SequenceFlow layout style

is there any other layouter (like BaseLayouter), which can compute the waypoints of SequenceFlows so they are curved? Something like cubic splines?

var modeler = new BpmnModeler({
  container: canvas,
  additionalModules: [
      layouter: [ 'type', require('diagram-js/lib/layout/BaseLayouter') ]

Nope, there is none like that.

If you provide one we can think of including it.

To get cubic splines I can use some algorithms from draw2d.layout.connection.SplineConnectionRouter, but then I have problems with dragging bendpoints. The connection is recalculated and sharp again. Is there a way how to disable the bendpoints so the connections can’t be manually reshaped?