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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
//! Parametric hot-rolled steel section profiles (L / U / T / C / Z). Split out of
//! `shapes.rs` to keep both files under the module-size ratchet.
use super::outline::{fillet_outline, push_arc};
use super::ProfileProcessor;
use crate::profile::Profile2D;
use crate::{Error, Point2, Result};
use ifc_lite_core::DecodedEntity;
/// Reject a non-finite or non-positive required profile dimension
/// (`IfcPositiveLengthMeasure`). A negative value both makes a fillet-radius
/// `clamp` bound negative (panicking `f64::clamp`) and yields mirrored/garbage
/// geometry, so returning `Err` skips the one element, mirroring the existing
/// missing-attribute errors. The finite check is what rejects `NaN` (`NaN <= 0.0`
/// is `false`).
fn require_positive(value: f64, what: &str) -> Result<()> {
if value.is_finite() && value > 0.0 {
Ok(())
} else {
Err(Error::geometry(format!(
"{what} must be a positive length, got {value}"
)))
}
}
impl ProfileProcessor {
/// Process L-shape profile (angle)
/// IfcLShapeProfileDef: ProfileType, ProfileName, Position, Depth, Width, Thickness, ...
pub(super) fn process_l_shape(&self, profile: &DecodedEntity) -> Result<Profile2D> {
// IfcLShapeProfileDef: Depth(3), Width(4), Thickness(5), FilletRadius(6),
// EdgeRadius(7), LegSlope(8). Built corner-at-origin (heel at (0,0),
// horizontal leg along +X, vertical leg along +Y); `center_on_bbox`
// re-centres it. LegSlope (tapered legs) is rare and not modelled.
let depth = profile
.get_float(3)
.ok_or_else(|| Error::geometry("L-Shape missing Depth".to_string()))?;
let width = profile
.get_float(4)
.ok_or_else(|| Error::geometry("L-Shape missing Width".to_string()))?;
let t = profile
.get_float(5)
.ok_or_else(|| Error::geometry("L-Shape missing Thickness".to_string()))?;
require_positive(depth, "L-Shape Depth")?;
require_positive(width, "L-Shape Width")?;
require_positive(t, "L-Shape Thickness")?;
// FilletRadius rounds the inner re-entrant corner (concave, adds
// material); EdgeRadius rounds the two leg toes (convex, removes the
// sharp tips). Both optional; clamp so the arcs stay inside the legs.
let rf = profile
.get_float(6)
.unwrap_or(0.0)
.clamp(0.0, (width - t).min(depth - t).max(0.0));
let re = profile.get_float(7).unwrap_or(0.0).clamp(0.0, (t * 0.999).max(0.0));
// Root-fillet segments per corner: 6 at Medium+, coarser below.
let seg = self.quality().profile_arc_segments(6, 2);
let half_pi = std::f64::consts::FRAC_PI_2;
let pi = std::f64::consts::PI;
// Counter-clockwise from the heel.
let mut p: Vec<Point2<f64>> = Vec::new();
p.push(Point2::new(0.0, 0.0)); // heel (outer corner) — sharp
p.push(Point2::new(width, 0.0)); // horizontal leg outer end — sharp
// horizontal leg toe (width, t): convex EdgeRadius
if re > 1.0e-9 {
push_arc(&mut p, width - re, t - re, re, 0.0, half_pi, seg);
} else {
p.push(Point2::new(width, t));
}
// inner re-entrant corner (t, t): concave FilletRadius
if rf > 1.0e-9 {
push_arc(&mut p, t + rf, t + rf, rf, 1.5 * pi, pi, seg);
} else {
p.push(Point2::new(t, t));
}
// vertical leg toe (t, depth): convex EdgeRadius
if re > 1.0e-9 {
push_arc(&mut p, t - re, depth - re, re, 0.0, half_pi, seg);
} else {
p.push(Point2::new(t, depth));
}
p.push(Point2::new(0.0, depth)); // vertical leg outer end — sharp
Ok(Profile2D::new(p))
}
/// Process U-shape profile (channel)
/// IfcUShapeProfileDef: ProfileType, ProfileName, Position, Depth, FlangeWidth, WebThickness, FlangeThickness, ...
pub(super) fn process_u_shape(&self, profile: &DecodedEntity) -> Result<Profile2D> {
let depth = profile
.get_float(3)
.ok_or_else(|| Error::geometry("U-Shape missing Depth".to_string()))?;
let flange_width = profile
.get_float(4)
.ok_or_else(|| Error::geometry("U-Shape missing FlangeWidth".to_string()))?;
let web_thickness = profile
.get_float(5)
.ok_or_else(|| Error::geometry("U-Shape missing WebThickness".to_string()))?;
let flange_thickness = profile
.get_float(6)
.ok_or_else(|| Error::geometry("U-Shape missing FlangeThickness".to_string()))?;
require_positive(depth, "U-Shape Depth")?;
require_positive(flange_width, "U-Shape FlangeWidth")?;
require_positive(web_thickness, "U-Shape WebThickness")?;
require_positive(flange_thickness, "U-Shape FlangeThickness")?;
// FilletRadius (attr 7) rounds the two inner web↔flange junctions
// (concave); EdgeRadius (attr 8) rounds the two flange toes (convex).
// FlangeSlope (9) not modelled.
let half_depth = depth / 2.0;
let ft = flange_thickness;
let rf = profile
.get_float(7)
.unwrap_or(0.0)
.clamp(0.0, (flange_width - web_thickness).min(half_depth - ft).max(0.0));
let re = profile.get_float(8).unwrap_or(0.0).clamp(0.0, (ft * 0.999).max(0.0));
// Sharp outline (counter-clockwise). 2,5 = flange toes; 3,4 = junctions.
let sharp = [
Point2::new(0.0, -half_depth), // 0 back-bottom outer
Point2::new(flange_width, -half_depth), // 1 bottom toe outer
Point2::new(flange_width, -half_depth + ft), // 2 bottom toe inner (edge)
Point2::new(web_thickness, -half_depth + ft), // 3 bottom junction (fillet)
Point2::new(web_thickness, half_depth - ft), // 4 top junction (fillet)
Point2::new(flange_width, half_depth - ft), // 5 top toe inner (edge)
Point2::new(flange_width, half_depth), // 6 top toe outer
Point2::new(0.0, half_depth), // 7 back-top outer
];
// Root-fillet segments per corner: 6 at Medium+, coarser below.
let seg = self.quality().profile_arc_segments(6, 2);
let radii = [(2, re), (3, rf), (4, rf), (5, re)];
Ok(Profile2D::new(fillet_outline(&sharp, &radii, seg)))
}
/// Process T-shape profile
/// IfcTShapeProfileDef: ProfileType, ProfileName, Position, Depth, FlangeWidth, WebThickness, FlangeThickness, ...
pub(super) fn process_t_shape(&self, profile: &DecodedEntity) -> Result<Profile2D> {
let depth = profile
.get_float(3)
.ok_or_else(|| Error::geometry("T-Shape missing Depth".to_string()))?;
let flange_width = profile
.get_float(4)
.ok_or_else(|| Error::geometry("T-Shape missing FlangeWidth".to_string()))?;
let web_thickness = profile
.get_float(5)
.ok_or_else(|| Error::geometry("T-Shape missing WebThickness".to_string()))?;
let flange_thickness = profile
.get_float(6)
.ok_or_else(|| Error::geometry("T-Shape missing FlangeThickness".to_string()))?;
require_positive(depth, "T-Shape Depth")?;
require_positive(flange_width, "T-Shape FlangeWidth")?;
require_positive(web_thickness, "T-Shape WebThickness")?;
require_positive(flange_thickness, "T-Shape FlangeThickness")?;
// FilletRadius (attr 7) rounds the two web↔flange junctions (concave);
// FlangeEdgeRadius (8) rounds the flange toes; WebEdgeRadius (9) rounds
// the web's free end. Flange/Web slopes (10/11) not modelled.
let half_flange = flange_width / 2.0;
let half_web = web_thickness / 2.0;
let ft = flange_thickness;
let ftf = depth - ft; // flange inner face Y
let rf = profile
.get_float(7)
.unwrap_or(0.0)
.clamp(0.0, (half_flange - half_web).min(ftf).max(0.0));
let r_fl = profile.get_float(8).unwrap_or(0.0).clamp(0.0, (ft * 0.999).max(0.0));
let r_web = profile.get_float(9).unwrap_or(0.0).clamp(0.0, (half_web * 0.999).max(0.0));
// Sharp outline (counter-clockwise). 1,6 = junctions; 2,5 = flange toes;
// 0,7 = web free-end corners.
let sharp = [
Point2::new(-half_web, 0.0), // 0 web bottom-left (web edge)
Point2::new(-half_web, ftf), // 1 left junction (fillet)
Point2::new(-half_flange, ftf), // 2 flange left toe inner (flange edge)
Point2::new(-half_flange, depth), // 3 flange left toe top
Point2::new(half_flange, depth), // 4 flange right toe top
Point2::new(half_flange, ftf), // 5 flange right toe inner (flange edge)
Point2::new(half_web, ftf), // 6 right junction (fillet)
Point2::new(half_web, 0.0), // 7 web bottom-right (web edge)
];
// Root-fillet segments per corner: 6 at Medium+, coarser below.
let seg = self.quality().profile_arc_segments(6, 2);
let radii = [
(0, r_web),
(1, rf),
(2, r_fl),
(5, r_fl),
(6, rf),
(7, r_web),
];
Ok(Profile2D::new(fillet_outline(&sharp, &radii, seg)))
}
/// Process C-shape profile (channel with lips)
/// IfcCShapeProfileDef: ProfileType, ProfileName, Position, Depth, Width, WallThickness, Girth, ...
pub(super) fn process_c_shape(&self, profile: &DecodedEntity) -> Result<Profile2D> {
// IfcCShapeProfileDef: Depth(3), Width(4), WallThickness(5), Girth(6),
// InternalFilletRadius(7). A lipped channel symmetric about its X-axis:
// a web on the left, top/bottom flanges spanning the full Width, and
// return lips of length Girth at the flange tips.
let depth = profile
.get_float(3)
.ok_or_else(|| Error::geometry("C-Shape missing Depth".to_string()))?;
let width = profile
.get_float(4)
.ok_or_else(|| Error::geometry("C-Shape missing Width".to_string()))?;
let wall_thickness = profile
.get_float(5)
.ok_or_else(|| Error::geometry("C-Shape missing WallThickness".to_string()))?;
require_positive(depth, "C-Shape Depth")?;
require_positive(width, "C-Shape Width")?;
require_positive(wall_thickness, "C-Shape WallThickness")?;
let girth = profile.get_float(6).unwrap_or(wall_thickness * 2.0); // Lip length
let half_depth = depth / 2.0;
let t = wall_thickness;
// Counter-clockwise outline. Previously this used `girth` as the X
// extent and dropped `width` entirely, so the channel came out only
// ~girth wide (a few × the thickness) instead of its full Width. The
// flanges now span [0, Width]; the lips turn inward by Girth at x=Width.
let points = vec![
Point2::new(0.0, -half_depth), // bottom-left outer
Point2::new(width, -half_depth), // bottom-right outer
Point2::new(width, -half_depth + girth), // bottom lip tip
Point2::new(width - t, -half_depth + girth), // bottom lip inner
Point2::new(width - t, -half_depth + t), // bottom flange inner
Point2::new(t, -half_depth + t), // web inner bottom
Point2::new(t, half_depth - t), // web inner top
Point2::new(width - t, half_depth - t), // top flange inner
Point2::new(width - t, half_depth - girth), // top lip inner
Point2::new(width, half_depth - girth), // top lip tip
Point2::new(width, half_depth), // top-right outer
Point2::new(0.0, half_depth), // top-left outer
];
Ok(Profile2D::new(points))
}
/// Process Z-shape profile
/// IfcZShapeProfileDef: ProfileType, ProfileName, Position, Depth, FlangeWidth, WebThickness, FlangeThickness, ...
pub(super) fn process_z_shape(&self, profile: &DecodedEntity) -> Result<Profile2D> {
let depth = profile
.get_float(3)
.ok_or_else(|| Error::geometry("Z-Shape missing Depth".to_string()))?;
let flange_width = profile
.get_float(4)
.ok_or_else(|| Error::geometry("Z-Shape missing FlangeWidth".to_string()))?;
let web_thickness = profile
.get_float(5)
.ok_or_else(|| Error::geometry("Z-Shape missing WebThickness".to_string()))?;
let flange_thickness = profile
.get_float(6)
.ok_or_else(|| Error::geometry("Z-Shape missing FlangeThickness".to_string()))?;
require_positive(depth, "Z-Shape Depth")?;
require_positive(flange_width, "Z-Shape FlangeWidth")?;
require_positive(web_thickness, "Z-Shape WebThickness")?;
require_positive(flange_thickness, "Z-Shape FlangeThickness")?;
let half_depth = depth / 2.0;
let half_web = web_thickness / 2.0;
// Z-shape profile (counter-clockwise)
let points = vec![
Point2::new(-half_web, -half_depth),
Point2::new(-half_web - flange_width, -half_depth),
Point2::new(-half_web - flange_width, -half_depth + flange_thickness),
Point2::new(-half_web, -half_depth + flange_thickness),
Point2::new(-half_web, half_depth - flange_thickness),
Point2::new(half_web, half_depth - flange_thickness),
Point2::new(half_web, half_depth),
Point2::new(half_web + flange_width, half_depth),
Point2::new(half_web + flange_width, half_depth - flange_thickness),
Point2::new(half_web, half_depth - flange_thickness),
Point2::new(half_web, -half_depth + flange_thickness),
Point2::new(-half_web, -half_depth + flange_thickness),
];
Ok(Profile2D::new(points))
}
}