public HitObject FindEdges(CircleCollider2D collider)
{
// position of light source
var o = transform.position;
// position of circle
var c = collider.transform.position;
var oc = c - o;
var ocn = oc.normalized;
// radius of circle
var r = collider.radius * collider.transform.localScale.x;
var d = oc.magnitude;
// sin(t) = O/H = r/d
// t = sin-1(r/d)
// theta
var trad = Mathf.Asin(r / d);
var tdeg = trad * Mathf.Rad2Deg;
// distance from light source to hit edge
// x = dcos(t)
var x = d * Mathf.Cos(trad);
// 0 left
// 1 right
var hits = new HitVertex[2];
var rots = new[] { Quaternion.Euler(0, 0, tdeg), Quaternion.Euler(0, 0, -tdeg) };
for (int i = 0; i < 2; i++)
{
var toHit = rots[i] * ocn * x;
hits[i].worldPosition = o + toHit;
hits[i].angleFromCentre = Vector2.SignedAngle(ocn, toHit.normalized);
}
return(new HitObject()
{
left = hits[0],
right = hits[1]
});
}
private void model1_MouseDown(object sender, MouseEventArgs e)
{
// gets the entity index
entityIndex = model1.GetEntityUnderMouseCursor(e.Location);
if (e.Button == MouseButtons.Right)
{
foreach (var item in model1.Entities)
{
item.Visible = true;
}
var foot = FindFoot();
if (structType == StructureTypes.Arrows)
{
DrawArrows(foot);
}
else if (structType == StructureTypes.Tetra)
{
DrawTetra(foot);
}
isBoneSelected = false;
model1.Entities.Regen();
model1.Invalidate();
return;
}
else if (isBoneSelected)
{
if (entityIndex < 0 || model1.Entities[entityIndex] is Mesh)
{
entityIndex = -1;
return;
}
}
else if (!isBoneSelected)
{
if (entityIndex < 0 || model1.Entities[entityIndex] is PointCloud || model1.Entities[entityIndex].LayerName.EndsWith("Structure") || e.Button == MouseButtons.Middle)
{
entityIndex = -1;
return;
}
}
isBoneSelected = true;
model1.ActionMode = actionType.None;
var ent = model1.Entities[entityIndex];
if (ent is Mesh)
{
foreach (var item in model1.Entities)
{
if (item.EntityData == null)
{
item.Visible = false;
}
else if (item.EntityData.ToString() != ent.EntityData.ToString() || !(item.LayerName == ent.LayerName || item.LayerName == ent.LayerName + structType + "Points"))
{
item.Visible = false;
}
else
{
if (item is Mesh)
{
selectedBone = (Mesh)item;
}
}
}
}
selectedPoint = model1.FindClosestVertex(model1.Entities[entityIndex], e.Location, 30);
}
