/// <summary>
/// glTF 全体で使うテクスチャーを列挙。
/// </summary>
private static IEnumerable <(SubAssetKey, TextureDescriptor)> EnumerateAllTextures(GltfData data)
{
for (int i = 0; i < data.GLTF.materials.Count; ++i)
{
foreach (var kv in GltfPbrTextureImporter.EnumerateAllTextures(data, i))
{
yield return(kv);
}
}
}
public static bool TryCreateParam(GltfData data, int i, out MaterialDescriptor matDesc)
{
if (i < 0 || i >= data.GLTF.materials.Count)
{
matDesc = default;
return(false);
}
var textureSlots = new Dictionary <string, TextureDescriptor>();
var floatValues = new Dictionary <string, float>();
var colors = new Dictionary <string, Color>();
var vectors = new Dictionary <string, Vector4>();
var actions = new List <Action <Material> >();
var src = data.GLTF.materials[i];
var standardTexDesc = default(TextureDescriptor);
if (src.pbrMetallicRoughness != null || src.occlusionTexture != null)
{
if (src.pbrMetallicRoughness.metallicRoughnessTexture != null || src.occlusionTexture != null)
{
SubAssetKey key;
(key, standardTexDesc) = GltfPbrTextureImporter.StandardTexture(data, src);
}
if (src.pbrMetallicRoughness.baseColorFactor != null && src.pbrMetallicRoughness.baseColorFactor.Length == 4)
{
// from _Color !
colors.Add("_BaseColor",
src.pbrMetallicRoughness.baseColorFactor.ToColor4(ColorSpace.Linear, ColorSpace.sRGB)
);
}
if (src.pbrMetallicRoughness.baseColorTexture != null && src.pbrMetallicRoughness.baseColorTexture.index != -1)
{
var(key, textureParam) = GltfPbrTextureImporter.BaseColorTexture(data, src);
// from _MainTex !
textureSlots.Add("_BaseMap", textureParam);
}
if (src.pbrMetallicRoughness.metallicRoughnessTexture != null && src.pbrMetallicRoughness.metallicRoughnessTexture.index != -1)
{
actions.Add(material => material.EnableKeyword("_METALLICGLOSSMAP"));
textureSlots.Add("_MetallicGlossMap", standardTexDesc);
// Set 1.0f as hard-coded. See: https://github.com/dwango/UniVRM/issues/212.
floatValues.Add("_Metallic", 1.0f);
floatValues.Add("_GlossMapScale", 1.0f);
// default value is 0.5 !
floatValues.Add("_Smoothness", 1.0f);
}
else
{
floatValues.Add("_Metallic", src.pbrMetallicRoughness.metallicFactor);
// from _Glossiness !
floatValues.Add("_Smoothness", 1.0f - src.pbrMetallicRoughness.roughnessFactor);
}
}
if (src.normalTexture != null && src.normalTexture.index != -1)
{
actions.Add(material => material.EnableKeyword("_NORMALMAP"));
var(key, textureParam) = GltfPbrTextureImporter.NormalTexture(data, src);
textureSlots.Add("_BumpMap", textureParam);
floatValues.Add("_BumpScale", src.normalTexture.scale);
}
if (src.occlusionTexture != null && src.occlusionTexture.index != -1)
{
textureSlots.Add("_OcclusionMap", standardTexDesc);
floatValues.Add("_OcclusionStrength", src.occlusionTexture.strength);
}
if (src.emissiveFactor != null ||
(src.emissiveTexture != null && src.emissiveTexture.index != -1))
{
actions.Add(material =>
{
material.EnableKeyword("_EMISSION");
material.globalIlluminationFlags &= ~MaterialGlobalIlluminationFlags.EmissiveIsBlack;
});
if (src.emissiveFactor != null && src.emissiveFactor.Length == 3)
{
var emissiveFactor = src.emissiveFactor.ToColor3(ColorSpace.Linear, ColorSpace.Linear);
if (UniGLTF.glTF_KHR_materials_emissive_strength.TryGet(src.extensions,
out UniGLTF.glTF_KHR_materials_emissive_strength emissiveStrength))
{
emissiveFactor *= emissiveStrength.emissiveStrength;
}
else if (UniGLTF.Extensions.VRMC_materials_hdr_emissiveMultiplier.GltfDeserializer.TryGet(src.extensions,
out UniGLTF.Extensions.VRMC_materials_hdr_emissiveMultiplier.VRMC_materials_hdr_emissiveMultiplier ex))
{
emissiveFactor *= ex.EmissiveMultiplier.Value;
}
colors.Add("_EmissionColor", emissiveFactor);
}
if (src.emissiveTexture != null && src.emissiveTexture.index != -1)
{
var(key, textureParam) = GltfPbrTextureImporter.EmissiveTexture(data, src);
textureSlots.Add("_EmissionMap", textureParam);
}
}
actions.Add(material =>
{
BlendMode blendMode = BlendMode.Opaque;
// https://forum.unity.com/threads/standard-material-shader-ignoring-setfloat-property-_mode.344557/#post-2229980
switch (src.alphaMode)
{
case "BLEND":
blendMode = BlendMode.Fade;
material.SetOverrideTag("RenderType", "Transparent");
material.SetInt(SrcBlend, (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
material.SetInt(DstBlend, (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
material.SetInt(ZWrite, 0);
material.DisableKeyword("_ALPHATEST_ON");
material.EnableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 3000;
break;
case "MASK":
blendMode = BlendMode.Cutout;
material.SetOverrideTag("RenderType", "TransparentCutout");
material.SetInt(SrcBlend, (int)UnityEngine.Rendering.BlendMode.One);
material.SetInt(DstBlend, (int)UnityEngine.Rendering.BlendMode.Zero);
material.SetInt(ZWrite, 1);
material.SetFloat(Cutoff, src.alphaCutoff);
material.EnableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 2450;
break;
default: // OPAQUE
blendMode = BlendMode.Opaque;
material.SetOverrideTag("RenderType", "");
material.SetInt(SrcBlend, (int)UnityEngine.Rendering.BlendMode.One);
material.SetInt(DstBlend, (int)UnityEngine.Rendering.BlendMode.Zero);
material.SetInt(ZWrite, 1);
material.DisableKeyword("_ALPHATEST_ON");
material.DisableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = -1;
break;
}
material.SetFloat("_Mode", (float)blendMode);
});
matDesc = new MaterialDescriptor(
GltfMaterialDescriptorGenerator.GetMaterialName(i, src),
ShaderName,
null,
textureSlots,
floatValues,
colors,
vectors,
actions);
return(true);
}
