????????????????

natural

#include <windows.h> // Standard windows include
#include <gl\gl.h> // OpenGL library
#include <gl\glut.h> // glut library
#define GL_PI 3.1415f
#include <math.h>
#include "stdio.h"

void SetupRC( void )
{
        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

        glColor3f( 0.0f, 1.0f, 0.0f );
       
}

void  RenderScene(void)
{
// Set background clearing color to blue

// Clear the window with current clearing color
        GLfloat x,y,z,angle,xRot,yRot;
       
        xRot =0.0f;
        yRot =0.0f;

        glClear(GL_COLOR_BUFFER_BIT);

        glPushMatrix();

       
        glRotatef( xRot, 1.0f, 0.0f, 0.0f );
        glRotatef( yRot, 0.0f, 1.0f, 0.0f );

        glBegin( GL_POINTS);
       
        z = -50.0f;

        for(angle = 0.0f; angle <= (2.0f*GL_PI)*3.0f; angle += 0.1f)
        {
                x = 50.0f*sin(angle);
                y = 50.0f*cos(angle);
               
                // Specify the point and move the Z value up a little
                glVertex3f(x, y, z);
                z += 0.5f;
        }
        // Done drawing points
        glEnd();
        // Restore transformations
        glPopMatrix();
        // Flush drawing commands
        glFlush();
}



// Main body of program
void main(void)
{
// AUX window setup and initialization
        glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
       
        glutCreateWindow("points example ");

        glutDisplayFunc( RenderScene );
// Set function to call when window is resized


        SetupRC();
// Start main loop
        glutMainLoop();
}

2gou

???????.
?RENDERSCENE????
glutSwapBuffers();??.

2gou

??????glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB)??

natural

??????????????

Deen

??? glViewPort() ? ?

2gou

????????.
?X,Y,Z???100???.

natural

????????????

2gou

??glVertex3f(x/100.0f, y/100.0f, z/100.0f);

2gou

????????MATRIX.

natural

???????????MATRIX?????