public static VertexChannel GetTextureChannel(List<VertexChannel> channels, VertexChannelType channelIndex)
{
//it is valid, though rare, for a mesh to have no texture coordinates. in this case we will return position data in order that the triplets can be build efficiently.
var fallback_channel = channels.Where(c => c.m_type == VertexChannelType.Positions).FirstOrDefault();
//channel 1 is the default texture coordinate map channel
var channel = channels.Where(c => c.m_type == VertexChannelType.Texture1).FirstOrDefault();
if (channel != null)
{
fallback_channel = channel;
}
//now we have set up the fallbacks, search for the channel we actually want
channel = channels.Where(c => c.m_type == (VertexChannelType)channelIndex).FirstOrDefault();
if (channel == null)
{
channel = fallback_channel;
//we will always search for up to two channels by default, and it will not be uncommon to only have one. If the user has requested a channel especially however
//we should let them know.
if ((int)channelIndex > 2)
{
Debug.Log("Warning, could not find request channel number " + channelIndex);
}
}
return channel;
}
public virtual void Read(PackFileDeserializer des, BinaryReaderEx br)
{
m_name = des.ReadStringPointer(br);
m_type = (VertexChannelType)br.ReadUInt32();
br.ReadUInt32();
}