openGL绘制正弦曲线

const GLfloat factor = 0.1f;void display(){GLfloat x;glClear(GL_COLOR_BUFFER_BIT);glBegin(GL_LINES);glVertex2f(-1.0, 0.0);glVertex2f(1.0, 0.0);glVertex2f(0.0, -1.0);glVertex2f(0.0, 1.0);glEnd();glBegin(GL_LINE_STRIP);for (x = -1.0/factor; x < 1.0/factor; x+=0.01){glVertex2f(x*factor, sin(x)*factor);}glEnd();glFlush();}int main(int argc, char **argv){glutInit(&argc, argv);glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);glutInitWindowPosition(100, 100);glutInitWindowSize(500, 200);glutCreateWindow("opengl 3d view");//init();glutDisplayFunc(display);glutMainLoop();return 0;}一、当factor=0.1时

二、当factor=0.3时