cumulus3d-core 0.3.1

Core types for cumulus3d: camera models, rigid/similarity transforms, reconstruction graph, feature store, RANSAC, PLY/GPS I/O
Documentation 
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

//! 리틀 엔디언 이진 읽기/쓰기 도우미.

use crate::error::{Error, Result};
use std::io::{Read, Write};

pub(crate) trait WriteLe: Write {
    fn put_u8(&mut self, v: u8) -> Result<()> {
        Ok(self.write_all(&[v])?)
    }
    fn put_u32(&mut self, v: u32) -> Result<()> {
        Ok(self.write_all(&v.to_le_bytes())?)
    }
    fn put_i32(&mut self, v: i32) -> Result<()> {
        Ok(self.write_all(&v.to_le_bytes())?)
    }
    fn put_u64(&mut self, v: u64) -> Result<()> {
        Ok(self.write_all(&v.to_le_bytes())?)
    }
    fn put_f32(&mut self, v: f32) -> Result<()> {
        Ok(self.write_all(&v.to_le_bytes())?)
    }
    fn put_f64(&mut self, v: f64) -> Result<()> {
        Ok(self.write_all(&v.to_le_bytes())?)
    }
    fn put_f64s(&mut self, v: &[f64]) -> Result<()> {
        for x in v {
            self.put_f64(*x)?;
        }
        Ok(())
    }
}
impl<W: Write + ?Sized> WriteLe for W {}

pub(crate) trait ReadLe: Read {
    fn get_bytes<const N: usize>(&mut self) -> Result<[u8; N]> {
        let mut b = [0u8; N];
        self.read_exact(&mut b).map_err(|e| {
            if e.kind() == std::io::ErrorKind::UnexpectedEof {
                Error::Format("파일이 예상보다 일찍 끝남".into())
            } else {
                Error::Io(e)
            }
        })?;
        Ok(b)
    }
    fn get_u8(&mut self) -> Result<u8> {
        Ok(self.get_bytes::<1>()?[0])
    }
    fn get_u32(&mut self) -> Result<u32> {
        Ok(u32::from_le_bytes(self.get_bytes()?))
    }
    fn get_i32(&mut self) -> Result<i32> {
        Ok(i32::from_le_bytes(self.get_bytes()?))
    }
    fn get_u64(&mut self) -> Result<u64> {
        Ok(u64::from_le_bytes(self.get_bytes()?))
    }
    fn get_f32(&mut self) -> Result<f32> {
        Ok(f32::from_le_bytes(self.get_bytes()?))
    }
    fn get_f64(&mut self) -> Result<f64> {
        Ok(f64::from_le_bytes(self.get_bytes()?))
    }
    fn get_f64_array<const N: usize>(&mut self) -> Result<[f64; N]> {
        let mut a = [0.0; N];
        for x in a.iter_mut() {
            *x = self.get_f64()?;
        }
        Ok(a)
    }
    /// 0 바이트로 끝나는 문자열.
    fn get_cstring(&mut self) -> Result<String> {
        let mut v = Vec::new();
        loop {
            let b = self.get_u8()?;
            if b == 0 {
                break;
            }
            v.push(b);
        }
        String::from_utf8(v).map_err(|_| Error::Format("UTF-8 이 아닌 이름".into()))
    }
    /// 길이 접두(u64) 바이트열.
    fn get_vec_u8(&mut self, n: usize) -> Result<Vec<u8>> {
        let mut v = vec![0u8; n];
        self.read_exact(&mut v)?;
        Ok(v)
    }
}
impl<R: Read + ?Sized> ReadLe for R {}

/// 손상 파일에서 거대한 할당을 막기 위한 상한 검사.
pub(crate) fn check_count(n: u64, what: &str) -> Result<usize> {
    if n > (1u64 << 40) {
        return Err(Error::Format(format!("{what} 개수가 비정상적으로 큼: {n}")));
    }
    Ok(n as usize)
}