private static async Task ConstructMaterialAsync(this GltfObject gltfObject, GltfMaterial gltfMaterial, int materialId)
{
if (gltfObject.UseBackgroundThread)
{
await Update;
}
Material material = await CreateMRTKShaderMaterial(gltfObject, gltfMaterial, materialId);
if (material == null)
{
Debug.LogWarning("The Mixed Reality Toolkit/Standard Shader was not found. Falling back to Standard Shader");
material = await CreateStandardShaderMaterial(gltfObject, gltfMaterial, materialId);
}
if (material == null)
{
Debug.LogWarning("The Standard Shader was not found. Failed to create material for glTF object");
}
else
{
gltfMaterial.Material = material;
}
if (gltfObject.UseBackgroundThread)
{
await BackgroundThread;
}
}
static void LoadCommonParams(this Material self, GltfMaterial material, List <Texture> textures)
{
var pbr = material.pbrMetallicRoughness;
if (pbr != null)
{
if (pbr.baseColorFactor != null)
{
self.BaseColorFactor = LinearColor.FromLiner(
pbr.baseColorFactor[0],
pbr.baseColorFactor[1],
pbr.baseColorFactor[2],
pbr.baseColorFactor[3]);
}
var baseColorTexture = pbr.baseColorTexture;
if (baseColorTexture != null)
{
self.BaseColorTexture = new TextureInfo(textures[baseColorTexture.index]);
}
}
self.AlphaMode = (VrmLib.AlphaModeType)material.alphaMode;
self.AlphaCutoff = material.alphaCutoff;
self.DoubleSided = material.doubleSided;
}
private Material readMaterial(int index)
{
if (_materialMap.TryGetValue(index, out Material material))
{
return(material);
}
GltfMaterial gltfMaterial = _root.Materials[index];
material = new Material(gltfMaterial.Name);
_materialMap.Add(index, material);
//TODO: implement gltf material reader
if (gltfMaterial.PbrMetallicRoughness != null)
{
byte r = (byte)(gltfMaterial.PbrMetallicRoughness.BaseColorFactor[0] * 255);
byte g = (byte)(gltfMaterial.PbrMetallicRoughness.BaseColorFactor[1] * 255);
byte b = (byte)(gltfMaterial.PbrMetallicRoughness.BaseColorFactor[2] * 255);
byte a = (byte)(gltfMaterial.PbrMetallicRoughness.BaseColorFactor[3] * 255);
material.AmbientColor = new Color(r, g, b, a);
material.DiffuseColor = new Color(r, g, b, a);
material.SpecularColor = new Color(r, g, b, a);
}
return(material);
}
public static UnlitMaterial UnlitFromGltf(GltfMaterial material, List <Texture> textures)
{
var unlit = new UnlitMaterial(material.name);
unlit.LoadCommonParams(material, textures);
return(unlit);
}
public static Material FromGltf(this GltfMaterial x, List <Texture> textures)
{
return(x.IsUnlit()
? (Material)UnlitFromGltf(x, textures)
: (Material)PBRFromGltf(x, textures)
);
}
static GltfImage GetNormalImage(GltfSerialization.GltfStorage storage, GltfMaterial m)
{
if (m.normalTexture == null)
{
return(null);
}
return(GetTexture(storage, m.normalTexture.index));
}
public static PBRMaterial PBRFromGltf(GltfMaterial material, List <Texture> textures)
{
var self = new PBRMaterial(material.name);
self.LoadCommonParams(material, textures);
//
// pbr
//
var pbr = material.pbrMetallicRoughness;
// metallic roughness
self.MetallicFactor = pbr.metallicFactor;
self.RoughnessFactor = pbr.roughnessFactor;
var metallicRoughnessTexture = pbr.metallicRoughnessTexture;
if (metallicRoughnessTexture != null)
{
self.MetallicRoughnessTexture = textures[metallicRoughnessTexture.index];
}
//
// emissive
//
if (material.emissiveFactor != null)
{
self.EmissiveFactor = new Vector3(
material.emissiveFactor[0], material.emissiveFactor[1], material.emissiveFactor[2]);
}
var emissiveTexture = material.emissiveTexture;
if (emissiveTexture != null)
{
self.EmissiveTexture = textures[emissiveTexture.index];
}
//
// normal
//
var normalTexture = material.normalTexture;
if (normalTexture != null)
{
self.NormalTexture = textures[normalTexture.index];
}
//
// occlusion
//
var occlusionTexture = material.occlusionTexture;
if (occlusionTexture != null)
{
self.OcclusionTexture = textures[occlusionTexture.index];
}
return(self);
}
static GltfImage GetColorImage(GltfSerialization.GltfStorage storage, GltfMaterial m)
{
if (m.pbrMetallicRoughness == null)
{
return(null);
}
if (m.pbrMetallicRoughness.baseColorTexture == null)
{
return(null);
}
return(GetTexture(storage, m.pbrMetallicRoughness.baseColorTexture.index));
}
/// Glb interface. bin is binary chunk
public GltfStorage(FileInfo path, ArraySegment <byte> json, Memory <byte> bin)
{
OriginalJson = json;
Gltf = Generated.GltfDeserializer.Deserialize(json.ParseAsJson());
Path = path;
Json = new Utf8String(json);
if (!bin.IsEmpty)
{
// glb
MemoryMarshal.TryGetArray(bin, out ArraySegment <byte> segment);
Buffers.Add(new SimpleBuffer(segment));
}
else
{
// gltf
var baseDir = path.Directory.FullName;
Buffers.AddRange(Gltf.buffers.Select(x => new UriByteBuffer(baseDir, x.uri)));
}
if (Gltf.extensions != null && Gltf.extensions.VRM != null)
{
// VRM
if (Gltf.extensions.VRM.humanoid != null)
{
Gltf.extensions.VRM.humanoid.humanBones =
Gltf.extensions.VRM.humanoid.humanBones.OrderBy(x => x.bone).ToList();
}
}
if (!Gltf.materials.Any())
{
// default material
Gltf.materials.Add(GltfMaterial.CreateDefault("__default__"));
}
}
private static async Task ConstructMaterialAsync(this GltfObject gltfObject, GltfMaterial gltfMaterial, int materialId)
{
if (Application.isPlaying)
{
await Update;
}
Shader shader = Shader.Find("Standard");
if (shader == null)
{
Debug.LogWarning("No Standard shader found. Falling back to Legacy Diffuse");
shader = Shader.Find("Legacy Shaders/Diffuse");
}
var material = new Material(shader)
{
name = string.IsNullOrEmpty(gltfMaterial.name) ? $"Gltf Material {materialId}" : gltfMaterial.name
};
if (gltfMaterial.pbrMetallicRoughness.baseColorTexture.index >= 0)
{
material.mainTexture = gltfObject.images[gltfMaterial.pbrMetallicRoughness.baseColorTexture.index].Texture;
}
material.color = gltfMaterial.pbrMetallicRoughness.baseColorFactor.GetColorValue();
if (shader.name == "Standard")
{
if (gltfMaterial.alphaMode == "MASK")
{
material.SetInt(SrcBlend, (int)BlendMode.One);
material.SetInt(DstBlend, (int)BlendMode.Zero);
material.SetInt(ZWrite, 1);
material.SetInt(Mode, 3);
material.SetOverrideTag("RenderType", "Cutout");
material.EnableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 2450;
}
else if (gltfMaterial.alphaMode == "BLEND")
{
material.SetInt(SrcBlend, (int)BlendMode.One);
material.SetInt(DstBlend, (int)BlendMode.OneMinusSrcAlpha);
material.SetInt(ZWrite, 0);
material.SetInt(Mode, 3);
material.SetOverrideTag("RenderType", "Transparency");
material.DisableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.EnableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 3000;
}
}
if (gltfMaterial.emissiveTexture.index >= 0 && material.HasProperty("_EmissionMap"))
{
material.EnableKeyword("_EmissionMap");
material.EnableKeyword("_EMISSION");
material.SetTexture(EmissionMap, gltfObject.images[gltfMaterial.emissiveTexture.index].Texture);
material.SetColor(EmissionColor, gltfMaterial.emissiveFactor.GetColorValue());
}
if (gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index >= 0 && material.HasProperty("_MetallicGlossMap"))
{
var texture = gltfObject.images[gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index].Texture;
if (texture.isReadable)
{
var pixels = texture.GetPixels();
if (Application.isPlaying)
{
await BackgroundThread;
}
var pixelCache = new Color[pixels.Length];
for (int c = 0; c < pixels.Length; c++)
{
// Unity only looks for metal in R channel, and smoothness in A.
pixelCache[c].r = pixels[c].g;
pixelCache[c].g = 0f;
pixelCache[c].b = 0f;
pixelCache[c].a = pixels[c].b;
}
if (Application.isPlaying)
{
await Update;
}
texture.SetPixels(pixelCache);
texture.Apply();
material.SetTexture(MetallicGlossMap, gltfObject.images[gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index].Texture);
}
material.SetFloat(Glossiness, Mathf.Abs((float)gltfMaterial.pbrMetallicRoughness.roughnessFactor - 1f));
material.SetFloat(Metallic, (float)gltfMaterial.pbrMetallicRoughness.metallicFactor);
material.EnableKeyword("_MetallicGlossMap");
material.EnableKeyword("_METALLICGLOSSMAP");
}
if (gltfMaterial.normalTexture.index >= 0 && material.HasProperty("_BumpMap"))
{
material.SetTexture(BumpMap, gltfObject.images[gltfMaterial.normalTexture.index].Texture);
material.EnableKeyword("_BumpMap");
}
material.globalIlluminationFlags = MaterialGlobalIlluminationFlags.RealtimeEmissive;
gltfMaterial.Material = material;
if (Application.isPlaying)
{
await BackgroundThread;
}
}
private static async Task <Material> CreateStandardShaderMaterial(GltfObject gltfObject, GltfMaterial gltfMaterial, int materialId)
{
var shader = Shader.Find("Standard");
if (shader == null)
{
return(null);
}
var material = new Material(shader)
{
name = string.IsNullOrEmpty(gltfMaterial.name) ? $"glTF Material {materialId}" : gltfMaterial.name
};
if (gltfMaterial.pbrMetallicRoughness.baseColorTexture.index >= 0)
{
material.mainTexture = gltfObject.images[gltfMaterial.pbrMetallicRoughness.baseColorTexture.index].Texture;
}
material.color = gltfMaterial.pbrMetallicRoughness.baseColorFactor.GetColorValue();
if (gltfMaterial.alphaMode == "MASK")
{
material.SetInt(SrcBlendId, (int)BlendMode.One);
material.SetInt(DstBlendId, (int)BlendMode.Zero);
material.SetInt(ZWriteId, 1);
material.SetInt(ModeId, 3);
material.SetOverrideTag("RenderType", "Cutout");
material.EnableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 2450;
}
else if (gltfMaterial.alphaMode == "BLEND")
{
material.SetInt(SrcBlendId, (int)BlendMode.One);
material.SetInt(DstBlendId, (int)BlendMode.OneMinusSrcAlpha);
material.SetInt(ZWriteId, 0);
material.SetInt(ModeId, 3);
material.SetOverrideTag("RenderType", "Transparency");
material.DisableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.EnableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 3000;
}
if (gltfMaterial.emissiveTexture.index >= 0)
{
material.EnableKeyword("_EmissionMap");
material.EnableKeyword("_EMISSION");
material.SetTexture(EmissionMapId, gltfObject.images[gltfMaterial.emissiveTexture.index].Texture);
material.SetColor(EmissionColorId, gltfMaterial.emissiveFactor.GetColorValue());
}
if (gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index >= 0)
{
var texture = gltfObject.images[gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index].Texture;
if (texture.isReadable)
{
var pixels = texture.GetPixels();
if (gltfObject.UseBackgroundThread)
{
await BackgroundThread;
}
var pixelCache = new Color[pixels.Length];
for (int c = 0; c < pixels.Length; c++)
{
// Unity only looks for metal in R channel, and smoothness in A.
pixelCache[c].r = pixels[c].g;
pixelCache[c].g = 0f;
pixelCache[c].b = 0f;
pixelCache[c].a = pixels[c].b;
}
if (gltfObject.UseBackgroundThread)
{
await Update;
}
texture.SetPixels(pixelCache);
texture.Apply();
material.SetTexture(MetallicGlossMapId, texture);
}
material.SetFloat(GlossinessId, Mathf.Abs((float)gltfMaterial.pbrMetallicRoughness.roughnessFactor - 1f));
material.SetFloat(MetallicId, (float)gltfMaterial.pbrMetallicRoughness.metallicFactor);
material.EnableKeyword("_MetallicGlossMap");
material.EnableKeyword("_METALLICGLOSSMAP");
}
if (gltfMaterial.normalTexture.index >= 0)
{
material.SetTexture(BumpMapId, gltfObject.images[gltfMaterial.normalTexture.index].Texture);
material.EnableKeyword("_BumpMap");
}
material.globalIlluminationFlags = MaterialGlobalIlluminationFlags.RealtimeEmissive;
return(material);
}
private static async Task <Material> CreateMRTKShaderMaterial(GltfObject gltfObject, GltfMaterial gltfMaterial, int materialId)
{
var shader = Shader.Find("Mixed Reality Toolkit/Standard");
if (shader == null)
{
return(null);
}
var material = new Material(shader)
{
name = string.IsNullOrEmpty(gltfMaterial.name) ? $"glTF Material {materialId}" : gltfMaterial.name
};
if (gltfMaterial.pbrMetallicRoughness.baseColorTexture.index >= 0)
{
material.mainTexture = gltfObject.images[gltfMaterial.pbrMetallicRoughness.baseColorTexture.index].Texture;
}
material.color = gltfMaterial.pbrMetallicRoughness.baseColorFactor.GetColorValue();
if (gltfMaterial.alphaMode == "MASK")
{
material.SetInt(SrcBlendId, (int)BlendMode.One);
material.SetInt(DstBlendId, (int)BlendMode.Zero);
material.SetInt(ZWriteId, 1);
material.SetInt(ModeId, 3);
material.SetOverrideTag("RenderType", "Cutout");
material.EnableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 2450;
}
else if (gltfMaterial.alphaMode == "BLEND")
{
material.SetInt(SrcBlendId, (int)BlendMode.One);
material.SetInt(DstBlendId, (int)BlendMode.OneMinusSrcAlpha);
material.SetInt(ZWriteId, 0);
material.SetInt(ModeId, 3);
material.SetOverrideTag("RenderType", "Transparency");
material.DisableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.EnableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 3000;
}
if (gltfMaterial.emissiveTexture.index >= 0 && material.HasProperty("_EmissionMap"))
{
material.EnableKeyword("_EMISSION");
material.SetColor(EmissiveColorId, gltfMaterial.emissiveFactor.GetColorValue());
}
if (gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index >= 0)
{
var texture = gltfObject.images[gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index].Texture;
Texture2D occlusionTexture = null;
if (gltfMaterial.occlusionTexture.index >= 0)
{
occlusionTexture = gltfObject.images[gltfMaterial.occlusionTexture.index].Texture;
}
if (texture.isReadable)
{
var pixels = texture.GetPixels();
Color[] occlusionPixels = null;
if (occlusionTexture != null &&
occlusionTexture.isReadable)
{
occlusionPixels = occlusionTexture.GetPixels();
}
if (gltfObject.UseBackgroundThread)
{
await BackgroundThread;
}
var pixelCache = new Color[pixels.Length];
for (int c = 0; c < pixels.Length; c++)
{
pixelCache[c].r = pixels[c].b; // MRTK standard shader metallic value, glTF metallic value
pixelCache[c].g = occlusionPixels?[c].r ?? 1.0f; // MRTK standard shader occlusion value, glTF occlusion value if available
pixelCache[c].b = 0f; // MRTK standard shader emission value
pixelCache[c].a = (1.0f - pixels[c].g); // MRTK standard shader smoothness value, invert of glTF roughness value
}
if (gltfObject.UseBackgroundThread)
{
await Update;
}
texture.SetPixels(pixelCache);
texture.Apply();
material.SetTexture(ChannelMapId, texture);
material.EnableKeyword("_CHANNEL_MAP");
}
else
{
material.DisableKeyword("_CHANNEL_MAP");
}
material.SetFloat(SmoothnessId, Mathf.Abs((float)gltfMaterial.pbrMetallicRoughness.roughnessFactor - 1f));
material.SetFloat(MetallicId, (float)gltfMaterial.pbrMetallicRoughness.metallicFactor);
}
if (gltfMaterial.normalTexture.index >= 0)
{
material.SetTexture(NormalMapId, gltfObject.images[gltfMaterial.normalTexture.index].Texture);
material.SetFloat(NormalMapScaleId, (float)gltfMaterial.normalTexture.scale);
material.EnableKeyword("_NORMAL_MAP");
}
if (gltfMaterial.doubleSided)
{
material.SetFloat(CullModeId, (float)UnityEngine.Rendering.CullMode.Off);
}
material.globalIlluminationFlags = MaterialGlobalIlluminationFlags.RealtimeEmissive;
return(material);
}
private static void ConstructMaterial(this GltfObject gltfObject, GltfMaterial gltfMaterial, int materialId)
{
Shader shader = Shader.Find("Standard");
if (shader == null)
{
Debug.LogWarning("No Standard shader found. Falling back to Legacy Diffuse");
shader = Shader.Find("Legacy Shaders/Diffuse");
}
var material = new Material(shader)
{
name = string.IsNullOrEmpty(gltfMaterial.name) ? $"Gltf Material {materialId}" : gltfMaterial.name
};
if (gltfMaterial.pbrMetallicRoughness.baseColorTexture.index >= 0)
{
material.mainTexture = gltfObject.images[gltfMaterial.pbrMetallicRoughness.baseColorTexture.index].Texture;
}
material.color = gltfMaterial.pbrMetallicRoughness.baseColorFactor.GetColorValue();
if (shader.name == "Standard")
{
if (gltfMaterial.alphaMode == "MASK")
{
material.SetInt("_SrcBlend", (int)BlendMode.One);
material.SetInt("_DstBlend", (int)BlendMode.Zero);
material.SetInt("_ZWrite", 1);
material.SetInt("_Mode", 3);
material.SetOverrideTag("RenderType", "Cutout");
material.EnableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 2450;
}
else if (gltfMaterial.alphaMode == "BLEND")
{
material.SetInt("_SrcBlend", (int)BlendMode.One);
material.SetInt("_DstBlend", (int)BlendMode.OneMinusSrcAlpha);
material.SetInt("_ZWrite", 0);
material.SetInt("_Mode", 3);
material.SetOverrideTag("RenderType", "Transparency");
material.DisableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.EnableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 3000;
}
}
if (material.HasProperty("_MetallicGlossMap"))
{
// TODO if using extension handle it appropriately.
if (gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index >= 0)
{
var texture = gltfObject.images[gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index].Texture;
var pixels = texture.GetPixels();
var newPixels = new Color[pixels.Length];
for (int c = 0; c < pixels.Length; c++)
{
// Unity only looks for metal in R channel, and smoothness in A.
newPixels[c] = new Color(pixels[c].g, 0f, 0f, pixels[c].b);
}
texture.SetPixels(newPixels);
texture.Apply();
material.SetTexture("_MetallicGlossMap", gltfObject.images[gltfMaterial.pbrMetallicRoughness.metallicRoughnessTexture.index].Texture);
}
material.SetFloat("_Glossiness", Mathf.Abs((float)gltfMaterial.pbrMetallicRoughness.roughnessFactor - 1f));
material.SetFloat("_Metallic", (float)gltfMaterial.pbrMetallicRoughness.metallicFactor);
material.EnableKeyword("_MetallicGlossMap");
}
if (gltfMaterial.normalTexture.index >= 0 && material.HasProperty("_BumpMap"))
{
material.SetTexture("_BumpMap", gltfObject.images[gltfMaterial.normalTexture.index].Texture);
material.EnableKeyword("_BumpMap");
material.EnableKeyword("_NORMALMAP");
}
if (material.HasProperty("_EmissionMap") && material.HasProperty("_EMISSION"))
{
var enable = false;
if (gltfMaterial.emissiveTexture.index >= 0)
{
material.SetTexture("_EmissionMap", gltfObject.images[gltfMaterial.emissiveTexture.index].Texture);
material.EnableKeyword("_EmissionMap");
enable = true;
}
var emissiveColor = gltfMaterial.emissiveFactor.GetColorValue();
if (gltfMaterial.emissiveFactor != null && emissiveColor != Color.black)
{
material.SetColor("_EmissionColor", emissiveColor);
enable = true;
}
if (enable)
{
material.EnableKeyword("_EMISSION");
}
}
gltfMaterial.Material = material;
}
