source: framspy/recording-body-coords.sim @ 1169

Last change on this file since 1169 was 1169, checked in by Maciej Komosinski, 7 months ago

Added a .sim file with a script that records the center of gravity of a creature and the coordinates of all its Parts in each simulation step

File size: 4.0 KB
1# The recording of the "center of gravity" (or mass) of all Parts of a creature during its lifespan, and
2# the recording of coordinates of all Parts are stored as data->bodyrecording.
3# Use STORE_ALL_PART_COORDS below to decide how much data you need recorded - maybe only COG and no Parts.
5# If STORE_ALL_PART_COORDS=0 below, only COG is stored and the format is
6# [ [cog1x,cog1y,cog1z], [cog2x,cog2y,cog2z], [cog3x,cog3y,cog3z], ...]
7# where numbers are simulation steps.
8# So you get a vector of COG x,y,z coordinates repeated for every simulation step.
10# If STORE_ALL_PART_COORDS=1 below, the format is more verbose with one more level of nesting, because after the COG,
11# the list of coordinates of all Parts follows (the first number below is the simulation step, the second is Part number)
12# [ [[cog1x,cog1y,cog1z], [p1_1x,p1_1y,p1_1z], [p1_2x,p1_2y,p1_2z], ...], ...]
14# You can further limit the amount of stored data by recording coordinates less frequently - see onCreaturesStep() comment below.
15# Adjust 'Energy0' to achieve the lifespan you need.
16# 'evalcount' should likely be 1 unless you need other performance criteria (like vertpos or distance) averaged from multiple evaluations.
17# Put this file in the "data" subdirectory within the Framsticks distribution.
24function onBorn(cr)
26        super_onBorn(cr);
27>bodyrecording=[]; //create key and initialize its value in the "data" dictionary
30function onCreaturesStep(cr) //change to onCreaturesUpdate(cr) if you want to record every "perfperiod" steps instead of every single step
32        //super_onCreaturesStep(cr); //there is no onCreaturesStep() defined in parent expdef
33        record(cr);
36function addGenotypePerformanceFromCreature(g, cr) //this function is called twice per one evaluation, see comments in super_addGenotypePerformanceFromCreature(). For each evaluation, it is called once with g.instances=0 and empty (to collect a single copy of and then once again for instances>=0 (to aggregate into according to a custom logic implemented in this function).
38For example for evalcount=3, if we wanted to aggregate vectors by appending them:
39evaluation #1, instances=0: we append [1,2,3] to empty
40evaluation #1, instances=0: we append [1,2,3] to empty
41evaluation #2, instances=0: we append [4,5,6] to empty
42evaluation #2, instances=1: we append [4,5,6] to [1,2,3]
43evaluation #3, instances=0: we append [7,8,9] to empty
44evaluation #3, instances=2: we append [7,8,9] to [1,2,3],[4,5,6]
47        //In the code below, we do not support evalcount>1, i.e. we do not collect more information from more evaluations. The last evaluation wins, so we do not have any "aggregation logic" here.
48        //Simulator.print(g.instances); //for debugging double-calls if we ever wanted to have some aggregation logic (then also display
49        super_addGenotypePerformanceFromCreature(g, cr);
51>bodyrecording =>bodyrecording; //no averaging or any other form of aggregation - here assuming we only evaluate a genotype once; if not, then we ignore (overwrite) recordings from previous evaluations
53        //Simulator.print("Recorded time steps: %d" %>bodyrecording.size); //just for debugging
54        return g;
57function record(cr)
59        const STORE_ALL_PART_COORDS = 1; //set to 0 to significantly reduce the amount of data recorded (will only record COG, not all Parts)
60        if (cr.perf_measuring == 1) //record body position only when the creature is in the "performance measuring" period
61        {
62                var cog = cr.centerOfGravity;
63                cog = [cog.x, cog.y, cog.z];
64                if (STORE_ALL_PART_COORDS)
65                {
66                        var now = [cog];
67                        for (var j=0; j<cr.numparts; j++)
68                        {
69                                var part = cr.getMechPart(j);
70                                now.add([part.x, part.y, part.z]);
71                        }
72              >bodyrecording.add(now);
73                } else
74              >bodyrecording.add(cog);
75        }
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