CODEWITHSUNDEEP
pythonopenglpygamepyopengl
user14187680
user14187680

Reputation:

Drawing a cube with Pygame and OpenGL in Python environment

I got this code to draw an OpenGL cube in a pygame window with python but every time i try to compile it says this line 34, in Cube glVertex3f(vertices[vertex]) TypeError: tuple indices must be integers or slices, not tuple Anyone who knows how to correct code so that i can make the program achieve its intended function.

import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *
##Define the vertices. usually a cube contains 8 vertices
vertices=( (1, -1, -1),
    (1, 1, -1),
    (-1, 1, -1),
    (-1, -1, -1),
    (1, -1, 1),
    (1, 1, 1),
    (-1, -1, 1),
    (-1, 1, 1))
##define 12 edges for the body
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)
    )
##define function to draw the cube
def Cube():
    glBegin(GL_LINES)
    for edge in edges:
        for vertex in vertices:
            glVertex3f(vertices[vertex])
    glEnd
##Define main function to draw a window for the openGL
def main():
    pygame.init()
    display=(600,600)
    pygame.display.set_mode(display, DOUBLEBUF | OPENGL)
    gluPerspective(45, (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()

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


main()

What could i be doing wrong please help..

Upvotes: 3

Views: 4055

Answers (2)

Rabbid76
Rabbid76

Reputation: 210909

vertex is a 3-component tuple, so it cannot be used for subscriptions. glVertex3f expects 3 arguments. Therefore you either have to unzip the tuple or use the OpenGL instruction glVertex3fv instead of glVertex3f (see glVertex):

glVertex3f(vertices[vertex])

glVertex3fv(vertex)

or

glVertex3f(*vertex)

Furthermore, the parentheses after glEnd are missing:

glEnd

glEnd()

But if you want to draw a wireframe cube, you need to draw line segments for each edge of the cube:

def Cube():
    glBegin(GL_LINES)
    for edge in edges:
        for index in edge:
            glVertex3fv(vertices[index])
    glEnd()

Upvotes: 2

incarnadine
incarnadine

Reputation: 700

The problem is well explained in your error message. You are trying to index a list with tuples vertices[(1, -1, -1)] which obviously won't work.

Assuming you are trying to call glVertex3f on each tuple, replace the specified line with glVertex3f(vertex), which will cause it to run on each tuple in your vertices list.

Upvotes: 1

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