/// <summary>
/// To the helix material.
/// </summary>
/// <param name="material">The material.</param>
/// <returns></returns>
/// <exception cref="System.NotSupportedException">Shading Mode {material.ShadingMode}</exception>
protected virtual KeyValuePair <global::Assimp.Material, MaterialCore> OnCreateHelixMaterial(global::Assimp.Material material)
{
MaterialCore core = null;
if (!material.HasShadingMode)
{
if (material.HasNonTextureProperty(GLTFMatKeys.AI_MATKEY_GLTF_METALLIC_FACTOR) ||
material.HasNonTextureProperty(GLTFMatKeys.AI_MATKEY_GLTF_ROUGHNESS_FACTOR) ||
material.HasNonTextureProperty(GLTFMatKeys.AI_MATKEY_GLTF_BASECOLOR_FACTOR))
{
material.ShadingMode = ShadingMode.Fresnel;
}
else if (material.HasColorSpecular || material.HasColorDiffuse || material.HasTextureDiffuse)
{
material.ShadingMode = ShadingMode.Blinn;
}
else
{
material.ShadingMode = ShadingMode.Gouraud;
}
}
var mode = material.ShadingMode;
if (Configuration.ImportMaterialType != MaterialType.Auto)
{
switch (Configuration.ImportMaterialType)
{
case MaterialType.BlinnPhong:
mode = ShadingMode.Blinn;
break;
case MaterialType.Diffuse:
mode = ShadingMode.Gouraud;
break;
case MaterialType.PBR:
mode = ShadingMode.Fresnel;
break;
case MaterialType.VertexColor:
core = new ColorMaterialCore();
break;
case MaterialType.Normal:
core = new NormalMaterialCore();
break;
case MaterialType.Position:
core = new PositionMaterialCore();
break;
}
}
if (core == null)
{
switch (mode)
{
case ShadingMode.Blinn:
case ShadingMode.Phong:
case ShadingMode.None:
core = OnCreatePhongMaterial(material);
break;
case ShadingMode.CookTorrance:
case ShadingMode.Fresnel:
case ShadingMode.OrenNayar:
core = OnCreatePBRMaterial(material);
break;
case ShadingMode.Gouraud:
var diffuse = new DiffuseMaterialCore
{
DiffuseColor = material.ColorDiffuse.ToSharpDXColor4()
};
if (material.HasOpacity)
{
var c = diffuse.DiffuseColor;
c.Alpha = material.Opacity;
diffuse.DiffuseColor = c;
}
if (material.HasTextureDiffuse)
{
diffuse.DiffuseMap = LoadTexture(material.TextureDiffuse.FilePath);
diffuse.DiffuseMapFilePath = material.TextureDiffuse.FilePath;
}
if (material.ShadingMode == ShadingMode.Flat)
{
diffuse.EnableFlatShading = true;
}
core = diffuse;
break;
case ShadingMode.Flat:
core = OnCreatePhongMaterial(material);
if (core is PhongMaterialCore p)
{
p.EnableFlatShading = true;
}
break;
default:
switch (Configuration.ImportMaterialType)
{
case MaterialType.Position:
core = new PositionMaterialCore();
break;
case MaterialType.Normal:
core = new NormalMaterialCore();
break;
default:
Log(HelixToolkit.Logger.LogLevel.Warning, $"Shading Mode is not supported:{material.ShadingMode}");
core = new DiffuseMaterialCore()
{
DiffuseColor = Color.Red, EnableUnLit = true
};
break;
}
break;
}
}
if (core != null)
{
core.Name = string.IsNullOrEmpty(material.Name) ? $"Material_{Interlocked.Increment(ref MaterialIndexForNoName)}" : material.Name;
}
return(new KeyValuePair <global::Assimp.Material, MaterialCore>(material, core));
}
public VertColorMaterial(ColorMaterialCore core) : base(core)
{
}
