AnySceneImporter: recognize USD files.

Assimp seems to support those since 5.4.3, so we have a plugin to direct
these to.

doc/changelog.dox

@@ -967,7 +967,7 @@ See also:
     in @relativeref{Trade,AnyImageConverter}
 -   Recognizing WebP files in @relativeref{Trade,AnyImageConverter}
 -   Recognizing glTF files in @relativeref{Trade,AnySceneConverter}
--   Recognizing 3MF and VRM files in @relativeref{Trade,AnySceneImporter}
+-   Recognizing 3MF, VRM and USD files in @relativeref{Trade,AnySceneImporter}
 -   Recognizing OpenVBD files in @relativeref{Trade,AnyImageImporter} and
     @relativeref{Trade,AnyImageConverter}
 -   @ref Audio::AnyImporter "AnyAudioImporter",

src/MagnumPlugins/AnySceneImporter/AnySceneImporter.cpp

@@ -166,6 +166,12 @@ void AnySceneImporter::doOpenFile(const Containers::StringView filename) {
             /** @todo isn't *.scn also too generic? */
             normalized.hasSuffix(".scn"_s))
         plugin = "TrueSpaceImporter"_s;
+    /* https://en.wikipedia.org/wiki/Universal_Scene_Description */
+    else if(normalized.hasSuffix(".usd"_s) ||
+            normalized.hasSuffix(".usda"_s) ||
+            normalized.hasSuffix(".usdc"_s) ||
+            normalized.hasSuffix(".usdz"_s))
+        plugin = "UsdImporter"_s;
     else if(normalized.hasSuffix(".3d"_s))
         plugin = "UnrealImporter"_s;
     else if(normalized.hasSuffix(".smd"_s) ||

src/MagnumPlugins/AnySceneImporter/AnySceneImporter.h

@@ -96,6 +96,9 @@ tries to open the file with it. Supported formats:
     `StlImporter`
 -   TrueSpace (`*.cob`, `*.scn`), loaded with any plugin that provides
     `TrueSpaceImporter`
+-   [Universal Scene Description (USD)](https://en.wikipedia.org/wiki/Universal_Scene_Description)
+    (`*.usd`, `*.usda`, `*.usdc`, `*.usdz`), loaded with any plugin that
+    provides `UsdImporter`
 -   Unreal (`*.3d`), loaded with any plugin that provides `UnrealImporter`
 -   Valve Model (`*.smd`, `*.vta`), loaded with any plugin that provides
     `ValveImporter`

src/MagnumPlugins/AnySceneImporter/Test/AnySceneImporterTest.cpp

@@ -153,6 +153,10 @@ const struct {
     {"STL", "robot.stl", "StlImporter"},
     {"TrueSpace COB", "huh.cob", "TrueSpaceImporter"},
     {"TrueSpace SCN", "huh.scn", "TrueSpaceImporter"},
+    {"USD", "model.usd", "UsdImporter"},
+    {"USD ASCII", "model.usda", "UsdImporter"},
+    {"USD binary", "model.usdc", "UsdImporter"},
+    {"USD zipped", "model.usdz", "UsdImporter"},
     {"Unreal", "tournament.3d", "UnrealImporter"},
     {"Valve Model SMD", "hl3.smd", "ValveImporter"},
     {"Valve Model VTA", "hl3.vta", "ValveImporter"},