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
use crate::Point3;
use crate::{curve, CurveGroup, Face};
pub struct Model<F: Face> {
pub faces: Vec<F>,
pub curves: Vec<CurveGroup>,
}
impl<F: Face> Model<F> {
pub fn new() -> Model<F> {
Model {
faces: Vec::new(),
curves: Vec::new(),
}
}
pub fn add_face(&mut self, face: F) {
self.faces.push(face);
}
pub fn add_curve(&mut self, curve: CurveGroup) {
self.curves.push(curve);
}
pub fn save_as_stl<P: AsRef<std::path::Path>>(&self, filename: P) -> std::io::Result<()> {
use std::io::{Seek, SeekFrom, Write};
let path = std::path::Path::new(filename.as_ref());
let name = path.file_stem().unwrap().to_string_lossy();
let file = std::fs::File::create(path)?;
let mut writer = std::io::BufWriter::new(file);
let header_size = 80;
let mut header = Vec::with_capacity(header_size);
writeln!(header, "Binary STL file\nName: {:57}", name)?;
header.truncate(header_size);
writer.write(&header)?;
let mut triangle_count: usize = 0;
writer.write(&(triangle_count as u32).to_le_bytes())?;
for face in &self.faces {
let mesh = face.get_triangle_mesh();
triangle_count += mesh.triangle_count();
for triangle in mesh.triangles.chunks(3) {
writer.write(&0.0_f32.to_le_bytes())?;
writer.write(&0.0_f32.to_le_bytes())?;
writer.write(&0.0_f32.to_le_bytes())?;
for index in triangle {
let point = &mesh.vertices[*index as usize];
writer.write(&(point.x as f32).to_le_bytes())?;
writer.write(&(point.y as f32).to_le_bytes())?;
writer.write(&(point.z as f32).to_le_bytes())?;
}
writer.write(&[0u8, 0u8])?;
}
}
writer.seek(SeekFrom::Start(header_size as u64))?;
dbg!(triangle_count);
writer.write(&(triangle_count as u32).to_le_bytes())?;
Ok(())
}
pub fn save_as_obj<P: AsRef<std::path::Path>>(&self, filename: P) -> std::io::Result<()> {
use std::io::Write;
let file = std::fs::File::create(filename)?;
let mut writer = std::io::LineWriter::new(file);
let mut start = 1;
for face in &self.faces {
let mesh = face.get_triangle_mesh();
for point in &mesh.vertices {
writeln!(writer, "v {} {} {}", point.x, point.y, point.z)?;
}
for triangle in mesh.triangles.chunks(3) {
writeln!(
writer,
"f {} {} {}",
start + triangle[0],
start + triangle[1],
start + triangle[2]
)?;
}
start += mesh.vertices.len() as u32;
}
Ok(())
}
pub fn save_as_svg<P: AsRef<std::path::Path>>(
&self,
filename: P,
(width, height): (f64, f64),
) -> std::io::Result<()> {
use curve::Curve;
use svg::{
node::element::{Group, Path},
node::Node,
Document,
};
let mut document = Document::new()
.set("width", format!("{}mm", width))
.set("height", format!("{}mm", height))
.set("viewBox", (0, 0, width, height));
let mut group = Group::new()
.set("transform", format!("matrix(1 0 0 -1 0 {:.0})", height))
.set("fill", "none")
.set("stroke", "black")
.set("stroke-linecap", "round");
for curve in &self.curves {
let mut data = String::new();
for segment in &curve.segments {
if let Some(line) = segment.curve.downcast_ref::<curve::Line>() {
let (u0, u1) = segment.parameter_range;
let start = line.get_point(u0);
let end = line.get_point(u1);
data.push_str(&format!("M {:.2},{:.2}", start.x, start.y));
data.push_str(&format!(" L {:.2},{:.2}", end.x, end.y));
continue;
}
if let Some(polyline) = segment.curve.downcast_ref::<curve::Polyline>() {
for (index, point) in polyline.vertices.iter().enumerate() {
if index == 0 {
data.push_str(&format!("M {:.2},{:.2}", point.x, point.y));
} else {
data.push_str(&format!(" L {:.2},{:.2}", point.x, point.y));
}
}
continue;
}
if let Some(bspline) = segment.curve.downcast_ref::<curve::BSplineCurve<Point3>>() {
if bspline.degree == 3 {
for (index, bezier_curve) in
bspline.to_piecewise_bezier().into_iter().enumerate()
{
let start = bezier_curve.control_points[0];
let cp1 = bezier_curve.control_points[1];
let cp2 = bezier_curve.control_points[2];
let end = bezier_curve.control_points[3];
if index == 0 {
data.push_str(&format!("M {:.2},{:.2}", start.x, start.y));
data.push_str(&format!(
" C {:.2},{:.2} {:.2},{:.2} {:.2},{:.2}",
cp1.x, cp1.y, cp2.x, cp2.y, end.x, end.y
));
} else {
data.push_str(&format!(
" {:.2},{:.2} {:.2},{:.2} {:.2},{:.2}",
cp1.x, cp1.y, cp2.x, cp2.y, end.x, end.y
));
}
}
continue;
}
}
let points = segment.get_points();
for point in points {
if data.len() == 0 {
data.push_str(&format!("M {:.2},{:.2}", point.x, point.y));
} else {
data.push_str(&format!(" L {:.2},{:.2}", point.x, point.y));
}
}
}
let path = Path::new().set("d", data);
group.append(path);
}
document.append(group);
svg::save(filename, &document)?;
Ok(())
}
}
mod step_reader;
pub use step_reader::ModelReader as StepReader;