/** create parallel coordinates display for data */
public static void parallel(DisplayImpl display, FlatField data)
throws VisADException, RemoteException {
FunctionType ftype = (FunctionType) data.getType();
RealType index = (RealType) ftype.getDomain().getComponent(0);
RealTupleType range = (RealTupleType) ftype.getRange();
int ncoords = range.getDimension();
int nrows = data.getLength();
Set index_set = data.getDomainSet();
float[][] samples = data.getFloats(false);
RealType x = RealType.getRealType("coordinate");
RealType y = RealType.getRealType("value");
SetType xy = new SetType(new RealTupleType(x, y));
FunctionType ptype = new FunctionType(index, xy);
FieldImpl pfield = new FieldImpl(ptype, index_set);
for (int j = 0; j < nrows; j++) {
float[][] locs = new float[2][ncoords];
for (int i = 0; i < ncoords; i++) {
locs[0][i] = i;
locs[1][i] = samples[i][j];
}
Gridded2DSet set = new Gridded2DSet(xy, locs, ncoords);
pfield.setSample(j, set, false);
}
// create a DataReference for river system
DataReference parallel_ref = new DataReferenceImpl("parallel");
parallel_ref.setData(pfield);
display.addMap(new ScalarMap(x, Display.XAxis));
display.addMap(new ScalarMap(y, Display.YAxis));
// enable axis scales
display.getGraphicsModeControl().setScaleEnable(true);
// link display to parallel display
display.addReference(parallel_ref);
}
/**
* Create a front from the curve
*
* @param curve the curve coordinates
* @param flip true to flip the pips
* @return The front as a FieldImpl
* @throws RemoteException On badness
* @throws VisADException On badness
*/
private FieldImpl curveToFront(float[][] curve, boolean flip)
throws VisADException, RemoteException {
if (flipTheFlip) {
flip = !flip;
}
// compute various scaling factors
int len = curve[0].length;
if (len < 2) {
return null;
}
float[] seg_length = new float[len - 1];
float curve_length = curveLength(curve, seg_length);
float delta = curve_length / (len - 1);
// curve[findex] where
// float findex = ibase + mul * repeat_shapes[shape][0][j]
float mul = rprofile_length * zoom / rsegment_length;
// curve_perp[][findex] * ratio * repeat_shapes[shape][1][j]
float ratio = delta * mul;
// compute unit perpendiculars to curve
float[][] curve_perp = new float[2][len];
for (int i = 0; i < len; i++) {
int im = i - 1;
int ip = i + 1;
if (im < 0) {
im = 0;
}
if (ip > len - 1) {
ip = len - 1;
}
float yp = curve[0][ip] - curve[0][im];
float xp = curve[1][ip] - curve[1][im];
xp = -xp;
float d = (float) Math.sqrt(xp * xp + yp * yp);
if (flip) {
d = -d;
}
xp = xp / d;
yp = yp / d;
curve_perp[0][i] = xp;
curve_perp[1][i] = yp;
}
// build Vector of FlatFields for each shape of each segment
Vector inner_field_vector = new Vector();
for (int segment = 0; true; segment++) {
// curve[findex] where
// float findex = ibase + mul * repeat_shapes[shape][0][j]
float segment_length = (segment == 0) ? fsegment_length : rsegment_length;
int profile_length = (segment == 0) ? fprofile_length : rprofile_length;
mul = profile_length * zoom / segment_length;
// curve_perp[][findex] * ratio * repeat_shapes[shape][1][j]
// float ratio = delta * mul;
// figure out if clipping is needed for this segment
// only happens for last segment
boolean clip = false;
float xclip = 0.0f;
// int ibase = segment * profile_length;
int ibase = (segment == 0) ? 0 : fprofile_length + (segment - 1) * rprofile_length;
int iend = ibase + profile_length;
if (ibase > len - 1) {
break;
}
if (iend > len - 1) {
clip = true;
iend = len - 1;
xclip = (iend - ibase) / mul;
}
// set up shapes for first or repeating segment
int nshapes = nrshapes;
float[][][] shapes = repeat_shapes;
int[][][] tris = repeat_tris;
float[] red = repeat_red;
float[] green = repeat_green;
float[] blue = repeat_blue;
if (segment == 0) {
nshapes = nfshapes;
shapes = first_shapes;
tris = first_tris;
red = first_red;
green = first_green;
blue = first_blue;
}
// iterate over shapes for segment
for (int shape = 0; shape < nshapes; shape++) {
float[][] samples = shapes[shape];
int[][] ts = tris[shape];
/*
// if needed, clip shape
if (clip) {
float[][][] outs = new float[1][][];
int[][][] outt = new int[1][][];
DelaunayCustom.clip(samples, ts, 1.0f, 0.0f, xclip, outs, outt);
samples = outs[0];
ts = outt[0];
}
*/
if ((samples == null) || (samples[0].length < 1)) {
break;
}
float[][] ss = mapShape(samples, len, ibase, mul, ratio, curve, curve_perp);
// **** get rid of previous calls to fill() ****
ts = DelaunayCustom.fill(ss);
// jeffmc: For now don't clip. This seems to fix the problem of too short a front
boolean DOCLIP = false;
if (clip && DOCLIP) {
float[][] clip_samples = {
{xclip, xclip, xclip - CLIP_DELTA},
{CLIP_DELTA, -CLIP_DELTA, 0.0f}
};
float[][] clip_ss = mapShape(clip_samples, len, ibase, mul, ratio, curve, curve_perp);
// now solve for:
// xc * clip_samples[0][0] + yc * clip_samples[1][0] = 1
// xc * clip_samples[0][1] + yc * clip_samples[1][1] = 1
// xc * clip_samples[0][2] + yc * clip_samples[1][2] < 1
float det =
(clip_samples[0][1] * clip_samples[1][0] - clip_samples[0][0] * clip_samples[1][1]);
float xc = (clip_samples[1][0] - clip_samples[1][1]) / det;
float yc = (clip_samples[0][1] - clip_samples[0][0]) / det;
float v = 1.0f;
if (xc * clip_samples[0][2] + yc * clip_samples[1][2] > v) {
xc = -xc;
yc = -yc;
v = -v;
}
float[][][] outs = new float[1][][];
int[][][] outt = new int[1][][];
DelaunayCustom.clip(ss, ts, xc, yc, v, outs, outt);
ss = outs[0];
ts = outt[0];
}
if (ss == null) {
break;
}
int n = ss[0].length;
// create color values for field
float[][] values = new float[3][n];
float r = red[shape];
float g = green[shape];
float b = blue[shape];
for (int i = 0; i < n; i++) {
values[0][i] = r;
values[1][i] = g;
values[2][i] = b;
}
// construct set and field
DelaunayCustom delaunay = new DelaunayCustom(ss, ts);
Irregular2DSet set = new Irregular2DSet(curve_type, ss, null, null, null, delaunay);
FlatField field = new FlatField(front_inner, set);
field.setSamples(values, false);
inner_field_vector.addElement(field);
// some crazy bug - see Gridded3DSet.makeNormals()
} // end for (int shape=0; shape<nshapes; shape++)
} // end for (int segment=0; true; segment++)
int nfields = inner_field_vector.size();
Integer1DSet iset = new Integer1DSet(front_index, nfields);
FieldImpl front = new FieldImpl(front_type, iset);
FlatField[] fields = new FlatField[nfields];
for (int i = 0; i < nfields; i++) {
fields[i] = (FlatField) inner_field_vector.elementAt(i);
}
front.setSamples(fields, false);
return front;
}