https://gist.github.com/1435032

// via profiler, discovered that Convert.ToSingle and Convert.ToInt32
// are very slow… so using float.Parse and int.Parse instead!
//
// memory usage during obj loading went down from 56 MB to 6.8 MB (8.2x improvement)
// and load time went down 1742ms to 514ms (3.4x improvement)

/*
private float cf(string v) {
return Convert.ToSingle(v.Trim(), new CultureInfo(“en-US”));
}

private int ci(string v) {
return Convert.ToInt32(v.Trim(), new CultureInfo(“en-US”));
}
*/

private float cf(string v) {
return float.Parse(v);
}

private int ci(string v) {
return int.Parse(v);
}

when i simply run your package on my system in unity, the red monkey appears… i downloaded the obj money from this link:

http://www.everyday3d.com/unity3d/obj/monkey.obj

and uploaded on my hosting, here -
http://www.cookasite.com/14j/obj-for-ubity/monkey.obj

i changed the path in the script…so now an error comes -

KeyNotFoundException: The given key was not present in the dictionary.

Why so ?? please help

http://jon-martin.com/?cat=13

it may or not solve this problem, not sure about the webside of the loading yet as it has been untested for that scenario but it terms of referencing materials libs etc it should handle much better.

Thanks again Bartok, I would be interested in your feedback on my extensions so far, currently working on project save with reflection, having a few problems identifying if a GO is a prefab at runtime.

The result hangs on this error:

KeyNotFoundException: The given key was not present in the dictionary.
System.Collections.Generic.Dictionary`2[System.String,UnityEngine.Material].get_Item (System.String key)
GeometryBuffer.PopulateMeshes (UnityEngine.GameObject[] gs, System.Collections.Generic.Dictionary`2 mats) (at Assets/OBJ/src/GeometryBuffer.cs:197)
OBJ.Build () (at Assets/OBJ/src/OBJ.cs:302)
OBJ+c__Iterator0.MoveNext () (at Assets/OBJ/src/OBJ.cs:93)

Any help would be greatly appreciated! Thanks!

anyway…quick tip for me to get this working…

The server MIME type has to set for .obj / .mtl..
after I did that..it worked..mat files a little wacked, but thats cake…

kongregate game site has a 20 mb initial size limit.
this really helps for us poor new developers!!!

THANX!!!!!!

Firstly thankyou for such a wonderful kick start to a problem I am currently addressing, many choices available but yours was for the right platform (Unity3d) so I thought I could build upon the hard work you had already undertaken so far, I hope some of this is a help and not a hinderance and believe me I am greatfull for the headstart, excellent work.

I found certain issues with diffently sourced OBJ files, from max, sketch-up and turbosquid etc, so these ammendments helped deal with issues surrounding the OBJ spec. So I thought it only right to share and report back with fixes that I had made:-

Here is a link to my changes:
OBJ.cs at http://pastebin.com/yqQjyHUg
GeometryBuffer.cs at http://pastebin.com/YPSYPi73

A list of alterations:-
ALTERATION 0:- Cater for Local Files also.
ALTERATION 1:- Major Problems with different OBJ file format whitespace.
ALTERATION 2:- Rough Fix to deal with quads and polys there may be better methods but seems to work, even with textures so far.
ALTERATION 3:- I found an OBJ on turbosquid with no material library reference so Updated GeometryBuffer PushGroup() adding g.materialName = “default”.
ALTERATION 4:- Lets say the user moved the material library elsewhere, I created error handling and ReturnMaterialNames()function in GeometryBuffer.cs to create default materials with correct usemtl names
ALTERATION 5:- Added Recalculate normals for OBJ file without normals.
ALTERATION 6:- Added to name materials correctly
ALTERATION 7:- Added CalculateTangents Function to cater for bumpmaps on the mesh etc. Will be usefull at a later stage (still resolving materials import section on this One at present)

This works great on UnityV3 Pro but should still work (if it previously worked) fine on indie, don’t think I added anything to irregular.

I also do realise that according to your site this script might is released under MIT, so wondered if I could mail you about the GPL project I am currently working on and talk about it’s inclusion, this is a not for profit application an will serves as a GPL Educational Application with open source libraries i.e. (unity project code).

Hope this helps, Jon Martin

the obj file is like this :

# 3ds Max Wavefront OBJ Exporter v0.97b – (c)2007 guruware
# File Created: 28.12.2010 14:45:53

mtllib testobj.mtl

#
# object Box001
#

v -2.562998 -4.306799 0.000000
v -2.562998 4.306799 0.000000
v 2.562998 4.306799 0.000000
v 2.562998 -4.306799 0.000000
v -2.562998 -4.306799 5.110198
v 2.562998 -4.306799 5.110198
v 2.562998 4.306799 5.110198
v -2.562998 4.306799 5.110198
# 8 vertices

vn 0.000000 0.000000 -1.000000
vn 0.000000 0.000000 1.000000
vn 0.000000 -1.000000 0.000000
vn 1.000000 0.000000 0.000000
vn 0.000000 1.000000 0.000000
vn -1.000000 0.000000 0.000000
# 6 vertex normals

vt 1.000000 0.000000 0.000000
vt 1.000000 1.000000 0.000000
vt 0.000000 1.000000 0.000000
vt 0.000000 0.000000 0.000000
# 4 texture coords

g Box001
usemtl wire_088177026
s 2
f 1/1/1 2/2/1 3/3/1 4/4/1
s 4
f 5/4/2 6/1/2 7/2/2 8/3/2
s 8
f 1/4/3 4/1/3 6/2/3 5/3/3
s 16
f 4/4/4 3/1/4 7/2/4 6/3/4
s 32
f 3/4/5 2/1/5 8/2/5 7/3/5
s 64
f 2/4/6 1/1/6 5/2/6 8/3/6
# 6 polygon

don’t know what is wrong help

Assets/OBJ/src/OBJ.cs(7,14): error CS0509: `OBJ’: cannot derive from sealed type `UnityEngine.GameObject’

please guide me in steps as what should i do as a lehman.

Assets/OBJ/src/OBJ.cs(7,14): error CS0509: `OBJ’: cannot derive from sealed type `UnityEngine.GameObject’

Any ideas where i am going wrong ?

Regards,

Ashok Srinivasan

Cheers,
Giancarlo

I’m having some troubles to be honest.

Thansk.

bartek sorry to bother you, but in the OBJ.cs at line 246 this is the line:
ms[0] = obj.gameObject;

but OBJ is already a GameObject, is gameObject (small g) a member of GameObject?

Best,
Giancarlo