WMO/M2 Texturing

[DrGonzo]

Reposting due to forum rollback.
Does anyone have any info/tips with setting textures for objects? Currently just using the first texture for each object. Tried using each respective list but they seem to use numbers out of range.


Gotta get multitexturing/alpha blending set up to finish terrain

[Jadd]

I can't help you, sorry...

But I will say, good work with what you're making, it looks incredible :P

[MaiN]

Reposting due to forum rollback.
Does anyone have any info/tips with setting textures for objects? Currently just using the first texture for each object. Tried using each respective list but they seem to use numbers out of range.


Gotta get multitexturing/alpha blending set up to finish terrain

You're sure you're parsing the MOTX and MOMT (for WMO) correctly?
WMO - WoW.Dev Wiki

Anyways, can't really help you more without knowing more information.
Schlumpf can probably help a bit more than me also :P

[DrGonzo]

M2 Example:

//--------------------------
//Parsing main m2 file
for(int x=1;x<Model.header.nTextures+1;x++)
	{
		TextureDef buf;
		ReadFile(file, &buf, 16, &read, 0);
		SetFilePointer(file, buf.ofsFilename, 0, 0);
		ReadFile(file, &buf3, buf.lenFilename, &read, 0);
		buf2 = buf3;
		Model.TextureNames.push_back(buf2);
		SetFilePointer(file, Model.header.ofsTextures+(x*16), 0, 0);
	}
//----------------------------
//Read texture unit in .skin file
SetFilePointer(file, skin_header.ofsTextureUnits, 0, 0);
	TexUnit buf;
	for(int x=0;x<skin_header.nTextureUnits;x++)
	{
		if(!ReadFile(file, &buf,sizeof(TexUnit), &read, 0))//24
			return false;
		TexUnits.push_back(buf);
	}
//----------------------------
//Set textures inside function that adds object to d3d part
//I'm thinking this is where the trouble comes in
for(int x=0;x<MPQ.Models.size();x++)
	{
		for (int y=0;y<MPQ.Models[x].TexUnits.size();y++)
		{
			MPQ.Models[x].obj[MPQ.Models[x].TexUnits[y].SubmeshIndex1].texture = MPQ.Models[x].TexUnits[y].Texture;
			//MPQ.Models[x].obj[MPQ.Models[x].TexUnits[y].SubmeshIndex2].texture = MPQ.Models[x].TexUnits[y].Texture;
		}

Hopefully something obvious I'm missing.
Also, does anyone have any experience with directx for single pass multitexturing? I've found conflicting tutorials on whats possible. Trying to do:
Stage 0: Base texture
Stage 1: first alpha
Stage 2: second texture
Stage 3: second alpha
Stage 4: third texture
Stage 5: third alpha
Stage 6: fourth texture

else if (Objs[x].subs[z].textured && Objs[x].subs[z].gTexture.size() > 1) // if textured and more than 1 texture
		{
			for (int o=0;o<Objs[x].subs[z].gTexture.size() && o<7;o++) 
				g_pD3DDevice->SetTexture(o, Objs[x].subs[z].gTexture[o]); //loop and set all textures

			
			g_pD3DDevice->SetTextureStageState( 0, D3DTSS_TEXCOORDINDEX, D3DTSS_TCI_PASSTHRU );
			g_pD3DDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1);// set base texture
			g_pD3DDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE); //  to first stage
			g_pD3DDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1); // pull alpha from
			g_pD3DDevice->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);  // texture

			g_pD3DDevice->SetTextureStageState( 1, D3DTSS_TEXCOORDINDEX, D3DTSS_TCI_PASSTHRU );
			g_pD3DDevice->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_SELECTARG1); // pull color from
			g_pD3DDevice->SetTextureStageState(1, D3DTSS_COLORARG1, D3DTA_CURRENT); //  current
			g_pD3DDevice->SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1); // pull alpha from
			g_pD3DDevice->SetTextureStageState(1, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);  // texture

			g_pD3DDevice->SetTextureStageState( 2, D3DTSS_TEXCOORDINDEX, D3DTSS_TCI_PASSTHRU );
			g_pD3DDevice->SetTextureStageState(2, D3DTSS_COLOROP, D3DTOP_BLENDCURRENTALPHA);//D3DTOP_BLENDTEXTUREALPHA); // pull color from
			g_pD3DDevice->SetTextureStageState(2, D3DTSS_COLORARG1, D3DTA_TEXTURE); //alpha blend
			g_pD3DDevice->SetTextureStageState(2, D3DTSS_COLORARG2, D3DTA_CURRENT); //  current
			g_pD3DDevice->SetTextureStageState(2, D3DTSS_ALPHAOP, D3DTOP_DISABLE); //D3DTOP_SELECTARG1); // pull alpha from
			g_pD3DDevice->SetTextureStageState(2, D3DTSS_ALPHAARG1, D3DTA_CURRENT);  // current

			g_pD3DDevice->SetTextureStageState(3, D3DTSS_COLOROP, D3DTOP_SELECTARG1); // pull color from
			g_pD3DDevice->SetTextureStageState(3, D3DTSS_COLORARG1, D3DTA_CURRENT); //  current
			g_pD3DDevice->SetTextureStageState(3, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1); // pull alpha from
			g_pD3DDevice->SetTextureStageState(3, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);  // texture

			g_pD3DDevice->SetTextureStageState(4, D3DTSS_COLOROP, D3DTOP_BLENDCURRENTALPHA); // pull color from
			g_pD3DDevice->SetTextureStageState(4, D3DTSS_COLORARG1, D3DTA_TEXTURE);
			g_pD3DDevice->SetTextureStageState(4, D3DTSS_COLORARG2, D3DTA_CURRENT); //  current
			g_pD3DDevice->SetTextureStageState(4, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1); // pull alpha from
			g_pD3DDevice->SetTextureStageState(4, D3DTSS_ALPHAARG1, D3DTA_CURRENT);  // texture

			g_pD3DDevice->SetTextureStageState(5, D3DTSS_COLOROP, D3DTOP_SELECTARG1); // pull color from
			g_pD3DDevice->SetTextureStageState(5, D3DTSS_COLORARG1, D3DTA_CURRENT); //  current
			g_pD3DDevice->SetTextureStageState(5, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1); // pull alpha from
			g_pD3DDevice->SetTextureStageState(5, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);  // texture

			g_pD3DDevice->SetTextureStageState(6, D3DTSS_COLOROP, D3DTOP_BLENDCURRENTALPHA); // pull color from
			g_pD3DDevice->SetTextureStageState(6, D3DTSS_COLORARG1, D3DTA_TEXTURE);
			g_pD3DDevice->SetTextureStageState(6, D3DTSS_COLORARG2, D3DTA_CURRENT); //  current
			g_pD3DDevice->SetTextureStageState(6, D3DTSS_ALPHAOP, D3DTOP_SELECTARG1); // pull alpha from
			g_pD3DDevice->SetTextureStageState(6, D3DTSS_ALPHAARG1, D3DTA_CURRENT);  // texture

Sorry some of the comments are off because I c/p'd, but it should still be easy enough to follow. When using all the textures in 1 stage it ignores the base texture, and then just alpha blends the alpha texture so that the ground is transparent.

[MaiN]

I have not really puzzled so much with textures (and I suck in C++) but

for(int x=0;x<Model.header.nTextures;x++)
	{
                SetFilePointer(file, Model.header.ofsTextures+(x*16), 0, 0);
		TextureDef buf;
		ReadFile(file, &buf, 16, &read, 0);
                if (buf.type == 0) // only do this if it's hardcoded (I think?)
                {
		       SetFilePointer(file, buf.ofsFilename, 0, 0);
		       ReadFile(file, &buf3, buf.lenFilename, &read, 0);
		       buf2 = buf3;
		       Model.TextureNames.push_back(buf2);
                }
	}

You have to do some other thing if it's not hardcoded.
M2/WotLK - WoW.Dev Wiki

[suicidity]

Can you generate your own texture in memory, then set that as your texture; Instead of doing a butt-load of stages?

Just when you're done with it, kill the texture and Release it.

[DrGonzo]

Got any reference material for that? I've switched over to a multi pass approach, still no luck.

[suicidity]

Not right now; Unfortanately, I just reformatted.

[DrGonzo]

Missed the Texture lookup table in the m2's. Fixed the texture ref's in the WMOs. Everything looks correct except the trees, the trunks are textured with the leaves.

Still having an issue with the terrain not blending correctly, I'm screwing something up somewhere. Guess it's time to start learning about vertex/pixel shaders instead of using fixed pipeline

[DrGonzo]

Finally got some blending to work. Converted the 4bit alpha to 8bit.

char alpha_buf[4096];
					int buf_counter = 0;
					for(int s=0;s<2048;s++)
					{
						unsigned char alpha = MPQ.MapChunks[y*16+x].Alpha[MPQ.MapChunks[y*16+x].TextureLayer[o].offsAlpha+s];
						float temp = float((alpha&240)>>4);
						temp/=15;
						temp*=255;
						alpha_buf[s*2] = unsigned char(temp);
						temp = float(alpha&15);
						temp/=15;
						temp*=255;
						alpha_buf[s*2+1] = unsigned char(temp);
					}
					filename = GenerateAlphaTGA(alpha_buf);

I'm guessing wow does some general blending/cleanup (shadowmap, lightmap, etc). Any tips appreciated.

[Xeranor]

wow looks w
awesome but why is the water missing

[DrGonzo]

Haven't got around to it yet. I was having it set the ground to water height with blue vertices but that just made stuff appear flat and ugly.

[DrGonzo]

Ok. Hopefully someone has some advice with the alpha stuff. Maybe someone knows someone who knows something? Moving onto a different aspect until I get an idea to try.

[suicidity]

Have you looked at tools that render WoW externally?

[lanman92]

Are there any public libraries that render .mdx/.m2 models? Terrain? WMO?