mirror of
https://github.com/Sneed-Group/Poodletooth-iLand
synced 2024-12-26 05:02:31 -06:00
102 lines
3.4 KiB
Python
102 lines
3.4 KiB
Python
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"""Undocumented Module"""
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__all__ = ['SfxPlayer']
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import math
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from pandac.PandaModules import *
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class SfxPlayer:
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"""
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Play sound effects, potentially localized.
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"""
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UseInverseSquare = 0
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def __init__(self):
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# volume attenuates according to the inverse square of the
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# distance from the source. volume = 1/(distance^2)
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# this is the volume at which a sound is nearly inaudible
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self.cutoffVolume = .02
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# cutoff for inverse square attenuation
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if SfxPlayer.UseInverseSquare:
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self.setCutoffDistance(300.0)
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else:
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# Distance at which sounds can no longer be heard
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# This was determined experimentally
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self.setCutoffDistance(120.0)
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def setCutoffDistance(self, d):
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self.cutoffDistance = d
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# this is the 'raw' distance at which the volume of a sound will
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# be equal to the cutoff volume
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rawCutoffDistance = math.sqrt(1./self.cutoffVolume)
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# this is a scale factor to convert distances so that a sound
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# located at self.cutoffDistance will have a volume
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# of self.cutoffVolume
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self.distanceScale = rawCutoffDistance / self.cutoffDistance
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def getCutoffDistance(self):
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"""Return the curent cutoff distance."""
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return self.cutoffDistance
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def getLocalizedVolume(self, node, listenerNode = None, cutoff = None):
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"""
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Get the volume that a sound should be played at if it is
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localized at this node. We compute this wrt the camera
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or to listenerNode.
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"""
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d = None
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if not node.isEmpty():
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if listenerNode and not listenerNode.isEmpty():
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d = node.getDistance(listenerNode)
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else:
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d = node.getDistance(base.cam)
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if d == None or d > cutoff:
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volume = 0
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else:
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if SfxPlayer.UseInverseSquare:
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sd = d*self.distanceScale
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volume = min(1, 1 / (sd*sd or 1))
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#print d, sd, volume
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else:
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volume = 1 - (d / (cutoff or 1))
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#print d, volume
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return volume
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def playSfx(
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self, sfx, looping = 0, interrupt = 1, volume = None,
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time = 0.0, node=None, listenerNode = None, cutoff = None):
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if sfx:
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if not cutoff:
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cutoff = self.cutoffDistance
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self.setFinalVolume(sfx, node, volume, listenerNode, cutoff)
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# don't start over if it's already playing, unless
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# "interrupt" was specified
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if interrupt or (sfx.status() != AudioSound.PLAYING):
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sfx.setTime(time)
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sfx.setLoop(looping)
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sfx.play()
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def setFinalVolume(self, sfx, node, volume, listenerNode, cutoff = None):
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"""Calculate the final volume based on all contributed factors."""
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# If we have either a node or a volume, we need to adjust the sfx
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# The volume passed in multiplies the distance base volume
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if node or (volume is not None):
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if node:
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finalVolume = self.getLocalizedVolume(node, listenerNode, cutoff)
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else:
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finalVolume = 1
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if volume is not None:
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finalVolume *= volume
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if node is not None:
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finalVolume *= node.getNetAudioVolume()
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sfx.setVolume(finalVolume)
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