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Diffstat (limited to 'lib/dialyzer/test/opaque_SUITE_data/src/wings/wings_we.erl')
| -rw-r--r-- | lib/dialyzer/test/opaque_SUITE_data/src/wings/wings_we.erl | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/lib/dialyzer/test/opaque_SUITE_data/src/wings/wings_we.erl b/lib/dialyzer/test/opaque_SUITE_data/src/wings/wings_we.erl new file mode 100644 index 0000000000..6a93363445 --- /dev/null +++ b/lib/dialyzer/test/opaque_SUITE_data/src/wings/wings_we.erl @@ -0,0 +1,250 @@ +%% +%% wings_we.erl -- +%% +%% This module contains functions to build and manipulate +%% we records (winged-edged records, the central data structure +%% in Wings 3D). + +-module(wings_we). + +-export([rebuild/1, is_consistent/1, is_face_consistent/2, new_id/1, + new_items_as_ordset/3, validate_mirror/1, visible/1, visible_edges/1]). + +-include("wings.hrl"). + +%%% +%%% API. +%%% + +validate_mirror(#we{mirror=none}=We) -> We; +validate_mirror(#we{fs=Ftab,mirror=Face}=We) -> + case gb_trees:is_defined(Face, Ftab) of + false -> We#we{mirror=none}; + true -> We + end. + +%% rebuild(We) -> We' +%% Rebuild any missing 'vc' and 'fs' tables. If there are +%% fewer elements in the 'vc' table than in the 'vp' table, +%% remove redundant entries in the 'vp' table. Updated id +%% bounds. +rebuild(#we{vc=undefined,fs=undefined,es=Etab0}=We0) -> + Etab = gb_trees:to_list(Etab0), + Ftab = rebuild_ftab(Etab), + VctList = rebuild_vct(Etab), + We = We0#we{vc=gb_trees:from_orddict(VctList),fs=Ftab}, + rebuild_1(VctList, We); +rebuild(#we{vc=undefined,es=Etab}=We) -> + VctList = rebuild_vct(gb_trees:to_list(Etab), []), + rebuild_1(VctList, We#we{vc=gb_trees:from_orddict(VctList)}); +rebuild(#we{fs=undefined,es=Etab}=We) -> + Ftab = rebuild_ftab(gb_trees:to_list(Etab)), + rebuild(We#we{fs=Ftab}); +rebuild(We) -> update_id_bounds(We). + +%%% Utilities for allocating IDs. + +new_id(#we{next_id=Id}=We) -> + {Id,We#we{next_id=Id+1}}. + +%%% Returns sets of newly created items. + +new_items_as_ordset(vertex, #we{next_id=Wid}, #we{next_id=NewWid,vp=Tab}) -> + new_items_as_ordset_1(Tab, Wid, NewWid); +new_items_as_ordset(edge, #we{next_id=Wid}, #we{next_id=NewWid,es=Tab}) -> + new_items_as_ordset_1(Tab, Wid, NewWid); +new_items_as_ordset(face, #we{next_id=Wid}, #we{next_id=NewWid,fs=Tab}) -> + new_items_as_ordset_1(Tab, Wid, NewWid). + +any_hidden(#we{fs=Ftab}) -> + not gb_trees:is_empty(Ftab) andalso + wings_util:gb_trees_smallest_key(Ftab) < 0. + +%%% +%%% Local functions. +%%% + +rebuild_1(VctList, #we{vc=Vct,vp=Vtab0}=We) -> + case {gb_trees:size(Vct),gb_trees:size(Vtab0)} of + {Same,Same} -> rebuild(We); + {Sz1,Sz2} when Sz1 < Sz2 -> + Vtab = vertex_gc_1(VctList, gb_trees:to_list(Vtab0), []), + rebuild(We#we{vp=Vtab}) + end. + +rebuild_vct(Es) -> + rebuild_vct(Es, []). + +rebuild_vct([{Edge,#edge{vs=Va,ve=Vb}}|Es], Acc0) -> + Acc = rebuild_maybe_add(Va, Vb, Edge, Acc0), + rebuild_vct(Es, Acc); +rebuild_vct([], VtoE) -> + build_incident_tab(VtoE). + +rebuild_ftab(Es) -> + rebuild_ftab_1(Es, []). + +rebuild_ftab_1([{Edge,#edge{lf=Lf,rf=Rf}}|Es], Acc0) -> + Acc = rebuild_maybe_add(Lf, Rf, Edge, Acc0), + rebuild_ftab_1(Es, Acc); +rebuild_ftab_1([], FtoE) -> + gb_trees:from_orddict(build_incident_tab(FtoE)). + +rebuild_maybe_add(Ka, Kb, E, [_,{Ka,_}|_]=Acc) -> + [{Kb,E}|Acc]; +rebuild_maybe_add(Ka, Kb, E, [_,{Kb,_}|_]=Acc) -> + [{Ka,E}|Acc]; +rebuild_maybe_add(Ka, Kb, E, [{Ka,_}|_]=Acc) -> + [{Kb,E}|Acc]; +rebuild_maybe_add(Ka, Kb, E, [{Kb,_}|_]=Acc) -> + [{Ka,E}|Acc]; +rebuild_maybe_add(Ka, Kb, E, Acc) -> + [{Ka,E},{Kb,E}|Acc]. + +vertex_gc_1([{V,_}|Vct], [{V,_}=Vtx|Vpos], Acc) -> + vertex_gc_1(Vct, Vpos, [Vtx|Acc]); +vertex_gc_1([_|_]=Vct, [_|Vpos], Acc) -> + vertex_gc_1(Vct, Vpos, Acc); +vertex_gc_1([], _, Acc) -> + gb_trees:from_orddict(lists:reverse(Acc)). + +%%% +%%% Handling of hidden faces. +%%% + +visible(#we{mirror=none,fs=Ftab}) -> + visible_2(gb_trees:keys(Ftab)); +visible(#we{mirror=Face,fs=Ftab}) -> + visible_2(gb_trees:keys(gb_trees:delete(Face, Ftab))). + +visible_2([F|Fs]) when F < 0 -> visible_2(Fs); +visible_2(Fs) -> Fs. + +visible_edges(#we{es=Etab,mirror=Face}=We) -> + case any_hidden(We) of + false -> gb_trees:keys(Etab); + true -> visible_es_1(gb_trees:to_list(Etab), Face, []) + end. + +visible_es_1([{E,#edge{lf=Lf,rf=Rf}}|Es], Face, Acc) -> + if + Lf < 0 -> + %% Left face hidden. + if + Rf < 0; Rf =:= Face -> + %% Both faces invisible (in some way). + visible_es_1(Es, Face, Acc); + true -> + %% Right face is visible. + visible_es_1(Es, Face, [E|Acc]) + end; + Lf =:= Face, Rf < 0 -> + %% Left face mirror, right face hidden. + visible_es_1(Es, Face, Acc); + true -> + %% At least one face visible. + visible_es_1(Es, Face, [E|Acc]) + end; +visible_es_1([], _, Acc) -> ordsets:from_list(Acc). + +update_id_bounds(#we{vp=Vtab,es=Etab,fs=Ftab}=We) -> + case gb_trees:is_empty(Etab) of + true -> We#we{next_id=0}; + false -> + LastId = lists:max([wings_util:gb_trees_largest_key(Vtab), + wings_util:gb_trees_largest_key(Etab), + wings_util:gb_trees_largest_key(Ftab)]), + We#we{next_id=LastId+1} + end. + +%% build_incident_tab([{Elem,Edge}]) -> [{Elem,Edge}] +%% Elem = Face or Vertex +%% Build the table of incident edges for either faces or vertices. +%% Returns an ordered list where each Elem is unique. + +build_incident_tab(ElemToEdgeRel) -> + T = ets:new(?MODULE, [ordered_set]), + ets:insert(T, ElemToEdgeRel), + R = ets:tab2list(T), + ets:delete(T), + R. + +%%% +%%% Calculate normals. +%%% + +new_items_as_ordset_1(Tab, Wid, NewWid) when NewWid-Wid < 32 -> + new_items_as_ordset_2(Wid, NewWid, Tab, []); +new_items_as_ordset_1(Tab, Wid, _NewWid) -> + [Item || Item <- gb_trees:keys(Tab), Item >= Wid]. + +new_items_as_ordset_2(Wid, NewWid, Tab, Acc) when Wid < NewWid -> + case gb_trees:is_defined(Wid, Tab) of + true -> new_items_as_ordset_2(Wid+1, NewWid, Tab, [Wid|Acc]); + false -> new_items_as_ordset_2(Wid+1, NewWid, Tab, Acc) + end; +new_items_as_ordset_2(_Wid, _NewWid, _Tab, Acc) -> lists:reverse(Acc). + +%%% +%%% Test the consistency of a #we{}. +%%% + +is_consistent(#we{}=We) -> + try + validate_vertex_tab(We), + validate_faces(We) + catch error:_ -> false + end. + +is_face_consistent(Face, #we{fs=Ftab,es=Etab}) -> + Edge = gb_trees:get(Face, Ftab), + try validate_face(Face, Edge, Etab) + catch error:_ -> false + end. + +validate_faces(#we{fs=Ftab,es=Etab}) -> + validate_faces_1(gb_trees:to_list(Ftab), Etab). + +validate_faces_1([{Face,Edge}|Fs], Etab) -> + validate_face(Face, Edge, Etab), + validate_faces_1(Fs, Etab); +validate_faces_1([], _) -> true. + +validate_face(Face, Edge, Etab) -> + Ccw = walk_face_ccw(Edge, Etab, Face, Edge, []), + Edge = walk_face_cw(Edge, Etab, Face, Ccw), + [V|Vs] = lists:sort(Ccw), + validate_face_vertices(Vs, V). + +validate_face_vertices([V|_], V) -> + erlang:error(repeated_vertex); +validate_face_vertices([_], _) -> + true; +validate_face_vertices([V|Vs], _) -> + validate_face_vertices(Vs, V). + +walk_face_ccw(LastEdge, _, _, LastEdge, [_|_]=Acc) -> Acc; +walk_face_ccw(Edge, Etab, Face, LastEdge, Acc) -> + case gb_trees:get(Edge, Etab) of + #edge{ve=V,lf=Face,ltpr=Next} -> + walk_face_ccw(Next, Etab, Face, LastEdge, [V|Acc]); + #edge{vs=V,rf=Face,rtpr=Next} -> + walk_face_ccw(Next, Etab, Face, LastEdge, [V|Acc]) + end. + +walk_face_cw(Edge, _, _, []) -> Edge; +walk_face_cw(Edge, Etab, Face, [V|Vs]) -> + case gb_trees:get(Edge, Etab) of + #edge{vs=V,lf=Face,ltsu=Next} -> + walk_face_cw(Next, Etab, Face, Vs); + #edge{ve=V,rf=Face,rtsu=Next} -> + walk_face_cw(Next, Etab, Face, Vs) + end. + +validate_vertex_tab(#we{es=Etab,vc=Vct}) -> + lists:foreach(fun({V,Edge}) -> + case gb_trees:get(Edge, Etab) of + #edge{vs=V} -> ok; + #edge{ve=V} -> ok + end + end, gb_trees:to_list(Vct)). |