Moveable clipping box

[simrus]

Hi

I'd like to create a clipping box like this
http://forum.worldviz.com/showthread.php?t=4507&highlight=clipping

but where I can move (translate and rotate) the clipping box.

I'm struggling to find a solution. Can anyone help?

simon

[Jeff]

Here's an example. Use the left and right arrow keys to move the box:

'''
Move the clip box left and right
with the arrow keys
'''

import viz
import vizact
import vizshape
import vizinfo
viz.go()

vizinfo.InfoPanel()

class MovingClipBox():
def __init__(self,node,center,size):

self.node = node
self.x,self.y,self.z = center
self.sx,self.sy,self.sz = [ v / 2.0 for v in size ]
self.applyClipBox()
self.box = vizshape.addBox(size=size,pos=center,color=viz.RED ,lighting=False)
self.box.polyMode(viz.POLY_WIRE)

def applyClipBox(self):

self.node.clipPlane([1,0,0,self.x-self.sx],num=0)
self.node.clipPlane([-1,0,0,-self.x-self.sx],num=1)
self.node.clipPlane([0,1,0,self.y-self.sy],num=2)
self.node.clipPlane([0,-1,0,-self.y-self.sy],num=3)
self.node.clipPlane([0,0,1,self.z-self.sz],num=4)
self.node.clipPlane([0,0,-1,-self.z-self.sz],num=5)

def getBoxCenter(self):
return [self.x,self.y,self.z]

def setBoxCenter(self,center):
self.x,self.y,self.z = center
self.applyClipBox()
self.box.setPosition(center)

viz.clearcolor(viz.GRAY)
vizshape.addGrid(color=[0.2]*3)
model = viz.add('logo.osgb')

expand = vizact.sizeTo([3,3,3],speed=0.5)
shrink = vizact.sizeTo([1,1,1],speed=0.5)
model.runAction(vizact.sequence(expand,shrink,viz. FOREVER))
model.runAction(vizact.spin(0,1,0,20,viz.FOREVER), pool=1)

BOX_CENTER = [0,2,0]
BOX_SIZE = [2,2,2]
movingClipBox = MovingClipBox(model,center=BOX_CENTER,size=BOX_SIZ E)

import vizcam
vizcam.PivotNavigate(center = BOX_CENTER, distance = 10.0)

def updateClipBox():

x_change = 0
if viz.key.isDown(viz.KEY_LEFT):
x_change -= 0.01
elif viz.key.isDown(viz.KEY_RIGHT):
x_change += 0.01
if x_change != 0:
center = movingClipBox.getBoxCenter()
center[0] += x_change
movingClipBox.setBoxCenter(center)

vizact.onupdate(0,updateClipBox)