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Use curve to digitize Polylines/Polygons #5842

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@qsavoye qsavoye commented Nov 21, 2024

Use curve to digitize Polylines/Polygons

test

  1. Active Curve mode during Digitization of a Polygon
  2. Add a first vertex to define the center point of the arc
  3. Add a second vertex to stop the arc

Precision of the final arc can be set in QField Parameters page (slider)

height: visible ? 40 : 0
padding: 2
round: true
visible: dashBoard.activeLayer && (dashBoard.activeLayer.geometryType() === Qgis.GeometryType.Polygon || dashBoard.activeLayer.geometryType() === Qgis.GeometryType.Line)
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I think we want this to be dependent on QgsWkbTypes.isCurvedType()

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In my example , my layer is not a curve type at all and i use QgsCompoundCurve::curveToLine function to set geometry drawn into my none curved layer. This helps me to drawn faster instead of set vertex by vertex.

But you are right i am not taking into account the possibility to set directly the qgscompoundcurve geometry into the new feature.

How do you think ?

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Interesting, I was mostly seeing this in the context of surveying / cadastre, where curves are often a requirement. My main motivation here would be to keep the interface as light as possible and ask users to have a curve layer if they want this feature. What do you think?

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I am using it to draw underground maps, such as caves or old quarries. My polygon layer corresponds to some galleries and i no need to have a specific curved layer but some times digitizing arcs like in qgis help me.

Maybe we can allow it only for curved layer (QgsWkbTypes.isCurvedType()) or for advanced digitizing user ( which could be set in settings).

Tell me what you think ?

Sorry for the delay, i had some stuff to do last week.

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