1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
| #include<GL/glut.h >
void init(void) { glClearColor(1.0, 1.0, 1.0, 0.0); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(0.0, 200.0, 0.0, 150); }
void linesegment(void) { glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0, 0.0, 0.0); glBegin(GL_LINES); glVertex2i(180, 15); glVertex2i(10, 145); glEnd(); glFlush(); }
int main(int argc, char ** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutInitWindowPosition(50, 100); glutInitWindowSize(400, 300); glutCreateWindow(" An Example OpenGL Program"); init(); glutDisplayFunc(linesegment); glutMainLoop(); return 0; }
|