//! 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
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;
}
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
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);
}
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);
}
//! 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
}
inline Wvec
endpt_vec(CGESTUREptr& g, CWplane& P)
{
return Wpt(P, Wline(g->end())) - Wpt(P, Wline(g->start()));
}
int
SELECT_WIDGET:: slash_cb(CGESTUREptr& gest, DrawState*& s)
{
if (_mode==SEL_FACE) //widget is in face selection mode
{
select_list.clear();
Bface* f = find_face(gest->start(),0.25,MIN_PIX_AREA);
// f should be the currently selected face
if (f && f->is_selected() && f->is_quad())
{
f=f->quad_rep();
//line in screen space coresponding to the slash
PIXELline slash(gest->start(),gest->end());
Bedge *e1,*e2,*e3,*e4;
Bedge* edge = 0;
//get and test the quad edges against the stroke line
f->get_quad_edges(e1,e2,e3,e4);
if( e1->pix_line().intersect_segs(slash) )
{
edge=e1;
}
else
if( e2->pix_line().intersect_segs(slash) )
{
edge=e2;
}
else
if( e3->pix_line().intersect_segs(slash) )
{
edge=e3;
}
else
if( e4->pix_line().intersect_segs(slash) )
{
edge=e4;
}
else
{
//error
cerr << "ERROR no intersection" << endl;
return 1;
}
//walk the geometry and select faces
Bface* fn = f;
do
{
if (!fn->is_selected())
select_list +=fn;
assert(edge); //I'm paranoid too
assert(edge->f1()!=edge->f2());
//grabs the face on the other side of the edge
//even if we are not directly adjacent to this edge
fn=fn->other_quad_face(edge);
if (fn) //if a valid face than advance the edge pointer
{
assert(edge!=fn->opposite_quad_edge(edge));
edge = fn->opposite_quad_edge(edge);
fn = fn->quad_rep(); //all faces on the selection list are rep faces
}
else
cerr << "No face on the other side of the edge" << endl;
} //quit if not a valid face or not a quad
while(fn&&(fn->is_quad())&&edge&&(fn!=f));
_mode=SLASH_SEL; //go into pattern editing mode
end_face=0; //prepare the 2nd step data
pattern=0;
for (int i=0; i<MAX_PATTERN_SIZE; i++)
pattern_array[i]=1; //fill the default pattern with ones
}
else
cerr << "This is not a quad" << endl;
}
else
if( _mode==SLASH_SEL)//pattern editing mode
{ //activates upon second slash motion
//adds the entire list to the selected group
//undo deselects the entire group
Bface_list final_list;
//copy the face pointers to the final list
//using the pattern as a repeating template
//and stop at the end face
for (int i = 0; i<(end_face ? (end_face) : select_list.num()) ; i++)
{
if (pattern ? pattern_array[(i%pattern)+1] : 1)
final_list+=select_list[i];
}
WORLD::add_command(new MESH_SELECT_CMD(final_list));
return cancel_cb(gest,s);
}
else
cerr << "wrong mode " << endl;
return 1;
}