Hi,

my problem is that for some reason my texture gets twisted from two sides of a cube. I load a cube from .OBJ file and the data seems to be valid. I have tested .OBJ file with another application, wich renders the cube correctly. With both applications I get same result after loading the OBJ-file, but my application doesn't render it correctly. Mysterious part is that only two sides of the cube is rendered incorrectly but four other sides looks ok. I have attached pictures from cube as well.

Work order of loading and setuping the mesh:

1. Get position data and texture position data from OBJ-file

2. Get indices of vertices

3. Setup vertex and index buffers

4. Load and setup texture

Any ideas what might cause this error?

at my case mostly it occur about vertex declarion about buffer and shader ...

of vertex buffer's structure..

and you must use PIX for this kind of problem..

It's in DX sdk

Here is the mesh what I try to load:

# 3ds Max Wavefront OBJ Exporter v0.97b - (c)2007 guruware

# File Created: 16.12.2012 18:16:25

mtllib MyNewRock.mtl

#

# object Box001

#

v -20.6063 0.0000 -0.0150

v -20.6063 0.0000 -9.1689

v -7.4212 0.0000 -9.1689

v -7.4212 0.0000 -0.0150

v -20.6063 10.1923 -0.0150

v -7.4212 10.1923 -0.0150

v -7.4212 10.1923 -9.1689

v -20.6063 10.1923 -9.1689

# 8 vertices

vn 0.0000 -1.0000 -0.0000

vn 0.0000 1.0000 -0.0000

vn 0.0000 0.0000 1.0000

vn 1.0000 0.0000 -0.0000

vn 0.0000 0.0000 -1.0000

vn -1.0000 0.0000 -0.0000

# 6 vertex normals

vt 1.0000 0.0000 0.0000

vt 1.0000 1.0000 0.0000

vt 0.0000 1.0000 0.0000

vt 0.0000 0.0000 0.0000

# 4 texture coords

g Box001

usemtl 01___Default

s 2

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

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

s 4

f 5/4/2 6/1/2 7/2/2

f 7/2/2 8/3/2 5/4/2

s 8

f 1/4/3 4/1/3 6/2/3

f 6/2/3 5/3/3 1/4/3

s 16

f 4/4/4 3/1/4 7/2/4

f 7/2/4 6/3/4 4/4/4

s 32

f 3/4/5 2/1/5 8/2/5

f 8/2/5 7/3/5 3/4/5

s 64

f 2/4/6 1/1/6 5/2/6

f 5/2/6 8/3/6 2/4/6

# 12 faces

And thanks for suggesting PIX debugging tool. I have to look how to use it.

I added a debug photo and it seems that texture coordinates are actually wrong. Some of those coordinates don't match.

Thanks eppo. I noticed the problem. Position data was correct but I loaded wrong tu and tv coordinate so I have to fix my algorithm. I think this will fix my problem.