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

//! Mesh form implementation.

use crate::{
    err::Error,
    file::{Build, Load},
    geom::Transformable,
    math::Trans3Builder,
};
use arctk_attr::load;
use std::path::Path;

/// Loadable triangle mesh conglomerate structure.
#[load]
pub struct MeshBuilder(
    /// List of object files.
    Vec<String>,
    /// Optional transformation.
    Option<Trans3Builder>,
);

impl Build for MeshBuilder {
    type Inst = crate::geom::Mesh;

    #[inline]
    fn build(self, in_dir: &Path) -> Result<Self::Inst, Error> {
        let trans = if let Some(t) = self.1 {
            Some(t.build(in_dir)?)
        } else {
            None
        };

        let mut tris = Vec::new();
        for name in self.0 {
            let mut obj = Self::Inst::load(&in_dir.join(name))?;
            if let Some(t) = trans {
                obj.transform(&t);
            }
            tris.extend(obj.into_tris())
        }

        Ok(Self::Inst::new(tris))
    }
}