void HandleSpecular(string text, RenderMaterial pbr)
{
glTFExtensions.KHR_materials_specular specular = Newtonsoft.Json.JsonConvert.DeserializeObject <glTFExtensions.KHR_materials_specular>(text);
if (specular == null)
{
pbr.SetParameter(PhysicallyBased.Specular, 1.0);
}
else
{
if (specular.SpecularTexture != null)
{
RenderTexture specularTexture = converter.GetRenderTextureFromChannel(specular.SpecularTexture.Index, RgbaChannel.Alpha);
pbr.SetChild(specularTexture, PhysicallyBased.Specular);
pbr.SetChildSlotOn(PhysicallyBased.Specular, true, RenderContent.ChangeContexts.Program);
pbr.SetChildSlotAmount(PhysicallyBased.Specular, specular.SpecularFactor * 100.0, RenderContent.ChangeContexts.Program);
}
else
{
pbr.SetParameter(PhysicallyBased.Specular, specular.SpecularFactor);
}
}
}
public int AddMaterial()
{
// Prep
glTFLoader.Schema.Material material = new glTFLoader.Schema.Material()
{
Name = renderMaterial.Name,
PbrMetallicRoughness = new glTFLoader.Schema.MaterialPbrMetallicRoughness(),
};
if (!rhinoMaterial.IsPhysicallyBased)
{
rhinoMaterial.ToPhysicallyBased();
}
Rhino.DocObjects.PhysicallyBasedMaterial pbr = rhinoMaterial.PhysicallyBased;
// Textures
Rhino.DocObjects.Texture metallicTexture = pbr.GetTexture(TextureType.PBR_Metallic);
Rhino.DocObjects.Texture roughnessTexture = pbr.GetTexture(TextureType.PBR_Roughness);
Rhino.DocObjects.Texture normalTexture = pbr.GetTexture(TextureType.Bump);
Rhino.DocObjects.Texture occlusionTexture = pbr.GetTexture(TextureType.PBR_AmbientOcclusion);
Rhino.DocObjects.Texture emissiveTexture = pbr.GetTexture(TextureType.PBR_Emission);
Rhino.DocObjects.Texture opacityTexture = pbr.GetTexture(TextureType.Opacity);
Rhino.DocObjects.Texture clearcoatTexture = pbr.GetTexture(TextureType.PBR_Clearcoat);
Rhino.DocObjects.Texture clearcoatRoughessTexture = pbr.GetTexture(TextureType.PBR_ClearcoatRoughness);
Rhino.DocObjects.Texture clearcoatNormalTexture = pbr.GetTexture(TextureType.PBR_ClearcoatBump);
Rhino.DocObjects.Texture specularTexture = pbr.GetTexture(TextureType.PBR_Specular);
HandleBaseColor(rhinoMaterial, material);
bool hasMetalTexture = metallicTexture == null ? false : metallicTexture.Enabled;
bool hasRoughnessTexture = roughnessTexture == null ? false : roughnessTexture.Enabled;
if (hasMetalTexture || hasRoughnessTexture)
{
material.PbrMetallicRoughness.MetallicRoughnessTexture = AddMetallicRoughnessTexture(rhinoMaterial);
float metallic = metallicTexture == null ? (float)pbr.Metallic : GetTextureWeight(metallicTexture);
float roughness = roughnessTexture == null ? (float)pbr.Roughness : GetTextureWeight(roughnessTexture);
material.PbrMetallicRoughness.MetallicFactor = metallic;
material.PbrMetallicRoughness.RoughnessFactor = roughness;
}
else
{
material.PbrMetallicRoughness.MetallicFactor = (float)pbr.Metallic;
material.PbrMetallicRoughness.RoughnessFactor = (float)pbr.Roughness;
}
if (normalTexture != null && normalTexture.Enabled)
{
material.NormalTexture = AddTextureNormal(normalTexture);
}
if (occlusionTexture != null && occlusionTexture.Enabled)
{
material.OcclusionTexture = AddTextureOcclusion(occlusionTexture);
}
if (emissiveTexture != null && emissiveTexture.Enabled)
{
material.EmissiveTexture = AddTexture(emissiveTexture.FileReference.FullPath);
float emissionMultiplier = 1.0f;
var param = rhinoMaterial.RenderMaterial.GetParameter("emission-multiplier");
if (param != null)
{
emissionMultiplier = (float)Convert.ToDouble(param);
}
material.EmissiveFactor = new float[]
{
emissionMultiplier,
emissionMultiplier,
emissionMultiplier,
};
}
else
{
material.EmissiveFactor = new float[]
{
rhinoMaterial.PhysicallyBased.Emission.R,
rhinoMaterial.PhysicallyBased.Emission.G,
rhinoMaterial.PhysicallyBased.Emission.B,
};
}
//Extensions
material.Extensions = new Dictionary <string, object>();
//Opacity => Transmission https://github.com/KhronosGroup/glTF/blob/master/extensions/2.0/Khronos/KHR_materials_transmission/README.md
glTFExtensions.KHR_materials_transmission transmission = new glTFExtensions.KHR_materials_transmission();
if (opacityTexture != null && opacityTexture.Enabled)
{
//Transmission texture is stored in an images R channel
//https://github.com/KhronosGroup/glTF/blob/master/extensions/2.0/Khronos/KHR_materials_transmission/README.md#properties
transmission.TransmissionTexture = GetSingleChannelTexture(opacityTexture, RgbaChannel.Red, true);
transmission.TransmissionFactor = GetTextureWeight(opacityTexture);
}
else
{
transmission.TransmissionFactor = 1.0f - (float)pbr.Opacity;
}
material.Extensions.Add(glTFExtensions.KHR_materials_transmission.Tag, transmission);
//Clearcoat => Clearcoat https://github.com/KhronosGroup/glTF/blob/master/extensions/2.0/Khronos/KHR_materials_clearcoat/README.md
glTFExtensions.KHR_materials_clearcoat clearcoat = new glTFExtensions.KHR_materials_clearcoat();
if (clearcoatTexture != null && clearcoatTexture.Enabled)
{
clearcoat.ClearcoatTexture = AddTexture(clearcoatTexture.FileReference.FullPath);
clearcoat.ClearcoatFactor = GetTextureWeight(clearcoatTexture);
}
else
{
clearcoat.ClearcoatFactor = (float)pbr.Clearcoat;
}
if (clearcoatRoughessTexture != null && clearcoatRoughessTexture.Enabled)
{
clearcoat.ClearcoatRoughnessTexture = AddTexture(clearcoatRoughessTexture.FileReference.FullPath);
clearcoat.ClearcoatRoughnessFactor = GetTextureWeight(clearcoatRoughessTexture);
}
else
{
clearcoat.ClearcoatRoughnessFactor = (float)pbr.ClearcoatRoughness;
}
if (clearcoatNormalTexture != null && clearcoatNormalTexture.Enabled)
{
clearcoat.ClearcoatNormalTexture = AddTextureNormal(clearcoatNormalTexture);
}
material.Extensions.Add(glTFExtensions.KHR_materials_clearcoat.Tag, clearcoat);
//Opacity IOR -> IOR https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_ior
glTFExtensions.KHR_materials_ior ior = new glTFExtensions.KHR_materials_ior()
{
Ior = (float)pbr.OpacityIOR,
};
material.Extensions.Add(glTFExtensions.KHR_materials_ior.Tag, ior);
//Specular -> Specular https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_specular
glTFExtensions.KHR_materials_specular specular = new glTFExtensions.KHR_materials_specular();
if (specularTexture != null && specularTexture.Enabled)
{
//Specular is stored in the textures alpha channel
specular.SpecularTexture = GetSingleChannelTexture(specularTexture, RgbaChannel.Alpha, false);
specular.SpecularFactor = GetTextureWeight(specularTexture);
}
else
{
specular.SpecularFactor = (float)pbr.Specular;
}
material.Extensions.Add(glTFExtensions.KHR_materials_specular.Tag, specular);
return(dummy.Materials.AddAndReturnIndex(material));
}
