/// <summary>
/// Linearly interpolates between two <see cref="WorldCoordinate"/>s.
/// </summary>
/// <param name="a">The interpolation start point.</param>
/// <param name="b">The interpolation end point.</param>
/// <param name="t">A 0-1 fraction, indicating which value between the two points to return.</param>
/// <returns>A <see cref="WorldCoordinate"/> value between the start and end point.</returns>
public static WorldCoordinate Lerp(WorldCoordinate a, WorldCoordinate b, float t)
{
WorldCoordinate diff = b - a;
float secAdd = diff.Sector * t;
float subAdd = diff.Subposition * t;
float secRem = secAdd % 1;
int sec = a.Sector + HMath.FloorToInt(secAdd);
float sub = a.Subposition + subAdd + secRem;
return(new WorldCoordinate(sec, sub, false));
}
/// <summary>
/// Constructs a new WorldCoordinate at the given position.
/// <para>If clampSubposition is false, subposition values not within 0-1 will be added to the
/// new <see cref="WorldCoordinate"/>'s sector position.</para>
/// For instance, setting the sector to 1 and subposition 1.5 would place the new <see cref="WorldCoordinate"/>
/// at sector 2, subposition 0.5.
/// </summary>
/// <param name="sector">The new <see cref="WorldCoordinate"/>'s sector position.</param>
/// <param name="subposition">The new <see cref="WorldCoordinate"/>'s subposition within its sector.</param>
/// <param name="clampSubposition">Whether to clamp subposition between 0 and 1, or add excess
/// position to the sector value.</param>
public WorldCoordinate(int sector, float subposition, bool clampSubposition = true)
{
if (clampSubposition)
{
Sector = sector;
Subposition = HMath.Clamp(subposition, 0, 1 - float.Epsilon);
}
else
{
int diff = HMath.FloorToInt(subposition);
Sector = sector + diff;
Subposition = subposition - diff;
}
}
/// <summary>
/// Construct a new <see cref="WorldPoint"/> at the given sector and subposition.
/// </summary>
/// <param name="sector">The new <see cref="WorldPoint"/>'s sector coordinates.</param>
/// <param name="subposition">The new <see cref="WorldPoint"/>'s subposition coordinates.</param>
public WorldPoint(Vector2 sector, Vector2 subposition)
{
X = new WorldCoordinate(HMath.FloorToInt(sector.X), subposition.X);
Y = new WorldCoordinate(HMath.FloorToInt(sector.Y), subposition.Y);
}