2 replies to this topic

[artificial]

Hi!

I have a problem that might seem noobish to you. Unfortunately, I couldn't solve it myself, so I'm in need of your help.

I'm programming a 3D game at the moment and I'm tired of creating models manually by typing in the vector-coordinates.
Instead, I'd like to create the models in Blender for they can be more complex.
Now I don't know which given format I should use. I actually just need the vector-coordinates (arranged like triangles), the normal-vectors and the texture-coordinates.

So, which format would you suggest?

I tried some, but still I wonder about a few things.
For example, this is Blender's standard cube exported as a Wavefront-file (.obj):

# Blender3D v246 OBJ File: 

# www.blender3d.org

mtllib Cube.mtl

o Cube

v 1.000000 -1.000000 -1.000000

v 1.000000 -1.000000 1.000000

v -1.000000 -1.000000 1.000000

v -1.000000 -1.000000 -1.000000

v 1.000000 1.000000 -1.000000

v 0.999999 1.000000 1.000001

v -1.000000 1.000000 1.000000

v -1.000000 1.000000 -1.000000

vn 0.000000 0.000000 -1.000000

vn -1.000000 -0.000000 -0.000000

vn -0.000000 -0.000000 1.000000

vn -0.000001 0.000000 1.000000

vn 1.000000 -0.000000 0.000000

vn 1.000000 0.000000 0.000001

vn 0.000000 1.000000 -0.000000

vn -0.000000 -1.000000 0.000000

usemtl Material

s off

f 5//1 1//1 8//1

f 1//1 4//1 8//1

f 3//2 7//2 8//2

f 3//2 8//2 4//2

f 2//3 6//3 3//3

f 6//4 7//4 3//4

f 1//5 5//5 2//5

f 5//6 6//6 2//6

f 5//7 8//7 7//7

f 5//7 7//7 6//7

f 1//8 2//8 3//8

f 1//8 3//8 4//8

Why are there eight instead of twelve vertices? Is the last part supposed to tell the engine how to draw the model?

Greets,
artificial

[Alexander]

I am not a Blender guru but I had found the .obj specification that will most likely be of interest to you:
http://www.martinred...gfx/3d/OBJ.spec

As for the selection of formats, unless working with Direct X then OBJ files seem the best way to go. Depends if your game engine supports it.

[artificial]

@Nullw0rm: Thanks for that link. :)

If anyone else has a possible solution, feel free to post it.

EDIT: Is there any model format that you can recommend for my undertaking?

EDIT2: The PLY file format looks decent.

Edited by artificial, 16 October 2010 - 10:11 AM.
EDIT2