SdfValueTypeName
SdfPropertySpec::GetTypeName() const
{
// See comment in GetValueType().
switch (GetSpecType()) {
case SdfSpecTypeAttribute:
return GetSchema().FindOrCreateType(_GetAttributeValueTypeName());
case SdfSpecTypeRelationship:
return SdfValueTypeName();
default:
TF_CODING_ERROR("Unrecognized subclass of SdfPropertySpec on <%s>",
GetPath().GetText());
return SdfValueTypeName();
}
}
SdfValueTypeName
PxrUsdMayaWriteUtil::GetUsdTypeName(
const MPlug& attrPlug,
const bool translateMayaDoubleToUsdSinglePrecision)
{
// The various types of Maya attributes that can be created are spread
// across a handful of MFn function sets. Some are a straightforward
// translation such as MFnEnumAttributes or MFnMatrixAttributes, but others
// are interesting mixes of function sets. For example, an attribute created
// with addAttr and 'double' as the type results in an MFnNumericAttribute
// while 'double2' as the type results in an MFnTypedAttribute that has
// MFnData::Type kNumeric.
MObject attrObj(attrPlug.attribute());
if (attrObj.isNull()) {
return SdfValueTypeName();
}
if (attrObj.hasFn(MFn::kEnumAttribute)) {
return SdfValueTypeNames->Token;
}
MFnNumericData::Type numericDataType;
MFnData::Type typedDataType;
MFnUnitAttribute::Type unitDataType;
_GetMayaAttributeNumericTypedAndUnitDataTypes(attrPlug,
numericDataType,
typedDataType,
unitDataType);
if (attrObj.hasFn(MFn::kMatrixAttribute)) {
// Using type "fltMatrix" with addAttr results in an MFnMatrixAttribute
// while using type "matrix" results in an MFnTypedAttribute with type
// kMatrix, but the data is extracted the same way for both.
typedDataType = MFnData::kMatrix;
}
// Deal with the MFnTypedAttribute attributes first. If it is numeric, it
// will fall through to the numericDataType switch below.
switch (typedDataType) {
case MFnData::kString:
return SdfValueTypeNames->String;
break;
case MFnData::kMatrix:
// This must be a Matrix4d even if
// translateMayaDoubleToUsdSinglePrecision is true, since Matrix4f
// is not supported in Sdf.
return SdfValueTypeNames->Matrix4d;
break;
case MFnData::kStringArray:
return SdfValueTypeNames->StringArray;
break;
case MFnData::kDoubleArray:
if (translateMayaDoubleToUsdSinglePrecision) {
return SdfValueTypeNames->FloatArray;
} else {
return SdfValueTypeNames->DoubleArray;
}
break;
case MFnData::kFloatArray:
return SdfValueTypeNames->FloatArray;
break;
case MFnData::kIntArray:
return SdfValueTypeNames->IntArray;
break;
case MFnData::kPointArray:
// Sdf does not have a 4-float point type, so we'll divide out W
// and export the points as 3 floats.
if (translateMayaDoubleToUsdSinglePrecision) {
return SdfValueTypeNames->Point3fArray;
} else {
return SdfValueTypeNames->Point3dArray;
}
break;
case MFnData::kVectorArray:
if (translateMayaDoubleToUsdSinglePrecision) {
return SdfValueTypeNames->Vector3fArray;
} else {
return SdfValueTypeNames->Vector3dArray;
}
break;
default:
break;
}
switch (numericDataType) {
case MFnNumericData::kBoolean:
return SdfValueTypeNames->Bool;
break;
case MFnNumericData::kByte:
case MFnNumericData::kChar:
case MFnNumericData::kShort:
// Maya treats longs the same as ints, since long is not
// platform-consistent. The Maya constants MFnNumericData::kInt and
// MFnNumericData::kLong have the same value. The same is true of
// k2Int/k2Long and k3Int/k3Long.
case MFnNumericData::kInt:
return SdfValueTypeNames->Int;
break;
case MFnNumericData::k2Short:
case MFnNumericData::k2Int:
return SdfValueTypeNames->Int2;
break;
case MFnNumericData::k3Short:
case MFnNumericData::k3Int:
return SdfValueTypeNames->Int3;
break;
case MFnNumericData::kFloat:
return SdfValueTypeNames->Float;
break;
case MFnNumericData::k2Float:
return SdfValueTypeNames->Float2;
break;
case MFnNumericData::k3Float:
if (MFnAttribute(attrObj).isUsedAsColor()) {
return SdfValueTypeNames->Color3f;
} else {
return SdfValueTypeNames->Float3;
}
break;
case MFnNumericData::kDouble:
if (translateMayaDoubleToUsdSinglePrecision) {
return SdfValueTypeNames->Float;
} else {
return SdfValueTypeNames->Double;
}
break;
case MFnNumericData::k2Double:
if (translateMayaDoubleToUsdSinglePrecision) {
return SdfValueTypeNames->Float2;
} else {
return SdfValueTypeNames->Double2;
}
break;
case MFnNumericData::k3Double:
if (MFnAttribute(attrObj).isUsedAsColor()) {
if (translateMayaDoubleToUsdSinglePrecision) {
return SdfValueTypeNames->Color3f;
} else {
return SdfValueTypeNames->Color3d;
}
} else {
if (translateMayaDoubleToUsdSinglePrecision) {
return SdfValueTypeNames->Float3;
} else {
return SdfValueTypeNames->Double3;
}
}
break;
case MFnNumericData::k4Double:
if (translateMayaDoubleToUsdSinglePrecision) {
return SdfValueTypeNames->Float4;
} else {
return SdfValueTypeNames->Double4;
}
break;
default:
break;
}
switch (unitDataType) {
case MFnUnitAttribute::kAngle:
case MFnUnitAttribute::kDistance:
if (translateMayaDoubleToUsdSinglePrecision) {
return SdfValueTypeNames->Float;
} else {
return SdfValueTypeNames->Double;
}
break;
default:
break;
}
return SdfValueTypeName();
}
