import math

from ..soundnode import SoundNode

class SineNode(SoundNode):
	
	def __init__(self, freqs, room):
	
		super().__init__("sine", room)
		self.freqs = freqs
		
	def calc_freqs_volumes(self, t):
		# This function returns volumes of each relevant freq
		# at tick t
		
		res = dict()
		for freq in self.freqs:
			res[freq] = 1 / float(len(self.freqs))
		return res
		
	def fill_amp_cache(self, t):
		
		tdct = dict()
		for freq, vol in self.calc_freqs_volumes(t).items():
			tdct[freq] = vol * math.sin(self.room.sine_multiplier * freq * t)
		
		self.amp_cache[t] = tdct