public static double getInterpolatedValue(int[,] array, InterpolationChoice type, double x, double y)
{
int x1, y1;
x1 = (int)Math.Floor(x);
y1 = (int)Math.Floor(y);
double z11 = getClampedCoord(array, x1, y1);
double z12 = getClampedCoord(array, x1, y1 + 1);
double z21 = getClampedCoord(array, x1 + 1, y1);
double z22 = getClampedCoord(array, x1 + 1, y1 + 1);
double z00 = getClampedCoord(array, x1 - 1, y1 - 1);
double z01 = getClampedCoord(array, x1 - 1, y1);
double z02 = getClampedCoord(array, x1 - 1, y1 + 1);
double z03 = getClampedCoord(array, x1 - 1, y1 + 2);
double z10 = getClampedCoord(array, x1, y1 - 1);
double z13 = getClampedCoord(array, x1, y1 + 2);
double z20 = getClampedCoord(array, x1 + 1, y1 - 1);
double z23 = getClampedCoord(array, x1 + 1, y1 + 2);
double z30 = getClampedCoord(array, x1 + 2, y1 - 1);
double z31 = getClampedCoord(array, x1 + 2, y1);
double z32 = getClampedCoord(array, x1 + 2, y1 + 1);
double z33 = getClampedCoord(array, x1 + 2, y1 + 2);
double muy = x - x1;
double mux = y - y1;
//flat land sometimes gives trouble, so a slight increase can help that.
double roundingCorrection = 0.5;
switch (type)
{
case InterpolationChoice.linear:
return(Interpolate.BiLinearInterpolate(z11, z12, z21, z22, mux, muy) + roundingCorrection);
case InterpolationChoice.cosine:
return(Interpolate.BiCosineInterpolate(z11, z12, z21, z22, mux, muy) + roundingCorrection);
case InterpolationChoice.cubic:
return(Interpolate.BiCubicInterpolate(z00, z01, z02, z03, z10, z11, z12, z13, z20, z21, z22, z23, z30, z31, z32, z33, mux, muy) + roundingCorrection);
case InterpolationChoice.catmulRom:
return(Interpolate.BiCatmullRomInterpolate(z00, z01, z02, z03, z10, z11, z12, z13, z20, z21, z22, z23, z30, z31, z32, z33, mux, muy) + roundingCorrection);
case InterpolationChoice.hermite:
return(Interpolate.BiHermiteInterpolate(z00, z01, z02, z03, z10, z11, z12, z13, z20, z21, z22, z23, z30, z31, z32, z33, mux, muy, 0.75) + roundingCorrection);
case InterpolationChoice.fritschCarlson:
return(Interpolate.BiFritschCarlsonInterpolate(z00, z01, z02, z03, z10, z11, z12, z13, z20, z21, z22, z23, z30, z31, z32, z33, mux, muy) + roundingCorrection);
}
return(-1.0);
}
public static double getInterpolatedValue(int[,] array, InterpolationChoice type, double x, double y)
{
int x1, y1;
x1 = (int)Math.Floor(x);
y1 = (int)Math.Floor(y);
double z11 = getClampedCoord(array, x1, y1);
double z12 = getClampedCoord(array, x1, y1 + 1);
double z21 = getClampedCoord(array, x1 + 1, y1);
double z22 = getClampedCoord(array, x1 + 1, y1 + 1);
double z00 = getClampedCoord(array, x1 - 1, y1 - 1);
double z01 = getClampedCoord(array, x1 - 1, y1);
double z02 = getClampedCoord(array, x1 - 1, y1 + 1);
double z03 = getClampedCoord(array, x1 - 1, y1 + 2);
double z10 = getClampedCoord(array, x1, y1 - 1);
double z13 = getClampedCoord(array, x1, y1 + 2);
double z20 = getClampedCoord(array, x1 + 1, y1 - 1);
double z23 = getClampedCoord(array, x1 + 1, y1 + 2);
double z30 = getClampedCoord(array, x1 + 2, y1 - 1);
double z31 = getClampedCoord(array, x1 + 2, y1);
double z32 = getClampedCoord(array, x1 + 2, y1 + 1);
double z33 = getClampedCoord(array, x1 + 2, y1 + 2);
double muy = x - x1;
double mux = y - y1;
//flat land sometimes gives trouble, so a slight increase can help that.
double roundingCorrection = 0.5;
switch (type)
{
case InterpolationChoice.linear:
return Interpolate.BiLinearInterpolate(z11, z12, z21, z22, mux, muy) + roundingCorrection;
case InterpolationChoice.cosine:
return Interpolate.BiCosineInterpolate(z11, z12, z21, z22, mux, muy) + roundingCorrection;
case InterpolationChoice.cubic:
return Interpolate.BiCubicInterpolate(z00, z01, z02, z03, z10, z11, z12, z13, z20, z21, z22, z23, z30, z31, z32, z33, mux, muy) + roundingCorrection;
case InterpolationChoice.catmulRom:
return Interpolate.BiCatmullRomInterpolate(z00, z01, z02, z03, z10, z11, z12, z13, z20, z21, z22, z23, z30, z31, z32, z33, mux, muy) + roundingCorrection;
case InterpolationChoice.hermite:
return Interpolate.BiHermiteInterpolate(z00, z01, z02, z03, z10, z11, z12, z13, z20, z21, z22, z23, z30, z31, z32, z33, mux, muy, 0.75) + roundingCorrection;
case InterpolationChoice.fritschCarlson:
return Interpolate.BiFritschCarlsonInterpolate(z00, z01, z02, z03, z10, z11, z12, z13, z20, z21, z22, z23, z30, z31, z32, z33, mux, muy) + roundingCorrection;
}
return -1.0;
}