#demo_glut_3d_teapot_rotate_42_ok.py
import sys
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *


def display():
    #glEnable( GL_LIGHTING )#need tuning
    #glEnable( GL_LIGHT0 )#need tuning
    #glEnable( GL_DEPTH_TEST )#need tuning
    glEnable(GL_BLEND)
    glColor3f ( 0.10, 0.3, 0.60 ) 

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT )
    #glClear(GL_COLOR_BUFFER_BIT)
    #glPushMatrix()
    #gluLookAt( 0,2.5,-7, 0,0,0, 0,1,0 )$cuase problem

    #gluLookAt(0.0,0.0,5.0,  0.0,0.0,0.0,  0.0,1.0,0.0);

    #glRotatef(0.01, 1, 0, 0)
    glRotatef(0.01, 1, 1, 0)#change color for solid teapot
    glutSolidTeapot( 0.5 )
	
    glColor3f ( 0.5, 0.5, 0.70 ) #change color for wireframe
    glutWireTeapot(0.5)
    #glPopMatrix()
    glFlush()

def reshape(w,h):
    glViewport( 0, 0, w, h )
    glMatrixMode( GL_PROJECTION )
    glLoadIdentity()
    gluPerspective( 45.0, 1.0*w/h, 0.1, 100.0 )
    #gluPerspective( 45.0, 1.0*w/h, 0.1, 13.0 )

    #gluPerspective(70, 1*w/h,0.1, 50);

	#https://stackoverflow.com/questions/16571981/gluperspective-parameters-what-do-they-mean

    glMatrixMode( GL_MODELVIEW )
    glLoadIdentity()

def keyboard(key,x,y):
    if key==chr(27): sys.exit(0)

glutInit( sys.argv )
glutInit()

glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA)
glutInitDisplayMode( GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH )
glutInitWindowSize( 500, 400)
glutCreateWindow( b'teapot' )
#glutReshapeFunc( reshape ) #this cause the problem
glutKeyboardFunc( keyboard )
glutDisplayFunc( display )
glutIdleFunc( display )
glutMainLoop()