Class GenericMemo

A generic Memorizable object that calls a JavaScript function.

Example 1

Make a GenericMemo that prints the angle variable of a simulation into the Terminal output area. Here simRun is an instance of SimRunner.

var angle = sim.getVarsList().getVariable('ANGLE');
var memo = new GenericMemo(()=> println('angle: '+angle.getValue()));
simRun.addMemo(memo);
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This code can be entered as Terminal commands in Pendulum.

Use the following to turn off the GenericMemo:

simRun.removeMemo(memo);
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Example 2

This sets the color of a spring depending on how much it is stretched.

var spring = simList.get('spring1');
var dispSpring = displayList.findSpring(spring);
var memo = new GenericMemo(function() {
  var stretch = Math.max(Math.min(spring.getStretch(), 1), -1);
  if (stretch < 0) {
    dispSpring.setColorCompressed(Util.colorString3(-stretch, 0, 0));
  } else {
    dispSpring.setColorExpanded(Util.colorString3(0, stretch, 0));
  }
});
simRun.addMemo(memo);
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This script can be entered as Terminal commands in Cart + Pendulum with Physics Engine.

Example 3

This stops a simulation after 2 seconds. Clicking the "play" button will then continue the simulation, because once has been set false. To re-enable the behavior, set once to true.

var once = true;
var memo = new GenericMemo(function(){
    if (once && sim.getTime()>2)
      {once=false;simRun.pause()}
});
simRun.addMemo(memo);
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This script can be entered as Terminal commands in any simulation.