private void loadA2D(File f) {
Reader in = null;
String q = "", name, value;
boolean keepOn = true, hasInfo, endOfLine, isHeader;
int xIndex = 0, yIndex = 0, chIndex;
char c;
data = new double[0][0];
try {
in = new FileReader(f);
while (keepOn) {
chIndex = in.read();
c = (char) chIndex;
hasInfo = q.length() > 0;
endOfLine = (c == '\n');
isHeader = hasInfo && (q.charAt(0) == '#');
if (hasInfo && endOfLine && isHeader) {
name = q.substring(q.indexOf('#') + 1, q.indexOf(':'));
value = q.substring(q.indexOf(':') + 1).trim();
if (name.equals("Size")) {
res = Int2.parseInfoString(value);
data = new double[res.x][res.y];
} else if (name.equals("Origin")) this.origin = Pos2d.parseInfoString(value);
else if (name.equals("Step")) this.step = Vec2d.parseInfoString(value);
else if (name.equals("SeamlessX")) this.seamlessX = Boolean.parseBoolean(value);
else if (name.equals("SeamlessY")) this.seamlessY = Boolean.parseBoolean(value);
q = "";
} else if (hasInfo && (isHeader == false) && (Character.isWhitespace(c) || chIndex == -1)) {
data[xIndex][yIndex++] = Double.parseDouble(q);
q = "";
if (endOfLine) {
xIndex++;
yIndex = 0;
}
} else {
q += c;
}
keepOn = (chIndex != -1);
}
} catch (Exception exc) {
System.err.println("Fehler beim Lesen der Datei \"" + f.getPath() + "\": " + exc);
} finally {
try {
in.close();
} catch (Exception exc) {
}
}
}
/**
* Returns a denominator for filtering the wide-field, OTF band 0 with no attenuation.
*
* @param wParam Wiener filter parameter
*/
public Vec2d.Real getWidefieldDenominator(double wParam) {
Vec2d.Real ret = Vec2d.createReal(sp, 2);
addWienerDenominator(ret, 0, 0, false);
final int w = ret.vectorWidth(), h = ret.vectorHeight();
for (int y = 0; y < h; y++)
for (int x = 0; x < w; x++) ret.set(x, y, 1 / (ret.get(x, y) + (float) (wParam * wParam)));
return ret;
}
/**
* Returns a copy of a per-band, per-direction Wiener denominator. This is used mostly for
* filtering intermediate results.
*
* @param d Direction
* @param b Band
* @param wParam Wiener filter parameter
*/
public Vec2d.Real getIntermediateDenominator(int d, int b, double wParam) {
// get the otf
Vec2d.Real ret = Vec2d.createReal(sp, 2);
addWienerDenominator(ret, d, b, sp.otf().isAttenuate());
// add the wiener parameter
final int w = ret.vectorWidth(), h = ret.vectorHeight();
for (int y = 0; y < h; y++)
for (int x = 0; x < w; x++) ret.set(x, y, 1 / (ret.get(x, y) + (float) (wParam * wParam)));
return ret;
}
/**
* Setup the Wiener filter. This (re)initiates the cached filter values. Has to be called if the
* OTF or the shift parameters change.
*/
public void updateCache() {
Tool.Timer t1 = Tool.getTimer();
final int w = sp.vectorWidth(), h = sp.vectorHeight();
t1.start();
wDenom = Vec2d.createReal(2 * w, 2 * h);
boolean useAtt = sp.otf().isAttenuate();
// loop directions, bands
for (int d = 0; d < sp.nrDir(); d++) {
for (int b = 0; b < sp.dir(d).nrBand(); b++) {
addWienerDenominator(wDenom, d, b, useAtt);
}
}
t1.stop();
Tool.trace("Wiener filter setup complete, took " + t1);
}
public static Point closestPoint(Vec2d seg_a, Vec2d seg_b, Point circleOrigin) {
Vec2d seg_v = seg_b.sub(seg_a);
Vec2d pt_v = new Vec2d(circleOrigin.getX(), circleOrigin.getY()).sub(seg_a);
Vec2d seg_v_unit = seg_v.div(seg_v.Length());
double proj = pt_v.Dot(seg_v_unit);
Point closest;
if (proj <= 0) {
closest = new Point(seg_a.x, seg_b.x);
} else if (proj >= seg_v.Length()) {
closest = new Point(seg_b.x, seg_b.x);
} else {
Vec2d proj_v = seg_v_unit.mul(proj);
Vec2d newVec = proj_v.add(seg_a);
closest = new Point(newVec.x, newVec.y);
}
return closest;
}
