MeshInstance that animates its UV offset for a trippy visual effect

MeshInstanceUV.gd

tool
extends MeshInstance
class_name MeshInstanceUV


var _time := Vector2()
export var speed := Vector2(1.0, 1.0)

export var sinusoid_factor := Vector2(1.0, 1.0)
export var linear_factor := Vector2(1.0, 1.0)


func _ready() -> void:
    _time += Vector2(1, 1) * randf()
    if not owner and get_surface_material_count() > 0:
        var material: SpatialMaterial = get_surface_material(0)
        if not material: return
        material.uv1_offset = Vector3()


func _process(delta: float) -> void:
    if not owner or get_surface_material_count() == 0: return
    _time += delta * speed
    var material: SpatialMaterial = get_surface_material(0)
    if not material: return
    material.uv1_offset.x = (sin(_time.x * 2 * PI) / (2 * PI)) * sinusoid_factor.x + _time.x * linear_factor.x
    material.uv1_offset.y = (sin(_time.y * 2 * PI) / (2 * PI)) * sinusoid_factor.y + _time.y * linear_factor.y