Team:Cornell/javascripts/mycodraw

From 2013.igem.org

Revision as of 14:01, 18 June 2013

var P_TURN = 0.1; var P_SPLIT = 0.1/256; var P_TRAIL = 0.1; var P_DIE = 0.01; var mc = 0x44; var myc = [mc, mc, mc]; var invertFood = false; var invertMyc = true; var antialias = true; var l = 50; var trailStrength = 0.1; var bleedHue = 0; var overEat = 1;

var w; var h; var food; var draw; var drawi; var drawc; var cx; var cy;

var tips; var trls; var dirs; var trns; var spts; var jins; var tins; var trqs; var trcs; var trailCounts;

var ts;

function mycoDraw() { var canvas = document.getElementById("mycodraw");

if(navigator.userAgent.indexOf('Firefox') != -1) { canvas.style.display = "none"; document.getElementById("fallback").style.display = "block"; return; }

w = canvas.children[0].width; h = canvas.children[0].height; canvas.width = w; canvas.height = h; drawc = canvas.getContext("2d"); drawc.fillStyle = "#F2F2F2"; drawc.fillRect(0, 0, canvas.width, canvas.height); drawi = drawc.getImageData(0, 0, w, h); draw = drawi.data;

var src_canvas = document.createElement('canvas'); src_canvas.width = w; src_canvas.height = h; var foodc = src_canvas.getContext("2d"); foodc.drawImage(canvas.children[0], 0, 0); food = foodc.getImageData(0, 0, w, h).data;

cx = w/2; cy = h/2;

tips = new Array(); trls = new Array(); dirs = new Array(); trns = new Array(); spts = new Array(); jins = new Array(); tins = new Array(); trqs = new Array(); trcs = new Array(); trailCounts = new Array(); ts = new Array();

for(var i = 0; i < 100; i++) { tips.push([Math.random()*w,Math.random()*h]); trls.push(new Array(l)); dirs.push(Math.floor(Math.random()*360)); trns.push(Math.random() > 0.5); spts.push(10); trailCounts.push(0); } var speed = 100; var limit = 0; for(var t = 0; tips.length > 0 && limit < 1000; t = (l > 0 ? (t+1)%l : 0)) { limit++; ts.push(t); setTimeout(updateTips, Math.floor(speed + 0.5)); speed = speed * 0.999; } }

function updateTips() { var t = ts.shift(); for(var i = tips.length-1; i >= 0; i--) { var p = tips[i]; var trl = trls[i]; if(l > 0) trl[t] = p.slice(0); spts[i] = spts[i] - 1;

var vals = colorPoint(p, null, 1.0, dirs[i]); //the main strand-coloring call var out = vals[0]; if(out > 0.45) //turns the tips around if they hit the edge { var dx = p[0] - cx; var dy = p[1] - cy; var theta = Math.floor(Math.abs((Math.atan(dy/dx)/Math.PI)*180)); if(dx > 0 == dy < 0) { theta = 180*(dx > 0 ? 1 : 2) - theta; } if(dx > 0 && dy > 0) { theta = theta + 180; } dirs[i] = theta; } var wp = vals[1]; var ref = [vals[2], vals[3], vals[4]];

if(trailCounts[i] == 0 && Math.random() < P_TRAIL && vals[3] > 0.4 && vals[4] > 0.5 && ( Math.abs(vals[2] - bleedHue) < 0.05 || Math.abs(Math.abs(vals[2]-1.0) - bleedHue) < 0.05) ) { trailCounts[i] = l; jins.push(0); tins.push(t); } else { trailCounts[i] = Math.max(trailCounts[i]-1, 0); }

if(Math.random() < P_TURN*wp*wp*wp*wp) { trns[i] = !trns[i]; } if(Math.random() < P_SPLIT*(wp*256)/(tips.length/50) && spts[i] < 1) { spts[i] = 10; trls.push(trls[i].slice(0)); tips.push(p.slice(0)); dirs.push(dirs[i]); trns.push(!trns[i]); spts.push(10); trailCounts.push(0); } if(out < 0.1 && Math.random() < P_DIE*(1.0-wp)) { tips.splice(i, 1); trls.splice(i, 1); dirs.splice(i, 1); trns.splice(i, 1); spts.splice(i, 1); trailCounts.splice(i, 1); } else { var turn = Math.floor(Math.random()*5); dirs[i] = (dirs[i] + (trns[i] ? turn : -1*turn))%360; var xd = wp*Math.cos(((dirs[i])/180.0)*Math.PI); var yd = wp*Math.sin(((dirs[i])/180.0)*Math.PI); tips[i] = [p[0] + xd, p[1] + yd]; } } if(l > 0) //trail-coloring { for(var i = tins.length - 1; i >= 0; i--) { colorPoint(trqs[i][(tins[i]+(l-1)-jins[i])%l], trcs[i], trailStrength*(1.0-((1.0*jins[i])/(1.0*l))), 0); jins[i] = jins[i]+1; if(jins[i] == l) //this trail is completed { jins.splice(i, 1); tins.splice(i, 1); trqs.splice(i, 1); trcs.splice(i, 1); } } } drawc.putImageData(drawi, 0, 0); }

function colorPoint(p, ref, strength, dir) { var rets = new Array(5); if(p == null) return rets; var dx1 = p[0]-0.5; var dx2 = p[0]+0.5; var dy1 = p[1]-0.5; var dy2 = p[1]+0.5; var x1 = Math.floor(dx1 - (dx1 < 0 ? 1 : 0)); var x2 = Math.floor(dx2 - (dx2 < 0 ? 1 : 0)); var y1 = Math.floor(dy1 - (dy1 < 0 ? 1 : 0)); var y2 = Math.floor(dy2 - (dy2 < 0 ? 1 : 0)); var x = [x2, x1, x1, x2, x1-1, x1, x2, x2+1]; var y = [y2, y2, y1, y1, 0, 0, 0, 0]; var mx = ((x1+x2)/2.0) + 0.5; var my = ((y1+y2)/2.0) + 0.5; var p1 = (dx2-mx)*(dy2-my); var p2 = (mx-dx1)*(dy2-my); var p3 = (dx2-mx)*(my-dy1); var p4 = (mx-dx1)*(my-dy1); var pj = [p1, p2, p3, p4, 0, 0, 0, 0]; if((0 <= dir && dir < 90) || (180 <= dir && dir < 270)) { y[4] = y2; y[5] = y2+1; y[6] = y1-1; y[7] = y1; pj[4] = p2*overEat; pj[5] = p2*overEat; pj[6] = p4*overEat; pj[7] = p4*overEat; } else { y[4] = y1; y[5] = y1-1; y[6] = y2+1; y[7] = y2; pj[4] = p3*overEat; pj[5] = p3*overEat; pj[6] = p1*overEat; pj[7] = p1*overEat; } if(!antialias) { var ps = new Array(); for(var j = 0; j < 4; j++) ps.push(pj[j]); ps.sort(); for(var j = 0; j < 4; j++) if(pj[j] == ps[3]) pj[j] = 1.0; else pj[j] = 0.0; } var rgb = new Array(); var wd = 0.0; var wp = 0.0; if(ref == null) { rgb.push(getPixel(food, x2, y2)); rgb.push(getPixel(food, x1, y2)); rgb.push(getPixel(food, x1, y1)); rgb.push(getPixel(food, x2, y1)); var hue = 0; var saturation = 0; var brightness = 0; for(var j = 0; j < 4; j++) { var hsb = RGBtoHSB(rgb[j]); hue += hsb[0]*pj[j]; saturation += hsb[1]*pj[j]; brightness += hsb[2]*pj[j]; }

rets[2] = hue; rets[3] = saturation; rets[4] = brightness;

var dr = 0; var dg = 0; var db = 0; for(var j = 0; j < 4; j++) { dr += pj[j]*Math.floor(rgb[j][0]); dg += pj[j]*Math.floor(rgb[j][0]); db += pj[j]*Math.floor(rgb[j][0]); } var r = Math.floor(dr); var g = Math.floor(dg); var b = Math.floor(db);

wd = Math.min(256.0, Math.floor(((r + g + b)/3)) + 25.6); wp = wd/256.0;

if(false) wp = 1.0 - wp; //invertFood }

var inside = new Array(8); for(var j = 0; j < 8; j++) { inside[j] = x[j] < w && y[j] < h; inside[j] = inside[j] && x[j] >= 0 && y[j] >= 0;

if(inside[j]) { if(ref == null) // if this is a strand-drawing call { var origColor = getPixel(food, x[j], y[j]); var addColor = addRGB(origColor, myc, pj[j]); var addedColor = subRGB(addColor, origColor, 1.0); var imgd = getPixel(food, x[j], y[j]); for(var k = 0; k < 3; k++) imgd[k] = addColor[k]; setPixel(food, imgd, x[j], y[j]); if(j < 5) { imgd = getPixel(draw, x[j], y[j]); var subbedColor = subRGB(imgd, addedColor, 1.0); for(var k = 0; k < 3; k++) imgd[k] = subbedColor[k]; setPixel(draw, imgd, x[j], y[j]); } } else //if this is a trail-drawing call { var imgd = getPixel(draw, x[j], y[j]); var addedColor = addHSB(imgd, ref, strength); for(var k = 0; k < 3; k++) imgd[k] = addedColor[k]; setPixel(draw, imgd, x[j], y[j]);

} } } var out = 0; for(var j = 0; j < 4; j++) if(!inside[j]) out += 0.25; rets[0] = out; rets[1] = wp; return rets; }

function addRGB(c1, c2, weight) { return [Math.min(c1[0] + Math.floor(c2[0]*weight + 0.5), 0xFF), Math.min(c1[1] + Math.floor(c2[1]*weight + 0.5), 0xFF), Math.min(c1[2] + Math.floor(c2[2]*weight + 0.5), 0xFF)]; }

function subRGB(c1, c2, weight) { return [Math.min(c1[0] - Math.floor(c2[0]*weight + 0.5), 0xFF), Math.min(c1[1] - Math.floor(c2[1]*weight + 0.5), 0xFF), Math.min(c1[2] - Math.floor(c2[2]*weight + 0.5), 0xFF)]; }

function addHSB(cd, cr, weight) { hd = RGBtoHSB(cd); hr = RGBtoHSB(cr); return HSBtoRGB([bleedHue, Math.max((hd[1] + hr[1]*weight)/(1.0+weight), hd[1]), hd[2]]); }

function RGBtoHSB(rgb) { var r = rgb[0]/255; var g = rgb[1]/255; var b = rgb[2]/255; var min = Math.min(r, g, b); var max = Math.max(r, g, b); var del = max - min; var hsb = new Array(3); hsb[2] = max; if(del == 0) { hsb[0] = 0; hsb[1] = 0; } else { hsb[1] = del/max;

var delR = (((max - r)/6) + (del/2))/del var delG = (((max - g)/6) + (del/2))/del var delB = (((max - b)/6) + (del/2))/del

if(r == max) hsb[0] = delB - delG; else if(g == max) hsb[0] = (1/3) + delR - delB; else if(b == max) hsb [0] = (2/3) + delG + delR;

if(hsb[0] < 0) hsb[0] = hsb[0] + 1; if(hsb[0] > 1) hsb[0] = hsb[0] - 1; } return hsb; }

function HSBtoRGB(hsb) { var h = hsb[0]; var s = hsb[1]; var v = hsb[2];

var r = v; var g = v; var b = v;

if(s != 0) { var sh = h*6; if(sh == 6) sh = 0; var hi = Math.floor(sh); var v1 = v * (1 - s); var v2 = v * (1 - s * (sh - hi)); var v3 = v * (1 - s * (1 - (sh - hi)));

if ( hi == 0 ) {r = v; g = v3; b = v1; } else if ( hi == 1 ) {r = v2; g = v; b = v1; } else if ( hi == 2 ) {r = v1; g = v; b = v3; } else if ( hi == 3 ) {r = v1; g = v2; b = v; } else if ( hi == 4 ) {r = v3; g = v1; b = v; } else {r = v; g = v1; b = v2; } } return [Math.floor(r*255), Math.floor(g*255), Math.floor(b*255)]; }

function getPixel(data, x, y) { var i = (x + y*w)*4; return [data[i], data[i+1], data[i+2], data[i+3]]; }

function setPixel(data, pix, x, y) { var i = (x + y*w)*4; for(var j = 0; j < 3; j++) data[i+j] = pix[j]; }

function pausecomp(ms) { ms += new Date().getTime(); while (new Date() < ms){} }