Add a test for BrushTipMover writing to ScatterEvent
Add a test for BrushTipMover writing to ScatterEvent

Bercon/glbrush.js,Oletus/glbrush.js,Bercon/glbrush.js,garg/examplepressure,Oletus/glbrush.js,garg/glbrush.js,garg/examplepressure,garg/glbrush.js,Oletus/glbrush.js,garg/examplepressure,garg/examplepressure,Bercon/glbrush.js,Bercon/glbrush.js,garg/glbrush.js,garg/glbrush.js