How do you use glBufferData() in the PyOpenGL python bindings to OpenGL?
When I run the following code
import sys
from OpenGL.GL import *
from PySide.QtCore import *
from PySide.QtGui import *
from PySide.QtOpenGL import *
class SimpleTestWidget(QGLWidget):
def __init__(self):
QGLWidget.__init__(self)
def initializeGL(self):
self._vertexBuffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self._vertexBuffer)
vertices = [0.5, 0.5, -0.5, 0.5, -0.5, -0.5, 0.5, -0.5]
glBufferData(GL_ARRAY_BUFFER, vertices, GL_STATIC_DRAW) # Error
def paintGL(self):
glViewport(0, 0, self.width(), self.height())
glClearColor(0.0, 1.0, 0.0, 1.0)
glClear(GL_COLOR_BUFFER_BIT)
glEnableClientState(GL_VERTEX_ARRAY)
glBindBuffer(GL_ARRAY_BUFFER, self._vertexBuffer)
glVertexPointer(2, GL_FLOAT, 0, 0)
glColor3f(1.0, 0.0, 0.0)
glDrawArrays(GL_QUADS, 0, 4)
if __name__ == '__main__':
app = QApplication(sys.argv)
w = SimpleTestWidget()
w.show()
app.exec_()
then the call to glBufferData() results in the error message
Haven't implemented type-inference for lists yet
The code is supposed to paint a red rectangle on a green background.
As a workaround, until lists are supported, pass the vertices as a numpy array:
vertices = numpy.array([0.5, 0.5, -0.5, 0.5, -0.5, -0.5, 0.5, -0.5],
dtype='float32')
The glVertexPointer call should be glVertexPointer(2, GL_FLOAT, 0, None)