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# Version: MPL 1.1/GPL 2.0/LGPL 2.1
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# The contents of this file are subject to the Mozilla Public License Version
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# for the specific language governing rights and limitations under the
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#
# The Original Code is the Python Computer Graphics Kit.
#
# The Initial Developer of the Original Code is Matthias Baas.
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#
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# $Id: valuetable.py,v 1.1.1.1 2004/12/12 14:31:30 mbaas Exp $
## \file valuetable.py
## Contains the ValueTable component.
from scene import getScene
import component
import bisect
from cgtypes import *
from slots import *
# TableEntry
class _TableEntry:
"""Stores a time/value pair for the ValueTable component.
This is an internal class.
"""
def __init__(self, t, v):
self.t = t
self.v = v
def __str__(self):
return "%f : %s"%(self.t, self.v)
__repr__ = __str__
def __cmp__(self, other):
if other==None:
return 1
else:
if self.t<other.t:
return -1
elif self.t>other.t:
return 1
else:
return 0
# ValueTable
class ValueTable(component.Component):
"""ValueTable component.
This class stores time/value pairs and has an output slot that
holds the appropriate value for the current time. The type of
the value can be specified in the constructor. The name of the
output slot is always \c output_slot.
"""
def __init__(self,
name = "ValueTable",
type = "vec3",
values = [],
modulo = None,
tscale = 1.0,
auto_insert = True):
"""Constructor.
\param name (\c str) Component name
\param type (\c str) Value type
\param values A list of tuples (time, value).
\param modulo (\c float) Loop duration (None = no loop)
\param tscale (\c float) Scaling factor for the time. A value of less than 1.0 makes the animation slower.
"""
component.Component.__init__(self, name=name, auto_insert=auto_insert)
# Value list. Contains a sorted list of TableEntry objects
self.values = []
# Time modulo value (or None)
self.modulo = modulo
# Scale factor for the time
self.tscale = 1.0
# Type of the value slot
self.type = type
self.time_slot = DoubleSlot()
self.addSlot("time", self.time_slot)
typ = type.lower()
exec "self.output_slot = Procedural%sSlot(self.computeValue)"%typ.capitalize()
self.addSlot("output", self.output_slot)
pytypes = {"double":"float"}
exec "self.default_value = %s()"%pytypes.get(typ, typ)
self.time_slot.addDependent(self.output_slot)
getScene().timer().time_slot.connect(self.time_slot)
for t,v in values:
self.add(t,v)
def __iter__(self):
return self.iterValues()
def __call__(self, time):
if len(self.values)==0:
return self.default_value
time *= self.tscale
if self.modulo!=None:
time = time % self.modulo
idx = bisect.bisect_left(self.values, _TableEntry(time,self.default_value))
if idx>=len(self.values):
idx = len(self.values)-1
e = self.values[idx]
if time<e.t:
if idx>0:
return self.values[idx-1].v
return e.v
def __getitem__(self, time):
return self(time)
def __setitem__(self, time, value):
self.add(time, value)
# iterValues
def iterValues(self):
"""Iterate over all time/value pairs.
"""
for e in self.values:
yield e.t, e.v
# add
def add(self, t, v):
"""Add a value to the table.
\param t (\c float) Time
\param v Value
"""
entry = _TableEntry(t, v)
idx = bisect.bisect_left(self.values, entry)
# Check if times are identical and the previous value has
# to be replaced
if idx<len(self.values):
if self.values[idx].t==t:
# Replace the value
self.values[idx] = entry
return
# Insert the value
self.values.insert(idx, entry)
## protected:
def computeValue(self):
"""Computes a new output value."""
return self(self.time_slot.getValue())
exec slotPropertyCode("output")
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