Hi there- Im trying to write a script to convert polylines into XML text files for use in another program- Problem is, I can't get the script to iterate my vertex count. Other counts iterate OK (i.e. denseList), just not this one (altIndex)- It cycles through the correct number of vertices in the line, but the count doesn't increase.Any ideas? (I've highlighted the relevant part of the script)# ---------------------------------------------------------------------------
....Header....
# Local variables...
inFC = gp.GetParameterAsText(0)
# Variables to extract information from attribute table
colSuppress = gp.GetParameterAsText(1)
colWidth = gp.GetParameterAsText (2)
colExtrusion = gp.GetParameterAsText(3)
colMaterial = gp.GetParameterAsText (4)
colVertices = gp.GetParameterAsText (5)
out = gp.getParameterAsText(6)
# XML variables needed for formatting
tab = ' '
tabTab = ' ' + ' '
tabTabTab = ' ' + ' ' + ' '
tabTabTabTab = ' ' + ' ' + ' ' + ' '
# List array variables
# List containing values to cycle through for scenery density. Set to the first item initially.
denseList = ['VERY_SPARSE','SPARSE','NORMAL','DENSE','VERY_DENSE']
denseIndex = 0
# Identify the geometry field
desc = gp.Describe(inFC)
shapefieldname = desc.ShapeFieldName
# Create and open output file
outFile = open(out, "w")
# Write XML header
outFile.write('<?xml version="1.0" encoding="iso-8859-1"?>'+ '\n')
outFile.write('<!--Created for VectorLandClass -->'+ '\n')
outFile.write(str('<FSData')+ "\n")
outFile.write(str(tab) + 'version="9.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"'+ '\n')
outFile.write(str(tab) + 'xsi:noNamespaceSchemaLocation="bglcomp.xsd">'+ '\n')
# Create search cursor to search through line features in the input feature class
rows = gp.SearchCursor(inFC)
row = rows.Next()
# Create a
# Enter while loop for each feature/row
while row :
# Create the geometry object 'feat'
feat = row.GetValue(shapefieldname)
# Extract row attributes from precalculated columns in the attribte table accessed via a searchcursor
numVertices = row.GetValue(colVertices)
suppress = row.GetValue(colSuppress)
width = row.GetValue(colWidth)
extru = row.GetValue(colExtrusion)
material = row.GetValue(colMaterial)
line = row.shape
density = denseList[denseIndex]
# define variable firstPnt as the FirstPoint object of the line
firstPnt = line.FirstPoint
# define variable middlePnt as the Centroid object of the line
middlePnt = line.Centroid
# define variable lastPnt as the LastPoint object of the line
lastPnt = line.LastPoint
# Write the first part of the ExtrusionBridge XML tag
outFile.write(str(tab)+ '<ExtrusionBridge' + '\n')
outFile.write(str(tabTab) + 'instanceId="{00000000-0000-0000-0000-000000000000}"' + '\n')
outFile.write(str(tabTab) + 'probability = "0.5"'+ '\n')
outFile.write(str(tabTab) + 'suppressPlatform= "' + str(suppress)+ '"'+ '\n')
outFile.write(str(tabTab) + 'imageComplexity= "'+ str(density) + '"' + '\n')
outFile.write(str(tabTab) + 'roadWidth= "' + str(width) + '"' + '\n')
outFile.write(str(tabTab) + 'extrusionProfile="'+ str(extru) + '"'+ '\n')
outFile.write(str(tabTab) + 'materialSet="' + str(material) + '">'+ '\n')
# Write to the Altitude sample location tag
#gp.AddMessage('<AltitudeSampleLocationList>')
outFile.write(str(tabTab) +'<AltitudeSampleLocationList>'+ '\n')
# Add a message giving a string of the first points coordinates. This is the altitude reference point 1
#gp.AddMessage('<AltitudeSampleLocation lat="' + str(firstPnt.x) + '" lon="' + str(firstPnt.y) +'"/>')
outFile.write(str(tabTabTab) +'<AltitudeSampleLocation' + '\n')
outFile.write(str(tabTabTabTab) + 'lat="' + str(firstPnt.x) + '" \n')
outFile.write(str(tabTabTabTab) + 'lon="' + str(firstPnt.y) +'" />'+ '\n')
# Add a message giving a string of the last points coordinates. This is the altitude reference point 2
#gp.AddMessage('<AltitudeSampleLocation lat="' + str(lastPnt.x) + '" lon="' + str(lastPnt.y) +'"/>')
outFile.write(str(tabTabTab) +'<AltitudeSampleLocation' + '\n')
outFile.write(str(tabTabTabTab) + 'lat="' + str(lastPnt.x) + '" \n')
outFile.write(str(tabTabTabTab) + 'lon="' + str(lastPnt.y) +'" />'+ '\n')
# Add closing tag
#gp.AddMessage('</AltitudeSampleLocationList>')
outFile.write(str(tabTab) + '</AltitudeSampleLocationList>'+ '\n')
# Open the the Polyline point list tag
gp.AddMessage("Feature " + str(row.getvalue(desc.OIDFieldName)) + ":")
gp.AddMessage('This line has ' + str(numVertices) + ' vertices according to the attribute table')
#gp.AddMessage('<PolylinePointList>')
outFile.write(str(tabTab) +'<PolylinePointList>'+ '\n')
# Set the part number to zero initially and set the variable partcount
partnum = 0
partcount = feat.PartCount
while partnum < partcount:
# Print the part number
gp.AddMessage( "Line Part " + str(partnum) + ":")
part = feat.GetPart(partnum)
pnt = part.Next()
pntcount = 0
# Define the altitude list to be used for bridges with over 2 vertices
altList = ['1','2','3','4','5','6','5','4','3','2','1']
altIndex = 0
altitude = altList[altIndex]
# Enter while loop for each vertex depending on the number of vertices
# If bridge only has 2 vertices, construct feature using first, last and centroid and standard alt list
if numVertices == 2:
# write first point set using the firstPnt variable and a standard altitude
#gp.AddMessage('<PolylinePoint latitude="' + str(firstPnt.x) + '" lon="' + str(firstPnt.y) +'" altitude="-1.00"/>')
outFile.write(str(tabTabTab) +'<PolylinePoint' + '\n')
outFile.write(str(tabTabTabTab) + 'latitude="' + str(firstPnt.x) + '"'+ '\n')
outFile.write(str(tabTabTabTab) + 'longitude="' + str(firstPnt.x) + '"' + '\n')
outFile.write(str(tabTabTabTab) + 'altitude="-2M" />' + '\n')
# write mid point set using the middlePnt variable and a standard altitude
#gp.AddMessage('<PolylinePoint latitude="' + str(middlePnt.x) + '" lon="' + str(middlePnt.y) +'" altitude="4.00"/>')
outFile.write(str(tabTabTab) +'<PolylinePoint' + '\n')
outFile.write(str(tabTabTabTab) + 'latitude="' + str(middlePnt.x) + '"' + '\n')
outFile.write(str(tabTabTabTab) + 'longitude="' + str(middlePnt.x) + '"' + '\n')
outFile.write(str(tabTabTabTab) + 'altitude="4M" />' + '\n')
# write last point set using the lastPnt variable and a standard altitude
#gp.AddMessage('<PolylinePoint latitude="' + str(lastPnt.x) + '" lon="' + str(lastPnt.y) +'" altitude="-1.00"/>')
outFile.write(str(tabTabTab) +'<PolylinePoint' + '\n')
outFile.write(str(tabTabTabTab) + 'latitude="' + str(lastPnt.x) + '"' + '\n')
outFile.write(str(tabTabTabTab) + 'longitude="' + str(lastPnt.x) + '"' + '\n')
outFile.write(str(tabTabTabTab) + 'altitude="-2M" />' + '\n')
# If bridge has more than than 2 vertices do something else.
else:
while pnt:
# count number of vertices assign it to verts variable. Do this by checking if pnt exists. If not, counting has finished.
pntcount += 1
# Define the varibles coordX and coordY as the x and y of 'pnt'
coordX = pnt.x
coordY = pnt.y
# Cycle through each vertice and write polyline point tag
#gp.AddMessage('<PolylinePoint latitude="' + str(coordY) + '" lon="' + str(coordX) + ' altitude="' + str(altitude)+ '"/>')
outFile.write(str(tabTabTab) +'<PolylinePoint' + '\n')
outFile.write(str(tabTabTabTab) + 'latitude="' + str(coordX) + '"' + '\n')
outFile.write(str(tabTabTabTab) + 'longitude="' + str(coordY) + '"' + '\n')
outFile.write(str(tabTabTabTab) + 'altitude="' + str(altitude)+ 'M" />'+ '\n')
# Iterate through altitude list
altIndex =+1
if altIndex == 6:
altIndex = 0
pnt = part.Next()
partnum += 1
# Close polyline point list tag
#gp.AddMessage('</PolylinePointList>')
outFile.write(str(tabTab) +'</PolylinePointList>'+ '\n')
# write polylineObjectPlacementList XML
#gp.AddMessage('<PolylineObjectPlacementList>')
outFile.write(str(tabTab) +'<PolylineObjectPlacementList>'+ '\n')
# write placement id guid
#gp.AddMessage('<PolylineObjectPlacement id="{70CE4D5C-D4A2-4AC8-B064-33FEFF87E748}"/>')
outFile.write(str(tabTabTab) +'<PolylineObjectPlacement' + '\n')
outFile.write(str(tabTabTabTab) + 'id="{70CE4D5C-D4A2-4AC8-B064-33FEFF87E748}" />'+ '\n')
# close tag
#gp.AddMessage('</PolylineObjectPlacementList>')
outFile.write(str(tabTab) +'</PolylineObjectPlacementList>'+ '\n')
# close extrusion bridge tag
#gp.AddMessage('</ExtrusionBridge>')
outFile.write(str(tab)+'</ExtrusionBridge>'+ '\n'+ '\n')
# Move search cursor to next row/feature
row = rows.Next()
# iterate through lists
denseIndex=denseIndex+1
if denseIndex == 5:
denseIndex = 0
# Delete the search cursor to avoid locks etc
del rows,row
# close XML
#gp.AddMessage('</FSData>')
outFile.write('</FSData>')
del gp
Thanks in advance.
