The min/max values were stored in the color ramp shader, but to my surprise
these values were never persisted or copied: pseudo-color raster renderer
has a separate storage for the min/max values, so we need that for mesh renderer
as well.
The QgsRasterShaderFunction is not really useful, and QgsColorRamp should not
be derived from it, making things just more confusing.
Until now there was just one scalar and vector configuration
for a mesh layer. It is however most useful to have different
rendering settings for each dataset group (quantity).
- Adding datasets to mesh layer from properties panel
- Information and source panel in properties panel
- Selection of active dataset (properties or styling panel)
- Styling of contours/scalars (properties or styling panel)
- Styling of mesh frame (properties or styling panel)
- Styling of vector arrows (properties or styling panel)
Rudimentary support of rendering of vector data (e.g. velocity) on mesh map layers.
Rendering can be adjusted by QgsMeshRenderer*Settings. Only in Python
API, no GUI widgets for styling present.
