OpenGl simple example

Mon Mar 14, 2011 4:30 pm

Code:: #include <cstdlib> #include <GL/glut.h> #include <GL/glut.h> // Display callback ------------------------------------------------------------ void display() { // clear the draw buffer . glClear(GL_COLOR_BUFFER_BIT); // Erase everything // set the color to use in draw glColor3f(0.5, 0.5, 0.0); // create a polygon ( define the vertexs) glBegin(GL_POLYGON); { glVertex2f(-0.5, -0.5); glVertex2f(-0.5, 0.5); glVertex2f( 0.5, 0.5); glVertex2f( 0.5, -0.5); } glEnd(); // flush the drawing to screen . glFlush(); } // Keyboard callback function ( called on keyboard event handling ) void keyboard(unsigned char key, int x, int y) { if (key == 'q' || key == 'Q') exit(EXIT_SUCCESS); } // Main execution function int main(int argc, char *argv[]) { glutInit(&argc, argv); // Initialize GLUT glutCreateWindow("OpenGL example"); // Create a window glutDisplayFunc(display); // Register display callback glutKeyboardFunc(keyboard); // Register keyboard callback glutMainLoop(); // Enter main event loop return (EXIT_SUCCESS); }

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