/// <summary>
/// glTF 全体で使うテクスチャーを列挙する
/// </summary>
private static IEnumerable <(SubAssetKey, TextureDescriptor)> EnumerateAllTextures(GltfData data)
{
if (!UniGLTF.Extensions.VRMC_vrm.GltfDeserializer.TryGet(data.GLTF.extensions, out UniGLTF.Extensions.VRMC_vrm.VRMC_vrm vrm))
{
throw new System.Exception("not vrm");
}
// Textures referenced by Materials.
for (var materialIdx = 0; materialIdx < data.GLTF.materials.Count; ++materialIdx)
{
var m = data.GLTF.materials[materialIdx];
if (UniGLTF.Extensions.VRMC_materials_mtoon.GltfDeserializer.TryGet(m.extensions, out var mToon))
{
foreach (var(_, tex) in Vrm10MToonTextureImporter.EnumerateAllTextures(data, m, mToon))
{
yield return(tex);
}
}
else
{
// Fallback to glTF PBR & glTF Unlit
foreach (var tex in GltfPbrTextureImporter.EnumerateAllTextures(data, materialIdx))
{
yield return(tex);
}
}
}
// Thumbnail Texture referenced by VRM Meta.
if (TryGetMetaThumbnailTextureImportParam(data, vrm, out (SubAssetKey key, TextureDescriptor)thumbnail))
{
yield return(thumbnail);
}
}
private static IEnumerable <(SubAssetKey, TextureDescriptor)> EnumerateAllTextures(GltfData data, glTF_VRM_extensions vrm)
{
// Materials
for (var materialIdx = 0; materialIdx < data.GLTF.materials.Count; ++materialIdx)
{
var material = data.GLTF.materials[materialIdx];
var vrmMaterial = vrm.materialProperties[materialIdx];
if (vrmMaterial.shader == VRM.glTF_VRM_Material.VRM_USE_GLTFSHADER)
{
// Unlit or PBR
foreach (var kv in GltfPbrTextureImporter.EnumerateAllTextures(data, materialIdx))
{
yield return(kv);
}
}
else
{
// MToon など任意の shader
foreach (var kv in VRMMToonTextureImporter.EnumerateAllTextures(data, vrm, materialIdx))
{
yield return(kv);
}
}
}
// Thumbnail
if (TryGetThumbnailTexture(data, vrm, out var thumbnail))
{
yield return(thumbnail);
}
}
private static bool TryGetNormalTexture(GltfData data, glTFMaterial src, out (SubAssetKey, TextureDescriptor) pair)
{
try
{
pair = GltfPbrTextureImporter.NormalTexture(data, src);
return(true);
}
catch (NullReferenceException)
{
pair = default;
return(false);
}
catch (ArgumentOutOfRangeException)
{
pair = default;
return(false);
}
}
