public static void GenerateSdf_legacy(FloatBmp output,
Shape shape,
double range,
Vector2 scale,
Vector2 translate)
{
int w = output.Width;
int h = output.Height;
for (int y = 0; y < h; ++y)
{
int row = shape.InverseYAxis ? h - y - 1 : y;
for (int x = 0; x < w; ++x)
{
double dummy = 0;
Vector2 p = (new Vector2(x + 0.5f, y + 0.5) * scale) - translate;
SignedDistance minDistance = SignedDistance.INFINITE;
//TODO: review here
List <Contour> contours = shape.contours;
int m = contours.Count;
for (int n = 0; n < m; ++n)
{
Contour contour = contours[n];
List <EdgeHolder> edges = contour.edges;
int nn = edges.Count;
for (int i = 0; i < nn; ++i)
{
EdgeHolder edge = edges[i];
SignedDistance distance = edge.edgeSegment.signedDistance(p, out dummy);
if (distance < minDistance)
{
minDistance = distance;
}
}
}
output.SetPixel(x, row, (float)(minDistance.distance / (range + 0.5f)));
}
}
}
//siged distance field generator
public static void GenerateSdf(FloatBmp output,
Shape shape,
double range,
Vector2 scale,
Vector2 translate)
{
List <Contour> contours = shape.contours;
int contourCount = contours.Count;
int w = output.Width, h = output.Height;
List <int> windings = new List <int>(contourCount);
for (int i = 0; i < contourCount; ++i)
{
windings.Add(contours[i].winding());
}
//# ifdef MSDFGEN_USE_OPENMP
//#pragma omp parallel
//#endif
{
//# ifdef MSDFGEN_USE_OPENMP
//#pragma omp for
//#endif
double[] contourSD = new double[contourCount];
for (int y = 0; y < h; ++y)
{
int row = shape.InverseYAxis ? h - y - 1 : y;
for (int x = 0; x < w; ++x)
{
double dummy = 0;
Vector2 p = (new Vector2(x + .5, y + .5) / scale) - translate;
double negDist = -SignedDistance.INFINITE.distance;
double posDist = SignedDistance.INFINITE.distance;
int winding = 0;
for (int i = 0; i < contourCount; ++i)
{
Contour contour = contours[i];
SignedDistance minDistance = SignedDistance.INFINITE;
List <EdgeHolder> edges = contour.edges;
int edgeCount = edges.Count;
for (int ee = 0; ee < edgeCount; ++ee)
{
EdgeHolder edge = edges[ee];
SignedDistance distance = edge.edgeSegment.signedDistance(p, out dummy);
if (distance < minDistance)
{
minDistance = distance;
}
}
contourSD[i] = minDistance.distance;
if (windings[i] > 0 && minDistance.distance >= 0 && Math.Abs(minDistance.distance) < Math.Abs(posDist))
{
posDist = minDistance.distance;
}
if (windings[i] < 0 && minDistance.distance <= 0 && Math.Abs(minDistance.distance) < Math.Abs(negDist))
{
negDist = minDistance.distance;
}
}
double sd = SignedDistance.INFINITE.distance;
if (posDist >= 0 && Math.Abs(posDist) <= Math.Abs(negDist))
{
sd = posDist;
winding = 1;
for (int i = 0; i < contourCount; ++i)
{
if (windings[i] > 0 && contourSD[i] > sd && Math.Abs(contourSD[i]) < Math.Abs(negDist))
{
sd = contourSD[i];
}
}
}
else if (negDist <= 0 && Math.Abs(negDist) <= Math.Abs(posDist))
{
sd = negDist;
winding = -1;
for (int i = 0; i < contourCount; ++i)
{
if (windings[i] < 0 && contourSD[i] < sd && Math.Abs(contourSD[i]) < Math.Abs(posDist))
{
sd = contourSD[i];
}
}
}
for (int i = 0; i < contourCount; ++i)
{
if (windings[i] != winding && Math.Abs(contourSD[i]) < Math.Abs(sd))
{
sd = contourSD[i];
}
}
output.SetPixel(x, row, (float)(sd / range + .5));
}
}
}
}
