int
TRACE::tap_cb(CGESTUREptr& gest, DrawState*& s)
{
assert (gest->is_tap());
if (_calib_mode_flag) {
// we are in calibration point
XYpt sample = gest->end();
_samples[_cur_calib_pt_index] = sample;
cerr << "recorded sample " << _cur_calib_pt_index << endl;
_cur_calib_pt_index++;
/* seems impractical to distort image, leaving this at 2 - alexni
if (_cur_calib_pt_index == 4) {
*/
if (_cur_calib_pt_index == 2) {
// if we have sampled four points, we are done with calibration
_calib_mode_flag = false;
_calibrated = true;
WORLD::message("Calibration complete");
}
return 1;
} else return 0;
}
int
CIRCLE_WIDGET::tap_cb(CGESTUREptr& g, DrawState*& s)
{
err_adv(debug_all, "CIRCLE_WIDGET::tap_cb()");
PIXEL pdummy;
int idummy;
if( _suggest_active ) {
_preview.update_length();
_literal_shape.update_length();
double preview_dist = PIXEL_list(_preview).closest( PIXEL(g->start()), pdummy, idummy );
double literal_dist = PIXEL_list(_literal_shape).closest( PIXEL(g->start()), pdummy, idummy );
if( preview_dist < literal_dist && preview_dist < PIXEL_DIST_THRESH ) {
_suggest_active = false;
make_preview();
return 1;
} else if( literal_dist < preview_dist && literal_dist < PIXEL_DIST_THRESH ) {
finish_literal();
return cancel_cb(g,s);
} else {
return cancel_cb(g,s);
}
}
if (_cmd)
WORLD::add_command(_cmd);
return cancel_cb(g,s);
}
//! Draw a straight line cross-ways to an existing
//! straight Bcurve to create a rectangle:
bool
SWEEP_LINE::create_rect(CGESTUREptr& gest)
{
static bool debug =
Config::get_var_bool("DEBUG_CREATE_RECT",false) || debug_all;
err_adv(debug, "SWEEP_LINE::create_rect");
if (!(gest && gest->is_line())) {
err_adv(debug, "SWEEP_LINE::create_rect: gesture is not a line");
return false;
}
// central axis must be on-screen
if (!sweep_origin().in_frustum()) {
err_adv(debug_all, "SWEEP_LINE::stroke_cb: error: sweep origin off-screen");
return false;
}
if (!from_center(gest)) {
WORLD::message("Stroke must begin on curve at guideline");
return false;
}
if (!hits_line(gest->end())) {
WORLD::message("Line must follow axis");
return false;
}
// compute vector along guideline, based on input stroke:
Wvec v = project_to_guideline(gest->end()) - sweep_origin();
return create_rect(v);
}
int
SELECT_WIDGET::tap_cb(CGESTUREptr& g, DrawState*& s)
{
err_adv(debug, "SELECT_WIDGET::tap_cb()");
assert(g && g->is_tap());
if (_mode==SLASH_SEL)
{
//pattern editing
Bface* f = find_face(g->start(),0.25,MIN_PIX_AREA);
if (f) {
if (select_list.contains(f)||select_list.contains(f->quad_partner()))
{
//get whichever part of the quad is in the selection list
int temp = select_list.contains(f) ? select_list.get_index(f)+1 : select_list.get_index(f->quad_partner())+1 ;
if (temp>end_face) //user selected the end face
{
end_face=temp;
}
else //user is selecting a pattern
{
if (pattern<temp)
pattern=temp;
//select/deselect face
if (temp < MAX_PATTERN_SIZE)
pattern_array[temp]=!pattern_array[temp];
}
return 1;
}
else
cerr << "tap found a NULL face !" << endl;
}
return cancel_cb(g,s);
}
else
{
// Tap a selected face near the middle to deselect it:
if (try_deselect_face(g->center(), 0.25))
return 1;
// Tap edge to deselect
if (try_deselect_edge(g->center()))
return 1;
}
// Otherwise, turn off SELECT_WIDGET
return cancel_cb(g,s);
}
//! Given a set of enclosed face, activate the widget to sweep out a
//! shape. Checks for errors, returns true on success.
bool
SWEEP_DISK::setup(CGESTUREptr& gest, double dur)
{
static bool debug =
Config::get_var_bool("DEBUG_SWEEP_SETUP",false) || debug_all;
if (!(gest && gest->is_dslash())) {
err_adv(debug, "SWEEP_DISK::setup: bad gesture");
return false;
}
// XXX - shouldn't require it is a Panel:
Panel* p = dynamic_cast<Panel*>(Bsurface::hit_ctrl_surface(gest->start()));
if (!p) {
err_adv(debug, "SWEEP_DISK::setup: non-panel");
return false;
}
Bface_list faces = p->bfaces();
_boundary = faces.get_boundary();
if (_boundary.num_line_strips() != 1) {
err_adv(debug, "SWEEP_DISK::setup: error: boundary is not a single piece");
return false;
}
// Get the best-fit plane, rejecting if the boundary Wpt_list
// doesn't lie within 0.1 of its total length from the plane:
if (!_boundary.verts().pts().get_plane(_plane, 0.1)) {
err_adv(debug,"SWEEP_DISK::setup: Error: can't find plane");
return false;
}
// Find the center
Wpt o = _boundary.verts().pts().average();
// decide guideline direction (normal to plane):
Wvec n = _plane.normal();
if (VIEW::eye_vec(o) * n > 0)
n = -n;
// decide the length for the guideline:
double len = world_length(o, GUIDE_LEN);
// compute guideline endpoint:
Wpt b = o + n.normalized()*len;
// try basic setup
if (!SWEEP_BASE::setup(dynamic_pointer_cast<LMESH>(faces.mesh()), o, b, dur))
return false;
// ******** From here on we accept it ********
_enclosed_faces = faces;
return true;
}
int
SELECT_WIDGET::stroke_cb(CGESTUREptr& g, DrawState*&)
{
assert(g);
select_faces(g->pts()) || select_edges(g->pts());
return 1;
}
int
SELECT_WIDGET::sm_circle_cb(CGESTUREptr& g, DrawState*& s)
{
err_adv(debug, "SELECT_WIDGET::sm_circle_cb()");
try_select_face(g->center(), 0.25) || try_select_edge(g->center());
return 1;
}
int
XformPen::tap_cb(CGESTUREptr& tap, DrawState*& s)
{
assert(tap);
if (tap->is_double_tap()) {
// should never happen given order of arcs in XformPen constructor
cerr << "XformPen::tap_cb: error: gesture is double tap"
<< endl;
return 0;
}
// tap on cursor?
BMESHray ray(tap->center());
_view->intersect(ray);
Cursor3D* c = Cursor3D::upcast(ray.geom());
if (c) {
err_adv(debug, "XformPen::tap_cb: hit axis");
c->handle_gesture(tap);
return 0;
}
// tap on mesh?
_mesh = 0;
Bface* f = cur_face();
if (!f) {
err_adv(debug, "XformPen::tap_cb: missed face");
return cancel_cb(tap, s);
}
BMESH* m = f->mesh();
if (!m) {
err_adv(debug, "XformPen::tap_cb: hit face, no mesh");
return cancel_cb(tap, s);
}
GEOMptr g = bmesh_to_geom(m);
if (!g) {
err_adv(debug, "XformPen::tap_cb: hit mesh, no geom");
return cancel_cb(tap, s);
}
// skip floor:
if (FLOOR::isa(g)) {
err_adv(debug, "XformPen::tap_cb: hit floor, skipping...");
return cancel_cb(tap, s);
}
// tap on ordinary mesh (not floor):
_mesh = m;
assert(_mesh);
BMESH::set_focus(_mesh, f->patch());
FLOOR::show();
FLOOR::realign(_mesh,0); // 0 = no undo command
Cursor3D::attach(g);
return 0;
}
int
INFLATE::stroke_cb(CGESTUREptr& gest, DrawState*& s)
{
err_adv(debug, "INFLATE::stroke_cb");
reset_timeout();
// Verify that we have a starting face
if ( _orig_face ) {
Bface* face = 0;
// Check that the stroke is straight enough to represent a line
if (!(gest->straightness() > 0.8)) {
err_adv(debug, "INFLATE::stroke_cb: gesture not straight");
return false;
}
// Check that the gesture starts on the mesh
Bsurface::hit_ctrl_surface(gest->start(), 1, &face);
if (!(face)) {
err_adv(debug, "INFLATE::stroke_cb: can't get hit face");
return false;
}
// create VEXELs for the gesture and the face normal
VEXEL fvec = VEXEL(face->v1()->loc(), face->norm());
VEXEL fgest = gest->endpt_vec();
// If gesture nearly parallel to normal:
double a = rad2deg(line_angle(fvec,fgest));
err_adv(debug, "INFLATE::stroke_cb: angle: %f %s",
a, (a > 15) ? "(bad)" : "(good)");
if (a > 15) {
// Fail if angle is too extreme
WORLD::message("Bad angle");
return 0;
}
// calculate extrude width
double dist = fgest.length()/fvec.length();
err_adv(debug, "INFLATE::stroke_cb: strong_edge_len: %f, gest_len: %f, \
fvect_len: %f", avg_strong_edge_len(face), fgest.length(), fvec.length() );
// Convert to relative to local edge length
dist /= avg_strong_edge_len(face);
if (fvec*fgest<0)
dist=-dist; // Get the sign right
// Store the new inflate distance
_preview_dist = dist;
}
return 1; // we used up the gesture...
}
bool
PAPER_DOLL::init(CGESTUREptr& g)
{
if (!(g && g->is_stroke()))
return false;
if (g->below_min_length() || g->below_min_spread())
return false;
if (!g->is_ellipse()) {
err_adv(debug, "PAPER_DOLL::init: non-ellipse");
return false;
}
Panel* p = dynamic_cast<Panel*>(
Bsurface::get_surface(get_top_level(VisRefImage::get_faces(g->pts())))
);
err_adv(debug, "PAPER_DOLL::init: %s panel", p?"found":"could not find");
if (!(p && p->is_selected())) {
err_adv(debug, "PAPER_DOLL::init: ellipse not over selected panel");
return false;
}
assert(p && p->bfaces().size() > 0);
Bface_list faces = Bface_list::reachable_faces(p->bfaces().front());
assert(!faces.empty());
if (!faces.is_planar(deg2rad(1.0))) {
err_adv(debug, "PAPER_DOLL::init: region is not planar");
return false;
}
EdgeStrip boundary = faces.get_boundary();
if (boundary.empty()) {
err_adv(debug, "PAPER_DOLL::init: region has no boundary");
return false;
}
Bsurface_list surfs = Bsurface::get_surfaces(faces);
if (!are_all_bsurfaces<Panel>(surfs)) {
err_adv(debug, "PAPER_DOLL::init: region not all panels");
return 0;
}
err_adv(debug, "PAPER_DOLL::init: proceeding...");
err_adv(debug, " boundary edges: %d, components: %d, panels: %d",
boundary.edges().size(), boundary.num_line_strips(), surfs.num()
);
if (get_instance()->build_primitive(faces)) {
err_adv(debug, " ... succeeded");
return true;
}
err_adv(debug, " ... failed");
return false;
}
//! Currently checks to see that the gesture was a small circle.
//! If so, this may be an indication that the user wants to go
//! into edge selection mode. It then executes try_select_edge()
//! to try to find the edge. When successful, the widget enters
//! edge selection mode.
bool
SELECT_WIDGET::init_select_edge(CGESTUREptr& g)
{
if (!g->is_small_circle())
return false;
if (!try_select_edge(g->center()))
return false;
_mode = SEL_EDGE;
reset_timeout();
activate();
return true;
}
void
Pen::notify_gesture(GEST_INT* gi, CGESTUREptr& gest)
{
if (Config::get_var_bool("DEBUG_GESTURES",false)) {
gest->print_stats();
gest->print_types();
}
_fsa.handle_event(gest);
if (_fsa.is_reset())
gi->reset();
}
int
INFLATE::line_cb(CGESTUREptr& gest, DrawState*& s)
{
// Activity occurred to extend the deadline for fading away:
reset_timeout();
err_adv(debug, "INFLATE::line_cb");
// Verify that we have a starting face
if ( _orig_face ) {
// Check that the stroke is straight enough to represent a line
Bface* face = 0;
if (!(gest->straightness() > 0.8)) {
err_adv(debug, "INFLATE::line_cb: gesture not straight");
return false;
}
// Check that the gesture starts on the mesh
Bsurface::hit_ctrl_surface(gest->start(), 1, &face);
if (!(face)) {
err_adv(debug, "INFLATE::line_cb: can't get hit face");
return false;
}
// create VEXELs for the gesture and the face normal
VEXEL fvec = VEXEL(face->v1()->loc(), face->norm());
VEXEL fgest = gest->endpt_vec();
// If gesture nearly parallel to normal:
double a = rad2deg(line_angle(fvec,fgest));
err_adv(debug, "INFLATE::line_cb: angle: %f %s",
a, (a > 15) ? "(bad)" : "(good)");
if (a > 15) {
return false;
}
// calculate extrude width
double dist = fgest.length()/fvec.length();
if (fvec*fgest<0)
dist=-dist; // Get the sign right
_preview_dist = dist;
}
// get here if nothing happened...
// don't cancel (which would deactivate the widget),
// just return 1 to indicate that we used up the gesture:
return 1;
}
bool
OVERSKETCH::find_matching_sil(CGESTUREptr& g)
{
err_adv(debug, "OVERSKETCH::find_matching_sil");
const size_t MIN_GEST_PTS = 10;
if (!(g && g->pts().size() >= MIN_GEST_PTS))
return false;
if (BMESH::_freeze_sils)
return false;
VisRefImage *vis_ref = VisRefImage::lookup(VIEW::peek());
if (!vis_ref)
return false;
// 1. see if the gesture runs along a silhouette
// of a single mesh.
SilEdgeFilter sil_filter;
const PIXEL_list& pts = g->pts();
BMESHptr mesh = nullptr;
for (PIXEL_list::size_type i=0; i<pts.size(); i++) {
Bedge* e = (Bedge*)
vis_ref->find_near_simplex(pts[i], SIL_SEARCH_RAD, sil_filter);
if (!(e && e->mesh())) {
err_adv(debug, " gesture too far from silhouette");
return false;
}
if (mesh && mesh != e->mesh()) {
err_adv(debug, " found a second mesh, rejecting");
return false;
}
mesh = e->mesh();
}
if (!dynamic_pointer_cast<LMESH>(mesh)) {
err_adv(debug, " found non-LMESH, rejecting");
return false;
}
err_adv(debug, " gesture aligns with silhouette");
err_adv(debug, " mesh level %d", mesh->subdiv_level());
// 2. extract the portion of the silhouette that matches
// the gesture, store in _selected_sils
return find_matching_sil(pts, mesh->sil_strip());
}
bool
OVERSKETCH::init(CGESTUREptr& g)
{
if (!(g && g->is_stroke()))
return false;
if (g->below_min_length() || g->below_min_spread())
return false;
if (get_instance()->find_matching_sil(g))
return true;
// add more cases here...
return false;
}
int
NPRPen::tap_cb(CGESTUREptr& gest, DrawState*&)
{
cerr << "NPRPen::tap_cb" << endl;
Bface *f = VisRefImage::Intersect(gest->center());
Patch* p = get_ctrl_patch(f);
if (!(f && p)) {
if (_curr_npr_tex)
deselect_current_texture();
return 0;
}
// Set the selected face's patch to using NPRTexture
// It might already be doing this, but who cares!
p->set_texture(NPRTexture::static_name());
GTexture* cur_texture = p->cur_tex();
NPRTexture* nt = dynamic_cast<NPRTexture*>(cur_texture);
if (nt == nullptr)
return 0; //Shouldn't happen
if (_curr_npr_tex)
{
if (_curr_npr_tex != nt)
{
deselect_current_texture();
select_current_texture(nt);
}
}
else
select_current_texture(nt);
return 0;
}
int
SWEEP_BASE::trim_line_cb(CGESTUREptr& g, DrawState*&)
{
// Activity occurred to extend the deadline for fading away:
reset_timeout();
// A slash gesture across the guideline trims its tip
static bool debug =
Config::get_var_bool("DEBUG_SWEEP_TRIM",false) || debug_all;
err_adv(debug, "SWEEP_BASE::trim_cb");
// Find where the slash intersects the guideline.
PIXEL p;
if (g->endpt_line().intersect_segs(pix_line(), p)) {
// Reset the endpoint to match screen position p:
reset_endpoint(p);
return 1;
}
// The slash gesture missed the guideline...
// XXX - policy on failure?
err_adv(debug, "SWEEP_BASE::trim_line_cb: Missed the guideline");
return 1; // This means we DID use up the gesture
}
bool
PatternPen::compute_target_cell(CGESTUREptr& gest){
if (_target_cell) {
print_target_cell();
}
int nb_pts = gest->pts().num();
if (nb_pts < 2) return false;
if (_current_cell_type == BBOX_CELL){
_target_cell = new BBoxCell(gest->pts()[0], gest->pts()[nb_pts-1]);
} else if (_current_cell_type == RECT_CELL){
double thickness;
GESTUREptr axis_gesture;
update_rect_drawer(gest, axis_gesture, thickness);
if (axis_gesture) {
_target_cell = new RectCell(axis_gesture, thickness);
} else {
return false;
}
} else if (_current_cell_type == PATH_CELL){
double thickness;
GESTUREptr axis_gesture;
update_path_drawer(gest, axis_gesture, thickness);
if (axis_gesture) {
_target_cell = new PathCell(axis_gesture, thickness);
} else {
return false;
}
} else if (_current_cell_type == CARRIER_CELL){
GESTUREptr first_gesture;
GESTUREptr second_gesture;
update_carrier_drawer(gest, first_gesture, second_gesture);
if (first_gesture) {
_target_cell = new CarriersCell(first_gesture, second_gesture);
} else {
return false;
}
} else {
return false;
}
_target_cell->set_global_scale(_current_global_scale);
return true;
}
int
SWEEP_BASE::tap_cb(CGESTUREptr& g, DrawState*& s)
{
err_adv(debug_all, "SWEEP_BASE::tap_cb");
// tap near end of guideline: do uniform sweep based
// on guideline length:
if (g->center().dist(sweep_end()) < DIST_THRESH_PIXELS)
return do_uniform_sweep(sweep_vec());
// tap elsewhere on the guideline: do uniform sweep based
// on tap location:
if (hits_line(g->end()))
return do_uniform_sweep(project_to_guideline(g->end()) - sweep_origin());
// tap elsewhere: cancel:
return cancel_cb(g,s);
}
int
OVERSKETCH::stroke_cb(CGESTUREptr& gest, DrawState*& s)
{
err_adv(debug, "OVERSKETCH::stroke_cb");
assert(gest);
try_oversketch(gest->pts());
return 1; // This means we did use up the gesture
}
int
INFLATE::tap_cb(CGESTUREptr& gest, DrawState*& state)
{
err_adv(debug, "INFLATE::tap_cb");
// Tracks if the tap was near a guideline
bool near_guidelines = false;
PIXEL pdummy;
int idummy;
if ( PIXEL_list(_lines).closest( PIXEL(gest->start()), pdummy, idummy ) < 5 )
near_guidelines = true;
// Check if gesture hits a BFace
Bface* face = 0;
Bsurface::hit_ctrl_surface(gest->start(), 1, &face);
// Fail if Gesture missed guidelines and geometry
if ( !face && !near_guidelines )
return cancel_cb(gest,state);
// Check that we are trying to inflate
if ( _orig_face ) {
// Find the reachable faces from the starting point
Bface_list set
= _mode ? _faces : Bface_list::reachable_faces(_orig_face);
// verify that the user tapped a face that is part of the inflation region
if ( face && !set.contains( face ) ) {
return cancel_cb(gest,state);
}
// Attempt to inflate the surface
INFLATE_CMDptr cmd = _mode ? (new INFLATE_CMD( _faces, _preview_dist )) :
(new INFLATE_CMD( _orig_face, _preview_dist ));
WORLD::add_command(cmd);
}
// On fail, cancel
return cancel_cb(gest,state);
}
///////////////////
// Proxy methods
///////////////////
void
PatternPen::add_stroke_to_proxy(CGESTUREptr& gest)
{
if (gest->pts().num() < 2) {
WORLD::message("Failed to generate hatch stroke (too few samples)...");
return;
}
//NDCpt_list ndcpts = gest->pts();
//if (_pattern_texture)
//_pattern_texture->proxy_surface()->add(
// gest->pts(),gest->pressures(), _gesture_drawer->base_stroke_proto());
}
//! Given an initial slash gesture (or delayed slash) on a
//! defined plane (FLOOR, Cursor3D, or existing Bpoint), set up
//! the widget to provide a guideline for drawing a straight line.
bool
SWEEP_POINT::setup(CGESTUREptr& slash, double dur)
{
static bool debug =
Config::get_var_bool("DEBUG_SWEEP_SETUP",false) || debug_all;
err_adv(debug, "SWEEP_POINT::setup");
// check the gesture
if (!(slash && slash->straightness() > 0.9)) {
err_adv(debug, "SWEEP_POINT::setup: gesture is bad");
return false;
}
// find the (straight) Bpoint near slash start
_point = Bpoint::hit_ctrl_point(slash->start());
return false;
// return SWEEP_BASE::setup(_curve->mesh(), o, endpt, dur);
}
int
CIRCLE_WIDGET::stroke_cb(CGESTUREptr& g, DrawState*&)
{
err_adv(debug_all, "CIRCLE_WIDGET::stroke_cb()");
// Activity occurred to extend the deadline for fading away:
reset_timeout();
// sanity check
assert(g);
if( !g->is_line() )
return 1;
_preview.update_length();
if (PIXEL_list(_preview).dist(g->start()) < PIXEL_DIST_THRESH ||
g->start().dist(_center) < PIXEL_DIST_THRESH ) {
if ( _circle ) {
Bcurve *border = Bcurve::lookup(_circle->bfaces().get_boundary().edges());
if ( border != 0 ) {
Wplane plane = border->plane();
_radius = _center.dist(Wpt(plane, Wline(XYpt(g->end()))));
}
} else {
Wplane P = get_draw_plane(g->end());
if (!P.is_valid())
return 1;
_radius = _center.dist(Wpt(P, Wline(XYpt(g->end()))));
}
make_preview();
}
return 1;
}
//! They want to make the guideline longer.
//! It's easy.
int
SWEEP_BASE::extend_line_cb(CGESTUREptr& g, DrawState*&)
{
static bool debug =
Config::get_var_bool("DEBUG_SWEEP_BASE_EXTEND",false) || debug_all;
if (debug)
err_msg("SWEEP_BASE::extend_line_cb");
reset_endpoint(g->end());
return 1; // This means we DID use up the gesture
}
int
PatternPen::tap_cb(CGESTUREptr& gest, DrawState*& s){
// err_msg("PatternPen::tap_cb()");
if (_mode == PROXY){
Bface* f;
f = VisRefImage::Intersect(gest->center());
if(f)
init_proxy(f);
} else {
return stroke_cb(gest, s);
}
return 1;
}
void
PatternPen::update_path_drawer(CGESTUREptr& gest, GESTUREptr& axis_gesture, double& thickness){
if (_path_gesture){
thickness = gest->endpoint_dist();
axis_gesture = new GESTURE(*_path_gesture);
_path_gesture = GESTUREptr();
} else {
_path_gesture = new GESTURE(*gest);
_path_gesture->set_drawer(_blank_gesture_drawer);
}
_path_gesture_drawer->set_path(_path_gesture);
}
int
SWEEP_BASE::line_cb(CGESTUREptr& g, DrawState*& s)
{
// Activity occurred to extend the deadline for fading away:
reset_timeout();
static bool debug =
Config::get_var_bool("DEBUG_SWEEP_LINE_CB",false) || debug_all;
err_adv(debug, "SWEEP_BASE::line_cb");
// If gesture aligns with guideline:
// if it starts near the end and extends past the end, extend
// if it starts near the beginning, do uniform sweep
// If it's across the gesture, trim
// If it's a trim stroke, it has to be short and run
// across the guideline.
const double TRIM_MAX_LEN = 65;
if (g->length() < TRIM_MAX_LEN) {
const double TRIM_ANGLE_THRESH = 80; // degrees
double angle = line_angle(g->endpt_vec(), pix_line().direction());
if (rad2deg(angle) > TRIM_ANGLE_THRESH) {
// Nice angle. But did it cross?
if (g->endpt_line().intersect_segs(pix_line()))
return trim_line_cb(g, s);
}
}
// do uniform sweep if straight gesture starts at sweep origin
// and ends near the guideline:
if (from_center(g)) {
if (hits_line(g->end()))
return do_uniform_sweep(project_to_guideline(g->end()) - sweep_origin());
return stroke_cb(g,s);
}
// extend the guideline if straight gesture starts near guideline end
// and is nearly parallel:
const double ALIGN_ANGLE_THRESH = 15; // degrees
if (pix_line().endpt().dist(g->start()) < DIST_THRESH_PIXELS &&
rad2deg(g->endpt_vec().angle(pix_line().direction())) < ALIGN_ANGLE_THRESH)
return extend_line_cb(g, s);
return stroke_cb(g,s);
}
bool
SWEEP_BASE::from_center(CGESTUREptr& g) const
{
assert(g != nullptr);
return g->start().dist(sweep_origin()) < DIST_THRESH_PIXELS;
}
//! Given an initial slash gesture (or delayed slash) near the
//! center of an existing straight Bcurve, set up the widget to
//! do a sweep cross-ways to the Bcurve:
bool
SWEEP_LINE::setup(CGESTUREptr& slash, double dur)
{
static bool debug =
Config::get_var_bool("DEBUG_SWEEP_SETUP",false) || debug_all;
err_adv(debug, "SWEEP_LINE::setup");
// check the gesture
if (!(slash && slash->straightness() > 0.99)) {
err_adv(debug, "SWEEP_LINE::setup: gesture is bad");
return false;
}
// find the (straight) Bcurve near slash start
_curve = Bcurve::hit_ctrl_curve(slash->start());
if (!(_curve && _curve->is_straight())) {
err_adv(debug, "SWEEP_LINE::setup: no straight curve at start");
return false;
}
// find endpoints
Bpoint *b1 = _curve->b1(), *b2 = _curve->b2();
assert(b1 && b2); // straight curve must have endpoints
// curve cannot be connected to other curves
if (b1->vert()->degree() != 1 || b2->vert()->degree() != 1) {
err_adv(debug, "SWEEP_LINE::setup: curve is not isolated");
return false;
}
// ensure the gesture starts near the center of the straight line Bcurve:
{
PIXEL a = b1->vert()->pix();
PIXEL b = b2->vert()->pix();
double t = (slash->start() - a).tlen(b-a);
if (t < 0.35 || t > 0.65) {
err_adv(debug, "SWEEP_LINE::setup: gesture not near center of line");
return false;
}
}
// find the plane to work in
_plane = check_plane(shared_plane(b1, b2));
if (!_plane.is_valid()) {
err_adv(debug, "SWEEP_LINE::setup: no valid plane");
return false;
}
// check that slash is perpendicular to line
Wpt a = b1->loc(); // endpoint at b1
Wpt b = b2->loc(); // endpoint at b2
Wvec t = b - a; // vector from endpt a to endpt b
Wpt o = a + t/2; // center of straight line curve
Wvec n = cross(_plane.normal(), t); // direction across line ab
Wvec slash_vec = endpt_vec(slash, _plane);
const double ALIGN_ANGLE_THRESH = 15;
double angle = rad2deg(slash_vec.angle(n));
if (angle > 90) {
angle = 180 - angle;
n = -n;
}
if (angle > ALIGN_ANGLE_THRESH) {
err_adv(debug, "SWEEP_LINE::setup: slash is not perpendicular to line");
err_adv(debug, " angle: %f", angle);
return false;
}
// compute guideline endpoint:
Wpt endpt = o + n.normalized()*a.dist(b);
return SWEEP_BASE::setup(_curve->mesh(), o, endpt, dur);
}
