tool
extends RichTextEffect
class_name RichTextMatrix

var bbcode = "matrix"


func _init():
	resource_name = "RichTextMatrix"


func _process_custom_fx(char_fx: CharFXTransform) -> bool:
	var clear_time = char_fx.env.get("clean", 2.0)
	var dirty_time = char_fx.env.get("dirty", 1.0)
	var text_span = char_fx.env.get("span", 50)

	var value = char_fx.character

	var matrix_time = fmod(
		char_fx.elapsed_time + (char_fx.absolute_index / float(text_span)), clear_time + dirty_time
	)

	matrix_time = 0.0 if matrix_time < clear_time else (matrix_time - clear_time) / dirty_time

	if value >= 65 && value < 126 && matrix_time > 0.0:
		value -= 65
		value = value + int(1 * matrix_time * (126 - 65))
		value %= (126 - 65)
		value += 65
	char_fx.character = value
	return true