#include <GL/glut.h>
#include <stdlib.h>

GLfloat bottomVertices[][3] = {
    {-0.5f, -0.5f, -0.5f},
    {-0.5f, 0.5f, -0.5f},
    {0.5f, -0.5f, -0.5f},
    {0.5f, 0.5f, -0.5f}
};

GLfloat topVertices[][3] = {
    {-0.25f, -0.25f, 0.5f},
    {-0.25f, 0.25f, 0.5f},
    {0.25f, -0.25f, 0.5f},
    {0.25f, 0.25f, 0.5f}
};

GLfloat colors[][3] = {
    {1.0f, 0.0f, 0.0f}, // red
    {1.0f, 1.0f, 0.0f}, // yellow
    {0.0f, 1.0f, 0.0f}, // green
    {0.0f, 1.0f, 1.0f}, // cyan
    {0.0f, 0.0f, 1.0f}, // blue
    {1.0f, 0.0f, 1.0f}  // magenta
};

void drawFrustum()
{
    glPushMatrix();
    glTranslatef(0.0f, 0.0f, -5.0f);

    glBegin(GL_QUADS);

    // Draw bottom face in red
    glColor3fv(colors[0]);
    glVertex3fv(bottomVertices[0]);
    glVertex3fv(bottomVertices[1]);
    glVertex3fv(bottomVertices[3]);
    glVertex3fv(bottomVertices[2]);

    // Draw top face in yellow
    glColor3fv(colors[1]);
    glVertex3fv(topVertices[0]);
    glVertex3fv(topVertices[1]);
    glVertex3fv(topVertices[3]);
    glVertex3fv(topVertices[2]);

    // Draw left face in green
    glColor3fv(colors[2]);
    glVertex3fv(bottomVertices[0]);
    glVertex3fv(bottomVertices[1]);
    glVertex3fv(topVertices[1]);
    glVertex3fv(topVertices[0]);

    // Draw right face in cyan
    glColor3fv(colors[3]);
    glVertex3fv(bottomVertices[2]);
    glVertex3fv(bottomVertices[3]);
    glVertex3fv(topVertices[3]);
    glVertex3fv(topVertices[2]);

    // Draw back face in blue
    glColor3fv(colors[4]);
    glVertex3fv(bottomVertices[0]);
    glVertex3fv(bottomVertices[2]);
    glVertex3fv(topVertices[2]);
    glVertex3fv(topVertices[0]);

    // Draw front face in magenta
    glColor3fv(colors[5]);
    glVertex3fv(topVertices[3]);
    glVertex3fv(bottomVertices[3]);
    glVertex3fv(bottomVertices[1]);
    glVertex3fv(topVertices[1]);

    glEnd();

    glPopMatrix();
}

void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
drawFrustum();
glutSwapBuffers();
}

void reshape(int w, int h)
{
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0, (GLfloat)w/(GLfloat)h, 1.0, 20.0);
}

int main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(500, 500);
glutCreateWindow("Frustum");
glClearColor(1.0f, 1.0f, 1.0f, 1.0f);

glutDisplayFunc(display);
glutReshapeFunc(reshape);

glutMainLoop();
return 0;
}