Sample Curve Node #89612

New Issue

Hans Goudey · 2021-07-02T20:08:11+02:00

Hans Goudey commented

2021-07-02 20:08:11 +02:00

{F10209775 size=full}

Like the "Attribute Sample Texture" node, this creates or modifies an attribute based on the sampling along curve splines based on a parameter input for each point.

Details

For each element (any domain should be supported) of the geometry input, the parameter value chooses how far along the curve to sample the value of the input attribute along the curve.
The type of the result attribute depends on the type of the attribute on the curve input.
One simple use case is using one curve to transfer taper to another, like in the geometry panel of curve data.
Beyond that, this node is more of a foundational building block node for interaction with volume data that could be useful in many different situations.

Related Nodes

D11596: Geometry Nodes: Curve Deform Node As an example of the flexibility this provides, the curve deform node could be implemented with this node.
A single-value version of this function might work very well with the fields proposal

Further Questions

Multiple splines could be supported-- the factor could be a factor along all splines in the curve.
A "Length" option could be supported, as well as a "Factor" mode.

Implementation

This is somewhat similar to the curve deform node. Actually, the curve deform could be internally implemented with this node.

{[F10209775](https://archive.blender.org/developer/F10209775/image.png) size=full} Like the "Attribute Sample Texture" node, this creates or modifies an attribute based on the sampling along curve splines based on a parameter input for each point. **Details** * For each element (any domain should be supported) of the geometry input, the parameter value chooses how far along the curve to sample the value of the input attribute along the curve. * The type of the result attribute depends on the type of the attribute on the curve input. * One simple use case is using one curve to transfer taper to another, like in the geometry panel of curve data. * Beyond that, this node is more of a foundational building block node for interaction with volume data that could be useful in many different situations. **Related Nodes** * [D11596: Geometry Nodes: Curve Deform Node](https://archive.blender.org/developer/D11596) As an example of the flexibility this provides, the curve deform node could be implemented with this node. * A single-value version of this function might work very well with the [fields proposal ](https://devtalk.blender.org/t/fields-and-anonymous-attributes-proposal/19450) **Further Questions** * Multiple splines could be supported-- the factor could be a factor along all splines in the curve. * A "Length" option could be supported, as well as a "Factor" mode. **Implementation** * This is somewhat similar to the curve deform node. Actually, the curve deform could be internally implemented with this node.

Hans Goudey commented

2021-07-02 20:08:11 +02:00

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