USD DataAlgo : Support conversion of float4 to Color4f

Author: johnhaddon

contrib/IECoreUSD/src/IECoreUSD/DataAlgo.cpp

@@ -215,6 +215,8 @@ static const std::map<pxr::TfType, IECore::DataPtr (*)( const pxr::VtValue &, Ge
 	{ TfType::Find<VtArray<GfVec2f>>(), &dataFromArray<GfVec2f> },
 	{ TfType::Find<GfVec3f>(), &dataFromValue<GfVec3f> },
 	{ TfType::Find<VtArray<GfVec3f>>(), &dataFromArray<GfVec3f> },
+	{ TfType::Find<GfVec4f>(), &dataFromValue<GfVec4f> },
+	{ TfType::Find<VtArray<GfVec4f>>(), &dataFromArray<GfVec4f> },
 	{ TfType::Find<GfVec2d>(), &dataFromValue<GfVec2d> },
 	{ TfType::Find<VtArray<GfVec2d>>(), &dataFromArray<GfVec2d> },
 	{ TfType::Find<GfVec3d>(), &dataFromValue<GfVec3d> },

contrib/IECoreUSD/test/IECoreUSD/USDSceneTest.py

@@ -283,6 +283,8 @@ def testPrimVarTypes ( self ) :
 			'test_Float2_Scalar_constant' : IECore.V2fData( imath.V2f( 0.1, 0.2 ) ),
 			'test_Float3_Array_constant' : IECore.V3fVectorData( [imath.V3f( 1.1, 1.2, 1.3 ), imath.V3f( 2.1, 2.2, 2.3 ), imath.V3f( 3.1, 3.2, 3.3 )] ),
 			'test_Float3_Scalar_constant' : IECore.V3fData( imath.V3f( 0.1, 0.2, 0.3 ) ),
+			'test_Float4_Array_constant' : IECore.Color4fVectorData( [imath.Color4f( 1.1, 1.2, 1.3, 1.4 ), imath.Color4f( 2.1, 2.2, 2.3, 2.4 ), imath.Color4f( 3.1, 3.2, 3.3, 3.4 )] ),
+			'test_Float4_Scalar_constant' : IECore.Color4fData( imath.Color4f( 0.1, 0.2, 0.3, 0.4 ) ),
 			'test_Float_Array_constant' : IECore.FloatVectorData( [0.7, 0.8, 0.9] ),
 			'test_Float_Scalar_constant' : IECore.FloatData( 0.6 ),
 			'test_Half_Array_constant' : IECore.HalfVectorData( [0.0999756, 0.199951, 0.300049] ),