Can you create a TextureMap in code?

Sighman

I am trying to create a TextureMap shader in code, I can create the shader easily enough but the 'TMap' parameter is NULL by default. I've searched all the headers and there are no methods that I can find to create a IShTextureMap, at least not directly. Maybe there is another way to do it that I missed.

Any help would be appreciated.

Eric Winemiller

Use gShell3DUtilities->CreateTextureMapShader for building your shader

  MapParams inMapParams;
  inMapParams.fBrightness = 1;
  inMapParams.fFlipHoriz = false;
  inMapParams.fFlipVert = true;
  inMapParams.fNinetyDegreeCount = 0;

  gShell3DUtilities->CreateTextureMapShader(texture, inMapParams, &colorShader;);
  gShell3DUtilities->CreateMultiChannelShader(
      colorShader, highlightShader, shininessShader, bumpShader, reflectionShader,
      transparencyShader, NULL, NULL, &multiShader;);

 gShell3DUtilities->CreateMasterShader(multiShader, scene, &masterShader;);
 masterShader->SetName(name);
 instance->SetShader (masterShader);

and how to build the actual texture

void DEM::TextureFromBuffers(
  TMCArray& r,  TMCArray& g, TMCArray& b)
{
 TMCCountedPtr channel;
 IShChannelTileIterator* channeliter = NULL;
 const TChannelDataBucket *bucket;
 TMCRect bounds, chunk;
 int32 x, y, height, width,chunkx,chunky, CHUNK_SIZE, sizeH, sizeV;

 MapParams mapparams;
 mapparams.fFlipVert = true;
 mapparams.fFlipHoriz = false;
 mapparams.fBrightness = 1;
 mapparams.fNinetyDegreeCount = 0;
 
 int32 ColorBinIndex;

 gComponentUtilities->CoCreateInstance(CLSID_TextureMap, NULL, MC_CLSCTX_INPROC_SERVER, IID_IShTextureMap, (void**) &texture;);
 gShell3DUtilities->CreateChannel(&channel;, maxX , maxY, 32);
 TChannelID newChannelID(TChannelID::eARGB_CHANNEL, 1);
 channel->SetID(newChannelID);
 channel->FillWithOnes();
 TextureMappingInfo tminfo;
 texture->GetTextureMappingInfo(tminfo);
 channel->GetBounds(bounds);
 sizeH = bounds.GetWidth();
 sizeV = bounds.GetHeight();
 texture->SetInternalMode(true);
 tminfo.fIsInternal = true;
 tminfo.fFlip[0] = true;
 tminfo.fFlip[1] = false;
 texture->SetTextureMappingInfo(tminfo); //use the iter to fill the channel
 channel->GetChannelTileIterator(&channeliter;, bounds);
 channeliter->First();
 channeliter->GetTile(&bucket;, eTileRead);
 CHUNK_SIZE = bucket->Width();
 channeliter->UnGetTile(&bucket;,true);
 channeliter->Release();

 for (chunkx = 0; chunkx < (sizeH + CHUNK_SIZE - 1) / CHUNK_SIZE; chunkx++) {
  for (chunky = 0; chunky < (sizeV + CHUNK_SIZE - 1) / CHUNK_SIZE; chunky++) {
   //set the boundaries for this chunk
   SetChunkSize(chunk,chunkx, chunky, bounds, CHUNK_SIZE);

   channel->GetTile(chunk, &bucket;, eTileReadWrite);
   width=chunk.GetWidth();
   height=chunk.GetHeight();
   for (y=0;yRowPtr32(y);
    for (x=0;xSetChannel(channel);

}

Regards,

Sighman

Thanks again Eric, you are a wonder.

The secret line I was looking for was

gComponentUtilities->CoCreateInstance(CLSID_TextureMap, NULL, MC_CLSCTX_INPROC_SERVER, IID_IShTextureMap, (void**) &texture;);

The rest or your example is an extra + bonus.

I might actually get this project finished one day ;)

-Simon