Laser Pointer

A tool for pointing in the scene. The distance from the pointer to the intersecting object is displayed. The following command creates a LaserPointer object:

"""
Left mouse button activates the laser.
Mouse movements control viewpoint orientation.
Arrow Keys control viewpoint position.
"""

import viz
import vizact
import vizshape
import vizinfo
vizinfo.InfoPanel(align=viz.ALIGN_LEFT_BOTTOM)

viz.setMultiSample(4)
viz.fov(60)
viz.go()

# add a background environment
maze = viz.add('maze.osgb')

# add an arrow to represent the tool
arrow = vizshape.addArrow(length=0.2, color = viz.ORANGE)

# initialization code for laserpointer which is a LaserPointer
from tools import laser_pointer
tool = laser_pointer.LaserPointer()

# update code for laserpointer
def update(tool):
    state = viz.mouse.getState()
    if state & viz. MOUSEBUTTON_LEFT:
        tool.shoot()

tool.setUpdateFunction(update)

#Link the laser tool to an arrow
#Then move the arrow in the reference frame of the viewpoint
from vizconnect.util import virtual_trackers
mouseTracker = virtual_trackers.ScrollWheel(followMouse = True)
mouseTracker.distance = 1
arrowLink = viz.link(mouseTracker,arrow)
arrowLink.postMultLinkable(viz.MainView)
viz.link(arrowLink,tool)

import vizcam
vizcam.FlyNavigate()

#Hide the mouse cursor
viz.mouse.setVisible(viz.OFF)

Command	Description
laser_pointer.LaserPointer(displayDistance=True)	displayDistance: When True, displays text with distance information.

Method	Description
<LaserPointer>.shoot()	Draws a ray from the laser pointer to the closest intersecting object.
<LaserPointer>.remove()	Removes the laser pointer.
<LaserPointer>.setUpdateFunction(updateFunction)	Sets the update function that gets called every frame. The update function calls methods on the tool based on the state of input devices.

Laser Pointer

Example