【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(100, 100);
    glutInitWindowSize(500, 500);
    glutCreateWindow("OpenGL正弦函数图像程序");
    glutDisplayFunc(&myDisplay);
    glutMainLoop();
    return 0;
}

 运行结果如下图所示：