#!/usr/bin/env python """ helloglwidget.py A simple OpenGL custom widget for Qt Designer. Copyright (C) 2007 David Boddie Copyright (C) 2005-2006 Trolltech ASA. All rights reserved. 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 2 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, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA """ import math from PyQt5.QtCore import pyqtProperty, pyqtSignal, pyqtSlot, QPoint, QSize, Qt from PyQt5.QtGui import QColor from PyQt5.QtWidgets import QApplication, QOpenGLWidget class HelloGLWidget(QOpenGLWidget): """HelloGLWidget(QOpenGLWidget) Provides a custom widget to display an OpenGL-rendered Qt logo. Various properties and slots are defined so that the user can rotate the logo, and signals are defined to enable other components to react to changes to its orientation. """ # We define three signals that are used to indicate changes to the # rotation of the logo. xRotationChanged = pyqtSignal(int) yRotationChanged = pyqtSignal(int) zRotationChanged = pyqtSignal(int) def __init__(self, parent=None): super(HelloGLWidget, self).__init__(parent) self.object = 0 self.xRot = 0 self.yRot = 0 self.zRot = 0 self.lastPos = QPoint() self.trolltechGreen = QColor.fromCmykF(0.40, 0.0, 1.0, 0.0) self.trolltechPurple = QColor.fromCmykF(0.39, 0.39, 0.0, 0.0) self.setWindowTitle("Hello GL") # The rotation of the logo about the x-axis can be controlled using the # xRotation property, defined using the following getter and setter # methods. def getXRotation(self): return self.xRot # The setXRotation() setter method is also a slot. @pyqtSlot(int) def setXRotation(self, angle): angle = self.normalizeAngle(angle) if angle != self.xRot: self.xRot = angle self.xRotationChanged.emit(angle) self.update() xRotation = pyqtProperty(int, getXRotation, setXRotation) # The rotation of the logo about the y-axis can be controlled using the # yRotation property, defined using the following getter and setter # methods. def getYRotation(self): return self.yRot # The setYRotation() setter method is also a slot. @pyqtSlot(int) def setYRotation(self, angle): angle = self.normalizeAngle(angle) if angle != self.yRot: self.yRot = angle self.yRotationChanged.emit(angle) self.update() yRotation = pyqtProperty(int, getYRotation, setYRotation) # The rotation of the logo about the z-axis can be controlled using the # zRotation property, defined using the following getter and setter # methods. def getZRotation(self): return self.zRot # The setZRotation() setter method is also a slot. @pyqtSlot(int) def setZRotation(self, angle): angle = self.normalizeAngle(angle) if angle != self.zRot: self.zRot = angle self.zRotationChanged.emit(angle) self.update() zRotation = pyqtProperty(int, getZRotation, setZRotation) def minimumSizeHint(self): return QSize(50, 50) def sizeHint(self): return QSize(200, 200) def initializeGL(self): self.gl = self.context().versionFunctions() self.gl.initializeOpenGLFunctions() self.setClearColor(self.trolltechPurple.darker()) self.object = self.makeObject() self.gl.glShadeModel(self.gl.GL_SMOOTH) self.gl.glEnable(self.gl.GL_DEPTH_TEST) self.gl.glEnable(self.gl.GL_CULL_FACE) def paintGL(self): self.gl.glClear(self.gl.GL_COLOR_BUFFER_BIT | self.gl.GL_DEPTH_BUFFER_BIT) self.gl.glLoadIdentity() self.gl.glTranslated(0.0, 0.0, -10.0) self.gl.glRotated(self.xRot / 16.0, 1.0, 0.0, 0.0) self.gl.glRotated(self.yRot / 16.0, 0.0, 1.0, 0.0) self.gl.glRotated(self.zRot / 16.0, 0.0, 0.0, 1.0) self.gl.glCallList(self.object) def resizeGL(self, width, height): side = min(width, height) self.gl.glViewport((width - side) / 2, (height - side) / 2, side, side) self.gl.glMatrixMode(self.gl.GL_PROJECTION) self.gl.glLoadIdentity() self.gl.glOrtho(-0.5, +0.5, +0.5, -0.5, 4.0, 15.0) self.gl.glMatrixMode(self.gl.GL_MODELVIEW) def mousePressEvent(self, event): self.lastPos = QPoint(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 = QPoint(event.pos()) def makeObject(self): genList = self.gl.glGenLists(1) self.gl.glNewList(genList, self.gl.GL_COMPILE) self.gl.glBegin(self.gl.GL_QUADS) x1 = +0.06 y1 = -0.14 x2 = +0.14 y2 = -0.06 x3 = +0.08 y3 = +0.00 x4 = +0.30 y4 = +0.22 self.quad(x1, y1, x2, y2, y2, x2, y1, x1) self.quad(x3, y3, x4, y4, y4, x4, y3, x3) self.extrude(x1, y1, x2, y2) self.extrude(x2, y2, y2, x2) self.extrude(y2, x2, y1, x1) self.extrude(y1, x1, x1, y1) self.extrude(x3, y3, x4, y4) self.extrude(x4, y4, y4, x4) self.extrude(y4, x4, y3, x3) Pi = 3.14159265358979323846 NumSectors = 200 for i in range(NumSectors): angle1 = (i * 2 * Pi) / NumSectors x5 = 0.30 * math.sin(angle1) y5 = 0.30 * math.cos(angle1) x6 = 0.20 * math.sin(angle1) y6 = 0.20 * math.cos(angle1) angle2 = ((i + 1) * 2 * Pi) / NumSectors x7 = 0.20 * math.sin(angle2) y7 = 0.20 * math.cos(angle2) x8 = 0.30 * math.sin(angle2) y8 = 0.30 * math.cos(angle2) self.quad(x5, y5, x6, y6, x7, y7, x8, y8) self.extrude(x6, y6, x7, y7) self.extrude(x8, y8, x5, y5) self.gl.glEnd() self.gl.glEndList() return genList def quad(self, x1, y1, x2, y2, x3, y3, x4, y4): self.setColor(self.trolltechGreen) self.gl.glVertex3d(x1, y1, -0.05) self.gl.glVertex3d(x2, y2, -0.05) self.gl.glVertex3d(x3, y3, -0.05) self.gl.glVertex3d(x4, y4, -0.05) self.gl.glVertex3d(x4, y4, +0.05) self.gl.glVertex3d(x3, y3, +0.05) self.gl.glVertex3d(x2, y2, +0.05) self.gl.glVertex3d(x1, y1, +0.05) def extrude(self, x1, y1, x2, y2): self.setColor(self.trolltechGreen.darker(250 + int(100 * x1))) self.gl.glVertex3d(x1, y1, +0.05) self.gl.glVertex3d(x2, y2, +0.05) self.gl.glVertex3d(x2, y2, -0.05) self.gl.glVertex3d(x1, y1, -0.05) def normalizeAngle(self, angle): while angle < 0: angle += 360 * 16 while angle > 360 * 16: angle -= 360 * 16 return angle def setClearColor(self, c): self.gl.glClearColor(c.redF(), c.greenF(), c.blueF(), c.alphaF()) def setColor(self, c): self.gl.glColor4f(c.redF(), c.greenF(), c.blueF(), c.alphaF()) if __name__ == "__main__": import sys app = QApplication(sys.argv) widget = HelloGLWidget() widget.show() sys.exit(app.exec_())