protected override MaterialContent Convert(SharpGLTF.Schema2.Material srcMaterial)
{
var dstMaterial = new MaterialContent();
dstMaterial.Name = srcMaterial.Name;
dstMaterial.Tag = _TagConverter?.Invoke(srcMaterial);
dstMaterial.DoubleSided = srcMaterial.DoubleSided;
dstMaterial.AlphaCutoff = srcMaterial.AlphaCutoff;
switch (srcMaterial.Alpha)
{
case SharpGLTF.Schema2.AlphaMode.OPAQUE: dstMaterial.Mode = MaterialBlendMode.Opaque; break;
case SharpGLTF.Schema2.AlphaMode.MASK: dstMaterial.Mode = MaterialBlendMode.Mask; break;
case SharpGLTF.Schema2.AlphaMode.BLEND: dstMaterial.Mode = MaterialBlendMode.Blend; break;
}
if (srcMaterial.Unlit)
{
dstMaterial.PreferredShading = "Unlit";
}
else if (srcMaterial.FindChannel("SpecularGlossiness") != null)
{
dstMaterial.PreferredShading = "SpecularGlossiness";
}
else if (srcMaterial.FindChannel("MetallicRoughness") != null)
{
dstMaterial.PreferredShading = "MetallicRoughness";
}
foreach (var srcChannel in srcMaterial.Channels)
{
var dstChannel = dstMaterial.UseChannel(srcChannel.Key);
dstChannel.Value = ParamToArray(srcChannel);
if (srcChannel.Texture != null)
{
var imgData = srcChannel.Texture.PrimaryImage.Content.Content.ToArray();
var texContent = new ImageContent(imgData);
dstChannel.TextureIndex = UseTexture(texContent);
dstChannel.Sampler = ToXna(srcChannel.Texture.Sampler);
}
else
{
dstChannel.Sampler = SamplerStateContent.CreateDefault();
}
dstChannel.VertexIndexSet = srcChannel.TextureCoordinate;
dstChannel.Transform = (srcChannel.TextureTransform?.Matrix ?? System.Numerics.Matrix3x2.Identity).ToXna();
}
return(dstMaterial);
}
private static void SetTexture(MaterialContent dstMaterial, string slot, Assimp.TextureSlot srcSlot)
{
var dstChannel = dstMaterial.UseChannel(slot);
dstChannel.VertexIndexSet = srcSlot.UVIndex;
}
