284 lines
8.3 KiB
C++
284 lines
8.3 KiB
C++
|
/****************************************************************************
|
||
|
|
**
|
||
|
|
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
|
||
|
|
** All rights reserved.
|
||
|
|
** Contact: Nokia Corporation (qt-info@nokia.com)
|
||
|
|
**
|
||
|
|
** This file is part of the examples of the Qt Toolkit.
|
||
|
|
**
|
||
|
|
** $QT_BEGIN_LICENSE:BSD$
|
||
|
|
** You may use this file under the terms of the BSD license as follows:
|
||
|
|
**
|
||
|
|
** "Redistribution and use in source and binary forms, with or without
|
||
|
|
** modification, are permitted provided that the following conditions are
|
||
|
|
** met:
|
||
|
|
** * Redistributions of source code must retain the above copyright
|
||
|
|
** notice, this list of conditions and the following disclaimer.
|
||
|
|
** * Redistributions in binary form must reproduce the above copyright
|
||
|
|
** notice, this list of conditions and the following disclaimer in
|
||
|
|
** the documentation and/or other materials provided with the
|
||
|
|
** distribution.
|
||
|
|
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
|
||
|
|
** the names of its contributors may be used to endorse or promote
|
||
|
|
** products derived from this software without specific prior written
|
||
|
|
** permission.
|
||
|
|
**
|
||
|
|
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
|
||
|
|
** $QT_END_LICENSE$
|
||
|
|
**
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#include <QtGui>
|
||
|
|
#include <QtOpenGL>
|
||
|
|
|
||
|
|
#include <math.h>
|
||
|
|
|
||
|
|
#include "glwidget.h"
|
||
|
|
|
||
|
|
GLWidget::GLWidget(QWidget *parent)
|
||
|
|
: QGLWidget(parent)
|
||
|
|
{
|
||
|
|
gear1 = 0;
|
||
|
|
gear2 = 0;
|
||
|
|
gear3 = 0;
|
||
|
|
xRot = 0;
|
||
|
|
yRot = 0;
|
||
|
|
zRot = 0;
|
||
|
|
gear1Rot = 0;
|
||
|
|
|
||
|
|
QTimer *timer = new QTimer(this);
|
||
|
|
connect(timer, SIGNAL(timeout()), this, SLOT(advanceGears()));
|
||
|
|
timer->start(20);
|
||
|
|
}
|
||
|
|
|
||
|
|
GLWidget::~GLWidget()
|
||
|
|
{
|
||
|
|
makeCurrent();
|
||
|
|
glDeleteLists(gear1, 1);
|
||
|
|
glDeleteLists(gear2, 1);
|
||
|
|
glDeleteLists(gear3, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::setXRotation(int angle)
|
||
|
|
{
|
||
|
|
normalizeAngle(&angle);
|
||
|
|
if (angle != xRot) {
|
||
|
|
xRot = angle;
|
||
|
|
emit xRotationChanged(angle);
|
||
|
|
updateGL();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::setYRotation(int angle)
|
||
|
|
{
|
||
|
|
normalizeAngle(&angle);
|
||
|
|
if (angle != yRot) {
|
||
|
|
yRot = angle;
|
||
|
|
emit yRotationChanged(angle);
|
||
|
|
updateGL();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::setZRotation(int angle)
|
||
|
|
{
|
||
|
|
normalizeAngle(&angle);
|
||
|
|
if (angle != zRot) {
|
||
|
|
zRot = angle;
|
||
|
|
emit zRotationChanged(angle);
|
||
|
|
updateGL();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::initializeGL()
|
||
|
|
{
|
||
|
|
static const GLfloat lightPos[4] = { 5.0f, 5.0f, 10.0f, 1.0f };
|
||
|
|
static const GLfloat reflectance1[4] = { 0.8f, 0.1f, 0.0f, 1.0f };
|
||
|
|
static const GLfloat reflectance2[4] = { 0.0f, 0.8f, 0.2f, 1.0f };
|
||
|
|
static const GLfloat reflectance3[4] = { 0.2f, 0.2f, 1.0f, 1.0f };
|
||
|
|
|
||
|
|
glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
|
||
|
|
glEnable(GL_LIGHTING);
|
||
|
|
glEnable(GL_LIGHT0);
|
||
|
|
glEnable(GL_DEPTH_TEST);
|
||
|
|
|
||
|
|
gear1 = makeGear(reflectance1, 1.0, 4.0, 1.0, 0.7, 20);
|
||
|
|
gear2 = makeGear(reflectance2, 0.5, 2.0, 2.0, 0.7, 10);
|
||
|
|
gear3 = makeGear(reflectance3, 1.3, 2.0, 0.5, 0.7, 10);
|
||
|
|
|
||
|
|
glEnable(GL_NORMALIZE);
|
||
|
|
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::paintGL()
|
||
|
|
{
|
||
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
||
|
|
|
||
|
|
glPushMatrix();
|
||
|
|
glRotated(xRot / 16.0, 1.0, 0.0, 0.0);
|
||
|
|
glRotated(yRot / 16.0, 0.0, 1.0, 0.0);
|
||
|
|
glRotated(zRot / 16.0, 0.0, 0.0, 1.0);
|
||
|
|
|
||
|
|
drawGear(gear1, -3.0, -2.0, 0.0, gear1Rot / 16.0);
|
||
|
|
drawGear(gear2, +3.1, -2.0, 0.0, -2.0 * (gear1Rot / 16.0) - 9.0);
|
||
|
|
|
||
|
|
glRotated(+90.0, 1.0, 0.0, 0.0);
|
||
|
|
drawGear(gear3, -3.1, -1.8, -2.2, +2.0 * (gear1Rot / 16.0) - 2.0);
|
||
|
|
|
||
|
|
glPopMatrix();
|
||
|
|
}
|
||
|
|
|
||
|
|
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();
|
||
|
|
glFrustum(-1.0, +1.0, -1.0, 1.0, 5.0, 60.0);
|
||
|
|
glMatrixMode(GL_MODELVIEW);
|
||
|
|
glLoadIdentity();
|
||
|
|
glTranslated(0.0, 0.0, -40.0);
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::mousePressEvent(QMouseEvent *event)
|
||
|
|
{
|
||
|
|
lastPos = event->pos();
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::mouseMoveEvent(QMouseEvent *event)
|
||
|
|
{
|
||
|
|
int dx = event->x() - lastPos.x();
|
||
|
|
int dy = event->y() - lastPos.y();
|
||
|
|
|
||
|
|
if (event->buttons() & Qt::LeftButton) {
|
||
|
|
setXRotation(xRot + 8 * dy);
|
||
|
|
setYRotation(yRot + 8 * dx);
|
||
|
|
} else if (event->buttons() & Qt::RightButton) {
|
||
|
|
setXRotation(xRot + 8 * dy);
|
||
|
|
setZRotation(zRot + 8 * dx);
|
||
|
|
}
|
||
|
|
lastPos = event->pos();
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::advanceGears()
|
||
|
|
{
|
||
|
|
gear1Rot += 2 * 16;
|
||
|
|
updateGL();
|
||
|
|
}
|
||
|
|
|
||
|
|
GLuint GLWidget::makeGear(const GLfloat *reflectance, GLdouble innerRadius,
|
||
|
|
GLdouble outerRadius, GLdouble thickness,
|
||
|
|
GLdouble toothSize, GLint toothCount)
|
||
|
|
{
|
||
|
|
const double Pi = 3.14159265358979323846;
|
||
|
|
|
||
|
|
GLuint list = glGenLists(1);
|
||
|
|
glNewList(list, GL_COMPILE);
|
||
|
|
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, reflectance);
|
||
|
|
|
||
|
|
GLdouble r0 = innerRadius;
|
||
|
|
GLdouble r1 = outerRadius - toothSize / 2.0;
|
||
|
|
GLdouble r2 = outerRadius + toothSize / 2.0;
|
||
|
|
GLdouble delta = (2.0 * Pi / toothCount) / 4.0;
|
||
|
|
GLdouble z = thickness / 2.0;
|
||
|
|
int i, j;
|
||
|
|
|
||
|
|
glShadeModel(GL_FLAT);
|
||
|
|
|
||
|
|
for (i = 0; i < 2; ++i) {
|
||
|
|
GLdouble sign = (i == 0) ? +1.0 : -1.0;
|
||
|
|
|
||
|
|
glNormal3d(0.0, 0.0, sign);
|
||
|
|
|
||
|
|
glBegin(GL_QUAD_STRIP);
|
||
|
|
for (j = 0; j <= toothCount; ++j) {
|
||
|
|
GLdouble angle = 2.0 * Pi * j / toothCount;
|
||
|
|
glVertex3d(r0 * cos(angle), r0 * sin(angle), sign * z);
|
||
|
|
glVertex3d(r1 * cos(angle), r1 * sin(angle), sign * z);
|
||
|
|
glVertex3d(r0 * cos(angle), r0 * sin(angle), sign * z);
|
||
|
|
glVertex3d(r1 * cos(angle + 3 * delta), r1 * sin(angle + 3 * delta),
|
||
|
|
sign * z);
|
||
|
|
}
|
||
|
|
glEnd();
|
||
|
|
|
||
|
|
glBegin(GL_QUADS);
|
||
|
|
for (j = 0; j < toothCount; ++j) {
|
||
|
|
GLdouble angle = 2.0 * Pi * j / toothCount;
|
||
|
|
glVertex3d(r1 * cos(angle), r1 * sin(angle), sign * z);
|
||
|
|
glVertex3d(r2 * cos(angle + delta), r2 * sin(angle + delta),
|
||
|
|
sign * z);
|
||
|
|
glVertex3d(r2 * cos(angle + 2 * delta), r2 * sin(angle + 2 * delta),
|
||
|
|
sign * z);
|
||
|
|
glVertex3d(r1 * cos(angle + 3 * delta), r1 * sin(angle + 3 * delta),
|
||
|
|
sign * z);
|
||
|
|
}
|
||
|
|
glEnd();
|
||
|
|
}
|
||
|
|
|
||
|
|
glBegin(GL_QUAD_STRIP);
|
||
|
|
for (i = 0; i < toothCount; ++i) {
|
||
|
|
for (j = 0; j < 2; ++j) {
|
||
|
|
GLdouble angle = 2.0 * Pi * (i + (j / 2.0)) / toothCount;
|
||
|
|
GLdouble s1 = r1;
|
||
|
|
GLdouble s2 = r2;
|
||
|
|
if (j == 1)
|
||
|
|
qSwap(s1, s2);
|
||
|
|
|
||
|
|
glNormal3d(cos(angle), sin(angle), 0.0);
|
||
|
|
glVertex3d(s1 * cos(angle), s1 * sin(angle), +z);
|
||
|
|
glVertex3d(s1 * cos(angle), s1 * sin(angle), -z);
|
||
|
|
|
||
|
|
glNormal3d(s2 * sin(angle + delta) - s1 * sin(angle),
|
||
|
|
s1 * cos(angle) - s2 * cos(angle + delta), 0.0);
|
||
|
|
glVertex3d(s2 * cos(angle + delta), s2 * sin(angle + delta), +z);
|
||
|
|
glVertex3d(s2 * cos(angle + delta), s2 * sin(angle + delta), -z);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
glVertex3d(r1, 0.0, +z);
|
||
|
|
glVertex3d(r1, 0.0, -z);
|
||
|
|
glEnd();
|
||
|
|
|
||
|
|
glShadeModel(GL_SMOOTH);
|
||
|
|
|
||
|
|
glBegin(GL_QUAD_STRIP);
|
||
|
|
for (i = 0; i <= toothCount; ++i) {
|
||
|
|
GLdouble angle = i * 2.0 * Pi / toothCount;
|
||
|
|
glNormal3d(-cos(angle), -sin(angle), 0.0);
|
||
|
|
glVertex3d(r0 * cos(angle), r0 * sin(angle), +z);
|
||
|
|
glVertex3d(r0 * cos(angle), r0 * sin(angle), -z);
|
||
|
|
}
|
||
|
|
glEnd();
|
||
|
|
|
||
|
|
glEndList();
|
||
|
|
|
||
|
|
return list;
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::drawGear(GLuint gear, GLdouble dx, GLdouble dy, GLdouble dz,
|
||
|
|
GLdouble angle)
|
||
|
|
{
|
||
|
|
glPushMatrix();
|
||
|
|
glTranslated(dx, dy, dz);
|
||
|
|
glRotated(angle, 0.0, 0.0, 1.0);
|
||
|
|
glCallList(gear);
|
||
|
|
glPopMatrix();
|
||
|
|
}
|
||
|
|
|
||
|
|
void GLWidget::normalizeAngle(int *angle)
|
||
|
|
{
|
||
|
|
while (*angle < 0)
|
||
|
|
*angle += 360 * 16;
|
||
|
|
while (*angle > 360 * 16)
|
||
|
|
*angle -= 360 * 16;
|
||
|
|
}
|