The Solar System
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; NETLOGO DEMO-3 ; Computermodel of the Solar System ; Optimized programming code & adjusted scale (optional) ! ; © Drs. Ioannis Guertsonii, 2024 ; ------------------------------------------------------------------------- globals [ ; GLOBAL VARIABLES sun ; sun object ss ; size sun (diameter) xc ; x-coordinate center solar system yc ; y-coordinate center solar system xb ; x-coordinate planet yb ; y-coordinate planet ] turtles-own [ ; TURTLE ATTRIBUTES name ; name planet dfs ; distance from sun ot ; orbit time a ; angle a1 ; angle in 1 day ] to setup ; SETUP BUTTON clear-all if (backImage?) [ ; get background image of the universe (optional) import-drawing "stars.jpg" ] setup-sun ; call sun procedure setup-planets ; call planets procedure reset-ticks end to setup-sun ; SUN PROCEDURE create-turtles 1 [ set shape "circle" set color yellow set ss (5) ; not to scale ! set size ss setxy 0 0 set sun self ] end to setup-planets ; PLANETS PROCEDURE ifelse not(trueScale?) [ ; NO True Scale let planet-data [ ; name, distance from sun (relative), orbit-time (days), color, size (relative) ["Mercury" 4 880 violet 1] ["Venus" 8 225 pink 3] ["Earth" 12 365 green 4] ["Mars" 16 687 red 2] ["Jupiter" 20 4332 brown 8] ["Saturn" 24 10759 grey 7] ["Uranus" 28 30688 cyan 6] ["Neptune" 32 60182 blue 5] ] foreach planet-data [ ?1 -> create-turtles 1 [ set name item 0 ?1 set dfs item 1 ?1 set ot item 2 ?1 set color item 3 ?1 set size (item 4 ?1) / 2 set shape "circle" setxy (ss / 2 + dfs) 0 set label name ] ] ] [ ; TRUE Scale let planet-data [ ; name, distance from sun (AU), orbit-time (days), color, size (diameter) ["Mercury" 0.4 880 violet 0.5] ["Venus" 0.7 225 pink 1.2] ["Earth" 1 365 green 1.3] ["Mars" 1.5 687 red 0.7] ["Jupiter" 5.2 4332 brown 7.15] ; actual size = 14.3 ["Saturn" 9.5 10759 grey 6.0] ; actual size = 12.0 ["Uranus" 19 30688 cyan 5.1] ["Neptune" 30 60182 blue 4.9] ] foreach planet-data [ ?1 -> create-turtles 1 [ set name item 0 ?1 set dfs item 1 ?1 ; Astronomical Unit (AU): 1 AU = 149.6 * 1000000 km set ot item 2 ?1 set color item 3 ?1 set size (item 4 ?1) / 2 ; Actual diameter = size * 10000 km set shape "circle" setxy (ss / 2 + dfs) 0 set label name ] ] ] end to go ; GO BUTTON -> Procedure will be repeated until Button is pushed again tick ; next day ask turtles with [self != sun] [ if ticks > 0 [ pen-down ] set a1 (360 / ot) set a (a + a1) set xb (xc + (ss / 2 + dfs) * cos(a)) ; calculate new position planet set yb (yc + (ss / 2 + dfs) * sin(a)) setxy xb yb ; move to new position ] if (ticks = nrYears? * 365) [ stop ] ; standard stop after entered number of years end
There is only one version of this model, created about 1 month ago by Ioannis Guertsonii.
Attached files
File | Type | Description | Last updated | |
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stars.jpg | jpeg | Background image of the Solar System | about 1 month ago, by Ioannis Guertsonii | Download |
The Solar System.png | preview | Preview for 'The Solar System' | about 1 month ago, by Ioannis Guertsonii | Download |
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