quake.js

const earthRadius = 6731.0;
function Quake(lat,lon,depth,time,size,verified) {
	this.lat = lat;
	this.lon = lon;
	this.depth = depth;
	this.time = time;
	this.size =size;
	this.verified = verified;
};

Quake.prototype.color = function(currentTime) {
	var hours = (time - this.time ) / ( 1000*60*60);
		if (this.size >= 3 && animParams.greenGiant ) {
			return [0.0, 1.0, 0.0 ,1.0 ];
		}
		if ( hours <= 4.0 ) {
			return [ 1.0, 0.0, 0.0, 1.0]; // "#f00";
		} else if(hours <= 12) {
			return [ 1.0, 0.4, 0.0, 1.0]; //"#f60";
		}
		else if(hours <= 24) {
			return [ 1.0, 1.0, 0.0, 1.0]; // "#ff0";
		}
		else if(hours <= 36) {
			return [ 0.2, 0.4, 0.8, 1.0]; // "#36c";
		}
		else {
			return [ 0.0, 0.0, 0.4, 1.0]; // "#006";
		}
};
function calculatePositions(qList,animParams) {
	var params={};
	var M=0;
	var mr = vec3.create([0,0,0]);
	for(i in qList) {
		var q  = qList[i];

		qList[i].pos = sphere2Cart(q.lat, q.lon, earthRadius - animParams.depthScale*q.depth)

		if(q.time < params.firstTime || params.firstTime == null) {
			params.firstTime=q.time;
		}
		if(q.time > params.lastTime || params.lastTime == null) {
			params.lastTime=q.time;
		}
		M += q.size;
		vec3.add(mr,[q.pos[0]*q.size,q.pos[1]*q.size,q.pos[2]*q.size]);

	}
	params.centerOfMass=[
		mr[0]/M,
		mr[1]/M,
		mr[2]/M,
	]
	params.duration = params.lastTime - params.firstTime;
	qList.sort(function(a,b){return b.time-a.time});
	return params;
};