public static Vector3d operator -(Vector3d a, Vector3d b)
{
Vector3d derp = new Vector3d();
derp.X = a.X - a.X;
derp.Y = a.Y - a.Y;
derp.Z = a.Z - a.Z;
return derp;
}
public static Vector3d operator +(Vector3d a, Vector3d b)
{
Vector3d derp = new Vector3d();
derp.X = a.X + a.X;
derp.Y = a.Y + a.Y;
derp.Z = a.Z + a.Z;
return derp;
}
public static double Distance(Vector3d v1, Vector3d v2)
{
if (v1 == null || v2 == null) return double.MaxValue;
double x = v1.X - v2.X;
double y = v1.Y - v2.Y;
double z = v1.Z - v2.Z;
return Math.Sqrt(x * x + y * y + z * z);
}
public Vector3i(Vector3d f)
{
this.X = (long)f.X;
this.Y = (long)f.Y;
this.Z = (long)f.Z;
}
public abstract Vector3d Local2Global(int CX, int CZ, Vector3d local);
public abstract Vector3d Global2Local(Vector3d global, out int CX, out int CZ);
public override Vector3d Global2Local(Vector3d global, out int CX, out int CZ)
{
Vector3d r = global;
CX = (int)r.X / ChunkX;
CZ = (int)r.Z / ChunkZ;
r.X = r.X % ChunkX; //(px >> 4) & 0xf;
r.Z = r.Z % ChunkZ; //(py >> 4) & 0xf;
return r;
}
public override Vector3d Local2Global(int CX, int CZ, Vector3d local)
{
Vector3d r = local;
r.X += CX * ChunkX;
r.Z += CZ * ChunkZ;
return r;
}
/// <summary>
/// Calculates interpolated point between two points using Catmull-Rom Spline
/// </summary>
/// <remarks>
/// Points calculated exist on the spline between points two and three.
/// </remarks>
/// <param name="p0">First Point</param>
/// <param name="p1">Second Point</param>
/// <param name="p2">Third Point</param>
/// <param name="p3">Fourth Point</param>
/// <param name="t">
/// Normalised distance between second and third point
/// where the spline point will be calculated
/// </param>
/// <returns>
/// Calculated Spline Point
/// </returns>
public static Vector3d PointOnCurve(Vector3d p0, Vector3d p1, Vector3d p2, Vector3d p3, double t)
{
Vector3d ret = new Vector3d(0,0,0);
double t2 = t * t;
double t3 = t2 * t;
ret.X = 0.5d * ((2.0d * p1.X) +
(-p0.X + p2.X) * t +
(2.0d * p0.X - 5.0d * p1.X + 4 * p2.X - p3.X) * t2 +
(-p0.X + 3.0d * p1.X - 3.0d * p2.X + p3.X) * t3);
ret.Y = 0.5d * ((2.0d * p1.Y) +
(-p0.Y + p2.Y) * t +
(2.0d * p0.Y - 5.0d * p1.Y + 4 * p2.Y - p3.Y) * t2 +
(-p0.Y + 3.0d * p1.Y - 3.0d * p2.Y + p3.Y) * t3);
ret.Z = 0.5d * ((2.0d * p1.Z) +
(-p0.Z + p2.Z) * t +
(2.0d * p0.Z - 5.0d * p1.Z + 4 * p2.Z - p3.Z) * t2 +
(-p0.Z + 3.0d * p1.Z - 3.0d * p2.Z + p3.Z) * t3);
return ret;
}
