mraphics_core/
scene.rs

1use crate::{MeshLike, MraphicsID, RenderInstance};
2use std::collections::HashMap;
3
4pub struct Scene {
5    pub instances: Vec<RenderInstance>,
6    instance_map: HashMap<MraphicsID, usize>,
7}
8
9impl Scene {
10    pub fn new() -> Self {
11        Self {
12            instances: Vec::new(),
13            instance_map: HashMap::new(),
14        }
15    }
16
17    pub fn add_mesh<M: MeshLike>(&mut self, mesh: &mut M) {
18        mesh.update();
19
20        let mut instance = mesh.build_instance();
21        mesh.update_instance(&mut instance);
22
23        self.instances.push(instance);
24        self.instance_map
25            .insert(mesh.identifier(), self.instances.len() - 1);
26    }
27
28    pub fn remove_renderable(&mut self, identifier: MraphicsID) -> Option<RenderInstance> {
29        let remove_index = *self.instance_map.get(&identifier)?;
30        let swap_index = self.instances.len() - 1;
31
32        for index in self.instance_map.values_mut() {
33            if *index == swap_index {
34                *index = remove_index;
35            }
36        }
37
38        Some(self.instances.swap_remove(remove_index))
39    }
40
41    pub fn acquire_instance(&self, identifier: MraphicsID) -> Option<&RenderInstance> {
42        let index = self.instance_map.get(&identifier)?;
43        self.instances.get(*index)
44    }
45
46    pub fn acquire_instance_unchecked(&self, identifier: MraphicsID) -> &RenderInstance {
47        &self.instances[*self.instance_map.get(&identifier).unwrap()]
48    }
49
50    pub fn acquire_instance_mut(&mut self, identifier: MraphicsID) -> Option<&mut RenderInstance> {
51        let index = self.instance_map.get(&identifier)?;
52        self.instances.get_mut(*index)
53    }
54
55    pub fn acquire_instance_mut_unchecked(
56        &mut self,
57        identifier: MraphicsID,
58    ) -> &mut RenderInstance {
59        &mut self.instances[*self.instance_map.get(&identifier).unwrap()]
60    }
61}
mraphics_core/scene.rs

mraphics_core/
scene.rs
