IEnumerator DrawLine(WorldBubble startNode, WorldBubble destNode, Color c, string factor, float time = -1, int verts = 100, float delay = 1)
{
Vector3 start = startNode.transform.position, dest = destNode.transform.position;
time = time == -1 ? duration : time;
GameObject lrgo = GameObject.Instantiate(baseLine, Vector3.zero, Quaternion.identity, transform);
lrgo.SetActive(true);
LineRenderer lr = lrgo.GetComponent <LineRenderer>();
lr.material.color = c;
lr.positionCount = 2;
// float mag = (dest - start).magnitude / 2;
// float angle = Mathf.Atan2((dest - start).y, (dest - start).x);
Vector3 half = Vector3.Lerp(start, dest, .5f);
var dir = Vector2.Perpendicular(dest - start).normalized *dist;
var centre = half + new Vector3(dir.x, dir.y, 0);
var startAngle = Mathf.Atan2((centre - start).y, (centre - start).x) * Mathf.Rad2Deg;
var destAngle = Mathf.Atan2((centre - dest).y, (centre - dest).x) * Mathf.Rad2Deg;
// TODO: animation curve lerp
List <Vector3> points = new int[verts].Map((_, i) =>
Func.Lambda <float, Vector3>((float newAngle) => new Vector3(-Mathf.Cos(newAngle), -Mathf.Sin(newAngle), -1) * (centre - start).magnitude + centre)
(Mathf.LerpAngle(startAngle, destAngle, (float)i / verts) * Mathf.Deg2Rad)
).ToList();
lr.SetPositions(points.Take(2).ToArray());
float begin = Time.time;
bool inProgress = true;
while (inProgress)
{
yield return(null);
int curCount = lr.positionCount;
float step = Time.time - begin;
lr.positionCount = System.Math.Min((int)(step / time * verts), verts);
for (int i = curCount; i < lr.positionCount; i++)
{
lr.SetPosition(i, points[i]);
}
if (step > time)
{
inProgress = false;
}
}
if (factor != "")
{
StartCoroutine(ShowLogo(destNode.icons[World.GetFactor(factor)?.verbose], delay));
}
yield return(new WaitForSeconds(delay));
// lr.Simplify(1E-8);
StartCoroutine(EraseLine(lr, points, .25f));
}
void Start()
{
// World.lineToDraw = new List < (World.Region, World.Region, string) > () { (World.Region.City, World.Region.Forest, "co2"), (World.Region.City, World.Region.Arctic, "co2"), (World.Region.City, World.Region.Fire, "co2") };
foreach (var(from, to, tag) in World.lineToDraw)
{
WorldBubble dest = Fetch($"{to.ToString()}Node").GetValue(this) as WorldBubble;
StartCoroutine(DrawLine(Fetch($"{from.ToString()}Node").GetValue(this) as WorldBubble, dest, dest.colour, tag));
}
World.lineToDraw = new List <(World.Region, World.Region, string)> ();
}