/// <summary>
/// Called when [create assimp material].
/// </summary>
/// <param name="material">The material.</param>
/// <returns></returns>
protected virtual global::Assimp.Material OnCreateAssimpMaterial(MaterialCore material)
{
var assimpMaterial = new global::Assimp.Material()
{
Name = string.IsNullOrEmpty(material.Name) ? $"MAT_{Interlocked.Increment(ref MaterialIndexForNoName)}" : material.Name
};
if (material is PhongMaterialCore phong)
{
AddProperties(phong, assimpMaterial);
}
else if (material is PBRMaterialCore pbr)
{
AddProperties(pbr, assimpMaterial);
}
else if (material is DiffuseMaterialCore diffuse)
{
AddProperties(diffuse, assimpMaterial);
}
else if (material is ColorMaterialCore vColor)
{
assimpMaterial.ShadingMode = ShadingMode.Flat;
}
else if (material is LineMaterialCore line)
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_DIFFUSE_BASE, line.LineColor.ToAssimpColor4D()));
}
else if (material is PointMaterialCore point)
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_DIFFUSE_BASE, point.PointColor.ToAssimpColor4D()));
}
return(assimpMaterial);
}
/// <summary>
/// Adds the properties.
/// </summary>
/// <param name="phong">The phong.</param>
/// <param name="assimpMaterial">The assimp material.</param>
protected virtual void AddProperties(PhongMaterialCore phong, global::Assimp.Material assimpMaterial)
{
assimpMaterial.ShadingMode = ShadingMode.Blinn;
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_DIFFUSE_BASE, phong.DiffuseColor.ToAssimpColor4D()));
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_SPECULAR_BASE, phong.SpecularColor.ToAssimpColor4D()));
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_REFLECTIVE_BASE, phong.ReflectiveColor.ToAssimpColor4D()));
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_EMISSIVE_BASE, phong.EmissiveColor.ToAssimpColor4D()));
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_AMBIENT_BASE, phong.AmbientColor.ToAssimpColor4D()));
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.SHININESS_BASE, phong.SpecularShininess));
if (phong.DiffuseColor.Alpha < 1f)
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.OPACITY_BASE, phong.DiffuseColor.Alpha));
}
if (phong.DiffuseMap != null && !string.IsNullOrEmpty(phong.DiffuseMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, phong.DiffuseMapFilePath, TextureType.Diffuse, 0));
assimpMaterial.AddProperty(new MaterialProperty(
AiMatKeys.GetFullTextureName(AiMatKeys.MAPPINGMODE_U_BASE, TextureType.Diffuse, 0),
(int)ToAssimpAddressMode(phong.DiffuseMapSampler.AddressU)));
assimpMaterial.AddProperty(new MaterialProperty(
AiMatKeys.GetFullTextureName(AiMatKeys.MAPPINGMODE_V_BASE, TextureType.Diffuse, 0),
(int)ToAssimpAddressMode(phong.DiffuseMapSampler.AddressV)));
}
if (phong.EmissiveMap != null && !string.IsNullOrEmpty(phong.EmissiveMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, phong.EmissiveMapFilePath, TextureType.Emissive, 0));
}
if (phong.NormalMap != null && !string.IsNullOrEmpty(phong.NormalMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, phong.NormalMapFilePath, TextureType.Normals, 0));
}
if (phong.DisplacementMap != null && !string.IsNullOrEmpty(phong.DisplacementMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, phong.DisplacementMapFilePath, TextureType.Displacement, 0));
}
if (phong.SpecularColorMap != null && !string.IsNullOrEmpty(phong.SpecularColorMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, phong.SpecularColorMapFilePath, TextureType.Specular, 0));
}
if (phong.DiffuseAlphaMap != null && !string.IsNullOrEmpty(phong.DiffuseAlphaMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, phong.DiffuseAlphaMapFilePath, TextureType.Opacity, 0));
}
if (phong.UVTransform.HasUVTransform)
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.UVTRANSFORM_BASE, phong.UVTransform.ToArray()));
}
}
/// <summary>
/// Adds the properties.
/// </summary>
/// <param name="diffuse">The diffuse.</param>
/// <param name="assimpMaterial">The assimp material.</param>
protected virtual void AddProperties(DiffuseMaterialCore diffuse, global::Assimp.Material assimpMaterial)
{
assimpMaterial.ShadingMode = ShadingMode.Gouraud;
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_DIFFUSE_BASE, diffuse.DiffuseColor.ToAssimpColor4D()));
}
/// <summary>
/// Adds the properties.
/// </summary>
/// <param name="pbr">The PBR.</param>
/// <param name="assimpMaterial">The assimp material.</param>
protected virtual void AddProperties(PBRMaterialCore pbr, global::Assimp.Material assimpMaterial)
{
assimpMaterial.ShadingMode = ShadingMode.Fresnel;
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_DIFFUSE_BASE, pbr.AlbedoColor.ToAssimpColor4D()));
assimpMaterial.AddProperty(new MaterialProperty(GLTFMatKeys.AI_MATKEY_GLTF_BASECOLOR_FACTOR, pbr.AlbedoColor.ToAssimpColor4D()));
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_EMISSIVE_BASE, pbr.EmissiveColor.ToAssimpColor4D()));
assimpMaterial.AddProperty(new MaterialProperty(GLTFMatKeys.AI_MATKEY_GLTF_METALLIC_FACTOR, pbr.MetallicFactor));
assimpMaterial.AddProperty(new MaterialProperty(GLTFMatKeys.AI_MATKEY_GLTF_ROUGHNESS_FACTOR, pbr.RoughnessFactor));
if (pbr.AmbientOcclusionFactor != 1)
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.COLOR_AMBIENT, new Color4D(pbr.AmbientOcclusionFactor)));
}
if (pbr.ReflectanceFactor != 0)
{
assimpMaterial.AddProperty(new MaterialProperty(GLTFMatKeys.AI_MATKEY_GLTF_PBRSPECULARGLOSSINESS, true));
assimpMaterial.AddProperty(new MaterialProperty(GLTFMatKeys.AI_MATKEY_GLTF_PBRSPECULARGLOSSINESS_GLOSSINESS_FACTOR, pbr.ReflectanceFactor));
}
if (pbr.AlbedoColor.Alpha < 1)
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.OPACITY, pbr.AlbedoColor.Alpha));
}
if (pbr.AlbedoMap != null && !string.IsNullOrEmpty(pbr.AlbedoMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, pbr.AlbedoMapFilePath, TextureType.Diffuse, 0));
assimpMaterial.AddProperty(new MaterialProperty(
AiMatKeys.GetFullTextureName(AiMatKeys.MAPPINGMODE_U_BASE, TextureType.Diffuse, 0),
(int)ToAssimpAddressMode(pbr.SurfaceMapSampler.AddressU)));
assimpMaterial.AddProperty(new MaterialProperty(
AiMatKeys.GetFullTextureName(AiMatKeys.MAPPINGMODE_V_BASE, TextureType.Diffuse, 0),
(int)ToAssimpAddressMode(pbr.SurfaceMapSampler.AddressV)));
}
if (pbr.RoughnessMetallicMap != null && !string.IsNullOrEmpty(pbr.RoughnessMetallicMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(GLTFMatKeys.AI_MATKEY_GLTF_METALLICROUGHNESSAO_TEXTURE,
pbr.RoughnessMetallicMapFilePath, TextureType.Unknown, 0));
}
if (pbr.EmissiveMap != null && !string.IsNullOrEmpty(pbr.EmissiveMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, pbr.EmissiveMapFilePath, TextureType.Emissive, 0));
}
if (pbr.NormalMap != null && !string.IsNullOrEmpty(pbr.NormalMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, pbr.NormalMapFilePath, TextureType.Normals, 0));
}
if (pbr.DisplacementMap != null && !string.IsNullOrEmpty(pbr.DisplacementMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, pbr.DisplacementMapFilePath, TextureType.Displacement, 0));
}
if (pbr.IrradianceMap != null && !string.IsNullOrEmpty(pbr.IrradianceMapFilePath))
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.TEXTURE_BASE, pbr.IrradianceMapFilePath, TextureType.Lightmap, 0));
}
if (pbr.UVTransform.HasUVTransform)
{
assimpMaterial.AddProperty(new MaterialProperty(AiMatKeys.UVTRANSFORM_BASE, pbr.UVTransform.ToArray()));
}
}