/** overrides Planktonic.determineNewLoc implements chemotaxis */
protected void determineNewLoc() {
// get the specific soluteGrid
if (chemotaxSolute == null) {
chemotaxSolute =
this._agentGrid.mySim.soluteList[this._agentGrid.mySim.getSoluteIndex(chemoeffector)];
}
if (chemotaxSolute.getValueAt(_location) > chem_threshold) {
chemotax();
} else {
super.determineNewLoc();
}
}
/**
* examines solute grid to determine where to move based on attraction/repulsion to/from a solute
*/
private void chemotax() {
// 1) get the gradient--this will be the direction the particle
// should move in or away from
ContinuousVector direction = chemotaxSolute.getGradient2DNoZ(_location);
if (repellent) {
direction.turnAround();
}
// 2) scale the gradient set the scaled gradient as _movement
_movement = this.getScaledMove(_location, direction, distEachRun);
}