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#!/usr/bin/env python
###
# Copyright (c) 2002-2007 Systems in Motion
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
import sys
from random import random
from pivy.coin import *
from pivy.sogui import *
import shapescale
def construct_new_marker(v):
markerroot = SoSeparator()
t = SoTranslation()
t.translation = v
markerroot.addChild(t)
kit = ShapeScale()
kit.active = TRUE
kit.projectedSize = 5.0
# create the marker
markersep = SoSeparator()
mat = SoBaseColor()
mat.rgb = (random(), random(), random())
markersep.addChild(mat)
# marker shape should be unit size, with center in (0.0f, 0.0f, 0.0f)
cube = SoCube()
cube.width = 1.0
cube.height = 1.0
cube.depth = 1.0
markersep.addChild(cube)
kit.setPart("shape", markersep)
markerroot.addChild(kit)
return markerroot
def event_cb(viewer, n):
mbe = n.getEvent()
if (mbe.getButton() == SoMouseButtonEvent.BUTTON1 and
mbe.getState() == SoButtonEvent.DOWN):
rp = SoRayPickAction(viewer.getViewportRegion())
rp.setPoint(mbe.getPosition())
rp.apply(viewer.getSceneManager().getSceneGraph())
point = rp.getPickedPoint()
if point == None:
print("\n** miss! **\n", file=sys.stderr)
return
n.setHandled()
p = rp.getCurPath()
for i in range(p.getLength()):
n = p.getNodeFromTail(i)
if n.isOfType(SoGroup.getClassTypeId()):
n.addChild(construct_new_marker(point.getPoint()))
break
def show_instructions():
print("""
This example program demonstrates the use of the ShapeScale nodekit.
Quick instructions:
* place the marker by clicking on a shape with the left mouse button
* hit ESC to toggle back and forth to view mode
* zoom back and forth to see how the markers stay the same size
""")
if __name__ == "__main__":
if len(sys.argv) != 2:
print("\nSpecify an Inventor file as argument.\n", file=sys.stderr)
sys.exit(-1)
window = SoGui.init(sys.argv[0])
ShapeScale.initClass() # init our extension nodekit
ex1 = SoGuiExaminerViewer(window)
input = SoInput()
if not input.openFile(sys.argv[1]):
print("Unable to open file: %s\n" % sys.argv[1], file=sys.stderr)
sys.exit(-1)
root = SoDB.readAll(input)
if root == None:
print("Unable to read file: %s\n" % sys.argv[1], file=sys.stderr)
sys.exit(-1)
show_instructions()
newroot = SoSeparator()
newroot.addChild(root)
# create event callback and marker nodes
sep = SoSeparator()
newroot.addChild(sep)
ecb = SoEventCallback()
ecb.addEventCallback(SoMouseButtonEvent.getClassTypeId(), event_cb, ex1)
sep.addChild(ecb)
ex1.setSceneGraph(newroot)
ex1.setTransparencyType(SoGLRenderAction.SORTED_OBJECT_BLEND)
ex1.setViewing(FALSE)
ex1.show()
SoGui.show(window)
SoGui.mainLoop()
del ex1
sys.exit(0)
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