日期:2014-05-16 浏览次数:20605 次
#include <GL/glut.h> #define window_width 640 #define window_height 480 // Main loop void main_loop_function() { // Z angle static float angle; // Clear color (screen) // And depth (used internally to block obstructed objects) glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Load identity matrix glLoadIdentity(); // Multiply in translation matrix glTranslatef(0, 0, -10); // Multiply in rotation matrix glRotatef(angle, 0, 0, 1); // Render colored quad glBegin(GL_QUADS); glColor3ub(255, 000, 000); glVertex2f(-1, 1); glColor3ub(000, 255, 000); glVertex2f(1, 1); glColor3ub(000, 000, 255); glVertex2f(1, -1); glColor3ub(255, 255, 000); glVertex2f(-1, -1); glEnd(); // Swap buffers (color buffers, makes previous render visible) glutSwapBuffers(); // Increase angle to rotate angle += 0.25; } // Initialze OpenGL perspective matrix void GL_Setup(int width, int height) { glViewport(0, 0, width, height); glMatrixMode(GL_PROJECTION); glEnable(GL_DEPTH_TEST); gluPerspective(45, (float) width / height, .1, 100); glMatrixMode(GL_MODELVIEW); } // Initialize GLUT and start main loop int main(int argc, char** argv) { glutInit(&argc, argv); glutInitWindowSize(window_width, window_height); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE); glutCreateWindow("GLUT Example!!!"); glutIdleFunc(main_loop_function); GL_Setup(window_width, window_height); glutMainLoop(); return 0; }