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use binrw::binrw; | |
use binrw::io::{Cursor, Seek, SeekFrom}; | |
use binrw::{BinReaderExt, BinWriterExt}; | |
#[binrw] | |
#[derive(Debug)] | |
struct Vec3 { | |
x: f32, | |
y: f32, | |
z: f32, | |
} | |
#[binrw] | |
#[derive(Debug)] | |
struct Mesh { | |
#[bw(calc = (vertices.len() - 1) as u32)] | |
vertex_count: u32, | |
#[br(count = vertex_count + 1)] | |
vertices: Vec<Vec3>, | |
} | |
fn main() { | |
let mesh = Mesh { | |
vertices: vec![ | |
Vec3 { | |
x: 1.0, | |
y: 2.0, | |
z: 3.0, | |
}, | |
Vec3 { | |
x: 11.0, | |
y: 12.0, | |
z: 13.0, | |
}, | |
Vec3 { | |
x: 21.0, | |
y: 22.0, | |
z: 23.0, | |
}, | |
], | |
}; | |
let mut writer = Cursor::new(Vec::new()); | |
writer.write_le(&mesh).unwrap(); | |
let mut reader = writer; | |
reader.seek(SeekFrom::Start(0)).unwrap(); | |
let _: Mesh = dbg!(reader.read_le().unwrap()); | |
} |
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