fix(vtktubefilter): correcting the discrepancy in the number of points and normals of vtkTubeFilter

The polyData returned by the vtkTubeFilter has different number of points and normals when the
capping is on. The normals data is allocated more number of points depending on the numberOfSides
attribute of vtkTubeFilter.

Author: Nikhil216

Sources/Filters/General/TubeFilter/index.js

@@ -661,10 +661,7 @@ function vtkTubeFilter(publicAPI, model) {
       size: numNewPts * 3,
       numberOfComponents: 3,
     });
-    let numNormals = 3 * numNewPts;
-    if (model.capping) {
-      numNormals = 3 * (numNewPts + 2 * model.numberOfSides);
-    }
+    const numNormals = 3 * numNewPts;
     const newNormalsData = new Float32Array(numNormals);
     const newNormals = vtkDataArray.newInstance({
       numberOfComponents: 3,

Sources/Filters/General/TubeFilter/test/testTubeFilter.js

@@ -112,7 +112,7 @@ test('Test vtkTubeFilter execution', (t) => {
     'Make sure the output number of points is correct with capping.'
   );
   t.ok(
-    tubeOutput2.getPointData().getNormals().getNumberOfTuples() === 24,
+    tubeOutput2.getPointData().getNormals().getNumberOfTuples() === 18,
     'Make sure the output number of normals is correct with capping.'
   );
   t.end();