【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：