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Title	Spin-off of "Contest: Fireworks"
ID	4978418815598592
Created	11 years ago, 1420064236373
Updated	10 years ago, 1433093187231
Code	/* Fireworks (12/31/14) * * Based on "Advanced JS: Games & Visualizations: 3D Shapes" * * This program starts a 3D x/y/z sphere with a very * small radius and then 'explodes' it outward using * weighted average from a central point. The shape * moves a little left/right and spins a little on * the y axis as it comes down. / frameRate(40); var x=[], y=[], z=[]; // xyz point arrays var cnt = 200; // display counter var c1,c2,c3; // colors var d1,d2,d3; // divisors - for change in colors var sp; // spin/angle of the 3d shape var i = 0; // xyz array index var lx, ly, lxi, lyi; // launch x/y and x/y increments var multicolor; // multicolor flag var sparkle; // sparkle flag var rx = function(a) { // rotate around x var cosa = cos(a); var sina = sin(a); for (var n=0; n<i; n++) { var ty = y[n]; y[n] = tycosa - z[n]sina; z[n] = z[n]cosa + tysina; } }; var ry = function(a) { // rotate around y var cosa = cos(a); var sina = sin(a); for (var n=0; n<i; n++) { var tx = x[n]; x[n] = txcosa - z[n]sina; z[n] = z[n]cosa + txsina; } }; var rz = function(a) { // rotate around z var cosa = cos(a); var sina = sin(a); for (var n=0; n<i; n++) { var tx = x[n]; x[n] = txcosa - y[n]sina; y[n] = y[n]cosa + txsina; } }; // initialize colors, spin factor, xyz points, launch vars var initxyz = function() { var t = random(5); if (t<1) {multicolor = true;} else {multicolor = false;} t = random(3); if (t<2) {sparkle = true;} else {sparkle = false;} var t = floor(random(6)); if (t === 0) {c1 = 255; c2 = 150; c3 = 150;} else { if (t === 1) {c1 = 150; c2 = 255; c3 = 150;} else { if (t === 2) {c1 = 150; c2 = 150; c3 = 255;} else { if (t === 3) {c1 = 255; c2 = 255; c3 = 150;} else { if (t === 4) {c1 = 255; c2 = 150; c3 = 255;} else { if (t === 5) {c1 = 150; c2 = 255; c3 = 255;}}}}}} d1 = random(1,5); d2 = random(1,5); d3 = random(1,5); lx = random(-150,-70); ly = random(400,900); sp = random(0.2,0.4); if (frameCount%2 === 0) {sp = -1; lx = -1;} lxi = -lx/175; lyi = -ly/175; //longitude lines of a sphere var r = random(1.2,1.8); // initial radius var pf = floor(random(4)); // factor for # of shape points if (pf === 0) {pf = 12;} else { if (pf === 1) {pf = 15;} else { if (pf === 2) {pf = 20;} else { pf = 30;}}} if (pf === 12) {r += 0.5;} if (pf === 30) {r -= 0.5;} var rf = random(4); // random factor (1/4 start randomly) // poles of the sphere x[0] = rsin(0)sin(0); y[0] = -rcos(0); z[0] = rcos(0)sin(0); x[1] = rsin(0)sin(180); y[1] = -rcos(180); z[1] = rcos(0)sin(180); i = 2; //longitude lines of a sphere for (var n=0; n<360; n+=pf) { for (var m=pf; m<=170; m+=pf) { x[i] = rsin(n)sin(m); y[i] = -rcos(m); z[i] = rcos(n)sin(m); if (rf < 1) { x[i] = random(0.5,1); y[i] = random(0.5,1); z[i] = random(0.5,1); } i++; } } // random starting 'spin' of the shape rx(random(360)); ry(random(360)); rz(random(360)); }; // explode points out along line from center using weighted average var transxyz = function(cx,cy,cz) { for (var n=0; n<i; n+=1) { var tt = 1 + 0.005 + 5/(cntcnt); x[n] = cx + (x[n] -cx) tt; y[n] = cy + (y[n] -cy) tt; z[n] = cz + (z[n] -cz) *tt; y[n] += cnt/35; // gravity } }; translate(width/2,130); noStroke(); var draw = function() { fill(0, 0, 0,cnt); rect(-width/2,-130,width,height); // init if (cnt > 175) { cnt = 1; initxyz(); } // display for (var n=0; n<i; n++) { fill(c1-y[n]/d1, c2-y[n]/d2, c3-y[n]/d3); if (multicolor) { fill(random(255)-y[n]/d1, random(255)-y[n]/d2, random(255)-y[n]/d3); } if (sparkle && cnt > 70) { var t = random(9); if (t < 1) { fill(255, 255, 255); } } ellipse(x[n],y[n],4-z[n]/80,6-z[n]/80); } // launch display fill(255, 255, 150); ellipse(lx,ly,3,4); lx += lxi; ly += lyi; // move transxyz(sp,0,0); ry(-sp/5); cnt++; };
Folds
Fork	false
Key	ag5zfmtoYW4tYWNhZGVteXIXCxIKU2NyYXRjaHBhZBiAgLCoh_vrCAw
Votes	182
Spin-Offs	26
Type	PJS
Width	400
Height	400
User Flagged	false
Origin Scratchpad	{"id":"6166415644819456","title":"Contest: Fireworks","deleted":"false","official":"false"}
Hidden From Hotlist	false
Restricted Posting	false
By Child	false
Author Nick	Phil Fulks
Author Name	phfraf
Author ID	kaid_601674336850790775699252
Author Profile Access	COACH

Archive Data

Added	10 months ago, 1739372302841
Updated	10 months ago, 1739372309692
Source Deleted	unknown