glut

I started playing around with OpenGL and GLUT. I would like to draw some points, but the problem is that they turn out to be squares, and I would like them to be round dots (filled circles). This is what I do: void onInitialization( ) { glEnable( GL_POINT_SMOOTH ); glEnable( GL_BLEND ); glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ); glPointSize( 6.0 ); } void onDisplay() { glClearColor( 1.0f, 1.0f, 1.0f, 1.0f ); glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); glBegin( GL_POINTS ); glColor3f( 0.95f, 0.207, 0.031f ); for ( int i = 0; i < g_numPoints; ++i ) { glVertex2f( g_points[i].X

I'm writing a game for school in OpenGL. Since there will be several more similar assignments I want to make a small framework for doing common things in OpenGL. I have made a few simple games before and I usually break it down into an IO class to handle input and drawing to the screen, Game class for the main game loop/logic, and classes for whatever objects there are in the game. Before I was using SDL, so my question is, is this the right way of going about this in OpenGL? I've already ran into some trouble. I want my IO class to handle initializing the window, drawing the scene, and mouse

I'm writing a simple OpenGL application that uses GLUT . I don't want to roll my own font rendering code, instead I want to use the simple bitmap fonts that ship with GLUT . What are the steps to get them working? Simple text display is easy to do in OpenGL using GLUT bitmap fonts. These are simple 2D fonts and are not suitable for display inside your 3D environment. However, they're perfect for text that needs to be overlayed on the display window. Here are the sample steps to display Eric Cartman's favorite quote colored in green on a GLUT window: We'll be setting the raster position in

On 64-bit Ubuntu 14.04 LTS, I am trying to compile a simple OpenGL program that uses glut. I am getting a Segmentation Fault (SIGSEV) before any line of code is executed in main; even on a very stripped down test program. What could cause this? My command line: g++ -Wall -g main.cpp -lglut -lGL -lGLU -o main My simple test case: #include <GL/gl.h> #include <GL/glu.h> #include <GL/glut.h> #include <string> #include <cstdio> int main(int argc, char** argv){ printf("Started\n"); std::string dummy = "hello"; glutInit(&argc, argv); return 0; } When I run the program, the printf at the beginning of

I have a moving 3d scene set up, and I want to make a stationary 2d GUI overlay that is always on top, when I try making 2d shapes I don't see anything. When I call: glMatrixMode(GL_PROJECTION); my 3d scene disappears and I'm left with a blank window... here is the code I'm using for the overlay EDIT: updated code glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(-100, 100, -100, 100); glDisable(GL_DEPTH_TEST); glDisable(GL_CULL_FACE); glDisable(GL_TEXTURE_2D); glDisable(GL_LIGHTING); glColor3f(1, 1, 1); glPushMatrix(); glBegin(GL_QUADS);

I am running Anaconda Python 2.7 on a Win7 x64 machine and used pip install PyOpenGL PyOpenGL_accelerate at the Anaconda command line to install PyOpenGL. I have some code (not my own I must confess) that makes use of glutInit import sys import math import numpy import OpenGL from OpenGL.GL import * from OpenGL.GLUT import * import Image import linkage # ... a whole load of definitions etc ... glutInit(sys.argv) glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB) glutInitWindowSize(600, 600) glutCreateWindow('linkage') init() initWindow() glutIdleFunc(idle) glutMainLoop() I run by entering the