debug_combine2.gd

## Debug: validate all combined array sizes before add_surface_from_arrays.
extends SceneTree

func _init() -> void:
	var recipe := SKRecipe.load_from_file("res://synty_assets/characters/Starter_01.sk")
	var library := SKPartLibrary.new()
	library.scan()
	var builder := SKCharacterBuilder.new(library, null)
	builder.combine_meshes = false
	var character := builder.build(recipe)
	var parts: Array = character.find_children("*", "MeshInstance3D", true, false)

	# Per-part structure survey.
	var total_vertices := 0
	var modes := {}
	var influence_counts := {}
	var indexless := 0
	var tangentless := 0
	for mesh_instance: MeshInstance3D in parts:
		var mesh := mesh_instance.mesh as ArrayMesh
		modes[mesh.blend_shape_mode] = modes.get(mesh.blend_shape_mode, 0) + 1
		for s in mesh.get_surface_count():
			var arrays := mesh.surface_get_arrays(s)
			var vcount := (arrays[Mesh.ARRAY_VERTEX] as PackedVector3Array).size()
			total_vertices += vcount
			if arrays[Mesh.ARRAY_INDEX] == null:
				indexless += 1
			if arrays[Mesh.ARRAY_TANGENT] == null:
				tangentless += 1
			var bones = arrays[Mesh.ARRAY_BONES]
			if bones != null and vcount > 0:
				var inf := int(bones.size() / float(vcount))
				influence_counts[inf] = influence_counts.get(inf, 0) + 1
	print("parts=%d verts=%d modes=%s influences=%s indexless=%d tangentless=%d" % [
		parts.size(), total_vertices, modes, influence_counts, indexless, tangentless])

	# Union sizes of blend names (full vs suffix).
	var full := {}
	var suffix := {}
	for mesh_instance: MeshInstance3D in parts:
		var mesh := mesh_instance.mesh as ArrayMesh
		for b in mesh.get_blend_shape_count():
			var shape_name := String(mesh.get_blend_shape_name(b))
			full[shape_name] = true
			suffix[shape_name.get_slice(".", shape_name.get_slice_count(".") - 1)] = true
	print("blend union: full=%d suffix=%d" % [full.size(), suffix.size()])

	character.free()
	quit(0)