63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
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#include <iostream>
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#include <gl/GL.h>
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#include <gl/GLU.h>
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#include <gl/GLUT.h>
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void display(void)
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{
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/* clear all pixels */
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glClear (GL_COLOR_BUFFER_BIT);
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/* draw white polygon (rectangle) with corners at
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* (0.25, 0.25, 0.0) and (0.75, 0.75, 0.0)
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*/
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glColor3f (1.0, 1.0, 1.0);
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glBegin(GL_POLYGON);
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glVertex3f (0.25, 0.25, 0.0);
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glVertex3f (0.75, 0.25, 0.0);
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glVertex3f (0.75, 0.75, 0.0);
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glVertex3f (0.25, 0.75, 0.0);
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glEnd();
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/* don't wait!
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* start processing buffered OpenGL routines
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*/
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glFlush ();
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}
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void init (void)
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{
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/* select clearing (background) color */
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glClearColor (0.0, 0.0, 0.0, 0.0);
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/* initialize viewing values */
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
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}
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/*
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* Declare initial window size, position, and display mode
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* (single buffer and RGBA). Open window with "hello"
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* in its title bar. Call initialization routines.
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* Register callback function to display graphics.
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* Enter main loop and process events.
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*/
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int main(int argc, char** argv)
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{
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glutInit(&argc, argv);
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glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
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glutInitWindowSize (250, 250);
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glutInitWindowPosition (100, 100);
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glutCreateWindow ("hello");
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init ();
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glutDisplayFunc(display);
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glutMainLoop();
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return 0; /* ISO C requires main to return int. */
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}
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