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Polyline examples: More intelligible comments.

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This commit is contained in:
NAThompson 2019-06-27 16:31:20 -04:00
parent cbd2dd60a7
commit d8faed8480
1 changed files with 4 additions and 4 deletions
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8
examples/polyline_archimedean_helix/PolylineArchimedeanHelix.cxx
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@ -94,17 +94,16 @@ void TubeThatSpiral(vtkm::FloatDefault radius, vtkm::Id numLineSegments, vtkm::I
camera.SetPosition(totalExtent * (mag * 2.f));
vtkm::cont::ColorTable colorTable("inferno");
// Create a mapper, canvas and view that will be used to render the scene
vtkm::rendering::Scene scene;
vtkm::rendering::MapperRayTracer mapper;
vtkm::rendering::CanvasRayTracer canvas(2048, 2048);
vtkm::rendering::Color bg(0.2f, 0.2f, 0.2f, 1.0f);
// Render an image of the output isosurface
vtkm::cont::DataSetFieldAdd dsfa;
std::vector<vtkm::FloatDefault> v(tubePoints.GetNumberOfValues());
// The first value is a cap:
v[0] = 0;
//std::cout << "size of v = " << v.size() << "\n";
for (vtkm::Id i = 1; i < vtkm::Id(v.size()); i += numSides)
{
vtkm::FloatDefault t = 4 * vtkm::FloatDefault(3.1415926) * (i + 1) / numSides;
@ -137,9 +136,10 @@ int main()
vtkm::FloatDefault radius = 0.5f;
// How many segments is the tube decomposed into?
vtkm::Id numLineSegments = 100;
// As numSides->infty, the tubes becomes perfectly cylindrical:
vtkm::Id numSides = 50;
TubeThatSpiral(radius, numLineSegments, numSides);
// Now make a square around the spiral:
// Setting numSides = 4 makes a square around the polyline:
numSides = 4;
TubeThatSpiral(radius, numLineSegments, numSides);
return 0;