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vtkCombineToolandNormal.py
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vtkCombineToolandNormal.py
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'''
Author: QIN Shuo
Date: 2016/3/31
Organization: RC-MIC (CUHK)
Description:
Function: Combine a coil model with a line (focus, normal)
Filters: Combine 2 poly data // vtkAppendPolyData vtkCleanPolyData
Create a poly source
Compute normal
Mouse select a position (mouse click callback)
Transform a polydata(the focus line)
Function:
Click on a position, the second tool move to that position and record transform matrix.abs
When the render window is closed, new file will be saved
SubSystem:
TMS Navigation
'''
import vtk
import sys
import string
# read stl function
def ReadSTL(filename):
reader = vtk.vtkSTLReader()
reader.SetFileName(filename)
reader.Update()
return reader.GetOutput()
# write stl function
def WriteSTL(filename,stl):
writer = vtk.vtkSTLWriter()
writer.SetFileName(filename)
writer.SetInputData(stl)
writer.Update()
# create a line source, format: vtkPolyData
def CreateLine():
cylinder = vtk.vtkCylinderSource()
cylinder.SetCenter(0,0,0)
cylinder.SetRadius(1.0)
cylinder.SetHeight(200)
cylinder.SetResolution(100)
cylinder.Update()
source = cylinder.GetOutput()
return source
def TransformSTL(src,transform):
trans = vtk.vtkTransformFilter()
trans.SetTransform(transform)
trans.SetInputData(src)
trans.Update()
return trans.GetOutput()
def ConbineSource(coil,line):
# combine 2 source
appendFilter = vtk.vtkAppendPolyData()
appendFilter.AddInputData(coil)
appendFilter.AddInputData(line)
appendFilter.Update()
# remove duplicate points
poly_clean = vtk.vtkCleanPolyData()
poly_clean.SetInputData(appendFilter.GetOutput())
poly_clean.Update()
tri = vtk.vtkTriangleFilter()
tri.SetInputData(poly_clean.GetOutput())
tri.Update()
geometryFilter = vtk.vtkGeometryFilter()
geometryFilter.SetInputData(tri.GetOutput())
geometryFilter.Update()
return geometryFilter.GetOutput()
def Visualize(coil):
line = CreateLine()
line_mapper = vtk.vtkPolyDataMapper()
line_mapper.SetInputData(line)
global line_actor
line_actor = vtk.vtkActor()
line_actor.SetMapper(line_mapper)
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputData(coil)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
global renderer
global interactor
renderer = vtk.vtkRenderer()
renderer.AddActor(actor)
renderer.AddActor(line_actor)
win = vtk.vtkRenderWindow()
win.AddRenderer(renderer)
interactor = vtk.vtkRenderWindowInteractor()
win.SetInteractor(interactor)
def LeftButtonPressEvent(obj,event):
global line_actor
global interactor
global renderer
coor = interactor.GetEventPosition()
print "coordinate is ", coor
interactor.GetPicker().Pick(interactor.GetEventPosition()[0],interactor.GetEventPosition()[1],0,renderer)
picked = interactor.GetPicker().GetPickPosition()
print "position is ",picked
point = interactor.GetPicker().GetSelectionPoint()
print "point is", point
# translation
global transform
transform = vtk.vtkTransform()
transform.Translate(picked)
line_actor.SetUserTransform(transform)
def keyPressEvent(obj,event):
global line_actor
global interactor
global renderer
#key = .GetInteractor().GetKeySym()
key = obj.GetKeySym()
print key
# translation
if key == "h":
print "key is ",key
coor = interactor.GetEventPosition()
print "coordinate is ", coor
interactor.GetPicker().Pick(interactor.GetEventPosition()[0],interactor.GetEventPosition()[1],0,renderer)
picked = interactor.GetPicker().GetPickPosition()
print "position is ",picked
point = interactor.GetPicker().GetSelectionPoint()
print "point is", point
# translation
global transform
transform = vtk.vtkTransform()
transform.Translate(picked)
line_actor.SetUserTransform(transform)
win.Render()
else:
pass
#interactor.AddObserver(vtk.vtkCommand.LeftButtonPressEvent,LeftButtonPressEvent)
interactor.AddObserver(vtk.vtkCommand.KeyPressEvent,keyPressEvent)
win.Render()
interactor.Start()
pass
if __name__ == '__main__':
if len(sys.argv)<2:
print "Input Error: you must input 2 parameters"
print "Para1: Source model file name, a .stl file"
print "Para2: Output model file name, a .stl file"
in_file = "E:/test/QinShuoTShapeM.stl"
out_file = "E:/test/newQinShuoTShapeM.stl"
else:
in_file = sys.argv[1]
out_file = sys.argv[2]
print "Press \"h\" to append the line"
print "Reading STL"
coil = ReadSTL(in_file)
print "Visulizing"
Visualize(coil)
print "Create a line source"
line = CreateLine()
print "Transforming the line source"
t_line = TransformSTL(line,transform)
print "Combing the coil and line"
res = ConbineSource(coil,t_line)
print "Writing to file: "+ out_file
WriteSTL(out_file,res)