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@Nesciosquid Nesciosquid/spiralScan.js Secret

Last active Feb 25, 2016
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Spiral Scan Simulation
var laserRadius = 10;
var sensorRadius = 5;
var sensorPosition1 = new Point(project.view.center);
sensorPosition1.x += 20;
sensorPosition1.y -= 60;
var sensorPosition2 = new Point(project.view.center);
sensorPosition2.x -= 10;
var sensorPosition3 = new Point(project.view.center);
sensorPosition3.x -=15;
sensorPosition3.y += 30;
var laserColor = "#EF9A9A";
var spiralPathWidth = 20;
var spiralPathStart = project.view.center;
var radius = laserRadius * 10;
var awayStep = laserRadius;
var coils = Math.round(radius/awayStep);
var thetaMax = coils * 2 * Math.PI;
var chord = laserRadius/2;
var laserSpeed = 40 * laserRadius; // per second
var totalScanTime = 0;
var timePoints = [];
var frameCounter = 0;
var startTime = 0;
var spiralPath;
var laserCircle;
var finished = false;
var allSensors = [];
function Sensor(position){
this.position = position;
this.paperObject = new Path.Circle(position, sensorRadius);
this.paperObject.insertAbove(laserCircle);
this.paperObject.fillColor = 'black';
this.detections = [];
this.startDetectionTime = -1;
this.getDetectionTimes = function(){
var times = [];
while (this.detections.length != 0){
if (this.detections.length %2 != 0){
return [];
}
var diff = (this.detections[0] - this.detections[this.detections.length-1]);
var time = totalScanTime - (diff/2);
this.detections.splice(0,1);
this.detections.splice(this.detections.length-1, 1);
times.push(time);
}
return times;
}
this.checkSensor = function(laserObject){
if (laserObject.contains(this.position)){
this.startDetectionTime = getTime();
this.paperObject.fillColor = 'white';
} else {
if (this.startDetectionTime != -1){
var endTime = getTime();
var avg = (this.startDetectionTime + endTime)/2;
this.detections.push(avg);
this.startDetectionTime = -1;
this.paperObject.fillColor = 'black';
}
}
}
}
function getSpiralPosition(angle, distance){
var x = distance * angle * Math.cos(angle);
var y = distance * angle * Math.sin(angle);
return new Point(x,y);
}
function generateSpiralPoints(){
var theta = chord/awayStep;
while (theta < thetaMax){
var distance = awayStep * (theta / (2 * Math.PI));
var x = spiralPathStart.x + Math.cos(theta) * distance;
var y = spiralPathStart.y + Math.sin(theta) * distance;
theta += chord/distance;
timePoints.push(new Point(x,y));
}
totalScanTime = chordsToTime(timePoints.length);
}
function chordsToTime(chordCount){
var distance = chordCount * chord;
var time = distance / laserSpeed;
var timeMillis = time * 1000.0;
return timeMillis;
}
function timeToChords(time){
var timeSeconds = time / 1000.0;
var traveled = timeSeconds * laserSpeed;
var chords = traveled / chord;
return chords;
}
function getLowerTimepointBound(chords){
var floor = Math.floor(chords);
if (floor > timePoints.length -1){
floor = timePoints.length - 1 - (floor - timePoints.length);
}
if (floor < 0){
floor = 0;
}
return timePoints[floor];
}
function getUpperTimepointBound(chords){
var ceil = Math.ceil(chords);
if (ceil > timePoints.length -1){
ceil = timePoints.length - 1 - (ceil - timePoints.length);
}
if (ceil < 0){
ceil = 0;
if (!finished){
finish();
finished = true;
}
}
return timePoints[ceil];
}
function getRatio(chords){
var floor = Math.floor(chords);
var remainder = chords - floor;
return remainder;
}
function linearInterpolation(pointA, pointB, ratio){
return (pointA * (1-ratio) + pointB * (ratio));
}
function getSpiralPosition(time){
var chords = timeToChords(time);
return linearInterpolation(getLowerTimepointBound(chords), getUpperTimepointBound(chords), getRatio(chords));
}
function drawSpiral(){
var spiral = new Path();
spiral.strokeWidth = 1;
spiral.strokeColor = 'black';
for (var i =0; i < 100; i++){
spiral.add(getSpiralPosition(i));
}
}
function drawTimeSpiral(){
var spiral = new Path();
for (var i = 0; i < timePoints.length; i++){
spiral.add(timePoints[i]);
}
spiral.strokeColor = "black";
spiral.strokeWidth = 1;
}
function getTime(){
var date = new Date();
return date.getTime();
}
function startFrameSpiral(){
startTime = getTime();
spiralPath = new Path();
spiralPath.strokeColor = laserColor;
spiralPath.strokeWidth = laserRadius*2;
spiralPath.add(spiralPathStart);
spiralStart = new Path.Circle(spiralPathStart, laserRadius);
spiralStart.fillColor = laserColor;
laserCircle = new Path.Circle(spiralPathStart, laserRadius);
laserCircle.strokeWidth = 2;
laserCircle.strokeColor = 'black';
laserCircle.fillColor = laserColor;
}
function onFrame(){
var time = getTime() - startTime;
var pos = getSpiralPosition(time);
spiralPath.add(pos);
laserCircle.position = pos;
checkSensors(laserCircle);
}
function checkSensors(laserObject){
for (var i in allSensors){
var sensor = allSensors[i];
sensor.checkSensor(laserObject);
}
}
function resolveSensors(){
for (var i in allSensors){
var sensor = allSensors[i];
plotGuesses(sensor.getDetectionTimes());
}
}
function plotGuesses(times){
for (var i in times){
var time = times[i];
var pos = getSpiralPosition(time);
var circle = new Path.Circle(pos, laserRadius);
circle.strokeColor = 'blue';
circle.strokeWidth = 1;
}
}
function finish(){
resolveSensors();
console.log(allSensors);
}
generateSpiralPoints();
startFrameSpiral();
allSensors.push(new Sensor(sensorPosition1));
allSensors.push(new Sensor(sensorPosition2));
allSensors.push(new Sensor(sensorPosition3));
console.log(allSensors);
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