1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
use crate::*;
// Make Edge-Vertex-Vertex-Loop-Face-Shell
/// Operator corresponding to MEVVLS in SNUMOD.
///
/// See [`Dcel::mevvlfs`] for details.
pub struct Mevvlfs<'brand, 'arena, V> {
pub body: ptr!(Body),
pub data: [V; 2],
}
impl<'brand, 'arena, V> Mevvlfs<'brand, 'arena, V> {
pub fn new(body: ptr!(Body), data: [V; 2]) -> Self {
Self { body, data }
}
}
impl<'brand, 'arena, V> Operator<'brand, 'arena, V> for Mevvlfs<'brand, 'arena, V> {
type Inverse = Kevvlfs<'brand, 'arena, V>;
type Error = Infallible;
type Check = ();
fn check(&self, _dcel: &Dcel<'brand, 'arena, V>) -> Result<Self::Check, Self::Error> {
Ok(())
}
fn apply(
self,
dcel: &mut Dcel<'brand, 'arena, V>,
) -> Result<Self::Inverse, OperatorErr<Self, Self::Error>> {
try_check!(self, dcel);
let Mevvlfs {
body,
data: [d1, d2],
} = self;
let shell = body.add_new_shell(dcel);
let face = shell.add_new_face(dcel);
let (edge, [a, b]) = Edge::create(*shell, dcel);
let loop_ = Loop::new(dcel);
let v1 = shell.add_new_vertex(d1, dcel);
let v2 = shell.add_new_vertex(d2, dcel);
loop_.set_face(*face, dcel);
face.set_outer_loop(*loop_, dcel);
a.update_origin(*v1, dcel);
b.update_origin(*v2, dcel);
loop_.add_half_edge(a, dcel);
loop_.add_half_edge(b, dcel);
Ok(Kevvlfs {
edge,
vertices: [v1, v2],
loop_,
face,
shell,
})
}
}
/// Operator corresponding to KEVVLS in SNUMOD.
///
/// See [`Dcel::kevvlfs`] for details.
pub struct Kevvlfs<'brand, 'arena, V> {
pub edge: own!(Edge),
pub vertices: [own!(Vertex); 2],
pub loop_: own!(Loop),
pub face: own!(Face),
pub shell: own!(Shell),
}
/// Precondition Error for [`Kevvlfs`].
#[derive(Debug, Error)]
pub enum KevvlfsError {
#[error("edge vertices do not equal vertices")]
EdgeVerticesMismatch,
#[error("half_edge loop does not equal loop")]
HalfEdgeLoopMismatch,
#[error("loop is not cycle between half edges")]
InvalidLoop,
#[error("face outer loop does not match loop")]
FaceOuterLoopMismatch,
#[error("face has inner loops")]
FaceHasInnerLoops,
#[error("shell has more than one face")]
ShellHasMoreThanOneFace,
#[error("shell face does not match face")]
ShellFaceMismatch,
}
impl<'brand, 'arena, V> Kevvlfs<'brand, 'arena, V> {
pub fn new(
edge: own!(Edge),
vertices: [own!(Vertex); 2],
loop_: own!(Loop),
face: own!(Face),
shell: own!(Shell),
) -> Self {
Self {
edge,
vertices,
loop_,
face,
shell,
}
}
}
impl<'brand, 'arena, V> Operator<'brand, 'arena, V> for Kevvlfs<'brand, 'arena, V> {
type Inverse = Mevvlfs<'brand, 'arena, V>;
type Error = KevvlfsError;
type Check = ();
fn check(&self, dcel: &Dcel<'brand, 'arena, V>) -> Result<Self::Check, Self::Error> {
let Kevvlfs {
edge,
vertices: [v1, v2],
loop_,
face,
shell,
} = self;
mklens!(dcel, edge, loop_, face, shell, v1, v2);
let [a, b] = edge.half_edges();
let edge_verts = edge.vertices();
or_err(
edge_verts == [v1, v2] || edge_verts == [v2, v1],
KevvlfsError::EdgeVerticesMismatch,
)?;
or_err(a.loop_() == loop_, KevvlfsError::HalfEdgeLoopMismatch)?;
or_err(a.next() == b, KevvlfsError::InvalidLoop)?;
or_err(b.next() == a, KevvlfsError::InvalidLoop)?;
or_err(
face.outer_loop() == loop_,
KevvlfsError::FaceOuterLoopMismatch,
)?;
or_err(
face.maybe_inner_loops().is_none(),
KevvlfsError::FaceHasInnerLoops,
)?;
or_err(face.next() == face, KevvlfsError::ShellHasMoreThanOneFace)?;
or_err(shell.faces() == face, KevvlfsError::ShellFaceMismatch)?;
Ok(())
}
fn apply(
self,
dcel: &mut Dcel<'brand, 'arena, V>,
) -> Result<Self::Inverse, OperatorErr<Self, Self::Error>> {
try_check!(self, dcel);
let Kevvlfs {
edge,
vertices,
loop_,
face,
shell,
} = self;
let body = shell.body(dcel);
body.remove_shell(*shell, dcel);
edge.destroy(dcel);
loop_.free(dcel);
face.free(dcel);
shell.free(dcel);
Ok(Mevvlfs {
body,
data: vertices.map(|v| v.destroy(dcel)),
})
}
}
|
