QPolygonF bezier_fit_cubic_single( const QPolygonF& data, double error )
{
QPolygonF out(4);
const int retn = sp_bezier_fit_cubic(out.data(), data.data(),
data.count(), error);
if( retn >= 0 )
return out;
else
return QPolygonF();
}
static void
fit_and_split (SPDrawContext * dc)
{
NRPointF b[4];
gdouble tolerance;
g_assert (dc->npoints > 1);
tolerance = SP_EVENT_CONTEXT (dc)->desktop->w2d[0] * TOLERANCE;
tolerance = tolerance * tolerance;
if (sp_bezier_fit_cubic (b, dc->p, dc->npoints, tolerance) > 0 && dc->npoints < SP_DRAW_POINTS_MAX) {
/* Fit and draw and reset state */
sp_curve_reset (dc->red_curve);
sp_curve_moveto (dc->red_curve, b[0].x, b[0].y);
sp_curve_curveto (dc->red_curve, b[1].x, b[1].y, b[2].x, b[2].y, b[3].x, b[3].y);
sp_canvas_bpath_set_bpath (SP_CANVAS_BPATH (dc->red_bpath), dc->red_curve);
} else {
SPCurve *curve;
SPCanvasItem *cshape;
/* Fit and draw and copy last point */
g_assert (!sp_curve_empty (dc->red_curve));
sp_curve_append_continuous (dc->green_curve, dc->red_curve, 0.0625);
curve = sp_curve_copy (dc->red_curve);
/* fixme: */
cshape = sp_canvas_bpath_new (SP_DT_SKETCH (SP_EVENT_CONTEXT (dc)->desktop), curve);
sp_curve_unref (curve);
sp_canvas_bpath_set_stroke (SP_CANVAS_BPATH (cshape), dc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
dc->green_bpaths = g_slist_prepend (dc->green_bpaths, cshape);
dc->p[0] = dc->p[dc->npoints - 2];
dc->p[1] = dc->p[dc->npoints - 1];
dc->npoints = 2;
}
}
