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#!/usr/bin/env python
import sys
import vtk
from vtk.test import Testing
# Quad
pts = vtk.vtkPoints()
pts.SetNumberOfPoints(6)
coords = [(0,0,0),(2,0,0),(4,0,0),(0,4,0),(2,4,0),(4,4,0)]
for i in range(0,6):
pts.InsertPoint(i,coords[i])
quads = vtk.vtkCellArray()
cellpoints=[(0,1,4,3),(1,2,5,4)]
for i in range(0,2):
quads.InsertNextCell(4)
for j in range(0,4):
quads.InsertCellPoint(cellpoints[i][j])
poly = vtk.vtkPolyData()
poly.SetPoints(pts)
poly.SetPolys(quads)
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputData(poly)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
ren = vtk.vtkRenderer()
ren.AddActor(actor)
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
renWin.SetSize(200,200)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
renWin.Render()
iren.Initialize()
pos = [ (1,1), (35,40), (80,40), (120,40), (165,40),
(199,160),(165,160),(120,160),(80,160), (35,160) ]
pickedCells = [ -1, 0, 0, 1, 1,
-1, 1, 1, 0, 0 ]
pickedPoints= [ -1, 0, 1, 1, 2,
-1, 5, 4, 4, 3 ]
cellErrors = 0
pointErrors = 0
cellPicker = vtk.vtkCellPicker()
for i in range(0,len(pos)):
cellPicker.Pick(pos[i][0],pos[i][1],0,ren)
if cellPicker.GetCellId() != pickedCells[i]:
print("pos [{0}] : picked cell id={1} expected cell id={2}".format(pos[i],cellPicker.GetCellId(),pickedCells[i]))
cellErrors = cellErrors + 1
if cellPicker.GetPointId() != pickedPoints[i]:
print("pos [{0}] : picked point id={1} expected point id={2}".format(pos[i],cellPicker.GetPointId(),pickedPoints[i]))
pointErrors = pointErrors + 1
if pointErrors or cellErrors:
print( "ERROR: Cell picker : {0} cell-id errors, {1} point-id errors".format(cellErrors,pointErrors) )
sys.exit(1)
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