public void Reset()
{
Vector v0 = p01 - p00;
Vector v1 = p10 - p00;
for (int i = 0; i <= steps; i++)
{
double u = parameterBounds.RangeU.Span * i / steps;
// parameters.Add(new List<PointUV>());
// tabAngles.Add(new List<double>());
// points.Add(new List<Point>());
for (int j = 0; j <= steps; j++)
{
parameters[i, j] = PointUV.Create(u, parameterBounds.RangeV.Span * j / steps);
points[i, j] = Interpolation.Bilinear(parameterBounds, boundaryValues, parameters[i, j]);
// tabAngles[i].Add((double) Math.PI);
}
}
}
private double3 Bilinear(double2 t, int iLod)
{
double txW = t.x * Map.LodWidth(iLod);
double tyH = t.y * Map.LodHeight(iLod);
int x1 = txW.PreciseRound();
int y1 = tyH.PreciseRound();
int x0 = x1 - 1;
int y0 = y1 - 1;
double kx = txW - x0 - 0.5;
double ky = tyH - y0 - 0.5;
if (WrapMode <= TextureWrap.ClampToEdge ||
WrapMode == TextureWrap.MirroredRepeat)
{
if (x0 == -1)
{
x0 = 0;
}
else if (x1 == Map.LodWidth(iLod))
{
x1 = Map.LodWidth(iLod) - 1;
}
if (y0 == -1)
{
y0 = 0;
}
else if (y1 == Map.LodHeight(iLod))
{
y1 = Map.LodHeight(iLod) - 1;
}
// FIXIT: there is no need to lerp in edge-cases
}
else if (WrapMode == TextureWrap.ClampToBorder)
{
double3 c00, c10, c01, c11;
if (x0 == -1)
{
if (y0 == -1) // Top left corner
{
c00 = c01 = c10 = BorderColor;
c11 = Map.Map(x1, y1, iLod);
}
else if (y1 == Map.LodHeight(iLod)) // Bottom left corner
{
c00 = c01 = c11 = BorderColor;
c10 = Map.Map(x1, y0, iLod);
}
else // Left side
{
c00 = c01 = BorderColor;
c10 = Map.Map(x1, y0, iLod);
c11 = Map.Map(x1, y1, iLod);
}
}
else if (x1 == Map.LodWidth(iLod))
{
if (y0 == -1) // Top right corner
{
c00 = c10 = c11 = BorderColor;
c01 = Map.Map(x0, y1, iLod);
}
else if (y1 == Map.LodHeight(iLod)) // Bottom right corner
{
c10 = c11 = c01 = BorderColor;
c00 = Map.Map(x0, y0, iLod);
}
else // Right side
{
c10 = c11 = BorderColor;
c00 = Map.Map(x0, y0, iLod);
c01 = Map.Map(x0, y1, iLod);
}
}
else
{
if (y0 == -1) // Top side
{
c00 = c10 = BorderColor;
c01 = Map.Map(x0, y1, iLod);
c11 = Map.Map(x1, y1, iLod);
}
else if (y1 == Map.LodHeight(iLod)) // Bottom side
{
c01 = c11 = BorderColor;
c00 = Map.Map(x0, y0, iLod);
c10 = Map.Map(x1, y0, iLod);
}
else
{
c00 = Map.Map(x0, y0, iLod);
c10 = Map.Map(x1, y0, iLod);
c01 = Map.Map(x0, y1, iLod);
c11 = Map.Map(x1, y1, iLod);
}
}
return(Interpolation.Bilinear(kx, ky,
c00, c10,
c01, c11
));
}
else if (WrapMode == TextureWrap.Repeat)
{
if (x0 == -1)
{
x0 = Map.LodWidth(iLod) - 1;
}
else if (x1 == Map.LodWidth(iLod))
{
x1 = 0;
}
if (y0 == -1)
{
y0 = Map.LodHeight(iLod) - 1;
}
else if (y1 == Map.LodHeight(iLod))
{
y1 = 0;
}
}
double3 c = Interpolation.Bilinear(kx, ky,
Map.Map(x0, y0, iLod), Map.Map(x1, y0, iLod),
Map.Map(x0, y1, iLod), Map.Map(x1, y1, iLod)
);
return(c);
}