/////////////////////////////////////
// notify_change()
/////////////////////////////////////
void
HatchingHatchFixed::notify_change(BMESHptr m, BMESH::change_t chg)
{
assert(chg == BMESH::VERT_POSITIONS_CHANGED);
vector<HatchingFixedVertex>::size_type k;
if (_verts.size() > 0) {
//Sanity check
assert(_verts.size() == _pts.size());
assert(_verts.size() == _norms.size());
for (k=0; k < _verts.size(); k++) {
Bface *f = m->bf(_verts[k].ind);
assert(f);
f->bc2pos(_verts[k].bar,_pts[k]);
f->bc2norm_blend(_verts[k].bar,_norms[k]);
}
//Clear these cached values so they regenerate
_real_pts.clear();
_real_norms.clear();
_real_good.clear();
}
else
{
err_mesg(ERR_LEV_WARN, "HatchingHatchFixed::notify_change() - Verts changed, but we can't update fixed hatches!!!");
}
}
/////////////////////////////////////
// add()
/////////////////////////////////////
bool
HatchingGroupFixed::add(
CNDCpt_list &pl,
const vector<double>&prl,
int curve_type
)
{
size_t k;
double a,b;
Bface *f;
// It happens:
if (pl.empty()) {
err_mesg(ERR_LEV_ERROR, "HatchingGroupFixed:add() - Error: point list is empty!");
return false;
}
if (prl.empty()) {
err_mesg(ERR_LEV_ERROR, "HatchingGroupFixed:add() - Error: pressure list is empty!");
return false;
}
if (pl.size() != prl.size()) {
err_mesg(ERR_LEV_ERROR, "HatchingGroupFixed:add() - gesture pixel list and pressure list are not same length.");
return false;
}
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed:add() - smoothing gesture.");
//Smooth the input gesture
NDCpt_list smoothpts;
vector<double> smoothprl;
if (!smooth_gesture(pl, smoothpts, prl, smoothprl, _params.anim_style()))
return false;
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed:add() - clipping gesture to model.");
NDCpt_list ndcpts;
vector<double> finalprl;
clip_to_patch(smoothpts, ndcpts, smoothprl, finalprl);
ndcpts.update_length();
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed::add() - Checking gesture silliness.");
if (HatchingGroupBase::is_gesture_silly(ndcpts,_params.anim_style()))
{
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Punting silly gesture...");
return false;
}
//Even if the user wants to project to create the
//hatch, we continue with plane cutting to
//generate a curve we can use to estimate
//the mesh spacing so that the final projected
//hatch is sampled evenly on the level of the mesh
//spacing
//Get the cutting line
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed:add() - fitting line.");
if (!fit_line(ndcpts,a,b)) return false;
//Slide to midpoint if desired
if (Config::get_var_bool("HATCHING_GROUP_SLIDE_FIT",false,true))
b = ndcpts.interpolate(0.5)[1] - (a*ndcpts.interpolate(0.5)[0]);
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed:add() - computing plane.");
//Find the cutting plane
Wplane wpPlane;
f = compute_cutting_plane(_patch, a, b, ndcpts, wpPlane);
if (!f) return false;
else
{
if (!f->front_facing())
{
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Nearest pt. on fit line hit backfacing surface.");
return false;
}
}
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed:add() - slicing mesh.");
//Intersect the mesh to get a 3D curve
Wpt_list wlList;
slice_mesh_with_plane(f,wpPlane,wlList);
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed:add() - cliping curve to gesture.");
//Clip end of 3D curve to match gesture
Wpt_list wlClipList;
clip_curve_to_stroke(_patch, ndcpts, wlList, wlClipList);
wlClipList.update_length();
Wpt_list wlScaledList;
if (curve_type == HatchingGroup::CURVE_MODE_PROJECT) {
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed::add() - Projecting to surface.");
//Okay, the user wants to get literal, projected
//points, so lets do it. We're careful to
//toss points that hit the no/wrong mesh
Wpt_list wlProjList;
Wpt wloc;
for (k=0; k<ndcpts.size(); k++) {
f = HatchingGroupBase::find_face_vis(NDCpt(ndcpts[k]),wloc);
if ((f) && (f->patch() == _patch) && (f->front_facing())) {
wlProjList.push_back(wloc);
} else {
if (!f)
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Missed while projecting: No hit on a mesh!");
else if (!(f->patch() == _patch))
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Missed while projecting: Hit wrong patch.");
else if (!f->front_facing())
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Missed while projecting: Hit backfacing tri.");
else
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Missed while projecting: WHAT?!?!?!?!");
}
}
if (wlProjList.size()<2) {
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed:add() - Nothing left after projection failures. Punting...");
return false;
}
wlProjList.update_length();
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed::add() - Resampling curve.");
//Resample to even spacing in world space. Sample
//at a world distance similar to wlClipList, which
//will be on the order of the mesh resolution
//unless the gesture fits into one triangle,
//in which case we ensure a minimum sampling
int guess = (int)ceil(((double)wlClipList.size()*
(double)wlProjList.length())/(double)wlClipList.length());
size_t num = max(guess,5);
double step = 1.0/((double)(num-1));
for (k=0 ; k<num ; k++) wlScaledList.push_back(wlProjList.interpolate((double)k*step));
} else { //CURVE_MODE_PLANE
assert(curve_type == HatchingGroup::CURVE_MODE_PLANE);
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed::add() - Resampling curve.");
//Resample to even spacing in world space. This curve will
//be sampled on the order of the mesh spacing but we'll
//not allow the num of samples to drop too low in case
//the gesture's on the scale of one triangle
size_t num = max(wlClipList.size(), 5UL);
double step = 1.0/((double)(num-1));
for (k=0 ; k<num ; k++) wlScaledList.push_back(wlClipList.interpolate((double)k*step));
}
// Convert back to 2D
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed:add() - converting to 2D.");
NDCZpt_list ndczlScaledList;
for (k=0;k<wlScaledList.size();k++) ndczlScaledList.push_back(NDCZpt(_patch->xform()*wlScaledList[k]));
ndczlScaledList.update_length();
// Calculate pixel length of hatch
double pix_len = ndczlScaledList.length() * VIEW::peek()->ndc2pix_scale();
if (pix_len < 8.0)
{
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Stroke only %f pixels. Probably an accident. Punting...", pix_len);
return false;
}
vector<HatchingFixedVertex> verts;
Wpt_list pts;
vector<Wvec> norms;
err_mesg_cond(debug, ERR_LEV_SPAM, "HatchingGroupFixed::add() - Final sampling.");
for (k=0; k<ndczlScaledList.size(); k++) {
Wpt wloc;
f = HatchingGroupBase::find_face_vis(NDCpt(ndczlScaledList[k]),wloc);
if (f && f->patch() == _patch && f->front_facing()) {
Wvec bc;
Wvec norm;
//f->project_barycentric(wloc,bc);
f->project_barycentric_ndc(NDCpt(ndczlScaledList[k]),bc);
Wvec bc_old = bc;
Bsimplex::clamp_barycentric(bc);
double dL = fabs(bc.length() - bc_old.length());
if (bc != bc_old) {
err_mesg(ERR_LEV_INFO,
"HatchingGroupFixed::add() - Baycentric clamp modified result: (%f,%f,%f) --> (%f,%f,%f) Length Change: %f",
bc_old[0], bc_old[1], bc_old[2], bc[0], bc[1], bc[2], dL);
}
if (dL < 1e-3) {
verts.push_back(HatchingFixedVertex(f->index(), bc));
f->bc2norm_blend(bc,norm);
pts.push_back(wloc);
norms.push_back(norm);
} else {
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Change too large due to error in projection. Dumping point...");
}
} else {
if (!f)
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Missed in final lookup: No hit on a mesh!");
else if (!(f->patch() == _patch))
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Missed in final lookup: Hit wrong patch.");
else if (!(f->front_facing()))
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Missed in final lookup: Hit backfracing tri.");
else
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed::add() - Missed in final lookup: WHAT?!?!?!?!");
}
}
if (pts.size()>1) {
//XXX - Okay, using the gesture pressure, but no offsets.
//Need to go back and add offset generation...
BaseStrokeOffsetLISTptr ol = make_shared<BaseStrokeOffsetLIST>();
ol->set_replicate(0);
ol->set_hangover(1);
ol->set_pix_len(pix_len);
ol->push_back(BaseStrokeOffset(0.0, 0.0, finalprl[0], BaseStrokeOffset::OFFSET_TYPE_BEGIN));
for (k=1; k<finalprl.size(); k++)
ol->push_back(BaseStrokeOffset((double)k / (double)(finalprl.size()-1), 0.0, finalprl[k],
BaseStrokeOffset::OFFSET_TYPE_MIDDLE));
ol->push_back(BaseStrokeOffset(1.0, 0.0, finalprl[finalprl.size()-1], BaseStrokeOffset::OFFSET_TYPE_END));
if (base_level(num_base_levels()-1)->pix_size() > 0) {
assert(_params.anim_style() != HatchingGroup::STYLE_MODE_NEAT);
add_base_level();
// Make sure we can see it whil we're editing!
base_level(num_base_levels()-1)->set_desired_frac(1.0);
}
base_level(num_base_levels()-1)->add_hatch(
new HatchingHatchFixed(
base_level(num_base_levels()-1),_patch->mesh()->pix_size(),verts,pts,norms,ol) );
return true;
} else {
err_mesg(ERR_LEV_WARN, "HatchingGroupFixed:add() - All lookups are bad. Punting...");
return false;
}
return true;
}
