How to modify a shader's parameters in runtime?

system · December 29, 2019, 5:09am


	Attention	Topic was automatically imported from the old Question2Answer platform.
	Asked By	Setherino

I have a shader and I want it to get more extreme with the players speed. How would I edit this shader’s parameters in runtime?

system · December 29, 2019, 7:49am


	Reply From:	kidscancode

You need to get a reference to the material. If it’s a CanvasItem (2D) you can get it with material. If it’s a MeshInstance, you can use its GeometryInstance.material_override or Mesh.surface_get_material or PrimitiveMesh.material. I’ve linked to the class docs if you need details.

After that it depends on what kind of material it is:

ShaderMaterial: You can change any uniform parameter with set_shader_param()
ShaderMaterial — Godot Engine (3.1) documentation in English
SpatialMaterial: set the parameter name directly:
SpatialMaterial — Godot Engine (3.1) documentation in English

For example, if you have a boolean parameter, grayscale, to turn on and off grayscale:
$Sprite.material.set_shader_param(‘grayscale’,true)

attunemm | 2023-06-30 20:38