Trim Curve Node #87423

New Issue

Hans Goudey · 2021-04-12T14:58:18+02:00

Hans Goudey commented

2021-04-12 14:58:18 +02:00

{F9973750 size=full}	{F9973731 size=full}

This task is for a node with a feature-set corresponding to the the "Start and End Mapping" sub-panel for curve geometry.

Details

This node differs from the existing feature in that it outputs a changed curve rather than only changing the evaluated positions.
This raises some complexity in that it must interpolate control point values like handle positions, however, the node becomes much simpler conceptually in general.

Further Questions

I wonder about use cases for the "Resolution" mode in the current feature. It would be easy to add but maybe there is no use case.

Implementation

The node can use a generic "sampling" to get the factor or length mapped onto the curve.
Then it can interpolate data to the neighboring evaluated points, and then interpolate between those two points with a factor returned from that lookup.

| {[F9973750](https://archive.blender.org/developer/F9973750/image.png) size=full} | {[F9973731](https://archive.blender.org/developer/F9973731/image.png) size=full} | -- | -- | This task is for a node with a feature-set corresponding to the the "Start and End Mapping" sub-panel for curve geometry. **Details** * This node differs from the existing feature in that it outputs a changed curve rather than only changing the evaluated positions. * This raises some complexity in that it must interpolate control point values like handle positions, however, the node becomes much simpler conceptually in general. **Further Questions** * I wonder about use cases for the "Resolution" mode in the current feature. It would be easy to add but maybe there is no use case. **Implementation** * The node can use a generic "sampling" to get the factor or length mapped onto the curve. * Then it can interpolate data to the neighboring evaluated points, and then interpolate between those two points with a factor returned from that lookup.

Hans Goudey commented

2021-04-12 14:58:18 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'