private void updateImage() {
fill(_vnull, _v);
for (int is = 0; is < _ns; ++is) {
float[] x1 = _x1[is];
float[] x2 = _x2[is];
float[] vx = _vx[is];
int np = _x1[is].length;
if (np == 1) {
_is2.set(x1[0], x2[0], vx[0]);
} else if (np > 1) {
for (int ip = 1; ip < np; ++ip) {
float x1a = x1[ip - 1];
float x2a = x2[ip - 1];
float vxa = vx[ip - 1];
float x1b = x1[ip];
float x2b = x2[ip];
float vxb = vx[ip];
ImageSampler2.Line line = _is2.sampleLine(x1a, x2a, x1b, x2b);
int nr = line.nr();
float ra = line.ra();
float rb = line.rb();
float dvx = (nr > 1) ? (vxb - vxa) / (float) (nr - 1) : vxa;
for (int ir = 0; ir < nr; ++ir) {
float vxi = vxa + (float) ir * dvx;
line.set(ir, vxi);
}
}
}
}
}
