Pleco

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 ** This file is part of the examples of the Qt Toolkit.

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#include <QtGui>

#include <QtOpenGL>

#include <math.h>

#include "GLWidget.h"

#include "qtlogo.h"

#ifndef GL_MULTISAMPLE

#define GL_MULTISAMPLE  0x809D

#endif

GLWidget::GLWidget(QWidget *parent)

  : QGLWidget(QGLFormat(QGL::SampleBuffers), parent)

{

  logo = 0;

  yawRot = 0;

  pitchRot = 0;

  rollRot = 0;

  qtGreen = QColor::fromCmykF(0.40, 0.0, 1.0, 0.0);

  qtPurple = QColor::fromCmykF(0.39, 0.39, 0.0, 0.0);

}

GLWidget::~GLWidget()

{

}

QSize GLWidget::minimumSizeHint() const

{

  return QSize(50, 50);

}

QSize GLWidget::sizeHint() const

{

  return QSize(400, 400);

}

static void qNormalizeAngle(int &angle)

{

  while (angle < -180)

        angle = 180;

  while (angle > 180)

        angle = 180;

}

void GLWidget::setYawRotation(int angle)

{

  qNormalizeAngle(angle);

  if (angle != yawRot) {

        yawRot = angle;

        emit yawRotationChanged(angle);

        updateGL();

  }

}

void GLWidget::setPitchRotation(int angle)

{

  qNormalizeAngle(angle);

  if (angle != pitchRot) {

        pitchRot = angle;

        emit pitchRotationChanged(angle);

        updateGL();

  }

}

void GLWidget::setRollRotation(int angle)

{

  qNormalizeAngle(angle);

  if (angle != rollRot) {

        rollRot = angle;

        emit rollRotationChanged(angle);

        updateGL();

  }

}

void GLWidget::initializeGL()

{

  qglClearColor(qtPurple.dark());

  logo = new QtLogo(this, 64);

  logo->setColor(qtGreen.dark());

  glEnable(GL_DEPTH_TEST);

  glEnable(GL_CULL_FACE);

  glShadeModel(GL_SMOOTH);

  glEnable(GL_LIGHTING);

  glEnable(GL_LIGHT0);

  glEnable(GL_MULTISAMPLE);

  static GLfloat lightPosition[4] = { 0.5, 5.0, 7.0, 1.0 };

  glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);

}

void GLWidget::paintGL()

{

  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  glLoadIdentity();

  glTranslatef(0.0, 0.0, -10.0);

  qDebug() << "FOO:" << yawRot << pitchRot << rollRot;

  glRotatef(-rollRot , 0.0, 0.0, 1.0);

  glRotatef( pitchRot, 1.0, 0.0, 0.0);

  glRotatef(-yawRot,   0.0, 1.0, 0.0);  

  logo->draw();

}

void GLWidget::resizeGL(int width, int height)

{

  int side = qMin(width, height);

  glViewport((width - side) / 2, (height - side) / 2, side, side);

  glMatrixMode(GL_PROJECTION);

  glLoadIdentity();

#ifdef QT_OPENGL_ES_1

  glOrthof(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0);

#else

  glOrtho(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0);

#endif

  glMatrixMode(GL_MODELVIEW);

}