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%%
%% wpc_corner.erl --
%%
%% Add corners to edges bordered by a tri and a pentagon or a combination
%% of such faces with any number of quads in between.
%%
%% Copyright (c) 2010-2011 Richard Jones.
%%
%% See the file "license.terms" for information on usage and redistribution
%% of this file, and for a DISCLAIMER OF ALL WARRANTIES.
%%
-module(wpc_corner).
-export([init/0,menu/2,command/2]).
-include("wings.hrl").
init() ->
true.
%% Menu
menu({edge}, Menu) ->
lists:reverse(parse(Menu, [], false));
menu(_,Menu) ->
Menu.
parse([], NewMenu, true) ->
NewMenu;
parse([], NewMenu, false) ->
[corner_menu(), separator|NewMenu];
parse([A = {_,connect,_}|Rest], NewMenu, false) ->
parse(Rest, [A,corner_menu()|NewMenu], true);
parse([Elem|Rest], NewMenu, Found) ->
parse(Rest, [Elem|NewMenu], Found).
corner_menu() ->
{?__(1,"Corner"),corner,
?__(2,"Make corners from edge rings capped by a 3 and 5 sided face")}.
%% Command
command({edge,corner}, St) ->
corner(St);
command(_, _) ->
next.
%% Process Command
corner(St0) ->
{St1,{Tvs,Sel}} = wings_sel:mapfold(fun(Edges, #we{id=Id}=We0, {Tvs0,Acc0}) ->
CornerEdges = corner_edges(Edges, Edges, We0, []),
{Vs,VD,We,EdgeSel} = lists:foldl(fun
([H|_]=D, Acc) when is_list(D) ->
MD = lists:max(D),
Data = if MD =:= H -> D;
true -> lists:reverse(D)
end,
% io:format("Data ~p\n",[Data]),
complex_corner_0(Data, Acc);
({Edge,Face,CV,Va}, {VList,VD0,We1,EsAcc}) ->
{We2,NewVertex} = wings_edge:cut(Edge, 2, We1),
[NewEdge] = wings_we:new_items_as_ordset(edge, We1, We2),
{VData,We3} = connect_five_sided(NewVertex, CV, Va, Face, We2),
NewEs = gb_sets:add(NewEdge, EsAcc),
{[NewVertex|VList],[VData|VD0],We3,NewEs}
end, {[],[],We0,Edges}, CornerEdges),
EsVs = wings_edge:to_vertices(Edges, We) -- Vs,
EsVpos = wings_util:add_vpos(EsVs, We),
AllVs = Vs ++ EsVs,
Tvs1 = [{Id,{AllVs,corner_tension_fun(VD++EsVpos)}}|Tvs0],
{We,{Tvs1,[{Id,EdgeSel}|Acc0]}}
end, {[],[]}, St0),
if St0 =:= St1 ->
wings_u:error_msg(?__(1,"You can only add corners to edges that have a 3 sided\nface on one end, and a 5 sided face on the other."));
true ->
St = wings_sel:set(Sel, St1),
wings_drag:setup(Tvs, [angle], wings_sel:valid_sel(St))
end.
corner_edges(Edges0, AllEs, #we{es=Etab}=We, Acc0) ->
case gb_sets:is_empty(Edges0) of
true ->
Acc0;
false ->
{Edge,Edges} = gb_sets:take_smallest(Edges0),
#edge{vs=Va,lf=Lf,rf=Rf} = array:get(Edge, Etab),
LeftVs = wings_face:vertices_ccw(Lf, Edge, We),
RightVs = wings_face:vertices_ccw(Rf, Edge, We),
case length(LeftVs) of
3 ->
case length(RightVs) of
5 ->
% io:format("~p\n",[okay1]),
CV = lists:nth(3, RightVs),
corner_edges(Edges, AllEs, We, [{Edge,Rf,CV,Va}|Acc0]);
4 ->
% io:format("~p\n",[okay2]),
find(5, Edge, Rf, [{Edge,Rf,Va}], Edges, AllEs, We, Acc0);
_ -> corner_edges(Edges, AllEs, We, Acc0)
end;
5 ->
case length(RightVs) of
3 ->
% io:format("~p\n",[okay3]),
CV = lists:nth(3, LeftVs),
corner_edges(Edges, AllEs, We, [{Edge,Lf,CV,Va}|Acc0]);
4 ->
% io:format("~p\n",[okay4]),
CV = lists:nth(3, LeftVs),
find(3, Edge, Rf, [{Edge,Lf,CV,Va}], Edges, AllEs, We, Acc0);
_ -> corner_edges(Edges, AllEs, We, Acc0)
end;
4 ->
case length(RightVs) of
3 ->
% io:format("~p\n",[okay5]),
find(5, Edge, Lf, [{Edge,Lf,Va}], Edges, AllEs, We, Acc0);
5 ->
% io:format("~p\n",[okay6]),
CV = lists:nth(3, RightVs),
find(3, Edge, Lf, [{Edge,Rf,CV,Va}], Edges, AllEs, We, Acc0);
_ -> corner_edges(Edges, AllEs, We, Acc0)
end;
_ ->
corner_edges(Edges, AllEs, We, Acc0)
end
end.
find(N, Edge, Face, E2Cut, Edges0, AllEs, #we{es=Etab}=We, Acc0) ->
Itr0 = wings_face:iterator(Face, We),
Itr1 = wings_face:skip_to_edge(Edge, Itr0),
{_,_,_,Itr2} = wings_face:next_ccw(Itr1),
{_,_,_,Itr3} = wings_face:next_ccw(Itr2),
{_,E,_,_} = wings_face:next_ccw(Itr3),
case gb_sets:is_member(E, AllEs) of
true ->
#edge{vs=Va,lf=Lf,rf=Rf} = array:get(E, Etab),
case Face of
Lf ->
RightVs = wings_face:vertices_ccw(Rf, E, We),
case length(RightVs) of
5 when N =:= 5 ->
% io:format("~p\n",[okay7]),
CV = lists:nth(3, RightVs),
Edges = gb_sets:delete(E, Edges0),
corner_edges(Edges, AllEs, We, [[{E,Rf,CV,Va}|E2Cut]|Acc0]);
3 when N =:= 3 ->
% io:format("~p\n",[okay8]),
Edges = gb_sets:delete(E, Edges0),
corner_edges(Edges, AllEs, We, [[{E,Lf,Va}|E2Cut]|Acc0]);
4 when N =:= 5 ->
% io:format("~p\n",[okay9]),
find(N, E, Rf, [{E,Rf,Va}|E2Cut], Edges0, AllEs, We, Acc0);
4 when N =:= 3 ->
% io:format("~p\n",[okay10]),
find(N, E, Rf, [{E,Lf,Va}|E2Cut], Edges0, AllEs, We, Acc0);
_ ->
corner_edges(Edges0, AllEs, We, Acc0)
end;
Rf ->
LeftVs = wings_face:vertices_ccw(Lf, E, We),
case length(LeftVs) of
5 when N =:= 5 ->
% io:format("~p\n",[okay11]),
CV = lists:nth(3, LeftVs),
Edges = gb_sets:delete(E, Edges0),
corner_edges(Edges, AllEs, We, [[{E,Lf,CV,Va}|E2Cut]|Acc0]);
3 when N =:= 3 ->
% io:format("~p\n",[okay12]),
Edges = gb_sets:delete(E, Edges0),
corner_edges(Edges, AllEs, We, [[{E,Rf,Va}|E2Cut]|Acc0]);
4 when N =:= 5 ->
% io:format("~p\n",[okay13]),
find(N, E, Lf, [{E,Lf,Va}|E2Cut], Edges0, AllEs, We, Acc0);
4 when N =:= 3 ->
% io:format("~p\n",[okay14]),
find(N, E, Lf, [{E,Rf,Va}|E2Cut], Edges0, AllEs, We, Acc0);
_ ->
corner_edges(Edges0, AllEs, We, Acc0)
end
end;
false ->
corner_edges(Edges0, AllEs, We, Acc0)
end.
complex_corner_0([{Edge,Face,CV,Va}|Data], {VList,VD,We0,NewEs0}) ->
{We1,NewVertex} = wings_edge:cut(Edge, 2, We0),
[NewEdge] = wings_we:new_items_as_ordset(edge, We0, We1),
{VData,We} = connect_five_sided(NewVertex, CV, Va, Face, We1),
NewEs = gb_sets:add(NewEdge, NewEs0),
complex_corner_1(Data, NewVertex, {[NewVertex|VList],[VData|VD],We,NewEs}).
complex_corner_1([{Edge,Face,Va}|Data], Vb, {VList,VD,We0,NewEs0}) ->
{We1,NewVertex} = wings_edge:cut(Edge, 2, We0),
[NewEdge] = wings_we:new_items_as_ordset(edge, We0, We1),
{VData,We} = connect_five_sided(NewVertex, Vb, Va, Face, We1),
NewEs = gb_sets:add(NewEdge, NewEs0),
complex_corner_1(Data, NewVertex, {[NewVertex|VList],[VData|VD],We,NewEs});
complex_corner_1([], _, Acc) ->
Acc.
connect_five_sided(NewVertex, CV, Va, Face, We0) ->
Vs = wings_face:to_vertices([Face], We0),
Vsp = ordsets:from_list([Va,NewVertex,CV]),
case ordsets:is_subset(Vsp, ordsets:from_list(Vs)) of
true ->
case catch wings_vertex:force_connect(NewVertex, CV, Face, We0) of
{#we{vp=Vtab}=We,_} ->
P0 = array:get(NewVertex, Vtab),
P1 = array:get(CV, Vtab),
P2 = array:get(Va, Vtab),
Rad = e3d_vec:dist(P0, P2),
Vec = e3d_vec:norm_sub(P1, P0),
{{NewVertex,P0,Rad,Vec},We};
_Error ->
corner_error()
end;
false ->
corner_error()
end.
corner_error() ->
wings_u:error_msg(?__(1,"Sorry, that selection goes beyond the scope of this tool.")).
corner_tension_fun(VD) ->
fun
([0.0], A) ->
lists:foldl(fun
({V,Vpos,_Rad,_Vec}, VsAcc) ->
[{V,Vpos}|VsAcc];
(VPos, VsAcc) ->
[VPos|VsAcc]
end, A, VD);
([Angle], A) ->
lists:foldl(fun
({V,Vpos,Rad,Vec}, VsAcc) ->
%% Erlang trigonomic inputs have to be converted from Degrees to Radians
Radians = (math:pi()/(360.0/Angle)),
Dist = math:tan(Radians) * Rad,
Pos = e3d_vec:add_prod(Vpos, Vec, Dist),
[{V,Pos}|VsAcc];
(VPos, VsAcc) ->
[VPos|VsAcc]
end, A, VD)
end.
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