# Example of GLUT text functions, applied to character strings
#
# Dave Pape
# 27 September 2003

import sys
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *

viewDistance = 30
viewRotY = 0
viewRotX = 0

strokeText0 = "Stroke Text - Roman"
strokeText1 = "Stroke Text - MonoRoman"
bitmapText0 = "Bitmap Text - TimesRoman 24"
bitmapText1 = "Bitmap Text - Helvetica 10"


def draw():
    global viewRotX, viewRotY, viewDistance
    glClearColor(0.5, 0.7, 1.0, 0.0)
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)

    glLoadIdentity()
    glTranslatef(0.0, 0.0, -viewDistance)
    glRotatef(viewRotX, 1.0, 0.0, 0.0)
    glRotatef(viewRotY, 0.0, 1.0, 0.0)
    
    glColor4f(1, 1, 1, 1)
    glutWireTeapot(1)

    glColor4f(1, 0, 0, 1)

    glPushMatrix()
    glTranslatef(-1, -1.5, 0)
    glScalef(0.005, 0.005, 0.005)
    for c in strokeText0:
        glutStrokeCharacter(GLUT_STROKE_ROMAN, ord(c))
    glPopMatrix()

    glPushMatrix()
    glTranslatef(-1, -3, 0)
    glScalef(0.005, 0.005, 0.005)
    for c in strokeText1:
        glutStrokeCharacter(GLUT_STROKE_MONO_ROMAN, ord(c))
    glPopMatrix()

    glRasterPos3f(-3, 1, 0)
    for c in bitmapText0:
        glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24, ord(c))

    glRasterPos3f(-3, 2, 0)
    for c in bitmapText1:
        glutBitmapCharacter(GLUT_BITMAP_HELVETICA_12, ord(c))

    glutSwapBuffers()


def keyboard(key, x, y):
    global viewDistance
    if key == chr(27):
        sys.exit(0)
    elif key == '.':
        viewDistance = viewDistance - 1
    elif key == ',':
        viewDistance = viewDistance + 1
    glutPostRedisplay()

def specialkey(key,x,y):
    global viewRotX, viewRotY
    if key == GLUT_KEY_LEFT:
        viewRotY = viewRotY + 3
    elif key == GLUT_KEY_RIGHT:
        viewRotY = viewRotY - 3
    elif key == GLUT_KEY_UP:
        viewRotX = viewRotX + 3
    elif key == GLUT_KEY_DOWN:
        viewRotX = viewRotX - 3
    glutPostRedisplay()

glutInit([])
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH)
glutInitWindowSize(400,400)
glutCreateWindow(sys.argv[0])
glutDisplayFunc(draw)
glutKeyboardFunc(keyboard)
glutSpecialFunc(specialkey)

glEnable(GL_DEPTH_TEST)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
gluPerspective(50.0, 1.0, 1.0, 100.0)
glMatrixMode(GL_MODELVIEW)

glutMainLoop()