Laplacian deformation Example

Example of using Laplacian deformer

• Python

  Note

  Python API version 3 and later

  from meshlib import mrmeshpy as mm
   
  # Load mesh
  mesh = mm.loadMesh("mesh.stl")
   
  # Construct deformer on mesh vertices
  lDeformer = mm.Laplacian(mesh)
   
  # Find area for deformation anchor points
  ancV0 = mesh.topology.getValidVerts().find_first()
  ancV1 = mesh.topology.getValidVerts().find_last()
  # Mark anchor points in free area
  freeVerts = mm.VertBitSet()
  freeVerts.resize(mesh.topology.getValidVerts().size())
  freeVerts.set( ancV0, True )
  freeVerts.set( ancV1, True )
  # Expand free area
  mm.expand(mesh.topology,freeVerts,5)
   
  # Initialize laplacian
  lDeformer.init(freeVerts,mm.EdgeWeights.CotanWithAreaEqWeight)
   
  shiftAmount = mesh.computeBoundingBox().diagonal()*0.01
  # Fix anchor vertices in required position
  lDeformer.fixVertex( ancV0, mesh.points.vec[ancV0.get()] + mesh.normal(ancV0) * shiftAmount )
  lDeformer.fixVertex( ancV1, mesh.points.vec[ancV1.get()] + mesh.normal(ancV1) * shiftAmount )
   
  # Move free vertices according to anchor ones
  lDeformer.apply()
   
  # Invalidate mesh because of external vertices changes
  mesh.invalidateCaches()
   
  # Save deformed mesh
  mm.saveMesh(mesh,"deformed_mesh.stl")