![[OLD SEMESTER] 15-104 • Introduction to Computing for Creative Practice](https://courses.ideate.cmu.edu/15-104/f2022/wp-content/uploads/2023/09/stop-banner.png)
Before we had clocks, we looked to the skies and celestial bodies above to tell time and orientation. For this project, I’ve plotted a night sky with 12 different constellations that appear as the day progresses, with meteor showers occuring every 5 minutes.
Basic Features:
– Stars that twinkle randomly
– Background color based on time of day (lightens as day progresses)
– 12 different constellations (accurate to Northern Hemisphere in August)
– Every hour a new constellation appears
– Meteor showers or ‘shooting stars’ that occur every 5 minutes to indicate the passing of 5 minutes
(Please note that in order to import the star data without using a csv (due to difficulties circumventing CORS policy) the first 495 lines of code are all star + constellation information.)
sketch
// Name: Tsz Wing Clover Chau
// Section: E
// email: ctchau@andrew.cmu.edu
// Project-06
let data = [ //first constellation
[[[-81.30973247, 45.89753673, "L"],
[-69.80657573, 27.25487531, "L"],
[-83.5701992, 13.59553656, "L"],
[-102.9353214, 33.81097102, "M"],
[-81.30973247, 45.89753673, "L"]],
[[-81.30973247, 45.89753673, "L"],
[-83.21194136, 57.57386131, "M"],
[-78.00737768, 70.19871847, "M"],
[-65.52047168, 90.38733495, "M"]],
[[-81.30973247, 45.89753673, "L"],
[-79.00179591, 58.28543518, "S"],
[-72.71622665, 66.82432172, "M"],
[-56.23603836, 80.84899719, "M"]],
[[-69.80657573, 27.25487531, "L"],
[-63.09108408, 24.45143041, "M"],
[-59.33124834, 12.51803871, "S"],
[-53.67504909, 9.38172277 , "S"]],
[[-69.80657573, 27.25487531, "L"],
[-70.35891151, 20.90153254, "M"],
[-70.22649991, 18.78294683, "S"],
[-58.83910175, 0.068773112, "S"],
[-51.8212866, -0.549147718, "S"]],
[[-83.5701992, 13.59553656, "L"],
[-80.88006024, 5.718673925, "S"],
[-80.74322899, 2.504256586, "M"],
[-74.12860005, -9.286504731, "M"],
[-63.76642979, -8.872286463, "M"]]],
// second constellation
[[[39.01312993, 70.78430398, "L"],
[47.35506114, 71.00498999, "L"],
[49.34123524, 60.19137546, "L"],
[43.77750399, 57.0099355 , "M"],
[42.04897812, 50.0771234 , "L"],
[40.28349003, 44.51583592, "M"],
[43.01999656, 36.48286513, "M"]],
[[43.77750399, 57.0099355 , "M"],
[39.01312993, 70.78430398, "L"],
[33.53041101, 86.12662728, "M"],
[30.9148731 , 97.89654786, "M"],
[41.18456465, 84.69474518, "M"],
[50.58589777, 91.84811645, "M"],
[51.67570523, 92.99241428, "M"],
[53.03796456, 104.6533541, "S"],
[55.49003134, 104.2719215, "S"]],
[[85.42531527, 58.66254473, "S"],
[82.46534439, 59.53708159, "M"],
[58.44921701, 58.7298168 , "M"],
[65.24369563, 67.20609705, "M"],
[71.43272565, 81.13141461, "M"],
[68.6072989 , 83.14957657, "S"]],
[[49.34123524, 60.19137546, "L"],
[58.44921701, 58.7298168 , "M"]],
[[41.18456465, 84.69474518, "M"],
[47.35506114, 71.00498999, "L"]],
[[85.42531527, 58.66254473, "S"],
[82.46534439, 59.53708159, "M"],
[58.44921701, 58.7298168 , "M"],
[65.24369563, 67.20609705, "M"],
[71.43272565, 81.13141461, "M"],
[68.6072989 , 83.14957657, "S"]]],
// third constellation
[[[1.458598798, 66.23616304, "L"],
[2.352193916, 60.74930789, "S"],
[4.368337719, 56.17211655, "S"],
[9.653903905, 52.95718454, "S"],
[16.19118114, 51.23449244, "L"],
[15.10294121, 47.50814724, "M"],
[8.564096444, 49.46980066, "S"],
[9.653903905, 52.95718454, "S"]]],
// fourth constellation
[[[-6.590790179, -83.80630313, "L"],
[-0.615323792, -77.31080679, "L"],
[-5.71200542, -76.35517899, "L"],
[-8.064704903, -69.53493942, "L"],
[-13.86042784, -71.60960823, "S"],
[-17.56801424, -70.75267342, "L"],
[-21.50545029, -72.71002812, "S"],
[-20.14209587, -76.22259689, "L"],
[-6.590790179, -83.80630313, "L"]],
[[-13.86042784, -71.60960823, "S"],
[-20.14209587, -76.22259689, "L"]],
[[-5.71200542, -76.35517899, "L"],
[-6.590790179, -83.80630313, "L"]],
[[-5.71200542, -76.35517899, "L"],
[-6.590790179, -83.80630313, "L"]],
[[-8.064704903, -69.53493942, "L"],
[-3.082627727, -63.36904156, "S"]],
[[-17.56801424, -70.75267342, "L"],
[-20.38617647, -63.6192995, "S"],
[-21.99497748, -62.36800982, "S"],
[-25.96335333, -57.61310903, "S"]],
[[-6.590790179, -83.80630313, "L"],
[-5.114574435, -87.96959846, "M"]],
[[-21.50545029, -72.71002812, "S"],
[-31.81704138, -67.75307637, "S"],
[-39.34651974, -70.82585414, "S"],
[-41.38721948, -71.52954371, "S"],
[-40.9202775, -83.68265947, "S"],
[-41.1347843, -84.75519348, "S"],
[-39.40063134, -97.38439895, "S"],
[-27.41782088, -102.2813735, "S"],
[-27.72946212, -102.9794499, "S"]],
[[-39.34651974, -70.82585414, "S"],
[-28.01323318, -94.69202961, "S"]],
[[-20.38617647, -63.6192995, "S"],
[-18.02660164, -62.86852569, "S"]]],
//fifth constellation
[[[51.68313157, -74.59487497, "S"],
[51.85688208, -71.58319946, "S"],
[49.91857688, -50.48883666, "M"],
[54.8517741 , -41.53970748, "M"],
[66.68054428, -49.44026667, "M"],
[64.1863709 , -65.64553098, "M"]],
[[49.91857688, -50.48883666, "M"],
[66.68054428, -49.44026667, "M"]]],
// sixth constellation
[[[-28.25049035, 21.90763427, "L"],
[-29.05237454 , -8.933976793, "M"],
[-30.05337011, -21.79845264, "L"],
[-32.01340999 , -24.46854673, "S"],
[-38.51780667 , -32.31873544, "S"],
[-23.73184394 , -30.50911015, "S"],
[-15.83268968, -18.49868084, "M"],
[-28.47445623, -20.35135353, "M"],
[-6.246178612, 7.80368656 , "L"],
[-7.700470381, 9.046871459, "S"],
[-28.25049035, 21.90763427, "L"]],
[[-28.25049035, 21.90763427, "L"],
[-27.20862688, 15.00847228, "L"],
[-23.75429763, 7.316898561, "M"],
[-19.5234676, -1.520496344, "M"]],
[[-42.86022433, 9.735155491, "M"],
[-35.20115034, 10.69366795, "M"],
[-27.20862688, 15.00847228, "L"],
[-18.11568352, 17.26722891, "M"],
[-13.08553401, 23.52012366, "M"],
[-10.87867391, 24.49114211, "M"]],
[[-15.83268968, -18.49868084, "M"],
[-14.51018108 , -17.07162404, "S"]],
[[-23.73184394 , -30.50911015, "S"],
[-19.20732445 , -40.8800735, "S"],
[-17.88320838 , -42.11591516, "S"]],
[[-8.005402526, 6.677783255, "S"],
[-10.13992754, 6.396307428, "S"],
[-11.87569514, 1.963063164, "S"]]],
//seventh constellation
[[[60.54101784, 2.275816369, "L"],
[48.47102481, 6.48703491 , "M"],
[37.83395909, 9.664913466, "M"],
[37.21603826, 18.80131432, "M"],
[44.145579 , 20.34611639, "M"],
[49.35376885, 12.40142 , "S"],
[60.54101784, 2.275816369, "L"]],
[[49.35376885, 12.40142 , "S"],
[49.08894564, 10.94489233, "S"]],
[[56.89016285, -7.804902645, "S"],
[60.54101784, 2.275816369, "L"],
[66.91639149, 4.836863903, "M"]]],
//eigth constellation
[[[61.03712532, -23.51897245, "M"],
[76.2399394 , -17.85197365, "M"],
[87.20224289, -16.41843998, "M"],
[98.36940576, -2.089490027, "M"],
[108.4602156, -5.991269825, "M"],
[109.69881 , 20.01815869 , "S"],
[119.3328342, 23.67244373 , "S"]],
[[65.55982628, -32.94580699, "M"],
[75.53156455, -30.43924983, "M"],
[98.62336421, -31.35454998, "L"],
[108.4602156, -5.991269825, "M"],
[116.0938088, 1.248421898, "S"]],
[[88.35446325, 6.729849457, "M"],
[98.36940576, -2.089490027, "M"]],
[[76.2399394 , -17.85197365, "M"],
[75.53156455, -30.43924983, "M"]],
[[87.20224289, -16.41843998, "M"],
[98.62336421, -31.35454998, "L"]]],
//ninth constellation
[[[-27.97036149, 97.86651501, "S"],
[-18.94048898, 94.12007854, "S"],
[-9.09408544 , 98.29879614, "S"],
[-10.59327567, 108.0279711, "S"],
[-16.74127398, 119.7956241, "S"]]],
//tenth constellation
[[[5.319571808 , 15.27986704, "S"],
[2.225986467 , 5.831577348, "S"],
[8.997290938 , 6.071090008, "S"],
[11.07069217 , 5.894303006, "M"],
[15.10868883 , 0.099613614, "S"],
[12.50228334 , -7.032641486, "M"],
[8.481085936 , -5.839664643, "S"],
[4.56767671 , -4.368466998, "M"],
[2.171312707 , -2.838674937, "S"],
[-0.355196297, -3.244706657, "S"]],
[[2.171312707, -2.838674937, "S"],
[1.709621983, -1.653668745, "S"]],
[[26.18888289, 16.05781367 , "S"],
[22.33741325, 17.38990091 , "S"],
[19.76011401, 18.25865346 , "S"],
[18.39717201, 13.36557494 , "S"],
[17.32571053, 9.224521115 , "M"],
[19.39550622, 1.749250539 , "M"],
[24.48804677, -8.578746279, "M"],
[26.93450093, -10.89496905, "M"],
[27.19512669, -16.68665272, "M"],
[25.66033052, -20.2774966 , "M"]],
[[12.50228334, -7.032641486, "M"],
[13.73443018, -18.42818892, "S"],
[24.48804677, -8.578746279, "M"]],
[[15.10868883, 0.099613614, "S"],
[19.39550622, 1.749250539, "M"]],
[[11.07069217, 5.894303006, "M"],
[17.32571053, 9.224521115, "M"]]],
// eleventh constellation
[[[12.6209419, -76.17543312, "M"],
[14.31490933, -68.88084874, "M"],
[12.81336171, -67.87981699, "M"],
[14.8154252 , -63.08916507, "M"],
[6.204943095, -29.96074626, "M"],
[8.275577271, -20.3704406, "L"],
[19.03382074, -23.72757948, "M"],
[28.02080187, -31.100746, "M"],
[34.45008626, -37.57453788, "M"]],
[[6.204943095, -29.96074626, "M"],
[5.314500086, -32.52363291, "S"],
[1.666573231, -47.94643484, "M"]],
[[-14.81981548, -29.73185186, "S"],
[-4.719413958, -39.09939645, "M"],
[7.351003499, -51.95056182, "S"],
[8.924053384, -55.20391499, "M"],
[14.03646551, -51.87905955, "S"],
[17.70651702, -55.28452075, "L"]],
[[17.70651702, -55.28452075, "L"],
[28.15534601, -47.71694618, "L"],
[33.53711124, -39.03884973, "M"],
[34.45008626, -37.57453788, "M"]],
[[6.204943095, -29.96074626, "M"],
[1.144487844, -32.23404872, "S"],
[-0.129682563, -32.90009235, "S"],
[0.941778916, -34.00051224, "S"]],
[[19.03382074, -23.72757948, "M"],
[19.93153171, -22.45340907, "S"]]],
// twelth constellation
[[[-44.13070076, -47.56894476, "S"],
[-45.54745045, -50.83836714, "M"],
[-49.22571716, -54.74951485, "S"],
[-48.61759037, -55.6182674 , "S"],
[-57.2778691 , -66.24946712, "S"],
[-60.10329585, -68.26762909, "S"],
[-65.55710623, -64.4554043 , "S"],
[-72.68365623, -58.95743272, "S"],
[-73.28305034, -57.26823116, "S"],
[-75.51715563, -53.29043393, "S"],
[-78.73208764, -46.15219506, "M"],
[-76.00756899, -47.35098326, "S"],
[-68.43340714, -49.53059819, "S"],
[-62.71191797, -51.98266497, "S"],
[-44.13070076, -47.56894476, "S"]]],
// single stars
[[[104.9886578 , 52.44117013 , "M"],
[106.1322829 , 32.59591081 , "M"],
[113.6667542 , 47.59758141 , "M"],
[5.11024982 , -88.47011433 , "M"],
[88.41769489 , -64.89519854 , "M"],
[11.27889721 , -30.50408545 , "M"],
[-3.37534974 , 67.12602697 , "M"],
[35.62895531 , -68.60804233 , "M"],
[40.36506015 , -59.2406066 , "M"],
[43.70513643 , -69.07280707 , "M"],
[42.7175803 , -63.12573704 , "M"],
[42.13375365 , -35.96420913 , "M"],
[39.80992995 , -25.98964281 , "M"],
[34.84245066 , -13.29661451 , "M"],
[35.94287055 , -9.676812218, "M"],
[37.47766673 , -12.74640456 , "M"],
[42.60330677 , -17.49558517 , "M"],
[41.27916704 , -23.18270057 , "M"],
[-19.04817726, -88.46549279 , "S"],
[-21.80293192, -88.17308867 , "S"],
[-22.75709275, -89.55816084 , "S"],
[-23.0636038 , -92.31056828 , "S"],
[-22.43683664, -94.61454593 , "S"],
[-20.48514261, -97.60750188 , "S"],
[-15.55931565, -100.4457165 , "S"],
[-16.74127398, 119.7956241 , "S"],
[-10.59327567, 108.0279711 , "S"],
[-27.97036149, 97.86651501 , "S"],
[-18.94048898, 94.12007854 , "S"],
[-13.27280304, 86.72326807 , "S"],
[-9.09408544 , 98.29879614 , "S"],
[-42.27589132, -9.540592057, "S"],
[-41.9227937 , -11.52676616 , "S"],
[-41.9227937 , -15.76393756 , "S"],
[-43.79845795, -8.625985361, "S"],
[-43.22467432, -10.47974785 , "S"],
[-13.72874433, 9.44562888 , "S"],
[-14.54971549, 8.530832444 , "S"],
[33.94988529 , 13.19588964 , "S"],
[69.46108546 , 23.60510962 , "S"],
[79.9786976 , 12.72308656 , "S"],
[78.64087004 , 34.91748725 , "S"],
[-47.60015863, -30.24429763 , "S"],
[-52.49938807, -35.14352707 , "S"],
[-57.26620591, -18.76862507 , "S"],
[-58.76687078, -15.63488371 , "S"],
[-54.57383658, -12.85423997 , "S"],
[-53.60281813, -13.03078878 , "S"],
[30.93918652 , -55.61717811 , "S"],
[32.58373868 , -57.97675294 , "S"],
[33.97803289 , -60.2648255 , "S"],
[31.22519559 , -62.6959026 , "S"],
[38.07330037 , -58.95429872 , "S"],
[39.8021085 , -61.02328683 , "S"],
[43.94435199 , -54.39176988 , "S"],
[-8.005445306, -105.0033915 , "S"],
[-2.356766173, -104.9318892 , "S"],
[30.67780305 , -85.10779604 , "S"],
[32.46048329 , -84.07571801 , "S"],
[41.77341897 , -87.2819446 , "S"],
[44.06113402 , -90.49632903 , "S"],
[47.24656004 , -81.49026093 , "S"],
[50.3451108 , -83.54630863 , "S"],
[51.67719804 , -82.88026501 , "S"],
[52.33248013 , -98.81150986 , "S"],
[58.84812426 , -95.04691547 , "S"],
[53.56322507 , -95.84327739 , "S"],
[58.64277685 , -86.21382367 , "S"],
[73.95741511 , -83.33540582 , "S"],
[59.67565503 , -74.68175023 , "S"],
[70.24547773 , -69.81673594 , "S"],
[44.55936066 , -74.0157066 , "S"],
[55.68343334 , -24.77410426 , "S"],
[60.08082279 , -32.78235823 , "S"],
[40.16744129 , -22.02126697 , "S"],
[-28.65268571, -34.7891396 , "S"],
[-13.20466495, -40.96834791 , "S"],
[-9.497139968, -45.60275414 , "S"],
[-6.407535816, -46.57377258 , "S"],
[-7.96784617 , -54.24914286 , "S"],
[-0.560136995, -24.5197572 , "S"],
[-10.68766986, -14.29161588 , "S"],
[-10.16641833, -11.42473247 , "S"],
[-4.606402005, -10.72973043 , "S"],
[-0.725973947, -11.97494241 , "S"],
[-25.80629245, -24.41817625 , "S"],
[-71.25040192, -77.43958597 , "S"],
[-64.2745821 , -77.98540056 , "S"],
[-59.91294378, -81.310256 , "S"],
[-62.24452988, -41.89702708 , "S"],
[-71.38093073, -34.2612911 , "S"],
[69.51227912 , 5.467669522, "S"],
[70.549062 , 2.393072019, "S"],
[107.9486287 , 57.55384711 , "S"],
[80.51445449 , 78.84416438 , "S"],
[83.27260918 , 86.91681224 , "S"],
[83.47442537 , 68.88789869 , "S"],
[100.1578976 , 62.90068486 , "S"],
[64.64441402 , 109.6664684 , "S"],
[49.1146577 , 98.60492271 , "S"],
[11.49177673 , 72.23870395 , "S"],
[15.26641233 , 54.31944387 , "S"],
[-6.152714418, 52.61545832 , "S"],
[-17.60771933, 30.85955337 , "S"],
[-15.24825692, 22.06359599 , "S"],
[-22.66330689, 22.15187039 , "S"],
[-22.66330689, 20.65120552 , "S"],
[-33.0796866 , 19.01812904 , "S"],
[-32.63831458, 22.68151682 , "S"],
[-38.37615086, 19.76846147 , "S"],
[-36.56652557, 17.91469898 , "S"],
[-37.096172 , 28.11039269 , "S"],
[-36.21342795, 33.09789653 , "S"],
[-41.37748061, 15.39887846 , "S"],
[-38.50856246, 18.1795222 , "S"],
[-26.84551443, -11.1849741 , "S"],
[-53.76052441, 21.78456178 , "S"],
[-80.19844615, 27.63723148 , "S"],
[-36.86304668, 7.09621255 , "S"],
[-33.02311009, 4.756940835, "S"],
[-31.52244522, 6.390017315, "S"],
[-20.17918426, -5.571164473, "S"],
[-17.48175884, -9.226660678, "S"],
[-26.47267039, -6.22969016 , "S"],
[-24.87874372, -11.90844128 , "S"],
[-25.13676322, -12.61213084 , "S"],
[-50.85272315, 26.86216427 , "S"],
[-48.56412749, 28.44238509 , "S"],
[-54.06765516, 39.77638269 , "S"],
[-48.67310823, 36.77941217 , "S"],
[-48.45514674, 34.32734538 , "S"],
[-43.71448429, 37.92371 , "S"],
[-43.60550354, 35.85307583 , "S"],
[-41.31690787, 40.70271903 , "S"],
[-41.31690787, 38.46861373 , "S"],
[-38.75586034, 40.53924791 , "S"],
[-53.3639135 , 50.0685607 , "S"],
[-47.5289726 , 66.29329569 , "S"],
[-41.48054119, 69.01781434 , "S"],
[-46.54814588, 73.81296717 , "S"],
[-58.31806646, 73.21357306 , "S"],
[-19.90235346, 76.59197619 , "S"],
[-67.85380515, 80.87790581 , "S"],
[-85.70244993, 56.09141573 , "S"],
[-87.95576721, 69.31483029 , "S"],
[-94.77501688, 71.50884975 , "S"],
[-95.24939946, 56.0321179 , "S"],
[-50.36555387, 98.81623761 , "S"],
[-45.91821713, 105.3389982 , "S"],
[-43.30911291, 98.40115285 , "S"],
[-34.65060103, 66.54015533 , "S"],
[35.35434846 , 33.92570089 , "S"],
[41.26219059 , 29.41076463 , "S"],
[30.45760312 , 124.6731233 , "S"],
[15.20672482 , 111.9510896 , "S"],
[6.102884206 , 112.6124797 , "S"],
[1.356437388 , 122.2998998 , "S"],
[-33.24663947, 117.5951965 , "S"],
[-42.97148247, 113.9780293 , "S"],
[-44.75041717, 112.4955837 , "S"],
[-35.97433934, 122.1611289 , "S"],
[-33.36523512, 122.5762136 , "S"],
[-99.20350628, 67.5572706 , "S"],
[-98.72912369, 59.25557535 , "S"],
[-56.51147925, 49.43528664 , "S"],
[-57.9610908 , 47.85962192 , "S"],
[9.815890457 , -91.30950062 , "S"]]]
];
let starDim = [7, 5, 3];
var bgColor;
var meteorShower = false;
let meteorStart = [];
let meteorEnd = [];
let shootOffset = [];
let shootWeight = [];
var shootCount_start = 0;
var shootCount_end = 0;
var n = 200;
var nMeteors;
function setup() {
ellipseMode(CENTER);
createCanvas(480, 480);
frameRate(10);
// each constellation
for (var i = 0; i < data.length; i++){
//lines within constellation
for (var j = 0; j < data[i].length; j++){
// indiv stars within constellation
for (var k = 0; k < data[i][j].length; k++){
star = data[i][j][k];
star[0] = map(star[0], -113, 120, 0, width);
star[1] = map(star[1], -113, 120, 0, height);
var r;
var star = data[i][j][k];
if (star[2] == "L"){
r = starDim[0];
} else if (star[2] == "M"){
r = starDim[1];
} else {
r = starDim[2];
}
star[3] = r;
}
}
}
}
function initiateMeteorShower(){
meteorStart = [];
meteorEnd = [];
shootOffset = [];
//meteor steup
nMeteors = int(random(0, 10))
for (var i = 0; i<nMeteors; i++){
var start;
var end;
var dirX;
var dirY;
//var pathRand = random(0,2)
if (int(random(0,2)) == 0){
start = [0, random(0, height)];
end = [width, random(0, height)];
} else {
start = [random(0, width), 0];
end = [random(0, width), height];
}
meteorStart.push(start);
meteorEnd.push(end);
shootOffset.push(random(2, 15));
shootWeight.push(random(1,4));
}
}
function draw() {
var curTime = (hour()*3600) + (minute()*60) + second();
bgColor = map(curTime, 0, 86400, 0, 255);
background(bgColor);
//every 10 minutes initiate meteor shower
if (minute() %5 == 0){
if (!meteorShower){
initiateMeteorShower();
}
meteorShower = true;
} else {
meteorShower = false;
}
if (meteorShower){
for (var i = 0; i<nMeteors; i++){
shootingStar(meteorStart[i], meteorEnd[i],
shootOffset[i], shootWeight[i]);
//noLoop();
}
}
//go through each constellation, draw lines between each pt
for (var i = 0; i < data.length; i++){ // each constelation
//lines within constellation
for (var j = 0; j < data[i].length; j++){
if (i < hour()%12){
drawConstellation(data[i][j]);
}
// indiv stars within constellation
for (var k = 0; k < data[i][j].length; k++){
drawStars(data[i][j][k]);
twinkle(data[i][j][k]);
}
}
}
}
function drawStars(star){
var r = star[3];
push();
noStroke();
var c = (bgColor+200) %255
fill(c)
circle(star[0], star[1], star[3]*1.5);
pop();
}
function twinkle(star){
//constraining star size
if ((star[2] == "L" & star[3] >= starDim[0]) ||
(star[2] == "M" && star[3] >= starDim[1]) ||
(star[2] == "S" && star[3] >= starDim[2])){
star[3] -= random(0.8, 0.8);
} else {
star[3] += random(-0.8, 0.8);
}
star[3] = abs(star[3]);
}
function drawConstellation(constellation){
var c = (bgColor+200) %255
stroke(c);
beginShape(LINES);
for (var i = 1; i < constellation.length; i++){
vertex(constellation[i-1][0], constellation[i-1][1]);
vertex(constellation[i][0], constellation[i][1]);
}
endShape();
}
function shootingStar(curStar, nextStar, offset, shootWeight){
var dx = (nextStar[0] - curStar[0])/n;
var dy = (nextStar[1] - curStar[1])/n;
if (shootCount_end < n){
shootCount_end ++;
}
if (shootCount_end > offset){
shootCount_start ++;
}
if (shootCount_start == n){
shootCount_end = shootCount_end % n;
shootCount_start = shootCount_start % n;
meteorShower = false;
}
push();
strokeWeight(shootWeight);
var c = (bgColor+200) %255
stroke(c, c, c, 180);
line(curStar[0] + (shootCount_start*dx),
curStar[1] + (shootCount_start*dy),
curStar[0] + (shootCount_end*dx),
curStar[1] + (shootCount_end*dy));
fill(c, c, c, 200);
circle(curStar[0]+ (shootCount_end*dx), curStar[1]+
(shootCount_end*dy), 5);
pop();
}
``