Added footsteps, new tree, various other tweaks

addons/proton_scatter/src/modifiers/offset_position.gd

@@ -0,0 +1,63 @@
+@tool
+extends "base_modifier.gd"
+
+
+@export_enum("Offset:0", "Multiply:1", "Override:2") var operation: int
+@export var position := Vector3.ZERO
+
+
+
+func _init() -> void:
+	display_name = "Edit Position"
+	category = "Offset"
+	can_restrict_height = false
+	global_reference_frame_available = true
+	local_reference_frame_available = true
+	individual_instances_reference_frame_available = true
+	use_individual_instances_space_by_default()
+
+	documentation.add_paragraph("Moves every transform the same way.")
+
+	var p := documentation.add_parameter("Position")
+	p.set_type("vector3")
+	p.set_description("How far each transforms are moved.")
+
+
+func _process_transforms(transforms, domain, _seed) -> void:
+	var s_gt: Transform3D = domain.get_global_transform()
+	var s_gt_inverse: Transform3D = s_gt.affine_inverse()
+	var t: Transform3D
+
+	for i in transforms.list.size():
+		t = transforms.list[i]
+
+		var value: Vector3
+
+		if is_using_individual_instances_space():
+			value = t.basis * position
+		elif is_using_global_space():
+			value = s_gt_inverse.basis * position
+		else:
+			value = position
+
+		match operation:
+			0:
+				t.origin += value
+			1:
+				if is_using_local_space():
+					t.origin *= value
+
+				if is_using_global_space():
+					var global_pos = s_gt * t.origin
+					global_pos -= s_gt.origin
+					global_pos *= position
+					global_pos += s_gt.origin
+
+					t.origin = s_gt_inverse * global_pos
+
+				elif is_using_individual_instances_space():
+					pass # Multiply does nothing on this reference frame.
+			2:
+				t.origin = value
+
+		transforms.list[i] = t