add sit state and colors to cat

core/ai/agents/cat/ai_cat.gd

@@ -0,0 +1,38 @@
+extends AIBase
+
+class_name AICat
+
+@export_group("Cat Colors")
+@export var mesh: MeshInstance3D
+@export var fur_colors: Array[Color] = []
+@export var eye_colors: Array[Color] = []
+
+@export var fur_material_index: int = 0
+@export var eye_material_index: int = 1
+
+func _ready() -> void:
+	super._ready()
+	_apply_random_color()
+
+func _apply_random_color() -> void:
+	if fur_colors.is_empty() or eye_colors.is_empty():
+		return
+		
+	if not mesh or not mesh.mesh:
+		return
+		
+	var max_index = min(fur_colors.size(), eye_colors.size())
+	var random_idx = randi() % max_index
+	
+	_override_material_color(mesh, fur_material_index, fur_colors[random_idx])
+	_override_material_color(mesh, eye_material_index, eye_colors[random_idx])
+
+func _override_material_color(mesh_node: MeshInstance3D, surface_idx: int, color: Color) -> void:
+	if surface_idx < 0 or surface_idx >= mesh_node.mesh.get_surface_count():
+		return
+		
+	var mat = mesh_node.mesh.surface_get_material(surface_idx)
+	if mat and mat is StandardMaterial3D:
+		var new_mat = mat.duplicate() as StandardMaterial3D
+		new_mat.albedo_color = color
+		mesh_node.set_surface_override_material(surface_idx, new_mat)