Fix issue 10827.

csukuangfj · csukuangfj · commit 28a78003f0b4 · 2018-02-11T15:54:36.000+08:00
diff --git a/modules/viz/src/widget.cpp b/modules/viz/src/widget.cpp
@@ -294,9 +294,9 @@ void cv::viz::Widget3D::applyTransform(const Affine3d &transform)
 
     vtkSmartPointer<vtkPolyDataMapper> mapper = vtkPolyDataMapper::SafeDownCast(actor->GetMapper());
     CV_Assert("Widget doesn't have a polydata mapper" && mapper);
-    mapper->Update();
 
     VtkUtils::SetInputData(mapper, VtkUtils::TransformPolydata(mapper->GetInput(), transform));
+    mapper->Update();
 }
 
 void cv::viz::Widget3D::setColor(const Color &color)

Original file line number	Diff line number	Diff line change
`@@ -294,9 +294,9 @@ void cv::viz::Widget3D::applyTransform(const Affine3d &transform)`
`294`	`294`
`295`	`295`	`vtkSmartPointer<vtkPolyDataMapper> mapper = vtkPolyDataMapper::SafeDownCast(actor->GetMapper());`
`296`	`296`	`CV_Assert("Widget doesn't have a polydata mapper" && mapper);`
`297`		`- mapper->Update();`
`298`	`297`
`299`	`298`	`VtkUtils::SetInputData(mapper, VtkUtils::TransformPolydata(mapper->GetInput(), transform));`
	`299`	`+ mapper->Update();`
`300`	`300`	`}`
`301`	`301`
`302`	`302`	`void cv::viz::Widget3D::setColor(const Color &color)`