def __init__(self, playlists, activePlaylist=None, useFastFades=False, gamma=2.2):
"""
playlists argument should be dictionary of playlist names : playlists.
useFastFades uses fast fades instead of linear fades when advancing/swapping playlists
(see fade class comments below)
"""
if not playlists:
raise Exception("Can't define a renderer without any playlists")
self.playlists = playlists
# activePlaylist is the name of the first playlist to display. Can be
# omitted if playlists only has one thing in it
if activePlaylist:
self.activePlaylist = activePlaylist
else:
if len(playlists.keys()) == 1:
self.activePlaylist = playlists.keys()[0]
else:
raise Exception("Can't define multi-playlist renderer without specifying active playlist")
# used when fading between playlists, to know what to return to when the fade is done
self.nextPlaylist = None
self.useFastFades = useFastFades
self.fade = None
self.gammaLayer = GammaLayer(gamma)
def __init__(self, playlists, activePlaylist=None, useFastFades=False, gamma=2.2):
"""
playlists argument should be dictionary of playlist names : playlists.
useFastFades uses fast fades instead of linear fades when advancing/swapping playlists
(see fade class comments below)
"""
if not playlists:
raise Exception("Can't define a renderer without any playlists")
self.playlists = playlists
# activePlaylist is the name of the first playlist to display. Can be
# omitted if playlists only has one thing in it
if activePlaylist:
self.activePlaylist = activePlaylist
else:
if len(playlists.keys()) == 1:
self.activePlaylist = playlists.keys()[0]
else:
raise Exception("Can't define multi-playlist renderer without specifying active playlist")
# used when fading between playlists, to know what to return to when the fade is done
self.nextPlaylist = None
self.useFastFades = useFastFades
self.fade = None
self.gammaLayer = GammaLayer(gamma)
self.sfx_layer = None
class Renderer:
"""
Renders the selected routine in the currently active playlist.
(A "routine" is an effect layer or list of effect layers.)
Performs smooth transitions when the active routine changes (either due to swapping
playlists or to advancing the selection in the current playlist).
Also applies a gamma correction layer after everything else is rendered.
8-16. Adding a special effect layer for Pulse. This is an additional layer that
is temporarily added by some external event - detecting a heartbeat, interactive event,
whatever. Special effect layers must self-terminate by returning True to the is_done()
call
"""
def __init__(self, playlists, activePlaylist=None, useFastFades=False, gamma=2.2):
"""
playlists argument should be dictionary of playlist names : playlists.
useFastFades uses fast fades instead of linear fades when advancing/swapping playlists
(see fade class comments below)
"""
if not playlists:
raise Exception("Can't define a renderer without any playlists")
self.playlists = playlists
# activePlaylist is the name of the first playlist to display. Can be
# omitted if playlists only has one thing in it
if activePlaylist:
self.activePlaylist = activePlaylist
else:
if len(playlists.keys()) == 1:
self.activePlaylist = playlists.keys()[0]
else:
raise Exception("Can't define multi-playlist renderer without specifying active playlist")
# used when fading between playlists, to know what to return to when the fade is done
self.nextPlaylist = None
self.useFastFades = useFastFades
self.fade = None
self.gammaLayer = GammaLayer(gamma)
self.sfx_layer = None
def _get(self, playlistKey):
if playlistKey:
return self.playlists[playlistKey]
else:
return None
def _active(self):
return self._get(self.activePlaylist)
def _next(self):
return self._get(self.nextPlaylist)
def render(self, model, params, frame):
if self.fade:
self.fade.render(model, params, frame)
if self.fade.done:
# If the fade was to a new playlist, set that one to active
if self.nextPlaylist:
self.activePlaylist = self.nextPlaylist
self.nextPlaylist = None
self.fade = None
elif self.activePlaylist:
for layer in self._active().selection():
layer.render(model, params, frame)
# layer.safely_render(model, params, frame)
if self.sfx_layer:
if self.sfx_layer.is_done():
self.sfx_layer = None
else:
self.sfx_layer.render(model, params, frame)
self.gammaLayer.render(model, params, frame)
def advanceCurrentPlaylist(self, fadeTime=1):
"""Advance selection within current playlist"""
active = self._active()
if active:
selection = active.selection()
active.advance()
self.fade = LinearFade(selection, active.selection(), fadeTime)
else:
raise Exception("Can't advance playlist - no playlist is currently active")
def addSpecialEffectLayer(self, sfx_layer):
""" Add special effect layer (will be drawn after all other layers. There is only
one special effect layer, and it is expected to self-terminate by setting its 'done'
flag. If a second special effect layer is added while the current one is still playing,
the second special effect layer will displace the first.) """
if not hasattr(sfx_layer, "is_done"):
print "Special effects layer has no is_done() function, ignoring"
else:
self.sfx_layer = sfx_layer
def _fadeTimeForTransition(self, playlist):
return max([effect.transitionFadeTime for effect in playlist.selection()])
def swapPlaylists(self, nextPlaylist, intermediatePlaylist=None, advanceAfterFadeOut=True, fadeTime=1):
"""Swap to a new playlist, either directly or by doing a two-step fade to an intermediate one first."""
# TODO check for wonky behavior when one fade is set while another is still in progress
active = self._active()
self.nextPlaylist = nextPlaylist
if self.useFastFades:
self.fade = FastFade(active.selection(), self._next().selection(), fadeTime)
else:
if intermediatePlaylist:
middle = self._get(intermediatePlaylist)
self.fade = TwoStepLinearFade(active.selection(), middle.selection(), self._next().selection(), 0.25, self._fadeTimeForTransition(middle))
if advanceAfterFadeOut:
middle.advance()
else:
self.fade = LinearFade(active.selection(), self._next().selection(), fadeTime)
if advanceAfterFadeOut:
active.advance()
class Renderer:
"""
Renders the selected routine in the currently active playlist.
(A "routine" is an effect layer or list of effect layers.)
Performs smooth transitions when the active routine changes (either due to swapping
playlists or to advancing the selection in the current playlist).
Also applies a gamma correction layer after everything else is rendered.
"""
def __init__(self, playlists, activePlaylist=None, useFastFades=False, gamma=2.2):
"""
playlists argument should be dictionary of playlist names : playlists.
useFastFades uses fast fades instead of linear fades when advancing/swapping playlists
(see fade class comments below)
"""
if not playlists:
raise Exception("Can't define a renderer without any playlists")
self.playlists = playlists
# activePlaylist is the name of the first playlist to display. Can be
# omitted if playlists only has one thing in it
if activePlaylist:
self.activePlaylist = activePlaylist
else:
if len(playlists.keys()) == 1:
self.activePlaylist = playlists.keys()[0]
else:
raise Exception("Can't define multi-playlist renderer without specifying active playlist")
# used when fading between playlists, to know what to return to when the fade is done
self.nextPlaylist = None
self.useFastFades = useFastFades
self.fade = None
self.gammaLayer = GammaLayer(gamma)
def _get(self, playlistKey):
if playlistKey:
return self.playlists[playlistKey]
else:
return None
def _active(self):
return self._get(self.activePlaylist)
def _next(self):
return self._get(self.nextPlaylist)
def render(self, model, params, frame):
if self.fade:
self.fade.render(model, params, frame)
if self.fade.done:
# If the fade was to a new playlist, set that one to active
if self.nextPlaylist:
self.activePlaylist = self.nextPlaylist
self.nextPlaylist = None
self.fade = None
elif self.activePlaylist:
for layer in self._active().selection():
layer.render(model, params, frame)
# layer.safely_render(model, params, frame)
self.gammaLayer.render(model, params, frame)
def advanceCurrentPlaylist(self, fadeTime=1):
"""Advance selection within current playlist"""
active = self._active()
if active:
selection = active.selection()
active.advance()
self.fade = LinearFade(selection, active.selection(), fadeTime)
else:
raise Exception("Can't advance playlist - no playlist is currently active")
def _fadeTimeForTransition(self, playlist):
return max([effect.transitionFadeTime for effect in playlist.selection()])
def swapPlaylists(self, nextPlaylist, intermediatePlaylist=None, advanceAfterFadeOut=True, fadeTime=1):
"""Swap to a new playlist, either directly or by doing a two-step fade to an intermediate one first."""
# TODO check for wonky behavior when one fade is set while another is still in progress
active = self._active()
self.nextPlaylist = nextPlaylist
if self.useFastFades:
self.fade = FastFade(active.selection(), self._next().selection(), fadeTime)
else:
if intermediatePlaylist:
middle = self._get(intermediatePlaylist)
self.fade = TwoStepLinearFade(active.selection(), middle.selection(), self._next().selection(), 0.25, self._fadeTimeForTransition(middle))
if advanceAfterFadeOut:
middle.advance()
else:
self.fade = LinearFade(active.selection(), self._next().selection(), fadeTime)
if advanceAfterFadeOut:
active.advance()
