public void fitSpline(int evaluationPoints) {
if (xpf == null) {
xpf = toFloat(xp);
ypf = toFloat(yp);
subPixel = true;
}
if (xSpline == null || splinePoints != evaluationPoints) {
splinePoints = evaluationPoints;
xSpline = new float[splinePoints];
ySpline = new float[splinePoints];
}
int nNodes = nPoints;
if (type == POLYGON) {
nNodes++;
if (nNodes >= xpf.length) enlargeArrays();
xpf[nNodes - 1] = xpf[0];
ypf[nNodes - 1] = ypf[0];
}
float[] xindex = new float[nNodes];
for (int i = 0; i < nNodes; i++) xindex[i] = i;
SplineFitter sfx = new SplineFitter(xindex, xpf, nNodes);
SplineFitter sfy = new SplineFitter(xindex, ypf, nNodes);
// Evaluate the splines at all points
double scale = (double) (nNodes - 1) / (splinePoints - 1);
float xs = 0f, ys = 0f;
float xmin = Float.MAX_VALUE, xmax = -xmin, ymin = xmin, ymax = xmax;
for (int i = 0; i < splinePoints; i++) {
double xvalue = i * scale;
xs = (float) sfx.evalSpline(xindex, xpf, nNodes, xvalue);
if (xs < xmin) xmin = xs;
if (xs > xmax) xmax = xs;
xSpline[i] = xs;
ys = (float) sfy.evalSpline(xindex, ypf, nNodes, xvalue);
if (ys < ymin) ymin = ys;
if (ys > ymax) ymax = ys;
ySpline[i] = ys;
}
int ixmin = (int) Math.floor(xmin + 0.5f);
int ixmax = (int) Math.floor(xmax + 0.5f);
int iymin = (int) Math.floor(ymin + 0.5f);
int iymax = (int) Math.floor(ymax + 0.5f);
if (ixmin != 0) {
for (int i = 0; i < nPoints; i++) xpf[i] -= ixmin;
for (int i = 0; i < splinePoints; i++) xSpline[i] -= ixmin;
}
if (iymin != 0) {
for (int i = 0; i < nPoints; i++) ypf[i] -= iymin;
for (int i = 0; i < splinePoints; i++) ySpline[i] -= iymin;
}
x += ixmin;
y += iymin;
width = ixmax - ixmin;
height = iymax - iymin;
bounds = null;
cachedMask = null;
// update protected xp and yp arrays for backward compatibility
xp = toInt(xpf, xp, nPoints);
yp = toInt(ypf, yp, nPoints);
}
