#!/usr/bin/env python # Author: Shao Zhang, Phil Saltzman, and Elan Ruskin # Last Updated: 2015-03-13 # # This tutorial shows how to load, play, and manipulate sounds # and sound intervals in a panda project. from direct.showbase.ShowBase import ShowBase from panda3d.core import NodePath, TextNode from panda3d.core import PointLight, AmbientLight from direct.gui.OnscreenText import OnscreenText from direct.showbase.DirectObject import DirectObject from direct.interval.SoundInterval import SoundInterval from direct.gui.DirectSlider import DirectSlider from direct.gui.DirectButton import DirectButton from direct.interval.MetaInterval import Parallel from direct.interval.LerpInterval import LerpHprInterval import sys # Create an instance of ShowBase, which will open a window and set up a # scene graph and camera. base = ShowBase() class MusicBox(DirectObject): def __init__(self): # Our standard title and instructions text self.title = OnscreenText(text="Panda3D: Tutorial - Music Box", parent=base.a2dBottomCenter, pos=(0, 0.08), scale=0.08, fg=(1, 1, 1, 1), shadow=(0, 0, 0, .5)) self.escapeText = OnscreenText(text="ESC: Quit", parent=base.a2dTopLeft, fg=(1, 1, 1, 1), pos=(0.06, -0.1), align=TextNode.ALeft, scale=.05) # Set up the key input self.accept('escape', sys.exit) # Fix the camera position base.disableMouse() # Loading sounds is done in a similar way to loading other things # Loading the main music box song self.musicBoxSound = loader.loadMusic('music/musicbox.ogg') self.musicBoxSound.setVolume(.5) # Volume is a percentage from 0 to 1 # 0 means loop forever, 1 (default) means # play once. 2 or higher means play that many times self.musicBoxSound.setLoopCount(0) # Set up a simple light. self.plight = PointLight("light") self.plight.setColor((0.7, 0.7, 0.5, 1)) light_path = base.render.attachNewNode(self.plight) light_path.setPos(0, 0, 20) base.render.setLight(light_path) alight = AmbientLight("ambient") alight.setColor((0.3, 0.3, 0.4, 1)) base.render.setLight(base.render.attachNewNode(alight)) # Enable per-pixel lighting base.render.setShaderAuto() # Sound objects do not have a pause function, just play and stop. So we will # Use this variable to keep track of where the sound is at when it was stoped # to impliment pausing self.musicTime = 0 # Loading the open/close effect # loadSFX and loadMusic are identical. They are often used for organization #(loadMusic is used for background music, loadSfx is used for other effects) self.lidSfx = loader.loadSfx('music/openclose.ogg') # The open/close file has both effects in it. Fortunatly we can use intervals # to easily define parts of a sound file to play self.lidOpenSfx = SoundInterval(self.lidSfx, duration=2, startTime=0) self.lidCloseSfx = SoundInterval(self.lidSfx, startTime=5) # For this tutorial, it seemed appropriate to have on screen controls. # The following code creates them. # This is a label for a slider self.sliderText = OnscreenText("Volume", pos=(-0.1, 0.87), scale=.07, fg=(1, 1, 1, 1), shadow=(0, 0, 0, 1)) # The slider itself. It calls self.setMusicBoxVolume when changed self.slider = DirectSlider(pos=(-0.1, 0, .75), scale=0.8, value=.50, command=self.setMusicBoxVolume) # A button that calls self.toggleMusicBox when pressed self.button = DirectButton(pos=(.9, 0, .75), text="Open", scale=.1, pad=(.2, .2), rolloverSound=None, clickSound=None, command=self.toggleMusicBox) # A variable to represent the state of the simulation. It starts closed self.boxOpen = False # Here we load and set up the music box. It was modeled in a complex way, so # setting it up will be complicated self.musicBox = loader.loadModel('models/MusicBox') self.musicBox.setPos(0, 60, -9) self.musicBox.reparentTo(render) # Just like the scene graph contains hierarchies of nodes, so can # models. You can get the NodePath for the node using the find # function, and then you can animate the model by moving its parts # To see the hierarchy of a model, use, the ls function # self.musicBox.ls() prints out the entire hierarchy of the model # Finding pieces of the model self.Lid = self.musicBox.find('**/lid') self.Panda = self.musicBox.find('**/turningthing') # This model was made with the hinge in the wrong place # this is here so we have something to turn self.HingeNode = self.musicBox.find( '**/box').attachNewNode('nHingeNode') self.HingeNode.setPos(.8659, 6.5, 5.4) # WRT - ie with respect to. Reparents the object without changing # its position, size, or orientation self.Lid.wrtReparentTo(self.HingeNode) self.HingeNode.setHpr(0, 90, 0) # This sets up an interval to play the close sound and actually close the box # at the same time. self.lidClose = Parallel( self.lidCloseSfx, LerpHprInterval(self.HingeNode, 2.0, (0, 90, 0), blendType='easeInOut')) # Same thing for opening the box self.lidOpen = Parallel( self.lidOpenSfx, LerpHprInterval(self.HingeNode, 2.0, (0, 0, 0), blendType='easeInOut')) # The interval for turning the panda self.PandaTurn = self.Panda.hprInterval(7, (360, 0, 0)) # Do a quick loop and pause to set it as a looping interval so it can be # started with resume and loop properly self.PandaTurn.loop() self.PandaTurn.pause() def setMusicBoxVolume(self): # Simply reads the current value from the slider and sets it in the # sound newVol = self.slider.guiItem.getValue() self.musicBoxSound.setVolume(newVol) def toggleMusicBox(self): #if self.lidOpen.isPlaying() or self.lidClose.isPlaying(): # # It's currently already opening or closing # return if self.boxOpen: self.lidOpen.pause() self.lidClose.start() # Start the close box interval self.PandaTurn.pause() # Pause the figurine turning # Save the current time of the music self.musicTime = self.musicBoxSound.getTime() self.musicBoxSound.stop() # Stop the music self.button['text'] = "Open" # Prepare to change button label else: self.lidClose.pause() self.lidOpen.start() # Start the open box interval self.PandaTurn.resume() # Resume the figuring turning # Reset the time of the music so it starts where it left off self.musicBoxSound.setTime(self.musicTime) self.musicBoxSound.play() # Play the music self.button['text'] = "Close" # Prepare to change button label self.button.setText() # Actually change the button label # Set our state to opposite what it was self.boxOpen = not self.boxOpen #(closed to open or open to closed) # and we can run! mb = MusicBox() base.run()