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Old 01-18-2012, 12:19 PM
Gladsomebeast Gladsomebeast is offline
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Join Date: Mar 2005
Location: Isla Vizta, CA
Posts: 397
PickRect code snippet

Example of window.pickRect that I though could be handy for other folks out in vizland:

Code:
import viz
import vizact

viz.go()

model = viz.add("mini.osg")
viz.MainView.setPosition([0, 1.2, -5])

viz.mouse.setOverride(viz.ON)
vizact.onkeydown(' ', viz.mouse.setOverride, viz.TOGGLE)

print model.getNodeNames()
parts = []
for name in model.getNodeNames():
    part = model.getChild(name)
    part.nodeName = name
    parts.append(part)


#Rectangle Pick 
viz.startLayer(viz.LINE_LOOP)
viz.vertex([0, 0, 0])
viz.vertex([0, 0, 0])
viz.vertex([0, 0, 0])
viz.vertex([0, 0, 0])
box = viz.endLayer(parent=viz.SCREEN)
box.alpha(.8)

firstPoint = [0,0]
def startPickRect():
    global firstPoint
    firstPoint = viz.mouse.getPosition()
    box.setVertex(0, firstPoint+[0])
vizact.onmousedown(viz.MOUSEBUTTON_LEFT, startPickRect)

def updateBoxVisual():
    if viz.mouse.getState() & viz. MOUSEBUTTON_LEFT:
        mouseScreenPos = viz.mouse.getPosition()
        box.setVertex(1, [mouseScreenPos[0],firstPoint[1],0])
        box.setVertex(2, mouseScreenPos+[0])
        box.setVertex(3, [firstPoint[0],mouseScreenPos[1],0])
vizact.onupdate(viz.PRIORITY_DEFAULT, updateBoxVisual)

def endPickRect():
    mouseScreenPos = viz.mouse.getPosition()
    #update box visual
    box.setVertex(1, [mouseScreenPos[0],firstPoint[1],0])
    box.setVertex(2, mouseScreenPos+[0])
    box.setVertex(3, [firstPoint[0],mouseScreenPos[1],0])
    
    rect = firstPoint + mouseScreenPos    
    # Get all nodes within the rectangle
    picked = viz.MainWindow.pickRect(rect)
    for node in picked:
        print node.nodeName
vizact.onmouseup(viz.MOUSEBUTTON_LEFT, endPickRect)
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