private static Vector3 GetDiffuseColor(Schema2.Material srcMaterial)
{
var diffuse = srcMaterial.FindChannel("Diffuse");
if (diffuse == null) diffuse = srcMaterial.FindChannel("BaseColor");
if (diffuse == null) return Vector3.One;
return new Vector3(diffuse.Value.Parameter.X, diffuse.Value.Parameter.Y, diffuse.Value.Parameter.Z);
}
private Texture2D GetDiffuseTexture(Schema2.Material srcMaterial)
{
var diffuse = srcMaterial.FindChannel("Diffuse");
if (diffuse == null) diffuse = srcMaterial.FindChannel("BaseColor");
if (diffuse == null) return null;
var name = srcMaterial.Name;
if (name == null) name = "null";
name += "-Diffuse";
return _TexFactory.UseTexture(diffuse.Value.Texture?.PrimaryImage?.GetImageContent() ?? default, name);
}
private static Vector3 GeEmissiveColor(Schema2.Material srcMaterial)
{
var emissive = srcMaterial.FindChannel("Emissive");
if (emissive == null) return Vector3.Zero;
return new Vector3(emissive.Value.Parameter.X, emissive.Value.Parameter.Y, emissive.Value.Parameter.Z);
}
private static float GetAlphaLevel(Schema2.Material srcMaterial)
{
if (srcMaterial.Alpha == Schema2.AlphaMode.OPAQUE) return 1;
var baseColor = srcMaterial.FindChannel("BaseColor");
if (baseColor == null) return 1;
return baseColor.Value.Parameter.W;
}
private static float GetSpecularPower(Schema2.Material srcMaterial)
{
var mr = srcMaterial.FindChannel("MetallicRoughness");
if (mr == null) return 16; // default value = 16
var metallic = mr.Value.Parameter.X;
var roughness = mr.Value.Parameter.Y;
return 4 + 16 * metallic;
}
private Texture2D GetDiffuseTexture(Schema2.Material srcMaterial)
{
var diffuse = srcMaterial.FindChannel("Diffuse");
if (diffuse == null)
{
diffuse = srcMaterial.FindChannel("BaseColor");
}
if (diffuse == null)
{
return(null);
}
var name = srcMaterial.Name;
if (name == null)
{
name = "null";
}
name += "-Diffuse";
return(_TexFactory.UseTexture(diffuse.Value.Texture?.PrimaryImage?.Content ?? default, name));
}
private static Vector3 GetSpecularColor(Schema2.Material srcMaterial)
{
var mr = srcMaterial.FindChannel("MetallicRoughness");
if (mr == null) return Vector3.One; // default value 16
var diffuse = GetDiffuseColor(srcMaterial);
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 k;
}
