How to edit GPU particle 3d scale curve via script

Help Programming
1

Godot Version

4.5.1

Question

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I’ve got a GPU particle node set up with this process material. I’m trying to adjust the y position of point 1 in the scale curve to manipulate the scale of the emission.

I think I’ve manages to access the settings using:

@onready var coll_vfx: GPUParticles3D = $coll_vfx
@export scale_vfx = 1.0
# export is set to .3

coll_vfx.process_material.set("point_1/position", [0.508, scale_vfx])

I’m not getting any errors and the particle looks like the scale is the same as 1.0 when I run the scene.

print(coll_vfx.process_material.get("point_1/position")) I tried running this to see what s going on but I just get <null> . What is the correct way to set this value?

2

You can access the Curve via process_material.scale_curve.curve. Then you can use the Curve’s functions (like set_point_value()) to modify it.

1 Like
3

Thank you!