// Solar System Model JavaScript // Keith Enevoldsen, thinkzone.wlonk.com function recalc_all(form) { metric_units = form.units[0].checked size = form.size.value; if (metric_units) { form.diam_units.value = "km"; form.dist_units.value = "km"; form.scale_diam_units.value = "mm"; form.scale_dist_units.value = "m"; // km diam_sun = 1392000; diam_mercury = 4880; diam_venus = 12100; diam_earth = 12760; diam_mars = 6800; diam_ceres = 950; diam_jupiter = 142800; diam_saturn = 120600; diam_uranus = 51200; diam_neptune = 48600; diam_pluto = 2320; // km dist_sun = 0; dist_mercury = 58300000; dist_venus = 108000000; dist_earth = 150000000; dist_mars = 227000000; dist_ceres = 414000000; dist_jupiter = 778000000; dist_saturn = 1430000000; dist_uranus = 2870000000; dist_neptune = 4500000000; dist_pluto = 5910000000; factor0 = size/dist_pluto; mm_per_m = 1000; factor1 = factor0*mm_per_m; factor2 = factor0; } else { form.diam_units.value = "miles"; form.dist_units.value = "miles"; form.scale_diam_units.value = "inches"; form.scale_dist_units.value = "feet"; // miles diam_sun = 865000; diam_mercury = 3031; diam_venus = 7520; diam_earth = 7928; diam_mars = 4217; diam_ceres = 590; diam_jupiter = 88850; diam_saturn = 74900; diam_uranus = 31760; diam_neptune = 30780; diam_pluto = 1430; // miles dist_sun = 0; dist_mercury = 36000000; dist_venus = 67200000; dist_earth = 96000000; dist_mars = 142000000; dist_ceres = 257000000; dist_jupiter = 484000000; dist_saturn = 888000000; dist_uranus = 1790000000; dist_neptune = 2800000000; dist_pluto = 3670000000; factor0 = size/dist_pluto; in_per_ft = 12; factor1 = factor0*in_per_ft; factor2 = factor0; } form.diam_sun.value = diam_sun; form.diam_mercury.value = diam_mercury; form.diam_venus.value = diam_venus; form.diam_earth.value = diam_earth; form.diam_mars.value = diam_mars; form.diam_ceres.value = diam_ceres; form.diam_jupiter.value = diam_jupiter; form.diam_saturn.value = diam_saturn; form.diam_uranus.value = diam_uranus; form.diam_neptune.value = diam_neptune; form.diam_pluto.value = diam_pluto; form.dist_sun.value = dist_sun; form.dist_mercury.value = dist_mercury; form.dist_venus.value = dist_venus; form.dist_earth.value = dist_earth; form.dist_mars.value = dist_mars; form.dist_ceres.value = dist_ceres; form.dist_jupiter.value = dist_jupiter; form.dist_saturn.value = dist_saturn; form.dist_uranus.value = dist_uranus; form.dist_neptune.value = dist_neptune; form.dist_pluto.value = dist_pluto; if (metric_units) { round1 = 2; round2 = 2; form.scale_diam_sun.value = round(factor1*diam_sun, round1); form.scale_diam_mercury.value = round(factor1*diam_mercury, round1); form.scale_diam_venus.value = round(factor1*diam_venus, round1); form.scale_diam_earth.value = round(factor1*diam_earth, round1); form.scale_diam_mars.value = round(factor1*diam_mars, round1); form.scale_diam_ceres.value = round(factor1*diam_ceres, round1); form.scale_diam_jupiter.value = round(factor1*diam_jupiter, round1); form.scale_diam_saturn.value = round(factor1*diam_saturn, round1); form.scale_diam_uranus.value = round(factor1*diam_uranus, round1); form.scale_diam_neptune.value = round(factor1*diam_neptune, round1); form.scale_diam_pluto.value = round(factor1*diam_pluto, round1); form.scale_dist_sun.value = round(factor2*dist_sun, round2); form.scale_dist_mercury.value = round(factor2*dist_mercury, round2); form.scale_dist_venus.value = round(factor2*dist_venus, round2); form.scale_dist_earth.value = round(factor2*dist_earth, round2); form.scale_dist_mars.value = round(factor2*dist_mars, round2); form.scale_dist_ceres.value = round(factor2*dist_ceres, round2); form.scale_dist_jupiter.value = round(factor2*dist_jupiter, round2); form.scale_dist_saturn.value = round(factor2*dist_saturn, round2); form.scale_dist_uranus.value = round(factor2*dist_uranus, round2); form.scale_dist_neptune.value = round(factor2*dist_neptune, round2); form.scale_dist_pluto.value = round(factor2*dist_pluto, round2); } else { round1 = 4; form.scale_diam_sun.value = round(factor1*diam_sun, round1); form.scale_diam_mercury.value = round(factor1*diam_mercury, round1); form.scale_diam_venus.value = round(factor1*diam_venus, round1); form.scale_diam_earth.value = round(factor1*diam_earth, round1); form.scale_diam_mars.value = round(factor1*diam_mars, round1); form.scale_diam_ceres.value = round(factor1*diam_ceres, round1); form.scale_diam_jupiter.value = round(factor1*diam_jupiter, round1); form.scale_diam_saturn.value = round(factor1*diam_saturn, round1); form.scale_diam_uranus.value = round(factor1*diam_uranus, round1); form.scale_diam_neptune.value = round(factor1*diam_neptune, round1); form.scale_diam_pluto.value = round(factor1*diam_pluto, round1); form.scale_dist_sun.value = feet_inches(factor2*dist_sun); form.scale_dist_mercury.value = feet_inches(factor2*dist_mercury); form.scale_dist_venus.value = feet_inches(factor2*dist_venus); form.scale_dist_earth.value = feet_inches(factor2*dist_earth); form.scale_dist_mars.value = feet_inches(factor2*dist_mars); form.scale_dist_ceres.value = feet_inches(factor2*dist_ceres); form.scale_dist_jupiter.value = feet_inches(factor2*dist_jupiter); form.scale_dist_saturn.value = feet_inches(factor2*dist_saturn); form.scale_dist_uranus.value = feet_inches(factor2*dist_uranus); form.scale_dist_neptune.value = feet_inches(factor2*dist_neptune); form.scale_dist_pluto.value = feet_inches(factor2*dist_pluto); } } function round(number, digits) { var a = Math.pow(10,digits); return Math.round(number*a)/a; } function inch_fractions(x) { inches = Math.floor(x); fraction = Math.round((x-inches)*64); return inches + " - " + fraction + "/64 in" } function feet_inches(x) { feet = Math.floor(x); inches = Math.round((x-feet)*12); return feet + " ft " + inches + " in" }