public override Vector2Int[] GetGrid()
{
List <Vector2Int> results = new List <Vector2Int>();
Vector2 min = new Vector2(Math.Min(P0.X, P1.X), Math.Min(P0.Y, P1.Y));
Vector2 max = new Vector2(Math.Max(P0.X, P1.X), Math.Max(P0.Y, P1.Y));
for (int x = (int)Math.Floor(min.X); x <= (int)Math.Floor(max.X); x++)
{
for (int y = (int)Math.Floor(min.Y); y <= (int)Math.Floor(max.Y); y++)
{
if (Math2DHelper.LineIntersectsRect(P0, P1, new Vector2(x, y), new Vector2(x + 1, y + 1)))
{
results.Add(new Vector2Int(x, y));
}
}
}
return(results.ToArray());
}
public override Vector2 GetNotOverlapVector(Vector2 center, float radius)
{
Vector2 intersection0, intersection1;
int count = Math2DHelper.FindLineCircleIntersections(center.X, center.Y, radius, P0, P1, out intersection0, out intersection1);
if (count == 0)
{
return(Vector2.Zero);
}
else if (count == 1)
{
if ((intersection0 - P0).LengthSquared() <= (P1 - intersection0).LengthSquared())
{
Vector2 line = P0 - P1;
Vector2 cross = new Vector2(line.Y, -line.X);
Vector2 up = Vector2.Normalize(line) * (intersection0 - P0).Length();
Vector2 right = Vector2.Normalize(cross) * Vector2.Dot(intersection0 - center, Vector2.Normalize(cross));
Vector2 right1 = -Vector2.Normalize(right) * (radius - right.Length());
if (up.LengthSquared() <= right1.LengthSquared())
{
return(up);
}
else
{
return(right1);
}
}
else
{
Vector2 line = P1 - P0;
Vector2 cross = new Vector2(line.Y, -line.X);
Vector2 up = Vector2.Normalize(line) * (intersection0 - P1).Length();
Vector2 right = Vector2.Normalize(cross) * Vector2.Dot(intersection0 - center, Vector2.Normalize(cross));
Vector2 right1 = -Vector2.Normalize(right) * (radius - right.Length());
if (up.LengthSquared() <= right1.LengthSquared())
{
return(up);
}
else
{
return(right1);
}
}
}
else
{
Vector2 middle = (intersection0 + intersection1) * 0.5f;
if (center == middle)
{
Vector2 line = P0 - P1;
Vector2 cross = new Vector2(line.Y, -line.X);
return(Vector2.Normalize(cross) * radius);
}
else
{
return(Vector2.Normalize((center - middle)) * (radius - (center - middle).Length()));
}
}
}
public override bool IntersectsLine(Vector2 p0, Vector2 p1)
{
return(Math2DHelper.PolyIntersectsLine(Points, p0, p1));
}
public override bool IntersectsLine(Vector2 p0, Vector2 p1)
{
return(Math2DHelper.LineIntersectsLine(P0, P1, p0, p1));
}
public override bool IntersectsLine(Vector2 p0, Vector2 p1)
{
Vector2 intersection0, intersection1;
return(Math2DHelper.FindLineCircleIntersections(Center.X, Center.Y, Radius, p0, p1, out intersection0, out intersection1) >= 1);
}