#include <QDir>
#include <iostream>
#include <QRegExp>
namespace mmp {
namespace Util {
void correctGlTexCoord(GLfloat x, GLfloat y)
{
glTexCoord2f (x, y);
}
void setGlTexPoint(const Texture& texture, const QPointF& inputPoint, const QPointF& outputPoint)
{
// Set point in texture.
correctGlTexCoord(
(inputPoint.x() - texture.getX()) / (GLfloat) texture.getWidth(),
(inputPoint.y() - texture.getY()) / (GLfloat) texture.getHeight());
// Add point in output.
glVertex2f(
outputPoint.x(),
outputPoint.y()
);
}
/**
* Convenience function to map a variable from one coordinate space
* to another.
* The result is clipped in the range [ostart, ostop]
* Make sure ostop is bigger than ostart.
*
* To map a MIDI control value into the [0,1] range:
* map(value, 0.0, 1.0, 0. 127.);
*
* Depends on: #include <algorithm>
*/
float map_float(float value, float istart, float istop, float ostart, float ostop)
{
float ret = ostart + (ostop - ostart) * ((value - istart) / (istop - istart));
// In Processing, they don't do the following: (clipping)
return std::max(std::min(ret, ostop), ostart);
}
/**
* See map_float
*/
int map_int(int value, int istart, int istop, int ostart, int ostop)
{
float ret = ostart + (ostop - ostart) * ((value - istart) / float(istop - istart));
//g_print("%f = %d + (%d-%d) * ((%d-%d) / (%d-%d))", ret, ostart, ostop, ostart, value, istart, istop, istart);
// In Processing, they don't do the following: (clipping)
return std::max(std::min(int(ret), ostop), ostart);
}
Mesh* createMeshForTexture(Texture* texture, int frameWidth, int frameHeight)
{
Q_UNUSED(frameHeight);
Q_UNUSED(frameWidth);
return new Mesh(
QPointF(texture->getX(), texture->getY()),
QPointF(texture->getX() + texture->getWidth(), texture->getY()),
QPointF(texture->getX() + texture->getWidth(), texture->getY() + texture->getHeight()),
QPointF(texture->getX(), texture->getY() + texture->getHeight())
);
}
Triangle* createTriangleForTexture(Texture* texture, int frameWidth, int frameHeight)
{
Q_UNUSED(frameHeight);
Q_UNUSED(frameWidth);
return new Triangle(
QPointF(texture->getX(), texture->getY() + texture->getHeight()),
QPointF(texture->getX() + texture->getWidth(), texture->getY() + texture->getHeight()),
QPointF(texture->getX() + texture->getWidth() / 2, texture->getY())
);
}
Ellipse* createEllipseForTexture(Texture* texture, int frameWidth,
int frameHeight)
{
Q_UNUSED(frameHeight);
Q_UNUSED(frameWidth);
qreal halfWidth = texture->getWidth() / 2;
qreal halfHeight = texture->getHeight() / 2;
return new Ellipse(
QPointF(texture->getX(), texture->getY() + halfHeight),
QPointF(texture->getX() + halfWidth, texture->getY()),
QPointF(texture->getX() + texture->getWidth(), texture->getY() + halfHeight),
QPointF(texture->getX() + halfWidth, texture->getY() + texture->getHeight()),
true
);
}
Mesh* createMeshForColor(int frameWidth, int frameHeight)
{
return new Mesh(
QPointF(frameWidth / 4, frameHeight / 4),
QPointF(frameWidth * 3 / 4, frameHeight / 4),
QPointF(frameWidth * 3 / 4, frameHeight * 3/ 4),
QPointF(frameWidth / 4, frameHeight * 3 / 4)
);
}
Triangle* createTriangleForColor(int frameWidth, int frameHeight)
{
return new Triangle(
QPointF(frameWidth / 4, frameHeight * 3 / 4),
QPointF(frameWidth * 3 / 4, frameHeight * 3 / 4),
QPointF(frameWidth / 2, frameHeight / 4)
);
}
Ellipse* createEllipseForColor(int frameWidth, int frameHeight)
{
return new Ellipse(
QPointF(frameWidth / 4, frameHeight / 2),
QPointF(frameWidth / 2, frameHeight / 4),
QPointF(frameWidth * 3 / 4, frameHeight / 2),
QPointF(frameWidth / 2, frameHeight * 3 / 4),
false
);
}
void drawControlsVertex(QPainter* painter, const QPointF& vertex, bool selected, bool locked, qreal radius, qreal strokeWidth)
{
// Init colors and stroke.
if (locked)
painter->setBrush(MM::VERTEX_LOCKED_BACKGROUND);
else
painter->setBrush(selected ? MM::VERTEX_SELECTED_BACKGROUND : MM::VERTEX_BACKGROUND);
painter->setPen(locked ? QPen(MM::CONTROL_LOCKED_COLOR) : QPen(MM::CONTROL_COLOR, strokeWidth));
// Draw ellipse.
painter->drawEllipse(vertex, radius, radius);
// Draw cross.
qreal offset = sin(M_PI/4) * radius;
painter->drawLine( vertex + QPointF(offset, offset), vertex + QPointF(-offset, -offset) );
painter->drawLine( vertex + QPointF(offset, -offset), vertex + QPointF(-offset, offset) );
}
bool fileExists(const QString& filename)
{
return QFile::exists(filename);
// gchar* filetestpath = (gchar*) filename.toUtf8().constData();
// if (FALSE == g_file_test(filetestpath, G_FILE_TEST_EXISTS))
// {
// //std::cout << "File " << filetestpath << " does not exist" << std::endl;
// return false;
// }
// return true;
}
bool eraseFile(const QString& filename)
{
if (! fileExists(filename))
{
return false;
}
QFile file(filename);
file.close();
return file.remove();
}
bool eraseSettings()
{
QString homePath = QDir::homePath();
QString settingsFilePath = QDir(homePath).filePath(".config/MapMap/MapMap.conf");
QFile settingsFile(settingsFilePath);
if (! settingsFile.exists())
{
return false;
}
else
{
qDebug() << "Erase MapMap settings.";
settingsFile.close();
return settingsFile.remove();
}
}
bool isNumeric(const QString& text)
{
QRegExp re("\\d*"); // a digit (\d), zero or more times (*)
return (re.exactMatch(text));
}
} // end of namespace
}