bool
CIRCLE_WIDGET::finish_literal(void)
{
MULTI_CMDptr cmd = new MULTI_CMD;
// Get a mesh to put the new curve into.
LMESHptr mesh = TEXBODY::get_skel_mesh(cmd);
assert(mesh != 0);
Wplane P = get_draw_plane(_literal_shape);
int res_level = 3;
int num_edges = 4; // XXX - default is 4 edges; should be smarter:
// Create the curve
Bcurve* curve = BcurveAction::create(
mesh, _literal_shape, P.normal(), num_edges, res_level, 0, 0, cmd
);
curve->mesh()->update_subdivision(res_level);
// If the curve completes a closed loop (on its own or by
// joining existing curves), fill the interior with a
// "panel" surface:
PanelAction::create(curve->extend_boundaries(), cmd);
WORLD::add_command(cmd);
return true;
}
//! Find a plane associated with the Bcurve; return a
//! parallel plane that contains the given point p.
//! To be used for translating the curve in the plane.
inline Wplane
find_xlate_plane(Bcurve* c, CWpt& p)
{
Wplane P = find_plane(c);
if (P.is_valid())
return Wplane(p, P.normal());
return Wplane();
}
bool
PAPER_DOLL::init(CBcurve_list& contour)
{
if (contour.empty()) {
err_adv(debug, "PAPER_DOLL::init: empty contour");
return false;
}
LMESHptr skel_mesh = contour.mesh();
if (!skel_mesh) {
err_adv(debug, "PAPER_DOLL::init: curves don't share a mesh");
return false;
}
if (!contour.is_each_straight()) {
err_adv(debug, "PAPER_DOLL::init: curves not straight");
return false;
}
if (!contour.forms_closed_chain()) {
err_adv(debug, "PAPER_DOLL::init: curves don't form a closed chain");
return false;
}
if (!contour.is_planar()) {
err_adv(debug, "PAPER_DOLL::init: curves not planar");
return false;
}
Wpt_list pts = contour.get_chain().get_verts().pts();
if (!(pts.size() == 4 || pts.size() == 5)) {
err_adv(debug, "PAPER_DOLL::init: can't do %d-gon", pts.size());
return false;
}
Wplane P;
if (!pts.get_plane(P)) {
err_adv(debug, "PAPER_DOLL::init: can't get plane from contour");
return false;
}
assert(P.is_valid());
Wpt o = pts.average();
Wvec n = P.normal();
// make plane normal point toward camera
if (VIEW::eye_vec(o) * n > 0)
n = -n;
// reverse order of points if needed so they go CCW
// around plane normal:
err_adv(debug, "contour winding number: %f", pts.winding_number(o, n));
if (pts.winding_number(o, n) > 1) {
std::reverse(pts.begin(), pts.end());
}
// create the primitive
MULTI_CMDptr cmd = make_shared<MULTI_CMD>();
Primitive* p = Primitive::init(skel_mesh, pts, P.normal(), cmd);
if (!p) {
err_adv(debug, "PAPER_DOLL::init: Primitive::init() failed");
return false;
}
// hide the curves
// take over drawing the primitive (?)
// or just augment
// activate
delete_all(contour);
get_instance()->init(p);
err_adv(debug, "PAPER_DOLL::init: curves okay");
return true;
}
//! Returns true if the gesture is valid for beginning a circle_widget
//! session.
bool
CIRCLE_WIDGET::init(CGESTUREptr& gest)
{
static bool debug =
Config::get_var_bool("DEBUG_CIRCLE_WIDGET_INIT",false) || debug_all;
err_adv(debug, "CIRCLE_WIDGET::init");
// Get the ellipse description:
PIXEL center; // the center
VEXEL axis; // the long axis (unit length)
double r1, r2; // the long and short radii, respectively
bool suggest_active;
if (!gest->is_ellipse(center, axis, r1, r2)) {
if (!gest->is_almost_ellipse(center, axis, r1, r2)) {
return 0;
} else {
suggest_active = true;
}
} else {
suggest_active = false;
}
Wplane plane = get_draw_plane(center);
if (!plane.is_valid()) {
// didn't work out this time
return false;
}
///////////////////////////////////////////////////////
//
// y1
//
// x0 c ------> x1
// axis
// y0
//
// Project the extreme points of the ellipse to the
// plane and check that after projection they are
// reasonably equidistant from the center.
//
// I.e., the ellipse should reasonably match the
// foreshortened circle as it would actually appear in
// the given plane.
///////////////////////////////////////////////////////
VEXEL perp = axis.perpend();
Wpt x0 = Wpt(plane, Wline(XYpt(center - axis*r1)));
Wpt x1 = Wpt(plane, Wline(XYpt(center + axis*r1)));
Wpt y0 = Wpt(plane, Wline(XYpt(center - perp*r2)));
Wpt y1 = Wpt(plane, Wline(XYpt(center + perp*r2)));
Wpt c = Wpt(plane, Wline(XYpt(center)));
// The two diameters -- we'll check their ratio
double dx = x0.dist(x1);
double dy = y0.dist(y1);
// XXX - Use environment variable for testing phase:
// XXX - don't make static (see below):
double MIN_RATIO = Config::get_var_dbl("EPC_RATIO", 0.85,true);
// Be more lenient when the plane is more foreshortened:
//
// XXX - not sure what the right policy is, but for a
// completely edge-on plane there's certainly no sense in
// doing a real projection... the following drops the
// min_ratio lower for more foreshortened planes:
double cos_theta = VIEW::eye_vec(c) * plane.normal();
double scale = sqrt(fabs(cos_theta)); // XXX - just trying this out
MIN_RATIO *= scale; // XXX - this is why it can't be static
double ratio = min(dx,dy)/max(dx,dy);
err_adv(debug, "CIRCLE_WIDGET::init: projected ratio: %f, min: %f",
ratio, MIN_RATIO);
if (ratio < MIN_RATIO)
return false;
CIRCLE_WIDGETptr me = get_instance();
static const int DISK_RES = Config::get_var_int("DISK_RES", 4,true);
me->_plane = plane;
me->_radius = dx/2;
me->_disk_res = DISK_RES;
me->_center = c;
me->_init_stamp = VIEW::stamp();
if( me->_suggest_active = suggest_active ) {
me->create_literal(gest);
}
//PIXEL gest_center = gest->center();
me->make_preview();
return go();
}
