Use Math.floor instead of Util.roundSymmetric to hit the center of the wave area, see https://github.com/phetsims/wave-interference/issues/242
Use Math.floor instead of Util.roundSymmetric to hit the center of the wave area, see https://github.com/phetsims/wave-interference/issues/242

phetsims/scenery-phet,phetsims/scenery-phet,phetsims/scenery-phet