Hello,
QGLWidget.renderText gives me an OpenGL error for Qt versions >= 4.3.0 that
prevents any further OpenGL output.
The example below works for Qt 4.2.3 but not above 4.3.0 (The second
message is not shown).
My platform is windows and I am using PyOpenGL-3.0.0b5
Have you managed to use QGLWidget.renderText with Qt versions above 4.3.0?
Is there a work around?
Thanks,
Armando
import PyQt4.Qt as qt
try:
import OpenGL.GL as GL
except ImportError:
raise ImportError, "OpenGL must be installed to use these functionalities"
class MyGLWidget(qt.QGLWidget):
def __init__(self, parent = None):
qt.QGLWidget.__init__(self, parent)
self.xsize = 512
self.ysize = 512
def initializeGL(self):
GL.glClearDepth(1.0)
GL.glClearColor(0.5, 0.5, 0.5, 1.0)
GL.glEnable(GL.GL_BLEND)
GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA)
GL.glShadeModel(GL.GL_FLAT)
GL.glDisable(GL.GL_DITHER)
GL.glMatrixMode(GL.GL_MODELVIEW)
GL.glDisable(GL.GL_CULL_FACE)
def resizeGL(self, width, height):
GL.glViewport(0, 0, width, height)
GL.glMatrixMode(GL.GL_PROJECTION)
GL.glLoadIdentity()
GL.glOrtho(0., 512., 0., 512., -self.xsize*self.ysize,
self.xsize*self.ysize)
GL.glMatrixMode(GL.GL_MODELVIEW)
GL.glLoadIdentity()
self.updateGL()
def paintGL(self):
GL.glClearColor(0.5, 0.5, 0.5, 1.0)
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
GL.glMatrixMode(GL.GL_MODELVIEW)
GL.glLoadIdentity()
text = "You should see a white triangle below AND a message"
GL.glColor3f(1., 1., 1.)
self.renderText(230, 400, 0, text,self.font())
GL.glBegin(GL.GL_TRIANGLES)
GL.glVertex3f(200., 200., 0)
GL.glVertex3f(300., 300., 0)
GL.glVertex3f(400., 200., 0)
GL.glEnd()
self.renderText(256, 100, 0, "Congrats. It is working",self.font())
if __name__ == "__main__":
app = qt.QApplication([])
window = MyGLWidget()
window.show()
app.exec_()
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