private Material CreateMaterial(SharpGLTF.Schema2.Material mat, string ddsPath, int id)
{
if (mat != null)
{
return(new Material()
{
Id = (uint)id,
Shader = DecodeShaderName(mat.Name),
Textures = new[]
{
GetBaseColorTexture(mat, ddsPath),
GetRoughnessTexture(mat, ddsPath),
mat.FindChannel(KnownChannel.Normal.ToString())?.Texture?.PrimaryImage?.Name,
}
});
}
else
{
return(new Material()
{
Id = (uint)id,
Shader = GmdUtils.PBR_MAT,
Textures = new string[]
{
}
});
}
}
private static int GetMaterialColor(Schema2.Material material)
{
var mb = new MaterialBuilder();
material.CopyTo(mb);
return(GetMaterialColor(mb));
}
/// <summary>
/// Gets the specular color for the specified material.
/// </summary>
protected Color GetMaterialSpecularColor(SharpGLTF.Schema2.Material material)
{
if (material == null)
{
return(Color.White);
}
var mr = material.FindChannel("MetallicRoughness");
if (mr == null)
{
return(Color.White);
}
var diffuse = GetMaterialDiffuseColor(material).ToVector3();
var metallic = mr.Value.Parameter.X;
var roughness = mr.Value.Parameter.Y;
var k = Vector3.Zero;
k += Vector3.Lerp(diffuse, Vector3.Zero, roughness);
k += Vector3.Lerp(diffuse, Vector3.One, metallic);
k *= 0.5f;
return(new Color(k));
}
private string GetRoughnessTexture(SharpGLTF.Schema2.Material mat, string ddsPath)
{
var channel = mat.FindChannel(KnownChannel.MetallicRoughness.ToString());
if (channel?.Texture?.PrimaryImage?.Name != null)
{
return(channel.Value.Texture.PrimaryImage.Name);
}
if (ddsPath != null)
{
var filename = $"{Guid.NewGuid().ToString().Substring(0, 8)}.dds";
var converter = new ImageConverter(ddsPath);
if (channel.HasValue)
{
converter.GenerateMetallicRoughnessOcclusion(filename, channel.Value.Parameter.X, channel.Value.Parameter.Y, 1);
}
else
{
converter.GenerateMetallicRoughnessOcclusion(filename, 0, 0.8f, 1);
}
return(Path.GetFileNameWithoutExtension(filename));
}
return(null);
}
/// <summary>
/// Gets the diffuse color for the specified material.
/// </summary>
protected Color GetMaterialDiffuseColor(SharpGLTF.Schema2.Material material)
{
if (material == null)
{
return(Color.White);
}
var diffuse = material.FindChannel("Diffuse") ?? material.FindChannel("BaseColor");
if (diffuse == null)
{
return(Color.White);
}
return(new Color(diffuse.Value.Parameter.X, diffuse.Value.Parameter.Y, diffuse.Value.Parameter.Z));
}
/// <summary>
/// Gets the emissive color for the specified material.
/// </summary>
protected Color GetMaterialEmissiveColor(SharpGLTF.Schema2.Material material)
{
if (material == null)
{
return(Color.Black);
}
var emissive = material.FindChannel("Emissive");
if (emissive == null)
{
return(Color.Black);
}
return(new Color(emissive.Value.Parameter.X, emissive.Value.Parameter.Y, emissive.Value.Parameter.Z));
}
private void _WriteMeshPrimitive(MeshPrimitiveReader srcPrim, SRCMATERIAL srcMaterial)
{
if (srcMaterial == null)
{
srcMaterial = GetDefaultMaterial();
}
var effect = _MatFactory.GetMaterial(srcMaterial, srcPrim.IsSkinned);
if (effect == null)
{
effect = CreateEffect(srcMaterial, srcPrim.IsSkinned);
_MatFactory.Register(srcMaterial, srcPrim.IsSkinned, effect);
}
WriteMeshPrimitive(srcPrim, effect);
}
/// <summary>
/// Gets the specular power for the specified material.
/// </summary>
protected Single GetMaterialSpecularPower(SharpGLTF.Schema2.Material material)
{
if (material == null)
{
return(16f);
}
var mr = material.FindChannel("MetallicRoughness");
if (mr == null)
{
return(16f);
}
var metallic = mr.Value.Parameter.X;
return(4f + 16f * metallic);
}
private string GetBaseColorTexture(SharpGLTF.Schema2.Material mat, string ddsPath)
{
var channel = mat.FindChannel(KnownChannel.BaseColor.ToString());
if (channel?.Texture?.PrimaryImage?.Name != null)
{
return(channel.Value.Texture.PrimaryImage.Name);
}
if (ddsPath != null && channel.HasValue)
{
var filename = $"{Guid.NewGuid().ToString().Substring(0, 8)}.dds";
var converter = new ImageConverter(ddsPath);
converter.GenerateColorTexture(filename, channel.Value.Parameter.X, channel.Value.Parameter.Y, channel.Value.Parameter.Z,
channel.Value.Parameter.W);
return(Path.GetFileNameWithoutExtension(filename));
}
return(null);
}
/// <summary>
/// Gets the alpha for the specified material.
/// </summary>
protected Single GetMaterialAlpha(SharpGLTF.Schema2.Material material)
{
if (material == null)
{
return(1f);
}
if (material.Alpha == AlphaMode.OPAQUE)
{
return(1f);
}
var baseColor = material.FindChannel("BaseColor");
if (baseColor == null)
{
return(1f);
}
return(baseColor.Value.Parameter.W);
}
/// <summary>
/// Gets the texture for the specified material.
/// </summary>
protected Texture2D GetMaterialTexture(ContentManager contentManager, SharpGLTF.Schema2.Material material)
{
if (material == null)
{
return(null);
}
var diffuse = material.FindChannel("Diffuse") ?? material.FindChannel("BaseColor");
if (diffuse == null)
{
return(null);
}
var texture = diffuse.Value.Texture;
if (texture != null)
{
var textureName = $"{diffuse.Value.LogicalParent.Name ?? "null"}-{diffuse.Value.Key}";
var textureContent = texture.PrimaryImage?.Content;
if (textureContent != null && textureContent.Value.IsValid)
{
if (!textureCache.TryGetValue(textureName, out var textureResource))
{
using (var textureStream = textureContent.Value.Open())
{
textureResource = contentManager.LoadFromStream <Texture2D>(textureStream, textureContent.Value.FileExtension);
}
textureCache[textureName] = textureResource;
}
return(textureResource);
}
}
return(null);
}
