static void
gwy_data_field_facet_distribution(GwyDataField *dfield,
gint kernel_size,
GwyContainer *container)
{
GwyDataField *dtheta, *dphi, *dist;
GwySIUnit *siunit;
gdouble *xd, *yd, *data;
const gdouble *xdc, *ydc;
gdouble q, max;
gint res, hres, i, j, mi, mj, xres, yres;
if (gwy_container_gis_object_by_name(container, "/theta", &dtheta))
g_object_ref(dtheta);
else
dtheta = gwy_data_field_new_alike(dfield, FALSE);
if (gwy_container_gis_object_by_name(container, "/phi", &dphi))
g_object_ref(dphi);
else
dphi = gwy_data_field_new_alike(dfield, FALSE);
compute_slopes(dfield, kernel_size, dtheta, dphi);
xres = gwy_data_field_get_xres(dfield);
yres = gwy_data_field_get_yres(dfield);
xd = gwy_data_field_get_data(dtheta);
yd = gwy_data_field_get_data(dphi);
for (i = xres*yres; i; i--, xd++, yd++) {
gdouble theta, phi;
slopes_to_angles(*xd, *yd, &theta, &phi);
*xd = theta;
*yd = phi;
}
q = gwy_data_field_get_max(dtheta);
q = MIN(q*1.05, G_PI/2.0);
q = G_SQRT2/(2.0*sin(q/2.0));
if (gwy_container_gis_object_by_name(container, "/0/data", &dist)) {
g_object_ref(dist);
gwy_data_field_clear(dist);
gwy_data_field_set_xreal(dist, 2.0*G_SQRT2/q);
gwy_data_field_set_yreal(dist, 2.0*G_SQRT2/q);
}
else {
dist = gwy_data_field_new(FDATA_RES, FDATA_RES,
2.0*G_SQRT2/q, 2.0*G_SQRT2/q,
TRUE);
siunit = gwy_si_unit_new("");
gwy_data_field_set_si_unit_z(dist, siunit);
g_object_unref(siunit);
/* FIXME */
siunit = gwy_si_unit_new("");
gwy_data_field_set_si_unit_xy(dist, siunit);
g_object_unref(siunit);
}
res = FDATA_RES;
hres = (res - 1)/2;
data = gwy_data_field_get_data(dist);
xdc = gwy_data_field_get_data_const(dtheta);
ydc = gwy_data_field_get_data_const(dphi);
for (i = xres*yres; i; i--, xdc++, ydc++) {
gdouble x, y;
gint xx, yy;
angles_to_xy(*xdc, *ydc, &x, &y);
xx = GWY_ROUND(q*x/G_SQRT2*hres) + hres;
yy = GWY_ROUND(q*y/G_SQRT2*hres) + hres;
data[yy*res + xx] += 1.0;
}
/* Find maxima */
mi = mj = hres;
max = 0;
for (i = 1; i+1 < res; i++) {
for (j = 1; j+1 < res; j++) {
gdouble z;
z = data[i*res + j]
+ 0.3*(data[i*res + j - 1]
+ data[i*res + j + 1]
+ data[i*res - res + j]
+ data[i*res + res + j])
+ 0.1*(data[i*res - res + j - 1]
+ data[i*res - res + j + 1]
+ data[i*res + res + j - 1]
+ data[i*res + res + j + 1]);
if (G_UNLIKELY(z > max)) {
max = z;
mi = i;
mj = j;
}
}
}
for (i = res*res; i; i--, data++)
*data = pow(*data, 0.35);
gwy_container_set_double_by_name(container, "/q", q);
{
gdouble x, y, theta, phi;
x = (mj - hres)*G_SQRT2/(q*hres);
y = (mi - hres)*G_SQRT2/(q*hres);
xy_to_angles(x, y, &theta, &phi);
gwy_container_set_double_by_name(container, "/theta0", theta);
gwy_container_set_double_by_name(container, "/phi0", phi);
}
gwy_container_set_object_by_name(container, "/0/data", dist);
g_object_unref(dist);
gwy_container_set_object_by_name(container, "/theta", dtheta);
g_object_unref(dtheta);
gwy_container_set_object_by_name(container, "/phi", dphi);
g_object_unref(dphi);
gwy_container_set_string_by_name(container, "/0/base/palette",
g_strdup(FVIEW_GRADIENT));
gwy_data_field_data_changed(dist);
}
static void
preview(EntropyControls *controls)
{
EntropyArgs *args = controls->args;
GwyDataField *dfield = controls->dfield;
GwyDataField *mfield = controls->mfield;
GwyGraphModel *gmodel;
GwyGraphCurveModel *gcmodel;
GwyDataLine *ecurve;
gchar buf[24];
gdouble S, s, Smax = 0.0;
ecurve = gwy_data_line_new(1, 1.0, FALSE);
if (args->mode == ENTROPY_VALUES) {
S = gwy_data_field_area_get_entropy_at_scales(dfield, ecurve,
mfield, args->masking,
0, 0,
dfield->xres,
dfield->yres,
0);
s = gwy_data_field_area_get_rms_mask(dfield,
mfield, args->masking,
0, 0, dfield->xres, dfield->yres);
Smax = ENTROPY_NORMAL + log(s);
}
else {
GwyDataField *xder = gwy_data_field_new_alike(dfield, FALSE);
GwyDataField *yder = gwy_data_field_new_alike(dfield, FALSE);
compute_slopes(controls->dfield,
args->fit_plane ? args->kernel_size : 0, xder, yder);
xder = fake_mask(xder, mfield, args->masking);
yder = fake_mask(yder, mfield, args->masking);
if (args->mode == ENTROPY_ANGLES)
transform_to_sphere(xder, yder);
S = gwy_data_field_get_entropy_2d_at_scales(xder, yder, ecurve, 0);
if (args->mode == ENTROPY_SLOPES) {
s = calculate_sigma2_2d(xder, yder);
Smax = ENTROPY_NORMAL_2D + log(s);
}
g_object_unref(xder);
g_object_unref(yder);
}
g_snprintf(buf, sizeof(buf), "%g", S);
gtk_label_set_text(GTK_LABEL(controls->entropy), buf);
if (args->mode != ENTROPY_ANGLES) {
g_snprintf(buf, sizeof(buf), "%g", Smax - S);
gtk_label_set_text(GTK_LABEL(controls->entropydef), buf);
}
else
gtk_label_set_text(GTK_LABEL(controls->entropydef), _("N.A."));
gmodel = gwy_graph_get_model(GWY_GRAPH(controls->graph));
gwy_graph_model_remove_all_curves(gmodel);
g_object_set(gmodel,
"axis-label-bottom", "log h",
"axis-label-left", "S",
"label-position", GWY_GRAPH_LABEL_NORTHWEST,
NULL);
if (gwy_data_line_get_min(ecurve) > -0.5*G_MAXDOUBLE) {
gcmodel = gwy_graph_curve_model_new();
g_object_set(gcmodel,
"description", _("Entropy at scales"),
"mode", GWY_GRAPH_CURVE_LINE_POINTS,
"color", gwy_graph_get_preset_color(0),
NULL);
gwy_graph_curve_model_set_data_from_dataline(gcmodel, ecurve, 0, 0);
gwy_graph_model_add_curve(gmodel, gcmodel);
g_object_unref(gcmodel);
}
if (S > -0.5*G_MAXDOUBLE) {
GwyDataLine *best = gwy_data_line_duplicate(ecurve);
gdouble *ydata = gwy_data_line_get_data(best);
guint i, res = gwy_data_line_get_res(best);
for (i = 0; i < res; i++)
ydata[i] = S;
gcmodel = gwy_graph_curve_model_new();
g_object_set(gcmodel,
"description", _("Best estimate"),
"mode", GWY_GRAPH_CURVE_LINE,
"color", gwy_graph_get_preset_color(1),
NULL);
gwy_graph_curve_model_set_data_from_dataline(gcmodel, best, 0, 0);
gwy_graph_model_add_curve(gmodel, gcmodel);
g_object_unref(gcmodel);
g_object_unref(best);
}
g_object_unref(ecurve);
zoom_in_changed(controls, GTK_TOGGLE_BUTTON(controls->zoom_in));
}