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Example: Curve Visualization

Demo: Visualize curves and edges in 3D view Script: visualization_curve_script.py Time: 1-2 minutes

What It Demonstrates​

  • Pick edges from elements
  • Extract location curves from walls
  • Generate lines, arcs, and splines
  • Display geometry in 3D view without creating model elements

Key Pattern: Pick & Visualize Edge​

from Autodesk.Revit.UI.Selection import ObjectType

print("Select an edge...")
ref = uidoc.Selection.PickObject(ObjectType.Edge, "Select an edge")

elem = doc.GetElement(ref)
edge = elem.GetGeometryObjectFromReference(ref)

if edge:
    print(edge)  # Auto-visualized in 3D view

Result:

  • User picks edge in Revit
  • Edge highlighted in 3D view
  • Color-coded for visibility

Key Pattern: Wall Location Curves​

from Autodesk.Revit.DB import FilteredElementCollector, Wall

walls = FilteredElementCollector(doc).OfClass(Wall).ToElements()

print(f"Visualizing {len(walls)} wall location curves...")
for wall in walls:
    curve = wall.Location.Curve
    print(curve)  # Each curve appears in 3D

Result:

  • All wall centerlines displayed
  • No model elements created
  • Clearable with "Clear" button

Key Pattern: Generate Geometry​

from Autodesk.Revit.DB import XYZ, Line, Arc

# Create lines
origin = XYZ(0, 0, 0)
end_point = XYZ(10, 10, 0)
line = Line.CreateBound(origin, end_point)
print(line)

# Create arc
center = XYZ(0, 0, 0)
radius = 5
arc = Arc.Create(center, radius, 0, Math.PI, XYZ.BasisX, XYZ.BasisY)
print(arc)

Result:

  • Geometry generated programmatically
  • Displayed immediately
  • Useful for debugging calculations

Try It Yourself​

  1. Load folder: samples/PythonDemo/commands/
  2. Execute visualization_curve_script.py
  3. Pick edges when prompted (or ESC to skip)
  4. See geometry in 3D view

Full source: visualization_curve_script.py