prg4.txt

//#include<windows.h>
#include<GL/glu.h>
#include<GL/glut.h>
#include<stdio.h>

GLfloat Cx=0,Cy=0,Cz=3;

void MyInit()
{
    glClearColor(0,0,0,1);
    glEnable(GL_DEPTH_TEST);

    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glFrustum(-1,1,-1,1,2,10);
    glMatrixMode(GL_MODELVIEW);
}

void Square(GLfloat A[],GLfloat B[],GLfloat C[],GLfloat D[])
{
    glBegin(GL_POLYGON);
        glVertex3fv(A);
        glVertex3fv(B);
        glVertex3fv(C);
        glVertex3fv(D);
    glEnd();
}

void Cube(GLfloat V0[],GLfloat V1[],GLfloat V2[],GLfloat V3[],GLfloat V4[],GLfloat V5[],GLfloat V6[],GLfloat V7[])
{
    glColor3f(1,0,0);
    Square(V0,V1,V2,V3);
    glColor3f(0,1,0);
    Square(V4,V5,V6,V7);
    glColor3f(0,0,1);
    Square(V0,V4,V7,V3);
    glColor3f(1,1,0);
    Square(V1,V5,V6,V2);
    glColor3f(1,0,1);
    Square(V3,V2,V6,V7);
    glColor3f(0,1,1);
    Square(V0,V1,V5,V4);
}

void Draw()
{
    GLfloat V[8][3] =   {
                            {-0.5, 0.5, 0.5},
                            { 0.5, 0.5, 0.5},
                            { 0.5,-0.5, 0.5},
                            {-0.5,-0.5, 0.5},
                            {-0.5, 0.5,-0.5},
                            { 0.5, 0.5,-0.5},
                            { 0.5,-0.5,-0.5},
                            {-0.5,-0.5,-0.5}
                        };
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glLoadIdentity();
    gluLookAt(Cx,Cy,Cz,0,0,0,0,1,0);

    Cube(V[0],V[1],V[2],V[3],V[4],V[5],V[6],V[7]);

    glutSwapBuffers();
}

void Key(unsigned char ch,int x,int y)
{
    switch(ch)
    {
        case 'x' : Cx = Cx - 0.5;   break;
        case 'X' : Cx = Cx + 0.5;   break;

        case 'y' : Cy = Cy - 0.5;   break;
        case 'Y' : Cy = Cy + 0.5;   break;

        case 'z' : Cz = Cz - 0.5;   break;
        case 'Z' : Cz = Cz + 0.5;   break;
    }
    glutPostRedisplay();
}

int main(int argC,char *argV[])
{
    glutInit(&argC,argV);
    glutInitWindowSize(600,600);
    glutInitWindowPosition(100,150);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("Color Cube with Camera");
    MyInit();
    glutDisplayFunc(Draw);
    glutKeyboardFunc(Key);
    glutMainLoop();
    return 0;
}