【openGL】画正弦函数图像

 #include "stdafx.h"
 #include <GL/glut.h>
 #include <stdlib.h>
 #include <math.h>
 #include <stdio.h>

 const GLfloat factor = 0.1f;
 void myDisplay(void) {
     GLfloat x;
     glClear(GL_COLOR_BUFFER_BIT);
     glBegin(GL_LINES);
     glVertex2f(-1.0f, 0.0f);
     glVertex2f(1.0f, 0.0f);
     glVertex2f(0.0f, -1.0f);
     glVertex2f(0.0f, 1.0f);
     glEnd();
     glBegin(GL_LINE_STRIP);
     for (x = -1.0f / factor; x<1.0f / factor; x += 0.01f) {
         glVertex2f(x*factor, sin(x)*factor);
     }
     glEnd();
     glFlush();
 }

 int main(int argc, char *argv[]) {
     glutInit(&argc, argv);
     glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
     glutInitWindowPosition(, );
     glutInitWindowSize(, );
     glutCreateWindow("OpenGL正弦函数图像程序");
     glutDisplayFunc(&myDisplay);
     glutMainLoop();
     return ;
 }

运行结果如下图所示：