Using OpenGL to achieve 3D stereo display program code

Since the left eye and the right eye view the display from different angles, the image can be allocated to the right eye or the left eye by using this Angle difference to block the light. After the brain synthesizes the two different images into an image with spatial depth and dimensional information, the 3D image can be seen.
The complete implementation code is as follows:

#include "stdafx.h"
#include "GL/glut.h"
#include "stdlib.h"
#include "stdio.h"
#include "math.h"
static int big = 0;
static bool isLeftEye = false;
#define PI 3.1415926
const GLfloat R = 8.0;
static GLfloat leftMatrix[16] = {1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0,  0.0,
0.0, 0.0, 0.0, 1.0};
static GLfloat rightMatrix[16] = {1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 1.0};
static GLfloat leftPersMatrix[16] = {1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 1.0};
static GLfloat rightPersMatrix[16] = {1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 1.0};
void init(void)
{ 
 const GLfloat SD = 0.06;
 GLfloat n = SD*R/2.0;
 //If you turn to rank
 //n=0;
 leftMatrix[12] = n;
 rightMatrix[12] = -n;
 //So let's say that the eye to the screen is one meter, in meters
 GLfloat p = SD/(2*1*tan(PI/6)*1);
 //p = 0.0;
 leftPersMatrix[12] = -p;
 rightPersMatrix[12] = p;
 GLfloat mat_specular[] = {0.8, 0.8, 0.0, 1.0};
 GLfloat mat_shininess[] = {50.0};
 GLfloat light_position[] = {1.0, 1.0, 1.0, 0.0};
 GLfloat white_light[] = {1.0, 1.0, 1.0, 1.0};
 GLfloat yellow_light[] = {1.0, 1.0, 0.0, 1.0};
 GLfloat lmodel_ambient[] = {0.0, 0.7, 0.5, 1.0};
 glClearColor(1.0, 1.0, 1.0, 0.0);
 glShadeModel(GL_SMOOTH);
 glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
 glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);
 glLightfv(GL_LIGHT0, GL_POSITION, light_position);
 glLightfv(GL_LIGHT0, GL_DIFFUSE, yellow_light);//Color of the body
 glLightfv(GL_LIGHT0, GL_SPECULAR, white_light);//Color of highlights
 glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
 glEnable(GL_LIGHTING);
 glEnable(GL_LIGHT0);
 glEnable(GL_DEPTH_TEST);
}
void display(void)
{
 glColorMask(1.0, 1.0,1.0,1.0);
 glClearColor(0.0,0.0,0.0,1.0);
 glClearDepth(1.0);
 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 glColor3f(1.0, 1.0, 1.0);
 //Draw the left eye
 glMatrixMode(GL_PROJECTION);
 glPushMatrix();
 float mat[16];
 glGetFloatv(GL_PROJECTION_MATRIX,mat);
 glLoadIdentity();
 glMultMatrixf(leftPersMatrix);
 glMultMatrixf(mat);
 glMatrixMode(GL_MODELVIEW);
 glPushMatrix();
 glGetFloatv(GL_MODELVIEW_MATRIX,mat);
 glLoadIdentity();
 glMultMatrixf(leftMatrix);
 glMultMatrixf(mat);
 glColorMask(1.0, 0.0,0.0,1.0);
 glRotatef((GLfloat) big, 0.0, 1.0, 0.0);
 glutSolidTeapot(2.0);
 glPopMatrix();
 glMatrixMode(GL_PROJECTION);
 glPopMatrix();
 glFlush();
 //Pictures in the right eye
 glClearDepth(1.0);
 glClear(GL_DEPTH_BUFFER_BIT);
 glMatrixMode(GL_PROJECTION);
 glPushMatrix();
 glGetFloatv(GL_PROJECTION_MATRIX,mat);
 glLoadIdentity();
 glMultMatrixf(rightPersMatrix);
 glMultMatrixf(mat);
 glMatrixMode(GL_MODELVIEW);
 glPushMatrix();
 glGetFloatv(GL_MODELVIEW_MATRIX,mat);
 glLoadIdentity();
 glMultMatrixf(rightMatrix);
 glMultMatrixf(mat);
 glColorMask(0.0, 1.0,1.0,1.0);
 glRotatef((GLfloat) big, 0.0, 1.0, 0.0);
 glutSolidTeapot(2.0);
 glPopMatrix();
 glMatrixMode(GL_PROJECTION);
 glPopMatrix();
 glFlush();
 //glPopMatrix();
 //if(isLeftEye)
 //{ 
 // glMatrixMode(GL_PROJECTION);
 // glMultMatrixf(leftPersMatrix);
 // glMatrixMode(GL_MODELVIEW);
 // glMultMatrixf(leftMatrix);
 // glColorMask(1.0, 0.0,0.0,1.0);
 // 
 // 
 // 
 // isLeftEye = false;
 //}else
 //{ 
 // 
 // glMatrixMode(GL_PROJECTION);
 // glMultMatrixf(rightPersMatrix);
 // glMatrixMode(GL_MODELVIEW);
 // glMultMatrixf(rightMatrix);
 // glColorMask(0.0, 1.0,1.0,1.0); 
 // isLeftEye = true;
 //}
 //glRotatef((GLfloat) big, 0.0, 1.0, 0.0);
 //glutSolidTeapot(1.0);
 //glRotatef((GLfloat) big, 0.0, 1.0, 0.0);
 //glTranslatef(3.0, 0.0, 0.0);
 //glutSolidTeapot(0.5);
 glutSwapBuffers();
}
void reshape(int w, int h)
{
 glViewport(0, 0, (GLsizei) w, (GLsizei) h);
 glMatrixMode(GL_PROJECTION);
 glLoadIdentity();
 gluPerspective(60, (GLfloat)w/(GLfloat)h, 0.01, 20.0);
 glMatrixMode(GL_MODELVIEW);
 glLoadIdentity();
 gluLookAt(0.0, 0.0, R, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0 );
}
void keyboard(unsigned char key, int x, int y)
{
 switch (key)
 {
 case 'b':
  big = (big + 1) % 360;
  glutPostRedisplay();
  break;
 case 'B':
  big = (big - 1) % 360;
  glutPostRedisplay();
  break;
 case 27:    //Exit the program when the ESC key is pressed
  exit (0);
  break;
 default:
  break;
 }
}
void spinDisplay(void)
{
 big = (big + 1) % 360;
 glutPostRedisplay();
}
int main (int argc, char** argv)
{
 glutInit(&argc, argv);
 glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
 glutInitWindowSize(500, 500);
 glutInitWindowPosition(100, 100);
 glutCreateWindow(argv[0]);
 init();
 glutDisplayFunc(display);
 glutReshapeFunc(reshape);
 glutKeyboardFunc(keyboard);
 glutIdleFunc(spinDisplay);
 glutMainLoop();
 return 0;
} 

The final rendering is as follows: < img Alt = "" border = 0 SRC =" / / files.jb51.net/file_images/article/201305/201305241045465.gif ">