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PathFollow2D

Inherits: Node2D < CanvasItem < Node < Object

Point sampler for a Path2D.

Description

This node takes its parent Path2D, and returns the coordinates of a point within it, given a distance from the first vertex.

It is useful for making other nodes follow a path, without coding the movement pattern. For that, the nodes must be children of this node. The descendant nodes will then move accordingly when setting the progress in this node.

Properties

bool	cubic_interp	true
float	h_offset	0.0
bool	loop	true
float	progress	0.0
float	progress_ratio	0.0
bool	rotates	true
float	v_offset	0.0

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Property Descriptions

bool cubic_interp = true

• void set_cubic_interpolation ( bool value )

• bool get_cubic_interpolation ( )

If true, the position between two cached points is interpolated cubically, and linearly otherwise.

The points along the Curve2D of the Path2D are precomputed before use, for faster calculations. The point at the requested offset is then calculated interpolating between two adjacent cached points. This may present a problem if the curve makes sharp turns, as the cached points may not follow the curve closely enough.

There are two answers to this problem: either increase the number of cached points and increase memory consumption, or make a cubic interpolation between two points at the cost of (slightly) slower calculations.

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float h_offset = 0.0

• void set_h_offset ( float value )

• float get_h_offset ( )

The node's offset along the curve.

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bool loop = true

• void set_loop ( bool value )

• bool has_loop ( )

If true, any offset outside the path's length will wrap around, instead of stopping at the ends. Use it for cyclic paths.

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