#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
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## 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
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## $QT_END_LICENSE$
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#############################################################################
import sys
import math
from PyQt5.QtCore import pyqtSignal, QRegExp, QSize, Qt, QTimer
from PyQt5.QtGui import QPixmap
from PyQt5.QtWidgets import (QAction, QApplication, QGridLayout, QInputDialog,
QLabel, QLineEdit, QMainWindow, QMessageBox, QScrollArea, QSizePolicy,
QSlider, QWidget)
from PyQt5.QtOpenGL import QGLWidget
try:
from OpenGL.GL import *
except ImportError:
app = QApplication(sys.argv)
QMessageBox.critical(None, "OpenGL grabber",
"PyOpenGL must be installed to run this example.")
sys.exit(1)
class GLWidget(QGLWidget):
xRotationChanged = pyqtSignal(int)
yRotationChanged = pyqtSignal(int)
zRotationChanged = pyqtSignal(int)
def __init__(self, parent=None):
super(GLWidget, self).__init__(parent)
self.gear1 = 0
self.gear2 = 0
self.gear3 = 0
self.xRot = 0
self.yRot = 0
self.zRot = 0
self.gear1Rot = 0
timer = QTimer(self)
timer.timeout.connect(self.advanceGears)
timer.start(20)
def setXRotation(self, angle):
self.normalizeAngle(angle)
if angle != self.xRot:
self.xRot = angle
self.xRotationChanged.emit(angle)
self.updateGL()
def setYRotation(self, angle):
self.normalizeAngle(angle)
if angle != self.yRot:
self.yRot = angle
self.yRotationChanged.emit(angle)
self.updateGL()
def setZRotation(self, angle):
self.normalizeAngle(angle)
if angle != self.zRot:
self.zRot = angle
self.zRotationChanged.emit(angle)
self.updateGL()
def initializeGL(self):
lightPos = (5.0, 5.0, 10.0, 1.0)
reflectance1 = (0.8, 0.1, 0.0, 1.0)
reflectance2 = (0.0, 0.8, 0.2, 1.0)
reflectance3 = (0.2, 0.2, 1.0, 1.0)
glLightfv(GL_LIGHT0, GL_POSITION, lightPos)
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
glEnable(GL_DEPTH_TEST)
self.gear1 = self.makeGear(reflectance1, 1.0, 4.0, 1.0, 0.7, 20)
self.gear2 = self.makeGear(reflectance2, 0.5, 2.0, 2.0, 0.7, 10)
self.gear3 = self.makeGear(reflectance3, 1.3, 2.0, 0.5, 0.7, 10)
glEnable(GL_NORMALIZE)
glClearColor(0.0, 0.0, 0.0, 1.0)
def paintGL(self):
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glPushMatrix()
glRotated(self.xRot / 16.0, 1.0, 0.0, 0.0)
glRotated(self.yRot / 16.0, 0.0, 1.0, 0.0)
glRotated(self.zRot / 16.0, 0.0, 0.0, 1.0)
self.drawGear(self.gear1, -3.0, -2.0, 0.0, self.gear1Rot / 16.0)
self.drawGear(self.gear2, +3.1, -2.0, 0.0,
-2.0 * (self.gear1Rot / 16.0) - 9.0)
glRotated(+90.0, 1.0, 0.0, 0.0)
self.drawGear(self.gear3, -3.1, -1.8, -2.2,
+2.0 * (self.gear1Rot / 16.0) - 2.0)
glPopMatrix()
def resizeGL(self, width, height):
side = min(width, height)
if side < 0:
return
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)
def mousePressEvent(self, event):
self.lastPos = event.pos()
def mouseMoveEvent(self, event):
dx = event.x() - self.lastPos.x()
dy = event.y() - self.lastPos.y()
if event.buttons() & Qt.LeftButton:
self.setXRotation(self.xRot + 8 * dy)
self.setYRotation(self.yRot + 8 * dx)
elif event.buttons() & Qt.RightButton:
self.setXRotation(self.xRot + 8 * dy)
self.setZRotation(self.zRot + 8 * dx)
self.lastPos = event.pos()
def advanceGears(self):
self.gear1Rot += 2 * 16
self.updateGL()
def xRotation(self):
return self.xRot
def yRotation(self):
return self.yRot
def zRotation(self):
return self.zRot
def makeGear(self, reflectance, innerRadius, outerRadius, thickness, toothSize, toothCount):
list = glGenLists(1)
glNewList(list, GL_COMPILE)
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, reflectance)
r0 = innerRadius
r1 = outerRadius - toothSize / 2.0
r2 = outerRadius + toothSize / 2.0
delta = (2.0 * math.pi / toothCount) / 4.0
z = thickness / 2.0
glShadeModel(GL_FLAT)
for i in range(2):
if i == 0:
sign = +1.0
else:
sign = -1.0
glNormal3d(0.0, 0.0, sign)
glBegin(GL_QUAD_STRIP)
for j in range(toothCount+1):
angle = 2.0 * math.pi * j / toothCount
glVertex3d(r0 * math.cos(angle), r0 * math.sin(angle), sign * z)
glVertex3d(r1 * math.cos(angle), r1 * math.sin(angle), sign * z)
glVertex3d(r0 * math.cos(angle), r0 * math.sin(angle), sign * z)
glVertex3d(r1 * math.cos(angle + 3 * delta), r1 * math.sin(angle + 3 * delta), sign * z)
glEnd()
glBegin(GL_QUADS)
for j in range(toothCount):
angle = 2.0 * math.pi * j / toothCount
glVertex3d(r1 * math.cos(angle), r1 * math.sin(angle), sign * z)
glVertex3d(r2 * math.cos(angle + delta), r2 * math.sin(angle + delta), sign * z)
glVertex3d(r2 * math.cos(angle + 2 * delta), r2 * math.sin(angle + 2 * delta), sign * z)
glVertex3d(r1 * math.cos(angle + 3 * delta), r1 * math.sin(angle + 3 * delta), sign * z)
glEnd()
glBegin(GL_QUAD_STRIP)
for i in range(toothCount):
for j in range(2):
angle = 2.0 * math.pi * (i + (j / 2.0)) / toothCount
s1 = r1
s2 = r2
if j == 1:
s1, s2 = s2, s1
glNormal3d(math.cos(angle), math.sin(angle), 0.0)
glVertex3d(s1 * math.cos(angle), s1 * math.sin(angle), +z)
glVertex3d(s1 * math.cos(angle), s1 * math.sin(angle), -z)
glNormal3d(s2 * math.sin(angle + delta) - s1 * math.sin(angle), s1 * math.cos(angle) - s2 * math.cos(angle + delta), 0.0)
glVertex3d(s2 * math.cos(angle + delta), s2 * math.sin(angle + delta), +z)
glVertex3d(s2 * math.cos(angle + delta), s2 * math.sin(angle + delta), -z)
glVertex3d(r1, 0.0, +z)
glVertex3d(r1, 0.0, -z)
glEnd()
glShadeModel(GL_SMOOTH)
glBegin(GL_QUAD_STRIP)
for i in range(toothCount+1):
angle = i * 2.0 * math.pi / toothCount
glNormal3d(-math.cos(angle), -math.sin(angle), 0.0)
glVertex3d(r0 * math.cos(angle), r0 * math.sin(angle), +z)
glVertex3d(r0 * math.cos(angle), r0 * math.sin(angle), -z)
glEnd()
glEndList()
return list
def drawGear(self, gear, dx, dy, dz, angle):
glPushMatrix()
glTranslated(dx, dy, dz)
glRotated(angle, 0.0, 0.0, 1.0)
glCallList(gear)
glPopMatrix()
def normalizeAngle(self, angle):
while (angle < 0):
angle += 360 * 16
while (angle > 360 * 16):
angle -= 360 * 16
class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
centralWidget = QWidget()
self.setCentralWidget(centralWidget)
self.glWidget = GLWidget()
self.pixmapLabel = QLabel()
self.glWidgetArea = QScrollArea()
self.glWidgetArea.setWidget(self.glWidget)
self.glWidgetArea.setWidgetResizable(True)
self.glWidgetArea.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.glWidgetArea.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.glWidgetArea.setSizePolicy(QSizePolicy.Ignored,
QSizePolicy.Ignored)
self.glWidgetArea.setMinimumSize(50, 50)
self.pixmapLabelArea = QScrollArea()
self.pixmapLabelArea.setWidget(self.pixmapLabel)
self.pixmapLabelArea.setSizePolicy(QSizePolicy.Ignored,
QSizePolicy.Ignored)
self.pixmapLabelArea.setMinimumSize(50, 50)
xSlider = self.createSlider(self.glWidget.xRotationChanged,
self.glWidget.setXRotation)
ySlider = self.createSlider(self.glWidget.yRotationChanged,
self.glWidget.setYRotation)
zSlider = self.createSlider(self.glWidget.zRotationChanged,
self.glWidget.setZRotation)
self.createActions()
self.createMenus()
centralLayout = QGridLayout()
centralLayout.addWidget(self.glWidgetArea, 0, 0)
centralLayout.addWidget(self.pixmapLabelArea, 0, 1)
centralLayout.addWidget(xSlider, 1, 0, 1, 2)
centralLayout.addWidget(ySlider, 2, 0, 1, 2)
centralLayout.addWidget(zSlider, 3, 0, 1, 2)
centralWidget.setLayout(centralLayout)
xSlider.setValue(15 * 16)
ySlider.setValue(345 * 16)
zSlider.setValue(0 * 16)
self.setWindowTitle("Grabber")
self.resize(400, 300)
def renderIntoPixmap(self):
size = self.getSize()
if size.isValid():
pixmap = self.glWidget.renderPixmap(size.width(), size.height())
self.setPixmap(pixmap)
def grabFrameBuffer(self):
image = self.glWidget.grabFrameBuffer()
self.setPixmap(QPixmap.fromImage(image))
def clearPixmap(self):
self.setPixmap(QPixmap())
def about(self):
QMessageBox.about(self, "About Grabber",
"The <b>Grabber</b> example demonstrates two approaches for "
"rendering OpenGL into a Qt pixmap.")
def createActions(self):
self.renderIntoPixmapAct = QAction("&Render into Pixmap...",
self, shortcut="Ctrl+R", triggered=self.renderIntoPixmap)
self.grabFrameBufferAct = QAction("&Grab Frame Buffer", self,
shortcut="Ctrl+G", triggered=self.grabFrameBuffer)
self.clearPixmapAct = QAction("&Clear Pixmap", self,
shortcut="Ctrl+L", triggered=self.clearPixmap)
self.exitAct = QAction("E&xit", self, shortcut="Ctrl+Q",
triggered=self.close)
self.aboutAct = QAction("&About", self, triggered=self.about)
self.aboutQtAct = QAction("About &Qt", self,
triggered=QApplication.instance().aboutQt)
def createMenus(self):
self.fileMenu = self.menuBar().addMenu("&File")
self.fileMenu.addAction(self.renderIntoPixmapAct)
self.fileMenu.addAction(self.grabFrameBufferAct)
self.fileMenu.addAction(self.clearPixmapAct)
self.fileMenu.addSeparator()
self.fileMenu.addAction(self.exitAct)
self.helpMenu = self.menuBar().addMenu("&Help")
self.helpMenu.addAction(self.aboutAct)
self.helpMenu.addAction(self.aboutQtAct)
def createSlider(self, changedSignal, setterSlot):
slider = QSlider(Qt.Horizontal)
slider.setRange(0, 360 * 16)
slider.setSingleStep(16)
slider.setPageStep(15 * 16)
slider.setTickInterval(15 * 16)
slider.setTickPosition(QSlider.TicksRight)
slider.valueChanged.connect(setterSlot)
changedSignal.connect(slider.setValue)
return slider
def setPixmap(self, pixmap):
self.pixmapLabel.setPixmap(pixmap)
size = pixmap.size()
if size - QSize(1, 0) == self.pixmapLabelArea.maximumViewportSize():
size -= QSize(1, 0)
self.pixmapLabel.resize(size)
def getSize(self):
text, ok = QInputDialog.getText(self, "Grabber",
"Enter pixmap size:", QLineEdit.Normal,
"%d x %d" % (self.glWidget.width(), self.glWidget.height()))
if not ok:
return QSize()
regExp = QRegExp(r'([0-9]+) *x *([0-9]+)')
if regExp.exactMatch(text):
width = int(regExp.cap(1))
height = int(regExp.cap(2))
if width > 0 and width < 2048 and height > 0 and height < 2048:
return QSize(width, height)
return self.glWidget.size()
if __name__ == '__main__':
app = QApplication(sys.argv)
mainWin = MainWindow()
mainWin.show()
sys.exit(app.exec_())
