/// <summary>
/// Modify the material to comply with its transparency parameters.
/// </summary>
/// <param name="material">The material/</param>
private static void AdjustForTransparency(MaterialDescription material)
{
// Note: at this point, there is no other nodes than diffuse, specular, transparent, normal and displacement
if (material.ColorNodes.ContainsKey(MaterialParameters.AlbedoDiffuse))
{
var diffuseNode = material.GetMaterialNode(MaterialParameters.AlbedoDiffuse);
if (material.ColorNodes.ContainsKey(MaterialParameters.TransparencyMap))
{
var diffuseNodeName = material.ColorNodes[MaterialParameters.AlbedoDiffuse];
var transparentNodeName = material.ColorNodes[MaterialParameters.TransparencyMap];
var transparentNode = material.GetMaterialNode(MaterialParameters.TransparencyMap);
if (diffuseNode == null || transparentNode == null)
{
return;
}
var foundTextureDiffuse = FindTextureNode(material, diffuseNodeName);
var foundTextureTransparent = FindTextureNode(material, transparentNodeName);
if (foundTextureDiffuse != null && foundTextureTransparent != null)
{
if (foundTextureDiffuse != foundTextureTransparent)
{
var alphaMixNode = new MaterialBinaryNode(diffuseNode, transparentNode, MaterialBinaryOperand.SubstituteAlpha);
material.AddColorNode(MaterialParameters.AlbedoDiffuse, "pdx_diffuseWithAlpha", alphaMixNode);
}
}
// set the key if it was missing
material.Parameters.Set(MaterialParameters.UseTransparent, true);
}
else
{
// NOTE: MaterialParameters.UseTransparent is mostly runtime
var isTransparent = false;
if (material.Parameters.ContainsKey(MaterialParameters.UseTransparent))
{
isTransparent = (bool)material.Parameters[MaterialParameters.UseTransparent];
}
if (!isTransparent)
{
// remove the diffuse node
var diffuseName = material.ColorNodes[MaterialParameters.AlbedoDiffuse];
material.Nodes.Remove(diffuseName);
// add the new one
var opaqueNode = new MaterialBinaryNode(diffuseNode, null, MaterialBinaryOperand.Opaque);
material.AddColorNode(MaterialParameters.AlbedoDiffuse, "pdx_diffuseOpaque", opaqueNode);
}
}
}
}
