source: experiments/frams/foraminifera/data/scripts/foraminifera.expdef @ 476

expdef:
name:Reproduction of benthic foraminifera
info:~
Basic information about this simulation:
www.framsticks.com/foraminifera

Technical information:
Genes and parameter values which control reproduction are stored in data->genes and data->lifeparams fields.

genes:
genes which are not encoded in Ff genotype:
min_repro_energy - Minimum energy necessary for reproduction
hibernation - Defines foram behavior in the case of no nutrients

lifeparams:
Physiological parameters of foraminifera:
max_energy_level - maximum energy level reached so far
gen - generation: 0 haploid, 1 diploid
species - species: 0 not hibernating 1 hibernating
hibernated - 0/1 foram is/isn't hibernated
reproduce - 0/1 foram isn't/is ready for reproduction 
~
code:~


global nutrientenergywaiting;
global reprocounter;
global colors;
global chambers;
global o;
global max_chamber_energ;
global dir_change;
global movePerStep;

@include "foraminifera.inc"

// -------------------------------- experiment begin --------------------------------

function onExpDefLoad()
{
        // define genotype and creature groups
        GenePools.clear();
        Populations.clear();
        GenePools[0].name = "Unused";

        var pop = Populations[0];
        pop.name = "Forams";
        pop.en_assim = 0;
        pop.nnsim = 0;
        pop.enableperf = 1;
        pop.death = 1;
        pop.energy = 1;
        pop.selfmask = 0x10001;
        pop.othermask = 0x20001;
        //pop.selfmask = 0x20002; pop.othermask = 0x10002;
        pop.perfperiod = 25; 

        pop = Populations.addGroup("Nutrients");
        pop.nnsim = 0;
        pop.enableperf = 0;
        pop.death = 1;
        pop.energy = 1;
        pop.selfmask = 0x20002;
        pop.othermask = 0x10000;
        //pop.othermask = 0x10002;

        pop = Populations.addGroup("ReticulopodiaNutrients");
        pop.nnsim = 0;
        pop.enableperf = 0;
        pop.death = 0;
        pop.energy = 0;
        pop.selfmask = 0x20002;
        pop.othermask = 0x10000;

        //world
        SignalView.mode = 1;
        World.wrldwat = 200;
        World.wrldsiz = micronsToFrams(40000);
        World.wrldbnd = 1;
        ExpParams.stress = 1;
        ExpParams.creath = -0.99; //just above the bottom
        ExpParams.autorestart = 0;

        //time
        ExpParams.secPerStep = 60;
        ExpParams.foramSpeedMmPerMin = 0.05;
        movePerStep = getMovePerStep();

        //ExpParams.visualize = 1; //uncomment to visualize reticulopodia and indicate nutrients positions

        //ExpParams.logging = 1; //uncomment to enable logging simulation parameters to log files

        //reproduction
        ExpParams.foramPop = 10;        
        ExpParams.crossprob = 0;
        ExpParams.mutationprob = 0;
        ExpParams.repro_time = 20;
        reprocounter = 0;

        //morphology
        dir_change = 30000;
        ExpParams.zone1_range = micronsToFrams(1000);
        ExpParams.zone2_range = micronsToFrams(3000);
        init_chambers();
        ExpParams.chamber_proculus_haplo = micronsToFrams(50);
        ExpParams.chamber_difference_haplo = 0.0;
        ExpParams.chamber_proculus_diplo = micronsToFrams(20);
        ExpParams.chamber_difference_diplo = 0.2;
        max_chamber_energ = [Vector.new(), Vector.new()];
        for (var j = 0; j < 2; j++)
        {
                for (var i = 0; i < chambers[0].size; i++)
                {
                        max_chamber_energ[j].add(((energyFromVolume(getProperty(j, "chamber_proculus")) + energyFromVolume(getProperty(j, "chamber_proculus") + (i) * getProperty(j, "chamber_difference")))*(i+1))/2);
                }                                  
        }

        //energetics
        ExpParams.min_repro_energ_haplo = 4;
        ExpParams.min_repro_energ_diplo = 6;

        ExpParams.e_meta = 0.00005; 
        ExpParams.energy_hib = 0.000025;
        ExpParams.energy_move = 0.00005;

        ExpParams.energies0_haplo = max_chamber_energ[0][0] - 0.001*max_chamber_energ[0][0];
        ExpParams.energies0_diplo = max_chamber_energ[1][0] - 0.001*max_chamber_energ[1][0];
        ExpParams.feedtrans = 0.125;
        ExpParams.e_repro_cost_haplo = 0.7; 
        ExpParams.e_repro_cost_diplo = 0.3;

        //nutrients
        ExpParams.nutrientsize = micronsToFrams(10);
        ExpParams.energy_nut = 100 * energyFromVolume(ExpParams.nutrientsize);
        ExpParams.nutrientPop = 1;
        ExpParams.feedrate = 100;
        nutrientenergywaiting = 0;
        ExpState.totaltestedcr = 0;
        ExpState.nutrient = "";
}

@include "standard_placement.inc"

function energyFromVolume(radius)
{
        return 4.0/3.0*Math.pi*Math.pow(radius,3);
}

function getMovePerStep()
{
        return micronsToFrams((ExpParams.foramSpeedMmPerMin/60)*1000)*ExpParams.secPerStep;
}

function micronsToFrams(micrometers)
{
        return micrometers*0.025;
}

function framsToMicrons(framsworldunits)
{
        return framsworldunits/0.025;
}

function getProperty(gen, prop_id)
{
        var ploid = "haplo";
        if (gen == 1) ploid = "diplo";
        return ExpParams.[prop_id + "_" + ploid];
}

function addInitialForam(species, i)
{
        var geno = createForamGenotype(0, species, 0);
        var cr = Populations[0].add(geno);
        cr.name = "Initial creature" + species + "_" + i;
        placeCreatureRandomly(cr, 0, 0);
        cr.energy0 = getProperty(0, "energies0");
        cr.energy = cr.energy0;
        setGenotype({"opt" : 0, "cr" : cr, "species" : species});
}

function onExpInit()
{
        Populations[0].clear();
        Populations[1].clear();
        Populations[2].clear(); //reticulopodia and nutrients

        for (var i = 0; i < ExpParams.foramPop; i++)
        {
                addInitialForam(0, i);  
                addInitialForam(1, i);
        }
        o = Populations[0][0].getMechPart(0).orient.clone();
        ExpState.totaltestedcr = 0;
        nutrientenergywaiting = ExpParams.energy_nut;
}

function onExpLoad()
{
        for (var pop in Populations)
                pop.clear();

        Loader.addClass(sim_params.*);
        Loader.setBreakLabel(Loader.BeforeUnknown, "onExpLoad_Unknown");
        Loader.run();

        Simulator.print("Loaded " + Populations[0].size + " Forams and " + Populations[1].size + " nutrient objects");
}

function onExpLoad_Unknown()
{
        if (Loader.objectName == "org") // saved by the old expdef
        {
                var g = Genotype.newFromString("");
                Loader.currentObject = g;
                Interface.makeFrom(g).setAllDefault();
                Loader.loadObject();
                var cr = Populations[0].add(g);
                if (cr != null)
                {
                        //cr.rotate(0,0,Math.rnd01*Math.twopi);
                        if ((typeof(g.data->genes) == "Vector") && (g.data->genes.size >= 3))
                        {
                                // [x,y,energy]
                                cr.move(g.data->genes[0] - cr.center_x, g.data->genes[1] - cr.center_y, 0);
                                cr.energy = g.data->genes[2];
                        }
                        else
                        {
                                cr.move(Math.rnd01 * World.wrldsiz - cr.center_x, Math.rnd01 * World.wrldsiz - cr.center_y, 0);
                        }
                }
        }
        else if (Loader.objectName == "Creature")
        {
                Loader.currentObject = CreatureSnapshot.new();
                Loader.loadObject();
                Populations[0].add(Loader.currentObject);
        }
}

function onExpSave()
{
        File.writeComment("saved by '%s.expdef'" % Simulator.expdef);

        var tmpvec = [], i;

        for(var cr in Populations[1])
                tmpvec.add([cr.center_x, cr.center_y, cr.energy]);

        ExpState.nutrient = tmpvec;
        File.writeObject(sim_params.*);
        ExpState.nutrient = null; //vectors are only created for saving and then discarded

        for (var cr in Populations[0])
                File.writeObject(cr);
}

// -------------------------------- experiment end --------------------------------

// -------------------------------- foram begin -----------------------------------

function setForamMeta(cr, gen)
{
        //cr.idleen = (ExpParams.e_meta * max_chamber_energ[gen][Math.min(lastChamberNum(cr), max_chamber_energ[gen].size-1)])*ExpParams.secPerStep;
        cr.idleen = (ExpParams.e_meta * cr.energy)*ExpParams.secPerStep;
}

function lastChamberNum(cr)
{
        return cr.numparts-1;
}

function onForamsBorn(cr)
{
        setForamMeta(cr, 1);
        if (ExpParams.visualize == 1)
        {
                var ret = Populations[2].add("//0\np:sh=3,sx=0.01,sy="+ExpParams.zone1_range+",sz="+ExpParams.zone1_range+",ry=1.57,vr=1.0,1.0,1.0");
                cr.data->reticulopodiacreature = ret;
        }
}

function placeRandomlyNotColliding(cr)
{
        var retry = 100; //try 100 times
        while (retry--)
        {
                placeCreatureRandomly(cr, 0, 0);
                if (!cr.boundingBoxCollisions(0))
                        return cr;
        }

        Populations[0].delete(cr);
}

function visualization(cr)
{
        var has_ret = 0;

        if (cr.data->reticulopodiacreature != null)
        {
                if (Populations[2].findUID(cr.data->reticulopodiacreature.uid) != null)
                {
                        has_ret = 1;
                }
        }

        return has_ret;
}

function foramGrow(cr, chamber_num)
{
        if ((chamber_num+1) < chambers[cr.data->lifeparams->species].size)
        {
                var geno = createForamGenotype(cr.data->lifeparams->gen, cr.data->lifeparams->species, chamber_num+1);
                var cr2 = Populations[0].add(geno);

                cr2.energy0 = cr.energy;
                cr2.energy = cr2.energy0;

                setGenotype({"cr" : cr2, "parent_genes" : cr.data->genes, "parent_lifeparams" : cr.data->lifeparams, "opt" : 2});
                cr2.moveAbs(cr.center_x - cr2.size_x / 2, cr.center_y - cr2.size_y / 2, cr.pos_z);
                setForamMeta(cr2, cr2.data->lifeparams->gen);

                if (visualization(cr))
                {
                        Populations[2].delete(cr.data->reticulopodiacreature);
                }
                Populations[0].delete(cr);
        }
}

function stepToNearest(cr)
{
        var p = cr.getMechPart(0);
        var n = cr.signals.receiveSet("nutrient", ExpParams.zone2_range);

        //if signals are received find the source of the nearest
        if (n.size > 0)
        {
                var i;
                var mp;
                var distvec = XYZ.new(0, 0, 0);
                var dist;
                var mindist = 100000000000.0;
                var mindistvec = null;
                var eating = 0;

                for (i = 0; i < n.size; i++)
                {
                        mp = n[i].value.getMechPart(0);
                        distvec.set(mp.pos);
                        distvec.sub(p.pos);
                        dist = distvec.length;
                        if (dist < ExpParams.zone1_range)
                        {
                                if (n[i].value != null)
                                {
                                        energyTransfer(cr, n[i].value);
                                        eating = 1;
                                }
                        }
                        else if (eating == 0 && cr.data->lifeparams->hibernated == 0 && dist < mindist)
                        {
                                mindist = dist;
                                mindistvec = distvec.clone();
                        }
                }

                if (!eating && cr.data->lifeparams->hibernated == 0)
                {
                        mindistvec.normalize();
                        mindistvec.scale(-1*movePerStep);
                        cr.localDrive = mindistvec;
                        moveEnergyDec(cr);
                }

                return 1;
        }
        
        else
        {
                return 0;
        }
}

function moveEnergyDec(cr)
{
        if (cr.data->lifeparams->hibernated == 0)
        {
                //cr.energy_m += (ExpParams.energy_move * max_chamber_energ[cr.data->lifeparams->gen][Math.min(lastChamberNum(cr), (max_chamber_energ[cr.data->lifeparams->gen].size)-1)])*ExpParams.secPerStep;
                cr.energy_m += (ExpParams.energy_move * cr.energy)*ExpParams.secPerStep;
        }
}

function foramMove(cr)
{
        //TODO moving inside sediment?

        //adjustment in z axis
        cr.moveAbs(cr.pos_x, cr.pos_y, 0);

        //are there any nutrients in zone 1 or 2?
        {
                var moved = stepToNearest(cr); //TODO weighted sum of distance and energy
                if (moved==1)
                { 
                        return;
                }
        }

        //no nutrients in zone 2
        var hibernation = 0;
        if (cr.data->lifeparams->gen == 0) hibernation =  cr.data->genes->hibernation;
        else hibernation =  cr.data->genes[0]->hibernation;
        //hibernation
        if (hibernation == 1)
        {
                reverseHib(cr);
                cr.localDrive = XYZ.new(0,0,0);
        }
        //random move
        else if (cr.lifespan%(dir_change/ExpParams.secPerStep) == 0)
        {
                cr.data->lifeparams->dir = randomDir();
                cr.localDrive = cr.data->lifeparams->dir;
                moveEnergyDec(cr);
        }
        else
        {
                cr.localDrive = cr.data->lifeparams->dir;
        }
}

function randomDir()
{
        var dir = (Math.rndUni(-ExpParams.zone2_range, ExpParams.zone2_range), Math.rndUni(-ExpParams.zone2_range, ExpParams.zone2_range), 0);  
        dir.normalize();
        dir.scale(-1*movePerStep);
        return dir;
}

function energyTransfer(cr1, cr2)
{
        cr1.localDrive = XYZ.new(0,0,0);
        var e = ExpParams.feedtrans*ExpParams.secPerStep; //TODO efficiency dependent on age
        e = Math.min(cr2.energy, e) + 0.0000001;
        //Simulator.print("transferring "+e+" to "+cr1.name+" from "+cr2.name+" ("+cr2.energy+")");
        cr2.energy_m = cr2.energy_m + e;
        cr1.energy_p = cr1.energy_p + e;
        if (cr1.data->lifeparams->hibernated == 1)
        {
                reverseHib(cr1);
        }
}

function reverseHib(cr)
{
        if (cr.data->lifeparams->hibernated == 1)
        {
                setForamMeta(cr, cr.data->lifeparams->gen); //unhibernate
        } 
        else
        {
                //cr.idleen = (ExpParams.energy_hib * max_chamber_energ[cr.data->lifeparams->gen][Math.min(lastChamberNum(cr), (max_chamber_energ[cr.data->lifeparams->gen].size)-1)])*ExpParams.secPerStep; //hibernate
                cr.idleen = (ExpParams.energy_hib * cr.energy)*ExpParams.secPerStep; //hibernate
        }
        cr.data->lifeparams->hibernated = 1 - cr.data->lifeparams->hibernated;
}

function onForamsStep(cr)
{
        cr.getMechPart(0).orient.set(o);
        if (visualization(cr))
        {
                cr.data->reticulopodiacreature.moveAbs(cr.center_x-ExpParams.zone1_range, cr.center_y-ExpParams.zone1_range, cr.center_z-ExpParams.zone1_range-getProperty(cr.data->lifeparams->gen, "chamber_proculus"));
        }

        if (deathConditions(cr) == 1)
        {
                Populations[0].kill(cr);
                return;
        }

        foramMove(cr);

        var repro = foramReproduce(cr);
        if (repro == 1)
        {
                return;
        }

        cr.data->lifeparams->max_energy_level = Math.max(cr.energy, cr.data->lifeparams->max_energy_level);
        if  (lastChamberNum(cr) <= chambers[0].size-1)
        {
                if ((cr.data->lifeparams->max_energy_level >= max_chamber_energ[cr.data->lifeparams->gen][lastChamberNum(cr)]))         
                {
                        foramGrow(cr, lastChamberNum(cr)); 
                }       
        }       
}

function deathConditions(cr)
{
        if ((cr.energy <= getProperty(cr.data->lifeparams->species,"e_death_level")) || (Math.rnd01 < ExpParams.hunted_prob))
                return 1;
        else
                return 0;
}

function onForamsDied(cr)
{
        if (visualization(cr))
        {
                Populations[2].delete(cr.data->reticulopodiacreature);
        }
        //fossilization
        var geno = GenePools[0].add(cr.genotype);
        geno.data->genes = cr.data->genes;
        geno.data->lifeparams = cr.data->lifeparams;
        if (ExpParams.logging == 1) Simulator.print("\"" + cr.name + "\" died...");
        ExpState.totaltestedcr++;
}

// --------------------------------foram end -------------------------------------

// -------------------------------- nutrient begin --------------------------------

function createNutrientGenotype(nutrientsize, zone1_range)
{
        return "//0\np:sh=3,sx="+nutrientsize+",sy="+nutrientsize+",sz="+nutrientsize+",ry=1.5,vr=0.0,1.0,0.0";
}

function onNutrientsStep(cr)
{
        cr.moveAbs(cr.pos_x % World.wrldsiz, cr.pos_y % World.wrldsiz, 0.5);
}

function addNutrient()
{
        var cr = Populations[1].add(createNutrientGenotype(ExpParams.nutrientsize, ExpParams.zone1_range));

        cr.name = "Nutrients";
        cr.idleen = 0;
        cr.energy0 = ExpParams.energy_nut;
        cr.energy = cr.energy0;
        cr.signals.add("nutrient");

        cr.signals[0].value = cr;

        placeCreatureRandomly(cr, 0, 0);
        if (ExpParams.visualize == 1)
        {
                var nutsize = ExpParams.nutrientsize*10;
                var nut = Populations[2].add("//0\np:sh=2,sx="+nutsize+",sy="+nutsize+",sz="+nutsize+",ry=1.5,vr=0.0,1.0,0.0");
                cr.data->reticulopodiacreature = nut;
                nut.moveAbs(cr.pos_x-1.5*nutsize, cr.pos_y-1.5*nutsize, 0.5);
        }
}

function onNutrientsDied(cr)
{
        if (visualization(cr))
        {
                Populations[2].delete(cr.data->reticulopodiacreature);
        }
}

function nutrientGrowth()
{
        nutrientenergywaiting = nutrientenergywaiting + 1;
        if (nutrientenergywaiting > ExpParams.feedrate/ExpParams.secPerStep)
        {
                for (var i = 0; i < ExpParams.nutrientPop; i++)
                {    
                        addNutrient();
                }

                nutrientenergywaiting = 0.0;
                Simulator.checkpoint();
        }
}

// -------------------------------- nutrient end --------------------------------

// -------------------------------- step begin --------------------------------

function onStep()
{

        nutrientGrowth();
        if (ExpParams.logging == 1)
        {
                createStatistics();
        }

        //reproduction --------------------------------------------
        reprocounter += 1;
        if (reprocounter*ExpParams.secPerStep > ExpParams.repro_time)
        {
                reprocounter = 0;
                reproduce_parents(0);
                reproduce_parents(1);
        }

        //check for extinction -----------------------------------------------
        if (Populations[0].size == 0)
        {
                if (ExpParams.autorestart)
                {
                        Simulator.print("no more creatures, restarting...");
                        onExpInit();
                }
                else
                {
                        Simulator.print("no more creatures, stopped.");
                        Simulator.stop();
                }
        }
        if (ExpParams.maxSteps > 0)
        {
                if (Simulator.stepNumber >= ExpParams.maxSteps)
                        Simulator.stop();
        }
}

function createStatistics()
{       
        var number = [[0, 0],[0,0]]; // [species][gen]
        var e_inc = [[0, 0],[0,0]];
        var e_nut = 0.0;

        for (var i = 0; i < Populations[0].size; i++)
        {
                var cr = Populations[0].get(i);
                var gen = cr.data->lifeparams->gen;
                var species = cr.data->lifeparams->species;

                number[species][gen] = number[species][gen] + 1; 
                e_inc[species][gen] = e_inc[species][gen] + cr.energy;
        }

        for (var i = 0; i < Populations[1].size; i++)
        {
                var cr = Populations[1].get(i);
                e_nut += cr.energy;
        }

        var log_numbers = [number[1][0], number[1][1], number[0][0], number[0][1], Populations[1].size];
        var log_energies = [e_inc[1][0], e_inc[1][1], e_inc[0][0], e_inc[0][1], e_nut];

        log(log_numbers, "forams_log.txt");
    log(log_energies,  "energies_log.txt");
}

function log(tolog, fname)
{
        var f = File.appendDirect(fname, "forams data"); 
        f.writeString("" + Simulator.stepNumber);
        for (var  i = 0; i < tolog.size; i++)
        {
                f.writeString(";" + tolog[i]);
        }
        f.writeString("\n");
        f.close();
}

// -------------------------------- step end --------------------------------

@include "standard_events.inc"

~

prop:
id:visualize
name:Show reticulopodia and nutrients
type:d 0 1 0
group:Foraminifera

prop:
id:maxSteps
name:Stop after the given number of simulation steps
type:d 0 1000000 0

prop:
id:foramSpeedMmPerMin
name:Speed of foraminfera in mm/min
type:f 0.1
flags: 16
group:Foraminifera

prop:
id:secPerStep
name:Seconds per simulation step
type:f 60.0
flags: 16
group:Foraminifera

prop:
id:e_repro_cost_haplo
name:Cost of reproduction
type:f 0.1 0.9 0.5
group:Foraminifera

prop:
id:e_repro_cost_diplo
name:Cost of reproduction
type:f 0.1 0.9 0.3
group:Foraminifera

prop:
id:chamber_proculus_haplo
name:Size of proculus
type:f
group:Foraminifera

prop:
id:chamber_proculus_diplo
name:Size of proculus
type:f
group:Foraminifera

prop:
id:chamber_difference_haplo
name:Difference in size between subsequent chambers
type:f
group:Foraminifera

prop:
id:chamber_difference_diplo
name:Difference in size between subsequent chambers
type:f
group:Foraminifera

prop:
id:hunted_prob
name:Probability of being hunted
type:f 0 1 0
group:Forminifera

prop:
id:zone1_range
name:Zone 1 range 
type:f 0 200
group:Foraminifera

prop:
id:zone2_range
name:Zone 2 range
type:f 0 3000
group:Foraminifera

prop:
id:colors
name:Haploid and diploid colors
type:x
group:Foraminifera

prop:
id:min_repro_energ_haplo
name:Min reproduction energy of forams
type:f
group:Foraminifera

prop:
id:min_repro_energ_diplo
name:Min reproduction energy of forams
type:f
group:Foraminifera

prop:
id:repro_prob
name:Probability of reproduction
type:f 0 1 0.8
group:Foraminifera

prop:
id:energies0_haplo
name:Energy of offspring from diploid forams
type:f
group:Foraminifera

prop:
id:energies0_diplo
name:Energy of offspring from diploid forams
type:f
group:Foraminifera

prop:
id:e_death_level_haplo
name:Minimal level of energy to sustain life of haploid
type:f 0 20 4
group:Foraminifera

prop:
id:e_death_level_diplo
name:Minimal level of energy to sustain life of diploid
type:f 0 20 0.25
group:Foraminifera

prop:
id:energy_hib
name:Energy used for hibernation during one step
type:f 0 1 0.001
group:Foraminifera

prop:
id:energy_move
name:Energy used for movement during one step
type:f 0 20 0.001
group:Foraminifera

prop:
id:min_vol
name:Minimal volume for reproduction
type:f 100 900 100
group:Foraminifera

prop:
id:max_size
name:Maximal size
type:d 1 10 5 
group:Foraminifera

prop:
id:foramPop
name:Initial forams population size
type:d 1 1000 100
group:Foraminifera

prop:
id:crossprob
name:Crossover probability
type:f 0 1 0
group:Foraminifera

prop:
id:mutationprob
name:Mutation probability
type:f 0 1 0
group:Foraminifera

prop:
id:e_meta
name:Idle metabolism
type:f 0 1
group:Energy
help:Each stick consumes this amount of energy in one time step

prop:
id:feedrate
name:Feeding rate
type:f 0 1000000
group:Energy
help:How fast energy is created in the world

prop:
id:energy_nut
name:Nutrient energy
type:f 0 1000
group:Energy

prop:
id:feedtrans
name:Ingestion multiplier
type:f 0 100
group:Energy

prop:
id:nutrientsize
name:Nutrient size
type:f 0.1 0.9 0.1
group:Energy

prop:
id:nutrientPop
name:Nutrient population size
group:Energy
type:d 1 1000 10

prop:
id:stress
name:Environmental stress
type:d 0 1 1
group:World

prop:
id:repro_trigger
name:Reproduction trigger
type:d 0 1 1
group:World

prop:
id:repro_time
name:Time before reproduction
type:d 0 10000

prop:
id:creath
name:Creation height
type:f -1 50
help:~
Vertical position (above the surface) where new Forams are revived.
Negative values are only used in the water area:
  0   = at the surface
-0.5 = half depth
-1   = just above the bottom~

state:
id:nutrient
name:Nutrient locations
help:vector of vectors [x,y,energy]
type:x
flags:32

prop:
id:autorestart
name:Restart after extinction
help:Restart automatically this experiment after the last creature has died?
type:d 0 1

state:
id:notes
name:Notes
type:s 1
help:~
You can write anything here
(it will be saved to the experiment file)~

state:
id:totaltestedcr
name:Evaluated Forams
help:Total number of the Forams evaluated in the experiment
type:d
flags:16

prop:
id:logging
name:Log statistics to file
type:d 0 1 0