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
|
/*
* Copyright (C) Oscar Shrimpton 2020
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
//! Helper functions for parsing
use na::{Vector2, Vector3};
use std::convert::TryInto;
/// Turn a slice into a le i32, the int datatype in a bsp file.
/// # Panics
/// If slice is not 4 bytes long
pub fn slice_to_i32(slice: &[u8]) -> i32 {
i32::from_le_bytes(slice.try_into().unwrap())
}
/// Turn a slice into a le u32, used for some bitflags.
/// # Panics
/// If slice is not 4 bytes long.
pub fn slice_to_u32(slice: &[u8]) -> u32 {
u32::from_le_bytes(slice.try_into().unwrap())
}
/// Turn a slice into a le f32, the float datatype in a bsp file.
/// # Panics
/// If slice is not 4 bytes long
pub fn slice_to_f32(slice: &[u8]) -> f32 {
f32::from_bits(u32::from_le_bytes(slice.try_into().unwrap()))
}
/// Turn a slice of floats into a 3D vector
/// # Panics
/// If slice isn't 12 bytes long.
pub fn slice_to_vec3(slice: &[u8]) -> Vector3<f32> {
Vector3::new(
slice_to_f32(&slice[0..4]),
slice_to_f32(&slice[4..8]),
slice_to_f32(&slice[8..12]),
)
}
/// Turn a slice of i32s into a 3D vector
/// # Panics
/// If slice isn't 12 bytes long.
pub fn slice_to_vec3i(slice: &[u8]) -> Vector3<i32> {
Vector3::new(
slice_to_i32(&slice[0..4]),
slice_to_i32(&slice[4..8]),
slice_to_i32(&slice[8..12]),
)
}
/// Turn a slice of u32s into a 2D vector
/// # Panics
/// If slice isn't 8 bytes long.
pub fn slice_to_vec2ui(slice: &[u8]) -> Vector2<u32> {
Vector2::new(slice_to_u32(&slice[0..4]), slice_to_u32(&slice[4..8]))
}
|
