var LOCATION_ORIGIN = {x:-80.5, y:-22.0, z:83.5};
var LOCATION_POLAR = { min_yaw: 60, max_yaw: 200, min_radius: 6.0, max_radius: 13.0 }


randFloat = function(low, high) {
    return low + Math.random() * (high - low);
}

clamp = function(x, lower, upper) {
    return Math.max(lower, Math.min(upper, x));
}

smoothstep = function(edge0, edge1, x) {
    var t = clamp( (x - edge0) / (edge1 - edge0), 0, 1);
    return t * t * (3.0 - 2.0 * t);
} 

function genLocation(seed) {
    var sign = (seed >= 0.5 ? 1.0 : -1.0);
    var absSeed = 2.0 * Math.abs((seed - 0.5));
    //var param = smoothstep(1.0, 0.0, absSeed);
    var param = (1.0 - absSeed) * (1.0 - absSeed);
    var yawCoord = 0.5 + sign * 0.5 * param
    var yaw = LOCATION_POLAR.min_yaw + yawCoord * (LOCATION_POLAR.max_yaw - LOCATION_POLAR.min_yaw);

    var radiusCoord = (1.0 - Math.abs(2 * yawCoord - 1.0) * Math.abs(2 * yawCoord - 1.0))
   // var radiusCoord = Math.cos(Math.abs(2 * yawCoord - 1.0))
    var radiusNoise = Math.random()
    //var radiusNoise = 1.0
    radiusCoord = radiusCoord * radiusNoise;

    var radius = LOCATION_POLAR.min_radius + (LOCATION_POLAR.max_radius - LOCATION_POLAR.min_radius) *  radiusCoord;

    var polar = { x: 0, y: yaw * Math.PI / 180, z: radius };
    var p = Vec3.fromPolar(polar);

    var pos = Vec3.sum(LOCATION_ORIGIN, p);
    print(JSON.stringify(pos))
    return pos;
}



var DEFAULT_LIFETIME = 10;
var TILE_UNIT = 0.2;
var TILE_DIM = { x: TILE_UNIT, y: TILE_UNIT, z: TILE_UNIT};

var crowd = []

function genEntity(index, position) {
    return (Entities.addEntity({
        type: "Shape",
        shape: "Cube",
        name: "Distri num " + index,
     //   color: getTileColor(a, b, c),
        position: position,    
      //  rotation: stageOrientation,    
        dimensions: TILE_DIM,
        canCastShadow: true,
        userData: JSON.stringify({ grabbableKey: { grabbable: false } }),
        lifetime: DEFAULT_LIFETIME,
    }));

}

function genCrowd(num) {
    for (i = 0; i < num; i++) {
        var seed = Math.random();
        //var seed = i / (num - 1);
        crowd.push(genEntity(i, genLocation(seed)));
    }
}

genCrowd(200)