Re: d3drs_wrap[0-7] ???

[N. Dahn]

Hopefully this isnt the case, and according to this
http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dx8_c/direc...
i have luck for this time i think. :) Comments?

Okay, i think i got one step further: on gamedev.net i found the
suggestion to use glTexParameteri(GL_TEXTURE_2D, TEXTURE_WRAP_U/V/W,
wrapParm). Besides, could this also be an 3D Texture? I think I worked
it out and im going to try it out now, but theres one thing bothering
me: as mentioned earlier in d3d there exists the d3dwrapcoord_3 flag
which wraps textures through the 4th dimension (that should be time).
However, i was unable to find _anything_ going into that direction in
opengl so i stubbed it out for now. Does anybody know how to proceed
with this?

BTW, is there a way to figure out what an undocumented function does?
(namely d3drs 172 and 173)

Cheers
Nikolas

d3drs_wrap[0-7] ???

[Raphael]

On Thursday 21 October 2004 21:43, N. Dahn wrote:
> Hopefully this isnt the case, and according to this
> http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dx8_c/dire
> ctx_cpp/graphics_using_9bn7.asp i have luck for this time i think. :)
> Comments?

Well it seems only an activation flag, so no specific code
So, i this it should a code like that:

case D3DRS_WRAP0:
  TRACE("Wrap Activation Flag for TextureStage 0 to %04x (QRST)\n", (DWORD) Value);	
  break;

and in TSS wraping mngt (IDirect3DDevice8Impl_SetTextureStageState):

switch (Type) {
case D3DTSS_ADDRESSU:
  if (D3DTADDRESS_WRAP != Value || (This->UpdateStateBlock->renderstate[D3DRS_WRAP0 + Stage] & D3DWRAPCOORD_0)) {
    TRACE("Setting WRAP_S to %d for %x\n", wrapParm, This->StateBlock->textureDimensions[Stage]); glTexParameteri(This->StateBlock->textureDimensions[Stage], GL_TEXTURE_WRAP_S, wrapParm);
    checkGLcall("glTexParameteri(..., GL_TEXTURE_WRAP_S, wrapParm)");
  }
  break;
case D3DTSS_ADDRESSV:
  if (D3DTADDRESS_WRAP != Value || (This->UpdateStateBlock->renderstate[D3DRS_WRAP0 + Stage] & D3DWRAPCOORD_1)) {
    TRACE("Setting WRAP_T to %d for %x\n", wrapParm, This->StateBlock->textureDimensions[Stage]);
    glTexParameteri(This->StateBlock->textureDimensions[Stage], GL_TEXTURE_WRAP_T, wrapParm);
    checkGLcall("glTexParameteri(..., GL_TEXTURE_WRAP_T, wrapParm)");
  }
  break;
case D3DTSS_ADDRESSW:
  if (D3DTADDRESS_WRAP != Value || (This->UpdateStateBlock->renderstate[D3DRS_WRAP0 + Stage] & D3DWRAPCOORD_2)) {
    TRACE("Setting WRAP_R to %d for %x\n", wrapParm, This->StateBlock->textureDimensions[Stage]);
    glTexParameteri(This->StateBlock->textureDimensions[Stage], GL_TEXTURE_WRAP_R, wrapParm);
    checkGLcall("glTexParameteri(..., GL_TEXTURE_WRAP_R, wrapParm)");
  }
  break;
default: /* nop */
  break; /** stupic compilator */
}

But i don't know if its valid to call SetTextureStageState(...D3DTADDRESS_WRAP) before SetRenderState(...D3DWRAP_U...) (you should test) 
If you look at http://if.dynsite.net/t-pot/program/28_bump/bg_cpp_ps.html
they do it
> Okay, i think i got one step further: on gamedev.net i found the
> suggestion to use glTexParameteri(GL_TEXTURE_2D, TEXTURE_WRAP_U/V/W,
> wrapParm). Besides, could this also be an 3D Texture?

Yes: 3 param U/V/W
> I think I worked it out and im going to try it out now, but theres one thing 
> bothering me: 
> as mentioned earlier in d3d there exists the d3dwrapcoord_3 flag 
> which wraps textures through the 4th dimension (that should be time).
> However, i was unable to find _anything_ going into that direction in
> opengl so i stubbed it out for now. Does anybody know how to proceed
> with this?

I think its used for cube texture (need face selection)
but don't worry for now
> BTW, is there a way to figure out what an undocumented function does?
> (namely d3drs 172 and 173)

They seems deprecated since DX8.1 (maybe never implemented)
D3DRS_POSITIONORDER             = 172,
D3DRS_NORMALORDER               = 173,
> Cheers
> Nikolas

Regards,
Raphael

d3drs_wrap[0-7] ???

[N. Dahn]

> Well it seems only an activation flag, so no specific code
> So, i this it should a code like that:
>
> case D3DRS_WRAP0:
>   TRACE("Wrap Activation Flag for TextureStage 0 to %04x (QRST)\n", (DWORD) Value);	
>   break;
>
> and in TSS wraping mngt (IDirect3DDevice8Impl_SetTextureStageState):
>
> switch (Type) {
> case D3DTSS_ADDRESSU:
>   if (D3DTADDRESS_WRAP != Value || (This->UpdateStateBlock->renderstate[D3DRS_WRAP0 + Stage] & D3DWRAPCOORD_0)) {
>     TRACE("Setting WRAP_S to %d for %x\n", wrapParm, This->StateBlock->textureDimensions[Stage]); 
>     glTexParameteri(This->StateBlock->textureDimensions[Stage], GL_TEXTURE_WRAP_S, wrapParm);
>     checkGLcall("glTexParameteri(..., GL_TEXTURE_WRAP_S, wrapParm)");
>   }
>   break;
> case D3DTSS_ADDRESSV:
>   if (D3DTADDRESS_WRAP != Value || (This->UpdateStateBlock->renderstate[D3DRS_WRAP0 + Stage] & D3DWRAPCOORD_1)) {
>     TRACE("Setting WRAP_T to %d for %x\n", wrapParm, This->StateBlock->textureDimensions[Stage]);
>     glTexParameteri(This->StateBlock->textureDimensions[Stage], GL_TEXTURE_WRAP_T, wrapParm);
>     checkGLcall("glTexParameteri(..., GL_TEXTURE_WRAP_T, wrapParm)");
>   }
>   break;
> case D3DTSS_ADDRESSW:
>   if (D3DTADDRESS_WRAP != Value || (This->UpdateStateBlock->renderstate[D3DRS_WRAP0 + Stage] & D3DWRAPCOORD_2)) {
>     TRACE("Setting WRAP_R to %d for %x\n", wrapParm, This->StateBlock->textureDimensions[Stage]);
>     glTexParameteri(This->StateBlock->textureDimensions[Stage], GL_TEXTURE_WRAP_R, wrapParm);
>     checkGLcall("glTexParameteri(..., GL_TEXTURE_WRAP_R, wrapParm)");
>   }
>   break;
> default: /* nop */
>   break; /** stupic compilator */
> }
>
> But i don't know if its valid to call SetTextureStageState(...D3DTADDRESS_WRAP) before SetRenderState(...D3DWRAP_U...) (you should test) 
> If you look at http://if.dynsite.net/t-pot/program/28_bump/bg_cpp_ps.html
> they do it

Well... im really a noob (learning c since 3 days i think oO ) could you
please explain your code? Im not getting totally through it...
> case D3DRS_WRAP0:
>   TRACE("Wrap Activation Flag for TextureStage 0 to %04x (QRST)\n", (DWORD) Value);	
>   break;

I dont understand what this is good for... and ive no idea what is done
in the different d3dtss calls... i really do what i can, but i think i
lack experience...
> > Okay, i think i got one step further: on gamedev.net i found the
> > suggestion to use glTexParameteri(GL_TEXTURE_2D, TEXTURE_WRAP_U/V/W,
> > wrapParm). Besides, could this also be an 3D Texture?
>
> Yes: 3 param U/V/W

*Dou* my fault...
> > I think I worked it out and im going to try it out now, but theres one thing 
> > bothering me: 
> > as mentioned earlier in d3d there exists the d3dwrapcoord_3 flag 
> > which wraps textures through the 4th dimension (that should be time).
> > However, i was unable to find _anything_ going into that direction in
> > opengl so i stubbed it out for now. Does anybody know how to proceed
> > with this?
>
> I think its used for cube texture (need face selection)
> but don't worry for now

Alright.
> They seems deprecated since DX8.1 (maybe never implemented)
> D3DRS_POSITIONORDER             = 172,
> D3DRS_NORMALORDER               = 173,

Okay, they dont seem to break anything and i guess its quite painfull to
figure out what they do, so ill leave them for now.

Regards,
Nikolas

d3drs_wrap[0-7] ???

[David Welch]

On Thu, Oct 21, 2004 at 09:43:34PM +0200, N. Dahn wrote:
> Hopefully this isnt the case, and according to this
> http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dx8_c/direc...
> i have luck for this time i think. :) Comments?
>
> Okay, i think i got one step further: on gamedev.net i found the
> suggestion to use glTexParameteri(GL_TEXTURE_2D, TEXTURE_WRAP_U/V/W,
> wrapParm). Besides, could this also be an 3D Texture? I think I worked
> it out and im going to try it out now, but theres one thing bothering
> me: as mentioned earlier in d3d there exists the d3dwrapcoord_3 flag
> which wraps textures through the 4th dimension (that should be time).
> However, i was unable to find _anything_ going into that direction in
> opengl so i stubbed it out for now. Does anybody know how to proceed
> with this?

What you're suggesting won't work. Texture addressing 
(D3DTSS_ADDRESS[U,V,S]) and texture coordinate wrapping (D3DRS_WRAP[0-7]) 
apply at different stages in the 3d pipeline and have different effects.

Texture addressing affects what happens when a texture lookup
is done with coordinates outside the range 0 to 1 - D3DTADDRESS_REPEAT
ignores the integer part of the coordinate, D3DTADDRESS_CLAMP samples
on the edge of the texture, etc.

Texture coordinate wrapping affects interpolation of texture coordinates
across a triangle. When wrapping is enabled for a component of a texture
coordinate set then interpolation takes the shortest route across the
triangle (considering 0 to be next to 1). So if we have a triangle with
one vertex with texture coordinate (0.7, 0) and another vertex with
texture coordinate (0.1, 0) and wrapping is enabled then pixels between
the two vertices will get coordinates starting at (0.7, 0) and going up to 
(1, 0) then from (0, 0) up to (0.1, 0). With wrapping disabled the 
coordinates will start at 0.7 and go down to 0.1.