public virtual glTFMaterial ExportMaterial(Material m, TextureExportManager textureManager)
{
var material = CreateMaterial(m);
// common params
material.name = m.name;
Export_Color(m, textureManager, material);
Export_Metallic(m, textureManager, material);
Export_Normal(m, textureManager, material);
Export_Occlusion(m, textureManager, material);
Export_Emission(m, textureManager, material);
if ((material.pbrMetallicRoughness != null) &&
(material.pbrMetallicRoughness.baseColorFactor == null) &&
(material.pbrMetallicRoughness.baseColorTexture == null) &&
(material.pbrMetallicRoughness.metallicFactor == -1.0f) &&
(material.pbrMetallicRoughness.roughnessFactor == -1.0f) &&
(material.pbrMetallicRoughness.baseColorFactor == null) &&
(material.pbrMetallicRoughness.extensions == null) &&
(material.pbrMetallicRoughness.extras == null))
{
material.pbrMetallicRoughness = null;
}
return(material);
}
static void Export_Emission(Material m, TextureExportManager textureManager, glTFMaterial material)
{
if (m.IsKeywordEnabled("_EMISSION") == false)
{
return;
}
if (m.HasProperty("_EmissionColor"))
{
var color = m.GetColor("_EmissionColor");
if (color.maxColorComponent > 1)
{
color /= color.maxColorComponent;
}
material.emissiveFactor = new float[] { color.r, color.g, color.b };
}
if (m.HasProperty("_EmissionMap"))
{
var index = textureManager.CopyAndGetIndex(m.GetTexture("_EmissionMap"), RenderTextureReadWrite.sRGB);
if (index != -1)
{
material.emissiveTexture = new glTFMaterialEmissiveTextureInfo()
{
index = index,
};
}
}
}
protected virtual void FromGameObjectMaterialsAndTextures(glTF gltf, GameObject go, int bufferIndex)
{
Materials = Nodes.SelectMany(x => x.GetSharedMaterials()).Where(x => x != null).Distinct().ToList();
var unityTextures = Materials.SelectMany(x => TextureIO.GetTextures(x)).Where(x => x.Texture != null).Distinct().ToList();
TextureManager = new TextureExportManager(unityTextures.Select(x => x.Texture));
var materialExporter = CreateMaterialExporter();
gltf.materials = Materials.Select(x => materialExporter.ExportMaterial(x, TextureManager)).ToList();
for (int i = 0; i < unityTextures.Count; ++i)
{
var unityTexture = unityTextures[i];
TextureIO.ExportTexture(gltf, bufferIndex, TextureManager.GetExportTexture(i), unityTexture.TextureType);
}
}
static void Export_Metallic(Material m, TextureExportManager textureManager, glTFMaterial material)
{
int index = -1;
if (m.HasProperty("_MetallicGlossMap"))
{
float smoothness = 0.0f;
if (m.HasProperty("_GlossMapScale"))
{
smoothness = m.GetFloat("_GlossMapScale");
}
// Bake smoothness values into a texture.
var converter = new MetallicRoughnessConverter(smoothness);
index = textureManager.ConvertAndGetIndex(m.GetTexture("_MetallicGlossMap"), converter);
if (index != -1)
{
material.pbrMetallicRoughness.metallicRoughnessTexture =
new glTFMaterialMetallicRoughnessTextureInfo()
{
index = index,
};
}
}
if (index != -1)
{
material.pbrMetallicRoughness.metallicFactor = 1.0f;
// Set 1.0f as hard-coded. See: https://github.com/dwango/UniVRM/issues/212.
material.pbrMetallicRoughness.roughnessFactor = 1.0f;
}
else
{
if (m.HasProperty("_Metallic"))
{
material.pbrMetallicRoughness.metallicFactor = m.GetFloat("_Metallic");
}
if (m.HasProperty("_Glossiness"))
{
material.pbrMetallicRoughness.roughnessFactor = 1.0f - m.GetFloat("_Glossiness");
}
}
}
static void Export_Color(Material m, TextureExportManager textureManager, glTFMaterial material)
{
if (m.HasProperty("_Color"))
{
material.pbrMetallicRoughness.baseColorFactor = m.color.linear.ToArray();
}
if (m.HasProperty("_MainTex"))
{
var index = textureManager.CopyAndGetIndex(m.GetTexture("_MainTex"), RenderTextureReadWrite.sRGB);
if (index != -1)
{
material.pbrMetallicRoughness.baseColorTexture = new glTFMaterialBaseColorTextureInfo()
{
index = index,
};
}
}
}
static void Export_Occlusion(Material m, TextureExportManager textureManager, glTFMaterial material)
{
if (m.HasProperty("_OcclusionMap"))
{
var index = textureManager.ConvertAndGetIndex(m.GetTexture("_OcclusionMap"), new OcclusionConverter());
if (index != -1)
{
material.occlusionTexture = new glTFMaterialOcclusionTextureInfo()
{
index = index,
};
}
if (index != -1 && m.HasProperty("_OcclusionStrength"))
{
material.occlusionTexture.strength = m.GetFloat("_OcclusionStrength");
}
}
}
static void Export_Normal(Material m, TextureExportManager textureManager, glTFMaterial material)
{
if (m.HasProperty("_BumpMap"))
{
var index = textureManager.ConvertAndGetIndex(m.GetTexture("_BumpMap"), new NormalConverter());
if (index != -1)
{
material.normalTexture = new glTFMaterialNormalTextureInfo()
{
index = index,
};
}
if (index != -1 && m.HasProperty("_BumpScale"))
{
material.normalTexture.scale = m.GetFloat("_BumpScale");
}
}
}
