Sample Curve Node

The Sample Curve calculates a point on a curve at a certain distance from the start of the curve, specified by the length or factor inputs. It also outputs data retrieved from that position on the curve. The sampled values are linearly interpolated from the values at the evaluated curve points at each side of the sampled point.

Muista

When the curve contains multiple splines, the sample position is found based on the total accumulated length, including the lengths of all previous splines. The order of the splines is the same order as displayed in the Spreadsheet Editor.

Inputs

Curve

Standard geometry input with a curve component.

Factor

The portion of the total length used to determine the sample position.

Length

A length in distance units used to determine how far along the curve to travel before sampling.

Properties

Mode

How to find endpoint positions for the trimmed spline. The option acts the same as it does in the Trim Curve Node.

Factor

Find the endpoint positions using a factor of each spline’s length. The input values should be between 0 or 1.

Length

Find the endpoint positions using a length from the start of each spline. The input values should be between 0 and the length of the splines.

Outputs

Position

The position at the sample along the spline.

Tangent

The normalized curve tangent at the sample.

Vihje

This output can be combined with the Align Euler to Vector Node to create a rotation that lines up with direction of the curve. Including the Normal output in a second align node after can align the other rotation axis.

Normal

The normalized curve normal at the sample.

Examples

Here, the Count mode of the Resample Curve Node is recreated, except a mesh is used for the result instead of a curve. The Z axis of the position can be used as the sample factor because the position is between zero and one for the entire line.