pyopengl

I recently started to learn OpenGL through Python thanks to several tutorial (especially the Nicolas P. Rougier one: http://www.labri.fr/perso/nrougier/teaching/opengl/ ). I am now switching to 3D and I am trying to draw a cube. Thus, I manage to get some triangles which do not render a cube (this seems to be normal as I do not duplicate my vertices and I use the glDrawArrays function). However, after, I build an index "vector" to further use the glDrawElements function to render my cube. As a result, I do not get any error but nothing appears on screen. I hope you could be of some help! Here

I have the following code which should simply draw a green triangle to the screen. It is using Vertex Array Objects and index buffers to draw and has the simplest shader I could make. At first I was not using index buffers and was simply making the draw call with glDrawArrays which worked fine but when I change it to use glDrawElements then nothing is drawn to the screen (it is entirely black). from OpenGL.GL import shaders from OpenGL.arrays import vbo from OpenGL.GL import * from OpenGL.raw.GL.ARB.vertex_array_object import glGenVertexArrays, \ glBindVertexArray import pygame import numpy as

Ok so I'm still struggling to get this to work. The important parts of my code are: def __init__(self, vertices, normals, triangles): self.bufferVertices = glGenBuffersARB(1) glBindBufferARB(GL_ARRAY_BUFFER_ARB, self.bufferVertices) glBufferDataARB(GL_ARRAY_BUFFER_ARB, ADT.arrayByteCount(vertices), ADT.voidDataPointer(vertices), GL_STATIC_DRAW_ARB) self.vertices = vertices self.bufferNormals = glGenBuffersARB(1) glBindBufferARB(GL_ARRAY_BUFFER_ARB, self.bufferNormals) glBufferDataARB(GL_ARRAY_BUFFER_ARB, ADT.arrayByteCount(normals), ADT.voidDataPointer(normals), GL_STATIC_DRAW_ARB) self

I just installed it with apt-get on debian linux with apt-get install libqt4-opengl the rest of PyQt4 is available, but I cant get to this new module. from PyQt4 import QtOpenGL raises ImportError. any idea what to do? Did you forget to install the Python bindings? apt-get install python-qt4-gl For Python3, I had to do sudo apt-get install python3-pyqt4.qtopengl 来源： https://stackoverflow.com/questions/1419650/just-installed-qtopengl-but-cannot-import-it-from-python

Basically, I'm trying to extract a depth map (by this I mean a matrix with z corresponding to z-coordinates for vertices in GL.glVertex3dv(vertex) call - obviously, interpolated for plane pixels) after rendering a model (script is loading the model from file with path specified as the first command line argument). There are several questions which come to mind: why glReadPixels call returns a numpy array with shape (width, shape) , instead of (height, width) ? why it returns some trash, not connected to the rendered model? is there an easy way to get z-coordinates on OpenGL legacy code with

I've created a couple of floating point RGBA texture... glBindTexture( GL_TEXTURE_2D, texid[k] ); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER); glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0, GL_RGBA, GL_FLOAT, data); and then I double-buffer render/sample into them alternately in a shader program glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL

I'm starting a computer graphics course, and I have to choose a language. Choices are between C++ and Python. I have no problem with C++, python is a work in progress. So i was thinking to go down the python road, using pyopengl for graphics part. I have heard though, that performance is an issue. Is python / pyopengl mature enough to challenge C++ on performance? I realize its a long shot, but I'd like to hear your thoughts, experiences on uses of pyopengl. Thanks in advance. It depends a LOT on the contents of your computer graphics course. If you are doing anything like the introductory