【openGL】画正弦函数图像

 1 #include "stdafx.h"
 2 #include <GL/glut.h>
 3 #include <stdlib.h>
 4 #include <math.h>
 5 #include <stdio.h>
 6
 7 const GLfloat factor = 0.1f;
 8 void myDisplay(void) {
 9     GLfloat x;
10     glClear(GL_COLOR_BUFFER_BIT);
11     glBegin(GL_LINES);
12     glVertex2f(-1.0f, 0.0f);
13     glVertex2f(1.0f, 0.0f);
14     glVertex2f(0.0f, -1.0f);
15     glVertex2f(0.0f, 1.0f);
16     glEnd();
17     glBegin(GL_LINE_STRIP);
18     for (x = -1.0f / factor; x<1.0f / factor; x += 0.01f) {
19         glVertex2f(x*factor, sin(x)*factor);
20     }
21     glEnd();
22     glFlush();
23 }
24
25 int main(int argc, char *argv[]) {
26     glutInit(&argc, argv);
27     glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
28     glutInitWindowPosition(100, 100);
29     glutInitWindowSize(500, 500);
30     glutCreateWindow("OpenGL正弦函数图像程序");
31     glutDisplayFunc(&myDisplay);
32     glutMainLoop();
33     return 0;
34 }

运行结果如下图所示：