Align individual objects in pyOpenGL to create a bigger aggregated object

Question

I'm trying to create a key object in PyOpenGL using a combination of torus, cylinder and a cuboid. I am able to get these three individual objects separately in the center of the window, but when I try to merge all these objects in a single window, I'm unable to do that.

This is the code.

import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *

vertices = (
    (0.75, -0.25, -0.5),
    (0.75, 0.25, -0.5),
    (-0.75, 0.25, -0.5),
    (-0.75, -0.25, -0.5),
    (0.75, -0.25, 0.5),
    (0.75, 0.25, 0.5),
    (-0.75, -0.25, 0.5),
    (-0.75, 0.25, 0.5),
    )

edges = (
    (0,1),
    (0,3),
    (0,4),
    (2,1),
    (2,3),
    (2,7),
    (6,3),
    (6,4),
    (6,7),
    (5,1),
    (5,4),
    (5,7),
    )

surfaces = (
    (0,1,2,3),
    (3,2,7,6),
    (6,7,5,4),
    (4,5,1,0),
    (1,5,7,2),
    (4,0,3,6),
    )

colors = (
    (1,0,0),
    (0,1,0),
    (0,0,1),
    (0,0,0),
    (1,1,1),
    (0,1,1),
    )

def draw_cuboid():
    glBegin(GL_QUADS)
    for surface in surfaces:
        x = 0
        for vertex in surface:
            x+=1
            glColor3fv(colors[x])
            glVertex3fv(vertices[vertex])
    glEnd()

    glBegin(GL_LINES)
    for egde in edges:
        for vertex in egde:
            glVertex3fv(vertices[vertex])
    glEnd()

def draw_cylinder():
    glRotatef(1, 1, 1.25, 12.5)
    glColor3f(1.0, 1.0, 0.0)
    quadratic = gluNewQuadric()
    gluQuadricNormals(quadratic, GLU_SMOOTH)
    gluQuadricTexture(quadratic, GL_TRUE)
    gluCylinder(quadratic, 0.15, 0.15, 2.5, 32, 32)

def draw_torus():
    glColor3f(0.0, 1.0, 0.0)
    glutWireTorus(0.2, 0.8, 50, 50)

def main():
    pygame.init()
    glutInit()
    display = (800,600)
    pygame.display.set_mode(display, DOUBLEBUF|OPENGL)

    gluPerspective(75, (display[0]/display[1]), 0.1, 50.0)

    glTranslatef(0.0, 0.0, -5)

    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()

            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    glTranslatef(-0.5, 0, 0)
                if event.key == pygame.K_RIGHT:
                    glTranslatef(0.5, 0, 0)

                if event.key == pygame.K_UP:
                    glTranslatef(0, 0.5, 0)
                if event.key == pygame.K_DOWN:
                    glTranslatef(0, -0.5, 0)

                if event.key == pygame.K_SPACE:
                    glRotatef(5, 0, 1, 0)   

            if event.type == pygame.MOUSEBUTTONDOWN:
                if event.button == 4:
                    glTranslatef(0, 0, 1.0)
                if event.button == 5:
                    glTranslatef(0, 0, -1.0)


        glRotatef(1, 3, 1, 1)
        glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
        draw_cuboid()
        draw_torus()
        draw_cylinder()
        pygame.display.flip()
        pygame.time.wait(10)

main()

The output I'm getting for this is below. output

As you see all the three objects are spawned from the center of the window.

1. How do I change their positions to get a key like object ie, the cylinder(aligned in y axis) in the center with the torus on top of it and the cuboid at the tip of other end?
2. How do I get this key aligned with y axis (constant without rotation by default) and with the press of the space key, I can start/stop rotation of this whole object along y axis?

Answer 1

    glRotatef(1, 3, 1, 1)
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)

    glTranslate(0.9, 0, 2)
    draw_cuboid()
    glTranslate(-0.9, 0, -2)

    glRotate(90,1,0,0)
    glTranslate(0,-1,0)
    draw_torus()
    glTranslate(0, 1, 0);
    glRotate(-90, 1, 0, 0)

    draw_cylinder()
    pygame.display.flip()
    pygame.time.wait(10)