void setMaterialIdentifierMapChannel( const COLLADAFW::ColorOrTexture& colorOrTexture,
const COLLADAFW::TextureCoordinateBindingArray& texCoordBindings,
const DocumentImporter::SetMapChannelMap& setMapChannelMap,
MaterialCreator::MaterialIdentifier::SlotFlags slot,
unsigned char& slotFlags,
unsigned char& mapChannel)
{
if ( !colorOrTexture.isTexture() )
{
mapChannel = 0;
return;
}
slotFlags |= slot;
const COLLADAFW::Texture& texture = colorOrTexture.getTexture();
COLLADAFW::TextureMapId mapId = texture.getTextureMapId();
// find the map id in the list of bind texture coordinates
size_t texCoordBindingsCount = texCoordBindings.getCount();
size_t setIndex;
bool found = false;
for ( size_t i = 0; i < texCoordBindingsCount; ++i)
{
const COLLADAFW::TextureCoordinateBinding& texCoordBinding = texCoordBindings[i];
if ( texCoordBinding.getTextureMapId () == mapId )
{
setIndex = texCoordBinding.getSetIndex ();
found = true;
break;
}
}
if ( !found || setMapChannelMap.empty() )
{
// if we could not resolve we need to guess and chose 1.*/
mapChannel = 1;
}
else
{
DocumentImporter::SetMapChannelMap::const_iterator it = setMapChannelMap.find( setIndex );
if ( it == setMapChannelMap.end() )
{
// could not find a map channel, take the first
mapChannel = setMapChannelMap.begin()->second;
}
else
{
mapChannel = (unsigned char) it->second;
}
}
}
