/// <inheritdoc />
public override void OnMouseMove(Float2 location)
{
if (_isMoving && Float2.DistanceSquared(ref location, ref _startMovePos) > 25.0f)
{
_startMovePos = Float2.Minimum;
var x = PointToParent(location).X;
var frame = (int)((x - Width * 0.5f) / Gradient._scale);
Gradient.SetStopFrame(Index, frame);
}
base.OnMouseMove(location);
}
/// <summary>
/// Checks if a point intersects a bezier curve
/// </summary>
/// <param name="start">The start location.</param>
/// <param name="end">The end location.</param>
/// <param name="point">The point</param>
/// <param name="distance">Distance at which its an intersection</param>
public static bool IntersectsConnection(ref Float2 start, ref Float2 end, ref Float2 point, float distance)
{
// Pretty much a point in rectangle check
if ((point.X - start.X) * (end.X - point.X) < 0)
{
return(false);
}
float offset = Mathf.Sign(end.Y - start.Y) * distance;
if ((point.Y - (start.Y - offset)) * ((end.Y + offset) - point.Y) < 0)
{
return(false);
}
// Taken from the Render2D.DrawBezier code
float squaredDistance = distance;
var dst = (end - start) * new Float2(0.5f, 0.05f);
var control1 = new Float2(start.X + dst.X, start.Y + dst.Y);
var control2 = new Float2(end.X - dst.X, end.Y + dst.Y);
var d1 = control1 - start;
var d2 = control2 - control1;
var d3 = end - control2;
float len = d1.Length + d2.Length + d3.Length;
int segmentCount = Math.Min(Math.Max(Mathf.CeilToInt(len * 0.05f), 1), 100);
float segmentCountInv = 1.0f / segmentCount;
Bezier(ref start, ref control1, ref control2, ref end, 0, out var p);
for (int i = 1; i <= segmentCount; i++)
{
var oldp = p;
float t = i * segmentCountInv;
Bezier(ref start, ref control1, ref control2, ref end, t, out p);
// Maybe it would be reasonable to return the point?
CollisionsHelper.ClosestPointPointLine(ref point, ref oldp, ref p, out var result);
if (Float2.DistanceSquared(point, result) <= squaredDistance)
{
return(true);
}
}
return(false);
}
