hi people.
I've started to learn openGL in android, and i've met some problem. i have 3d model in .ASE file, i wrote code witch read all data about mesh vertex, texture vertex and face indeces. I've checked all data which i transmit in buffer and they are the same as in .ASE file ( that means i didn't lose nothing )

here is the screenshot of 3d model in 3d max




here's how it's looks on emulator


after this i tried with simple object, here's screenshot from 3d max and how it's looks on emulator




here's texture i use:


help me please.

There's not a lot to go on here... but at first glance I would ask if you've double checked your texture coordinate settings.

here's .ASE file in .txt format and the output of my texture_vertex_array ( so you can compare texture coordinates ) they are the same ( i think i did it right ).

i don't remembere where, i've read about that the coordinate Y is inversed.
i wrote new method, where i rewrite all texture and vertex coordinate, here it is:

Code: Select all


private void fix_arrays ()
      {
         
         float[] new_vert  = new float [ face_num * 3 * 3 ] ;
         float[] new_tvert = new float [ face_num * 3 * 2 ] ;
         byte [] new_index = new byte  [ face_num * 3 ] ;

         for ( int i = 0 ; i < face_num * 3 ; i ++ )
         {

            new_vert  [ i * 3 ] = vertex_coords [ index_array   [ i ] * 3 ] ;
            new_tvert [ i * 2 ] = texture_data  [ texture_index [ i ] * 2 ] ;
            

            new_vert  [ i * 3 + 1 ] =        vertex_coords [ index_array   [ i ] * 3 + 1 ] ;
            new_tvert [ i * 2 + 1 ] = 1.0f - texture_data  [ texture_index [ i ] * 2 + 1 ] ;

            new_vert  [ i * 3 + 2 ] = vertex_coords [ index_array   [ i ] * 3 + 2 ] ;

            
            new_index[ i ] = ( byte ) i ;
                     
         }
         
         
         vertex_num         = vertex_coords.length ;
         texture_vertex_num = vertex_coords.length ;
         
         vertex_coords = new_vert  ;
         index_array   = new_index ;
         texture_data  = new_tvert ;
      }



i've set my simple box.
and look what i get:

( everything is fine )





________________________________________________________________________

so with simple model everything is ok, but when i've set my robot model, i've got this:





i've got only the part of my model =(

I don't have much time right now to browse through all of the vertex data, but are you sure your "fix" function is not cutting the data short - since you are practically recreating the areas you should be sure that there is not a counting issue, as that would be the easiest problem to notice. You can also try just disabling texture with the current methods to see if the rest of the model is drawn, without textures, otherwise you lost some vertex information somewhere.

damn you're right, this method is cutting my model, but i don't wont to use it, after rewriteing, all my arrays becom bigger by 3 times. that's bad, i need to find some ather method to set my texture.

Why not just modify the Y coordinate at draw time? When I draw in 2D I just subtract the screen's height, obviously it's a different calculation in 3d but the general concept should be the same, no?

i've tried this way, after reading y coord, i've did transformation like this: texture_array [ y ] = 1 - y_coord ;
as resul i had something like in first time, when i saw texture problem ( but it was little bit different ) but still no OK =).

try to flip your texture horizontal or vertical or both. this works for me very well.

greetz

Can you show your part of code where you are reading texture coordinate

i mean flip the texture with an graphic programm. you don't have to change the texture coordinates. its a workaround but it works..

here you can see the uv map:


and here is the texture after flipping.



greetz

sorry a lot dear...these texture and their co-ordinates coding is too above than my mind can understand.............................lols...........
good luck