From f0464f40ac21b42e0acc082e96e7252a36d13144 Mon Sep 17 00:00:00 2001
From: Mark Mine <mark.mine@disney.com>
Date: Wed, 14 Mar 2001 20:04:56 +0000
Subject: [PATCH] *** empty log message ***

---
 direct/src/interval/FunctionInterval.py | 69 +++++++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/direct/src/interval/FunctionInterval.py b/direct/src/interval/FunctionInterval.py
index e2560e99e2..5fc4d1ab79 100644
--- a/direct/src/interval/FunctionInterval.py
+++ b/direct/src/interval/FunctionInterval.py
@@ -168,3 +168,72 @@ class PosHprScaleInterval(FunctionInterval):
 	    PosHprScaleInterval.posHprScaleIntervalNum += 1
         # Create function interval
         FunctionInterval.__init__(self, posHprScaleFunc, name = name)
+
+
+"""
+SAMPLE CODE
+
+### Using lambdas and functions ###
+# Using a lambda
+i1 = FunctionInterval(lambda: base.transitions.fadeOut())
+i2 = FunctionInterval(lambda: base.transitions.fadeIn())
+# Using a function
+def printHello():
+    print 'hello'
+
+i3 = FunctionInterval(printHello)
+# Create track
+t = Track([(0.0, i1), (2.0, i2), (4.0, i3)], name = 'demo')
+# Play track
+t.play()
+
+### Specifying interval start times during track construction ###
+# Interval start time can be specified relative to three different points:
+# PREVIOUS_END
+# PREVIOUS_START
+# TRACK_START
+
+startTime = 0.0
+def printStart():
+    global startTime
+    startTime = globalClock.getFrameTime()
+    print 'Start'
+
+def printPreviousStart():
+    global startTime
+    currTime = globalClock.getFrameTime()
+    print 'PREVIOUS_END %0.2f' % (currTime - startTime)
+
+def printPreviousEnd():
+    global startTime
+    currTime = globalClock.getFrameTime()
+    print 'PREVIOUS_END %0.2f' % (currTime - startTime)
+
+def printTrackStart():
+    global startTime
+    currTime = globalClock.getFrameTime()
+    print 'TRACK_START %0.2f' % (currTime - startTime)
+
+i1 = FunctionInterval(printStart)
+# Just to take time
+i2 = LerpPosInterval(camera, 2.0, Point3(0,10,0))
+# This will be relative to end of camera move
+i3 = FunctionInterval(printPreviousEnd)
+# Just to take time
+i4 = LerpPosInterval(camera, 2.0, Point3(0,0,0))
+# This will be relative to the start of the camera move
+i5 = FunctionInterval(printPreviousStart)
+# This will be relative to track start
+i6 = FunctionInterval(printTrackStart)
+# Create the track, if you don't specify offset type in tuple it defaults to
+# relative to TRACK_START (first entry below)
+t = Track([(0.0, i1),                 # i1 start at t = 0, duration = 0.0
+           (1.0, i2, TRACK_START),    # i2 start at t = 1, duration = 2.0
+           (2.0, i3, PREVIOUS_END),   # i3 start at t = 5, duration = 0.0
+           (1.0, i4, PREVIOUS_END),   # i4 start at t = 6, duration = 2.0
+           (3.0, i5, PREVIOUS_START), # i5 start at t = 9, duration = 0.0
+           (10.0, i6, TRACK_START)],  # i6 start at t = 10, duration = 0.0
+          name = 'startTimeDemo')
+t.play()
+
+"""