Hi! I had fun implementing a spring layout in mondrian. Try: -=-=-=--=-=-=-=--=-=-=-=--= | view | view := MOViewRenderer title: 'Spring layout example'. view interaction refreshLayoutEvery: 30. view shape rectangle size: 15. view nodes: (1 to: 30). view edges: (1 to: 30) from: #yourself to: [:v | v \\ 5]. view springLayout. view open -=-=-=--=-=-=-=--=-=-=-=--= A spring layout was my very first program in Smalltalk, about 10 years ago. It was fun to show it to Michele. Fortunately for me, he spoke French :-) In its actual state, the layout does not scale. If you have more than 100 nodes, it will become very slow. The algorithm complexity is quite bad. I had some ideas on making it a bit more scalable. Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.