private void InsertNewPoint()
{
if (selectedIndex < 0 || selectedIndex >= spline.Count)
{
return;
}
if (spline.Count == 0)
{
AddNewPoint();
}
else
{
Vector2 pos = Vector2.zero;
if (selectedIndex == 0)
{
// Insert at start
// If nothing to project, just down & left
if (spline.Count == 1)
{
pos = spline.GetPoint(0) - Vector2.up * 2.0f - Vector2.right * 2.0f;
}
else
{
// Extended from previous & varied a little
// rotate left/right alternately for interest
Vector2 tangent = spline.Derivative(0);
pos = spline.GetPoint(0) - tangent * 2f;
}
}
else
{
// split half way between previous and selected
pos = spline.Interpolate(selectedIndex - 1, 0.5f);
}
spline.InsertPoint(selectedIndex, pos);
}
}
