Shadow outline

Revit
21

I was thinking Ill try get the vertical surfaces of the walls, either creating from the edge references or another means that processes ok and then merge them and try project as you have. Seems ok in my head but probably wont work :rofl:

22

Thanks Vikram, I see you can also screen shot a view to with dynamo. So maybe it can all be done in one process. Could be deleted easy but I’ll try figure out a way to ignore shadows not related to buildings too.
image

23

I dont seem to have the module collections. Might be a dynamo 1.3 thing

image

24

So close! just need to get that perimeter of lines and remove the inside ones if thats possible? Starting to get a little slow too…

Joining projected curves of walls to make a surface then solid to get perimeter has worked pretty well almost.

image

Capture
Capture7442×2190 853 KB

25

I have had a look at embedding the creation of Bounding Boxes > Cuboid > Union to create simplified shadows all within Python, and it would seem that it runs a bit faster only outputting shadow edges.
Will give Dynamo 1.3 a go on Monday :+1:

image
image1059×466 13.2 KB

image
image1404×851 84.7 KB

## Import References
import clr
clr.AddReference('RevitAPI')
import Autodesk
from Autodesk.Revit.DB import *

clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

clr.AddReference("RevitAPIUI")
from  Autodesk.Revit.UI import *

doc = DocumentManager.Instance.CurrentDBDocument

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

clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

import collections

# Flattens lists in Python       
def flatten(l):
	for el in l:
		if isinstance(el, collections.Iterable) and not isinstance(el, basestring):
			for sub in flatten(el):
				yield sub
		else:
			yield el
## Converts Dynamo Planes to Revit DB Planes
def getPlane(s):
	s = UnwrapElement(s)
	origin = s.Origin.ToXyz()
	normal = XYZ.BasisZ
	plane = Autodesk.Revit.DB.Plane.CreateByNormalAndOrigin(normal,origin)
	return plane

## Input Revit Elements in Grouped Lists
elem = IN[0]

## Input Dynamo Plane
pl = getPlane(IN[1])

## Input Sunlight Vector
vec = IN[2].ToXyz()

result = []

for el in elem:
	cL = []
	surf = []
	for e in el:
		## Make Box Geometry
		bB = e.BoundingBox
		bC = bB.ToCuboid()
		bS = bC.ToRevitType(TessellatedShapeBuilderTarget.Solid, TessellatedShapeBuilderFallback.Abort)
	
		## Forget Geometry
		bB.Dispose()
		bC.Dispose()
	
		## Create an ExtrusionAnalyser to make a Shadow
		analyzer = ExtrusionAnalyzer.Create(bS[0],pl,vec)

		## Get the Outline of the Shadow and convert to Dynamo Types
		outL = analyzer.GetExtrusionBase()
		eloops = outL.EdgeLoops
		flatloop = flatten(eloops)
		curves = []
		for f in flatloop:
			curves.append(f.AsCurve().ToProtoType())
			## Forget Geometry
			f.Dispose()
		cL.append(curves)
	
	## Create Shadows
	for c in cL:
		pC = PolyCurve.ByJoinedCurves(c)
		sP = Surface.ByPatch(pC)
		surf.append(sP)
	
	refsurfs = flatten(surf)
	sU = Surface.ByUnion(refsurfs)
	pC = Surface.PerimeterCurves(sU)
	result.append(pC)

## Output outline only	
OUT = result
2 Likes
26

awesome, curiously. Does the bounding box only pick up the wall solid. Or will it be bigger for walls that have edited profiles to be smaller? I was trying bounding box to cuboid but ran into that issue. Might actually be a wall on another workset or something

27

Make sure one of those walls is off-axis before you get too far along the cuboid route.