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DemoChooser.py
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DemoChooser.py
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'''
DemoChooser.py is a simple user interface for switching between vtk demos.
It contains its own tuio "thread" and gesture functions.
The program will terminate once the user selects a demo and will be relaunched by Visualizer.py when that demo ends.
'''
import vtk
import math
from MultiTouch import CursorTracker
try:
import tuio
except ImportError, ioe:
print >>sys.stderr, """
You have to install PyTUIO and copy it into your $PYTHONPATH.
You can grab a tarball from: http://code.google.com/p/pytuio/
"""
sys.exit(2)
class Sphere:
def __init__(self, center, radius, color):
self.sphere = vtk.vtkSphereSource()
self.sphere.SetCenter(center)
self.sphere.SetRadius(radius)
self.sphere.SetThetaResolution(30)
self.sphere.SetPhiResolution(30)
self.sphereMapper = vtk.vtkPolyDataMapper()
self.sphereMapper.SetInput(self.sphere.GetOutput())
self.sphereActor = vtk.vtkActor()
self.sphereActor.GetProperty().SetColor(color)
self.sphereActor.GetProperty().SetRepresentationToWireframe()
self.sphereActor.VisibilityOff()
self.sphereActor.SetMapper(self.sphereMapper)
class Marker:
def __init__(self, id):
# Create text mapper and 2d actor to display finger position.
self.textMapper = vtk.vtkTextMapper()
self.textMapper.SetInput(id)
self.tprop = self.textMapper.GetTextProperty()
self.tprop.SetFontFamilyToArial()
self.tprop.SetFontSize(30)
self.tprop.BoldOn()
self.tprop.ShadowOn()
self.tprop.SetColor(1, 0, 0)
self.textActor = vtk.vtkActor2D()
self.textActor.VisibilityOff()
self.textActor.SetMapper(self.textMapper)
class DemoChooser:
def __init__(self):
# Create the Renderer, RenderWindow, etc. and set the Picker.
self.ren = vtk.vtkRenderer()
self.renwin = vtk.vtkRenderWindow()
self.renwin.AddRenderer(self.ren)
self.ren.SetViewport(0,0,1,1)
self.iren = vtk.vtkRenderWindowInteractor()
self.iren.SetRenderWindow(self.renwin)
self.propPicker = vtk.vtkPropPicker()
self.iren.SetPicker(self.propPicker)
# blue sphere, will show four spheres when hovered on
self.blueSphere = Sphere((0,0,0), 3.0, (0,0,1))
self.blueSphere.sphereActor.VisibilityOn()
self.greenSphere = Sphere((4,4,0), 1.0, (0,1,0))
self.redSphere = Sphere((4,-4,0), 1.0, (1,0,0))
self.yellowSphere = Sphere((-4,4,0), 1.0, (1,1,0))
self.purpleSphere = Sphere((-4,-4,0), 1.0, (1,0,1))
# Create text mappers and 2d actors to display finger position.
self.fingerMarker1 = Marker("(1)")
self.fingerMarker2 = Marker("(2)")
self.fingerMarker3 = Marker("(3)")
# Add the actors to the renderer, set the background and size
self.ren.AddActor(self.blueSphere.sphereActor)
self.ren.AddActor(self.greenSphere.sphereActor)
self.ren.AddActor(self.redSphere.sphereActor)
self.ren.AddActor(self.yellowSphere.sphereActor)
self.ren.AddActor(self.purpleSphere.sphereActor)
self.ren.AddActor2D(self.fingerMarker1.textActor)
self.ren.AddActor2D(self.fingerMarker2.textActor)
self.propPicker.AddObserver("EndPickEvent", self.Pick)
self.ren.SetBackground(0, 0, 0)
self.renwin.SetSize(680, 460)
#self.renwin.FullScreenOn()
'''
TUIO STUFF
'''
self.tracking = tuio.Tracking('')
self.tracker = CursorTracker(2)
self.pickedDemo = 0
def Start(self):
self.renwin.Render()
self.RunTUIO()
def RunTUIO(self):
while (self.pickedDemo == 0) :
while self.tracking.update():
# read the socket empty
pass
self.tracker.update(self.tracking.cursors())
self.CheckGesture()
def CheckGesture(self):
self.NONE = 0
self.ROTATE = 1
self.PICK = 2
if self.tracker.fingers_detected() == self.NONE:
print "No Fingers Detected"
self.fingerMarker1.textActor.VisibilityOff()
self.fingerMarker2.textActor.VisibilityOff()
self.renwin.Render()
elif self.tracker.fingers_detected() == self.ROTATE:
print "Rotating"
fingerID1 = self.tracker._seen.keys()[0]
fingerPrevCoords = self.tracker._prevCoords[fingerID1]
fingerCurrCoords = self.tracker._coords[fingerID1]
# show finger marker
self.fingerMarker1.textActor.SetPosition(fingerCurrCoords[:2])
self.fingerMarker1.textActor.VisibilityOn()
# hide all other markers
self.fingerMarker2.textActor.VisibilityOff()
self.Rotate(self.ren, self.renwin, self.ren.GetActiveCamera(), fingerPrevCoords[0]/10, fingerPrevCoords[1]/10, fingerCurrCoords[0]/10, fingerCurrCoords[1]/10)
elif self.tracker.fingers_detected() == self.PICK:
print "Picking Mode"
fingerID1 = self.tracker._seen.keys()[0]
fingerID2 = self.tracker._seen.keys()[1]
# show finger markers
self.fingerMarker1.textActor.SetPosition(self.tracker._coords[fingerID1][:2])
self.fingerMarker2.textActor.SetPosition(self.tracker._coords[fingerID2][:2])
self.fingerMarker2.textActor.VisibilityOn()
self.propPicker.PickProp(self.tracker._coords[fingerID2][0], self.tracker._coords[fingerID2][1], self.ren)
def Rotate(self, ren, renwin, camera, startx, starty, curx, cury):
camera.Azimuth(startx-curx)
camera.Elevation(starty-cury)
camera.OrthogonalizeViewUp()
renwin.Render()
def Pick(self, object, event):
pickedSphere = self.propPicker.GetActor()
if pickedSphere == None:
self.Wireframe(self.ren, self.renwin)
elif pickedSphere.GetBounds() == self.blueSphere.sphereActor.GetBounds():
print 'you picked blue'
pickedSphere.GetProperty().SetRepresentationToSurface()
self.blueSphere.sphereActor.VisibilityOn()
self.greenSphere.sphereActor.VisibilityOn()
self.redSphere.sphereActor.VisibilityOn()
self.yellowSphere.sphereActor.VisibilityOn()
self.purpleSphere.sphereActor.VisibilityOn()
elif pickedSphere.GetBounds() == self.greenSphere.sphereActor.GetBounds():
print 'you picked green'
pickedSphere.GetProperty().SetRepresentationToSurface()
self.pickedDemo = 1
elif pickedSphere.GetBounds() == self.redSphere.sphereActor.GetBounds():
print 'you picked red'
pickedSphere.GetProperty().SetRepresentationToSurface()
self.pickedDemo = 2
elif pickedSphere.GetBounds() == self.yellowSphere.sphereActor.GetBounds():
print 'you picked yellow'
pickedSphere.GetProperty().SetRepresentationToSurface()
self.pickedDemo = 3
elif pickedSphere.GetBounds() == self.purpleSphere.sphereActor.GetBounds():
print 'you picked purple'
pickedSphere.GetProperty().SetRepresentationToSurface()
self.pickedDemo = 4
self.iren.Render()
def Wireframe(self, ren, renwin):
actors = ren.GetActors()
actors.InitTraversal()
actor = actors.GetNextItem()
while actor:
actor.GetProperty().SetRepresentationToWireframe()
actor = actors.GetNextItem()
renwin.Render()
def GetPickedDemo(self):
return self.pickedDemo
def Kill(self):
print "Stopping DemoChooser TUIO tracking"
self.tracking.stop()
print "DemoChooser.py Terminated"
self.iren.GetRenderWindow().Finalize()