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Lighting with textured models

 
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Ratty



Joined: 18 Sep 2005
Posts: 18
PostPosted: Fri Oct 07, 2005 10:00 am    Post subject: Lighting with textured models Reply with quote
Hi, i've added lights to my scene which render perfectly when my meshes don't have a texture, but added textures causes the entire scene to have full brightness, no shading at all. The code below is what i use to apply my textures, is there something wrong with it?

Code:

   sceGuTexMode(GU_PSM_8888, 0, 0, GU_TRUE);
   sceGuTexFunc(GU_TFX_REPLACE, GU_TCC_RGBA);
   sceGuTexFilter(GU_LINEAR, GU_LINEAR);
   sceGuTexWrap(GU_REPEAT, GU_REPEAT);
   sceGuTexScale(1.0f, 1.0f);
   sceGuBlendFunc(GU_ADD, GU_SRC_ALPHA, GU_ONE_MINUS_SRC_ALPHA, 0, 0);
 
 
/////////
 
 
   sceGumDrawArray(
         GU_TRIANGLES,
         GU_NORMAL_32BITF|GU_TEXTURE_32BITF|GU_COLOR_8888|GU_VERTEX_32BITF|GU_TRANSFORM_3D,
         3* itObject->faceCount,
         0,
         itObject->mesh
      );
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Conflict



Joined: 11 May 2005
Posts: 8
Location: UK, York
PostPosted: Fri Oct 07, 2005 10:14 am    Post subject: Reply with quote
This soundssimiliar to a Opengl T&L issue, you have to setup the pipeline states appropriately.

looking at the sdk document you need to set the state up during init...
using

Code:

sceGuTexFunc(GU_TFX_MODULATE,GU_TCC_RGB);


I see you'er using GU_TFX_REPLACE which simply replaces any shading with the texture, causing it to be fullbright per se... irc..

i think that should sort your issue.

/lee
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Ratty



Joined: 18 Sep 2005
Posts: 18
PostPosted: Fri Oct 07, 2005 10:18 am    Post subject: Reply with quote
Using that seems to make everything disappear.
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Conflict



Joined: 11 May 2005
Posts: 8
Location: UK, York
PostPosted: Fri Oct 07, 2005 12:52 pm    Post subject: Reply with quote
hmm
try, changing GU_ADD in your blendfunc def... to something else, testing here with GU_MIN give best results

Code:

sceGuBlendFunc(GU_MIN, GU_SRC_ALPHA, GU_ONE_MINUS_SRC_ALPHA, 0, 0);


/lee
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Ratty



Joined: 18 Sep 2005
Posts: 18
PostPosted: Fri Oct 07, 2005 12:56 pm    Post subject: Reply with quote
Disabling blending draws everything nicely, i tried with GU_MIN and the colours are weird in places. But i'll mess with it until i get something i like.

Thanks for your help
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