Grid extents alignment based on crop region

Revit
6

Hello @dhilipseshan
I had not considered this scenario :grinning:
try this version

  • Edit 03/02/2022
    fix bug
import clr
clr.AddReference('ProtoGeometry')
import Autodesk.DesignScript.Geometry as DSGeo
from Autodesk.DesignScript.Geometry import *

#import Revit API
clr.AddReference('RevitAPI')
import Autodesk
from Autodesk.Revit.DB import *
import Autodesk.Revit.DB as DB

#import transactionManager and DocumentManager (RevitServices is specific to Dynamo)
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
uidoc = uiapp.ActiveUIDocument
app = uiapp.Application
sdkNumber = int(app.VersionNumber)


clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.GeometryConversion)

def createDatumLine(boundLines, grid):
	gridLine = None
	curveG = grid.Curve.ToProtoType()
	vectGrid = curveG.Direction 
	ptmid = curveG.PointAtParameter(0.5)
	lstPtToLine = []
	for lineBound in boundLines:
		lineBoundDs = lineBound.ToProtoType()
		ptmid = DSGeo.Point.ByCoordinates(ptmid.X, ptmid.Y, lineBoundDs.StartPoint.Z)
		interResultA = ptmid.Project(lineBoundDs, vectGrid)
		interResultB = ptmid.Project(lineBoundDs, vectGrid.Reverse())

		if len(interResultA) > 0:
			lstPtToLine.append(interResultA[0].ToXyz())
		if len(interResultB) > 0:
			lstPtToLine.append(interResultB[0].ToXyz())			

	if len(lstPtToLine) == 2:
		gridLine = Autodesk.Revit.DB.Line.CreateBound(lstPtToLine[0], lstPtToLine[1])
	return gridLine

					
def getBoundLines(bbx, Zvalue = 0):
	lstPt = []
	lstLine = []
	lstPt.append(XYZ(bbx.Min.X, bbx.Min.Y, Zvalue))
	lstPt.append(XYZ(bbx.Max.X, bbx.Min.Y, Zvalue))
	lstPt.append(XYZ(bbx.Max.X, bbx.Max.Y, Zvalue))
	lstPt.append(XYZ(bbx.Min.X, bbx.Max.Y, Zvalue))
	for idx, pt in enumerate(lstPt):
		if idx == 0:
			lstLine.append(Line.CreateBound(lstPt[- 1], pt))
		else:	
			lstLine.append(Line.CreateBound(lstPt[idx - 1], pt))			
	return lstLine		

activView = doc.ActiveView
cropBox = activView.CropBox 


fecGrids = FilteredElementCollector(doc, activView.Id).OfClass(DatumPlane).ToElements()
cutOffset = fecGrids[0].GetCurvesInView(DatumExtentType.ViewSpecific, activView)[0].GetEndPoint(0).Z
fecGrids = [x for x in fecGrids if isinstance(x, DB.Grid)]

outLst = []
boundLines = getBoundLines(cropBox, cutOffset)


TransactionManager.Instance.EnsureInTransaction(doc)
for grid in fecGrids:
	newGLine = createDatumLine(boundLines, grid)
	if newGLine and True:
		grid.SetCurveInView(DatumExtentType.ViewSpecific, activView, newGLine)
		outLst.append(newGLine)

TransactionManager.Instance.TransactionTaskDone()

OUT = outLst

another version here

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