318 lines
13 KiB
C#
318 lines
13 KiB
C#
using System.IO;
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using UnityEngine;
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using UnityEngine.Rendering;
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using UnityEngine.Rendering.Universal;
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#if UNITY_2020_2_OR_NEWER
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using UnityEditor.AssetImporters;
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#else
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using UnityEditor.Experimental.AssetImporters;
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#endif
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namespace UnityEditor.Rendering.Universal
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{
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class FBXArnoldSurfaceMaterialDescriptionPreprocessor : AssetPostprocessor
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{
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static readonly uint k_Version = 3;
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static readonly int k_Order = -960;
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static readonly string k_ShaderPath = "Packages/com.unity.render-pipelines.universal/Runtime/Materials/ArnoldStandardSurface/ArnoldStandardSurface.shadergraph";
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static readonly string k_ShaderTransparentPath = "Packages/com.unity.render-pipelines.universal/Runtime/Materials/ArnoldStandardSurface/ArnoldStandardSurfaceTransparent.shadergraph";
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public override uint GetVersion()
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{
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return k_Version;
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}
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public override int GetPostprocessOrder()
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{
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return k_Order;
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}
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static bool IsMayaArnoldStandardSurfaceMaterial(MaterialDescription description)
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{
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float typeId;
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description.TryGetProperty("TypeId", out typeId);
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return typeId == 1138001;
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}
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static bool Is3DsMaxArnoldStandardSurfaceMaterial(MaterialDescription description)
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{
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float classIdA;
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float classIdB;
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string originalMtl;
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description.TryGetProperty("ClassIDa", out classIdA);
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description.TryGetProperty("ClassIDb", out classIdB);
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description.TryGetProperty("ORIGINAL_MTL", out originalMtl);
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return classIdA == 2121471519 && classIdB == 1660373836 && originalMtl != "PHYSICAL_MTL";
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}
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public void OnPreprocessMaterialDescription(MaterialDescription description, Material material,
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AnimationClip[] clips)
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{
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var pipelineAsset = GraphicsSettings.currentRenderPipeline;
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if (!pipelineAsset || pipelineAsset.GetType() != typeof(UniversalRenderPipelineAsset))
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return;
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var lowerCasePath = Path.GetExtension(assetPath).ToLower();
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if (lowerCasePath == ".fbx")
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{
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if (IsMayaArnoldStandardSurfaceMaterial(description))
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CreateFromMayaArnoldStandardSurfaceMaterial(description, material, clips);
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else if (Is3DsMaxArnoldStandardSurfaceMaterial(description))
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CreateFrom3DsMaxArnoldStandardSurfaceMaterial(description, material, clips);
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}
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}
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void CreateFromMayaArnoldStandardSurfaceMaterial(MaterialDescription description, Material material,
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AnimationClip[] clips)
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{
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float floatProperty;
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Vector4 vectorProperty;
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TexturePropertyDescription textureProperty;
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Shader shader;
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float opacity = 1.0f;
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Vector4 opacityColor;
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TexturePropertyDescription opacityMap;
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description.TryGetProperty("opacity", out opacityColor);
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bool hasOpacityMap = description.TryGetProperty("opacity", out opacityMap);
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opacity = Mathf.Min(Mathf.Min(opacityColor.x, opacityColor.y), opacityColor.z);
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float transmission;
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description.TryGetProperty("transmission", out transmission);
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if (opacity == 1.0f && !hasOpacityMap)
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{
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opacity = 1.0f - transmission;
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}
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if (opacity < 1.0f || hasOpacityMap)
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{
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shader = AssetDatabase.LoadAssetAtPath<Shader>(k_ShaderTransparentPath);
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if (shader == null)
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return;
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material.shader = shader;
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if (hasOpacityMap)
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{
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material.SetTexture("_OPACITY_MAP", opacityMap.texture);
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material.SetFloat("_OPACITY", 1.0f);
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}
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else
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{
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material.SetFloat("_OPACITY", opacity);
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}
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}
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else
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{
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shader = AssetDatabase.LoadAssetAtPath<Shader>(k_ShaderPath);
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if (shader == null)
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return;
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material.shader = shader;
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}
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foreach (var clip in clips)
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{
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clip.ClearCurves();
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}
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description.TryGetProperty("base", out floatProperty);
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if (description.TryGetProperty("baseColor", out textureProperty))
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{
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SetMaterialTextureProperty("_BASE_COLOR_MAP", material, textureProperty);
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material.SetColor("_BASE_COLOR", Color.white * floatProperty);
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}
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else if (description.TryGetProperty("baseColor", out vectorProperty))
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{
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if (QualitySettings.activeColorSpace == ColorSpace.Gamma)
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{
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vectorProperty.x = Mathf.LinearToGammaSpace(vectorProperty.x);
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vectorProperty.y = Mathf.LinearToGammaSpace(vectorProperty.y);
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vectorProperty.z = Mathf.LinearToGammaSpace(vectorProperty.z);
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vectorProperty *= floatProperty;
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}
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material.SetColor("_BASE_COLOR", vectorProperty * floatProperty);
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}
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if (description.TryGetProperty("emission", out floatProperty) && floatProperty > 0.0f)
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{
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remapPropertyColorOrTexture(description, material, "emissionColor", "_EMISSION_COLOR", floatProperty);
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}
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remapPropertyFloatOrTexture(description, material, "metalness", "_METALNESS");
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description.TryGetProperty("specular", out floatProperty);
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remapPropertyColorOrTexture(description, material, "specularColor", "_SPECULAR_COLOR", floatProperty);
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remapPropertyFloatOrTexture(description, material, "specularRoughness", "_SPECULAR_ROUGHNESS");
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remapPropertyFloatOrTexture(description, material, "specularIOR", "_SPECULAR_IOR");
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remapPropertyTexture(description, material, "normalCamera", "_NORMAL_MAP");
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}
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void CreateFrom3DsMaxArnoldStandardSurfaceMaterial(MaterialDescription description, Material material,
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AnimationClip[] clips)
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{
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float floatProperty;
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Vector4 vectorProperty;
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TexturePropertyDescription textureProperty;
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var shader = AssetDatabase.LoadAssetAtPath<Shader>(k_ShaderPath);
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if (shader == null)
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return;
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material.shader = shader;
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foreach (var clip in clips)
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{
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clip.ClearCurves();
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}
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float opacity = 1.0f;
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Vector4 opacityColor;
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TexturePropertyDescription opacityMap;
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description.TryGetProperty("opacity", out opacityColor);
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bool hasOpacityMap = description.TryGetProperty("opacity", out opacityMap);
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opacity = Mathf.Min(Mathf.Min(opacityColor.x, opacityColor.y), opacityColor.z);
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if (opacity < 1.0f || hasOpacityMap)
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{
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if (hasOpacityMap)
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{
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material.SetTexture("_OPACITY_MAP", opacityMap.texture);
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material.SetFloat("_OPACITY", 1.0f);
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}
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else
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{
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material.SetFloat("_OPACITY", opacity);
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}
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}
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description.TryGetProperty("base", out floatProperty);
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if (description.TryGetProperty("base_color.shader", out textureProperty))
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{
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SetMaterialTextureProperty("_BASE_COLOR_MAP", material, textureProperty);
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material.SetColor("_BASE_COLOR", Color.white * floatProperty);
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}
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else if (description.TryGetProperty("base_color", out vectorProperty))
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{
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if (QualitySettings.activeColorSpace == ColorSpace.Gamma)
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{
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vectorProperty.x = Mathf.LinearToGammaSpace(vectorProperty.x);
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vectorProperty.y = Mathf.LinearToGammaSpace(vectorProperty.y);
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vectorProperty.z = Mathf.LinearToGammaSpace(vectorProperty.z);
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}
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material.SetColor("_BASE_COLOR", vectorProperty * floatProperty);
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}
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if (description.TryGetProperty("emission", out floatProperty) && floatProperty > 0.0f)
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{
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remapPropertyColorOrTexture3DsMax(description, material, "emission_color", "_EMISSION_COLOR",
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floatProperty);
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}
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remapPropertyFloatOrTexture3DsMax(description, material, "metalness", "_METALNESS");
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description.TryGetProperty("specular", out float specularFactor);
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remapPropertyColorOrTexture3DsMax(description, material, "specular_color", "_SPECULAR_COLOR",
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specularFactor);
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remapPropertyFloatOrTexture3DsMax(description, material, "specular_roughness", "_SPECULAR_ROUGHNESS");
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remapPropertyFloatOrTexture3DsMax(description, material, "specular_IOR", "_SPECULAR_IOR");
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remapPropertyTexture(description, material, "normal_camera", "_NORMAL_MAP");
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}
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static void SetMaterialTextureProperty(string propertyName, Material material,
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TexturePropertyDescription textureProperty)
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{
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material.SetTexture(propertyName, textureProperty.texture);
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material.SetTextureOffset(propertyName, textureProperty.offset);
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material.SetTextureScale(propertyName, textureProperty.scale);
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}
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static void remapPropertyFloat(MaterialDescription description, Material material, string inPropName,
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string outPropName)
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{
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if (description.TryGetProperty(inPropName, out float floatProperty))
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{
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material.SetFloat(outPropName, floatProperty);
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}
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}
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static void remapPropertyTexture(MaterialDescription description, Material material, string inPropName,
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string outPropName)
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{
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if (description.TryGetProperty(inPropName, out TexturePropertyDescription textureProperty))
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{
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material.SetTexture(outPropName, textureProperty.texture);
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}
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}
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static void remapPropertyColorOrTexture3DsMax(MaterialDescription description, Material material,
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string inPropName, string outPropName, float multiplier = 1.0f)
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{
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if (description.TryGetProperty(inPropName + ".shader", out TexturePropertyDescription textureProperty))
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{
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material.SetTexture(outPropName + "_MAP", textureProperty.texture);
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material.SetColor(outPropName, Color.white * multiplier);
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}
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else
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{
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description.TryGetProperty(inPropName, out Vector4 vectorProperty);
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material.SetColor(outPropName, vectorProperty * multiplier);
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}
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}
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static void remapPropertyFloatOrTexture3DsMax(MaterialDescription description, Material material,
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string inPropName, string outPropName)
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{
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if (description.TryGetProperty(inPropName, out TexturePropertyDescription textureProperty))
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{
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material.SetTexture(outPropName + "_MAP", textureProperty.texture);
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material.SetFloat(outPropName, 1.0f);
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}
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else
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{
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description.TryGetProperty(inPropName, out float floatProperty);
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material.SetFloat(outPropName, floatProperty);
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}
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}
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static void remapPropertyColorOrTexture(MaterialDescription description, Material material, string inPropName,
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string outPropName, float multiplier = 1.0f)
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{
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if (description.TryGetProperty(inPropName, out TexturePropertyDescription textureProperty))
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{
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material.SetTexture(outPropName + "_MAP", textureProperty.texture);
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material.SetColor(outPropName, Color.white * multiplier);
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}
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else
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{
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description.TryGetProperty(inPropName, out Vector4 vectorProperty);
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material.SetColor(outPropName, vectorProperty * multiplier);
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}
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}
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static void remapPropertyFloatOrTexture(MaterialDescription description, Material material, string inPropName,
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string outPropName)
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{
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if (description.TryGetProperty(inPropName, out TexturePropertyDescription textureProperty))
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{
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material.SetTexture(outPropName + "_MAP", textureProperty.texture);
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material.SetFloat(outPropName, 1.0f);
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}
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else
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{
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description.TryGetProperty(inPropName, out float floatProperty);
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material.SetFloat(outPropName, floatProperty);
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}
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}
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}
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}
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