sceneconverter: show morph target ID in --info output, if present.

src/Magnum/SceneTools/Implementation/sceneConverterUtilities.h

@@ -122,6 +122,7 @@ bool printInfo(const Debug::Flags useColor, const bool useColor24, const Utility
         std::size_t offset;
         Int stride;
         UnsignedInt arraySize;
+        Int morphTargetId;
         Trade::MeshAttribute name;
         Containers::String customName;
         VertexFormat format;
@@ -541,6 +542,7 @@ bool printInfo(const Debug::Flags useColor, const bool useColor24, const Utility
                     mesh->attributeOffset(k),
                     mesh->attributeStride(k),
                     mesh->attributeArraySize(k),
+                    mesh->attributeMorphTargetId(k),
                     name, Trade::isMeshAttributeCustom(name) ?
                         importer.meshAttributeName(name) : "",
                     mesh->attributeFormat(k),
@@ -1057,6 +1059,9 @@ bool printInfo(const Debug::Flags useColor, const bool useColor24, const Utility
                     << Debug::boldColor(Debug::Color::Default) << ")";
             } else d << Debug::packed << attribute.name;
 
+            if(attribute.morphTargetId != -1)
+                d << Debug::resetColor << Debug::nospace << ", morph target" << attribute.morphTargetId;
+
             d << Debug::color(Debug::Color::Blue) << "@" << Debug::packed << Debug::color(Debug::Color::Cyan) << attribute.format;
             if(attribute.arraySize)
                 d << Debug::nospace << Utility::format("[{}]", attribute.arraySize);

src/Magnum/SceneTools/Test/SceneConverterImplementationTest.cpp

@@ -697,7 +697,8 @@ void SceneConverterImplementationTest::infoMeshes() {
                 Trade::DataFlag::ExternallyOwned, indices,
                 Trade::MeshIndexData{indices},
                 Trade::DataFlag::ExternallyOwned|Trade::DataFlag::Mutable, points, {
-                    Trade::MeshAttributeData{Trade::MeshAttribute::Position, Containers::arrayView(points)}
+                    Trade::MeshAttributeData{Trade::MeshAttribute::Position, Containers::stridedArrayView(points).slice(&Point::base)},
+                    Trade::MeshAttributeData{Trade::MeshAttribute::Position, Containers::stridedArrayView(points).slice(&Point::morphTarget), 66},
                 }};
 
             /* Second is multi-level, with second level being indexed meshlets
@@ -740,7 +741,10 @@ void SceneConverterImplementationTest::infoMeshes() {
         }
 
         UnsignedShort indices[70];
-        Vector3 points[50];
+        struct Point {
+            Vector3 base;
+            Vector2 morphTarget;
+        } points[50];
     } importer;
 
     const char* argv[]{"", data.oneOrAll ? "--info-meshes" : "--info"};

src/Magnum/SceneTools/Test/SceneConverterImplementationTestFiles/info-meshes.txt

@@ -1,6 +1,7 @@
 Mesh 0:
-  Level 0: 50 vertices @ Points (0.6 kB, ExternallyOwned|Mutable)
-    Position @ Vector3, offset 0, stride 12
+  Level 0: 50 vertices @ Points (1.0 kB, ExternallyOwned|Mutable)
+    Position @ Vector3, offset 0, stride 20
+    Position, morph target 66 @ Vector2, offset 12, stride 20
     70 indices @ UnsignedShort, offset 0, stride 2 (0.1 kB, ExternallyOwned)
 Mesh 1: LODs? No, meshlets.
   Level 0: 250 vertices @ Triangles (6.8 kB)
@@ -13,4 +14,4 @@ Mesh 1: LODs? No, meshlets.
     Custom(116:vertexCount) @ UnsignedByte, offset 85725, stride 1
 Mesh 2:
   Level 0: 15 vertices @ Instances (0.0 kB)
-Total mesh data size: 91.4 kB
+Total mesh data size: 91.8 kB