pyopengl

问题 I tried everything but still I don't get my error. I am trying to put a texture on my sphere object. """ Minimal texture on sphere demo This is demo for showing how to put image on sphere as texture in PyOpenGL. """ from OpenGL.GLUT import * from OpenGL.GLU import * from OpenGL.GL import * from PIL import Image import numpy def run_scene(): glutInit() glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH) glutCreateWindow("Minimal sphere OpenGL") lightning() glutDisplayFunc(draw_sphere)

问题 I've been given an opengl example demonstrating how to use a texture to display a 2d image. I've extended the example to render in a QOpenGLWidget . Now I want to use a QTimer to create an animation. The code below should draw a randomly generated 16x16 greyscale image to a texture every time paintGL() is called. A QTimer calls update() every 250ms but I am only seeing updates to the scene when I resize the window and I can't work out why. I have limited experience with opengl and don't fully

问题 I've been given an opengl example demonstrating how to use a texture to display a 2d image. I've extended the example to render in a QOpenGLWidget . Now I want to use a QTimer to create an animation. The code below should draw a randomly generated 16x16 greyscale image to a texture every time paintGL() is called. A QTimer calls update() every 250ms but I am only seeing updates to the scene when I resize the window and I can't work out why. I have limited experience with opengl and don't fully

问题 Motivated by my incomplete answer to this question, I am implementing a simple skybox in PyOpenGL in accordance with this tutorial, making minor tweaks as needed for OpenGL 2.1/GLSL 120 and python2.7-isms. For the most part, it works successfully, but depending on what six images I pass to my cubemap, the images either end up swapped between a single pair of opposite faces or are randomly rotated ! Below is the main class of this demo: import pygame import sys import time import glob import

问题 I have polygons in the form: [(1,2), (2,4), (3,4), (5,6)] I need tessellation to draw them, but glutess is too complicated. Opengl cannot handle convex polygons. I think I need something like: http://www.math.uiuc.edu/~gfrancis/illimath/windows/aszgard_mini/pylibs/OpenGLContext/scenegraph/polygontessellator.py But I don't understand how to use it. Can anyone give me a clear example? It have to use pyopengl as it has to integrate with another project (pygame etc won't work) Alternatively, is

问题 I use PyGLM and PyOpenGL I have specified the following Shader Storage Buffer in the Vertex Shader: layout(std430, binding = 1) buffer MVP { mat4 u_proj; mat4 u_view; mat4 u_model; } mvp_data; I have initialized the model, view and projection matrix: model = glm.mat4(1) view = glm.lookAt(glm.vec3(0,-3,0), glm.vec3(0,0,0), glm.vec3(0,0,1)) proj = glm.perspective(glm.radians(90), self.__vp_size[0]/self.__vp_size[1], 0.1, 100) How can the buffer object's data store be created and initialized

问题 For some reason, the cube does not move around the screen, though it spins. This is with the use of the functions m3dTranslateMatrix44 and m3dRotationMatrix44 though there seems a better way. Modified rotation_matrix(axis, theta) to produce a 4x4 matrix hopefully correctly. I think perhaps it may be to create a mv_matrix through the use of numpy multiplication. Done that. But still off a bit. Update - June 24, 2019: After some explanation and excellent code by Rabbid76 the program is now

问题 I'm working with Anaconda Python 3. I'm trying to install pyOpenGL, Vpython and pygame. Installing pyOpenGL and Vpython is fine using conda install . When I try to install Pygame, using conda install it shows: conda install -c https://conda.binstar.org/kne pygame #same for conda install pygame ... The following NEW packages will be INSTALLED: . . . The following packages will be REMOVED: backports.os-0.1.1-py37_0 importlib_metadata-0.8-py37_0 jeepney-0.4-py37_0 jupyterlab_server-0.2.0-py37_0

问题 I've been looking around for a way to anti-alias lines in OpenGL, but none of them seem to work... here's some example code: import pyglet from pyglet.gl import * window = pyglet.window.Window(resizable=True) @window.event def on_draw(): window.clear() pyglet.gl.glColor4f(1.0,0,0,1.0) glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) glEnable (GL_BLEND) glEnable (GL_LINE_SMOOTH); glHint (GL_LINE_SMOOTH_HINT, GL_DONT_CARE) glLineWidth (3) pyglet.graphics.draw(2, pyglet.gl.GL_LINES, ('v2i',

问题 EDIT Ok I added some changes to my texture rendering, and I'm now at a point that it doesn't look how I want it but before I try to change anything I just want to be sure I'm on the right path. The problem I'm trying to fix is: I have 180000 vertices. Each of them can be from one of 190 "classes". Each class can have a different color assigned at a different time. So I'm trying to create a texture with 190 colors, and for each of the 180000 vertexes have a textureCoord to the coresponding