Marked the old versions of PrepareFor* that do not use tokens as
deprecated and moved all of the code to use the new versions that
require a token. This makes the scope of the execution object more
explicit so that it will be kept while in use and can potentially be
reclaimed afterward.
Having a custom assignment operator means that the compiler
isn't required to generate the implicit copy constructor.
This makes sure they are constructed.
To get the average, we (of course) divide the sum by the amount of
values, which is returned from valuesIn.GetNumberOfComponents(). To do
this, we need to cast the number of components (returned as a
vtkm::IdComponent) to a FieldType. This is a little more complex than it
first seems because FieldType might be a Vec type. If you just try a
static_cast<FieldType>(), it will use the constructor to FieldType which
might be a Vec constructor expecting the type of the component. This in
turn could cause a warning because the vtkm::IdComponent is implicitly
converted to the Vec's component type.
Get around this problem by first casting to the component type of the
field and then constructing a field value from that.
Found via `codespell` and `grep`
more typos
includes source typo change and a typo that needs further review
follow-up typos
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Changed the "default" ColorTable preset from "cool to warm" to
"viridis." Also made a default constructor for ColorTable that sets it
to this default preset.
The main reason to change to viridis for the default is that it is in
LAB space. We are concerned that having the default ColorTable preset
being Diverging space could lead to users using that color space
inappropriately.
The problem is that there is no good "default" constructor for
ColorTable. The previous default constructor created an empty color
table, but that would be confusing if someone actually tried to use it.
We could set ot to the default preset, but the default preset uses the
diverging color map, which could foul people up if they actually want to
edit or create their own color map. Instead, force the declaration of
ColorTable to indicate what you plan to do with it.
You can still select presets through strings (and we leave ourselves
open to add more presets through strings than enumerating with the
enum), but this provides a way to select a preset that is verified by
the compiler.
The new and improved vtkm::cont::ColorTable provides a more feature complete
color table implementation that is modeled after
vtkDiscretizableColorTransferFunction. This class therefore supports different
color spaces ( rgb, lab, hsv, diverging ) and supports execution across all
device adapters.