bevy_feronia 0.8.2

Foliage/grass scattering tools and wind simulation shaders/materials that prioritize visual fidelity/artistic freedom, a declarative api and modularity.
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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159

use crate::backend::ScatterApp;
use crate::core::events::SpawnScatterAssets;
use crate::prelude::*;
use crate::scatter::{observers::*, systems::prelude::*};
use crate::{
    asset::backend::systems::{insert_parts, insert_requests},
    asset::systems::*,
};

use bevy_app::prelude::*;
use bevy_asset::prelude::{AssetApp, Assets};
use bevy_ecs::{prelude::resource_exists, schedule::IntoScheduleConfigs};
use bevy_pbr::prelude::StandardMaterial;
use bevy_state::prelude::*;

use bevy_transform::TransformSystems;
use std::marker::PhantomData;

pub struct ScatterAssetPlugin<T = StandardMaterial>
where
    T: ScatterMaterial,
{
    _marker: PhantomData<T>,
}

impl<T> ScatterAssetPlugin<T>
where
    T: ScatterMaterial,
{
    pub fn new() -> Self {
        Self {
            _marker: PhantomData,
        }
    }
}

impl<T> Default for ScatterAssetPlugin<T>
where
    T: ScatterMaterial,
{
    fn default() -> Self {
        Self::new()
    }
}

impl<T> Plugin for ScatterAssetPlugin<T>
where
    T: ScatterMaterial,
{
    fn build(&self, app: &mut App) {
        if !app.is_plugin_added::<ScatterPlugin>() {
            app.add_plugins(ScatterPlugin);
        }

        app.init_resource::<SpawnScatterAssetsEventQueue<T>>()
            .init_resource::<ScatterAssetManager<T>>()
            .init_asset::<ScatterAsset<T>>()
            .add_message::<ScatterChunk<T>>()
            .add_message::<ScatterResults<T>>()
            .add_message::<ScatterFinished<T>>()
            .add_observer(on_add_scatter_root::<T>)
            .add_observer(on_add_scatter_layer::<T>)
            .add_observer(on_chunk_add::<T>)
            .add_systems(
                PreUpdate,
                process_scatter_queue::<T>.in_set(ScatterSet::Ready),
            )
            .add_systems(
                Update,
                (
                    manage_asset_lifecycle::<T>,
                    chunk_init_scatter::<T>.in_set(ChunkSet::Ready),
                    (
                        handle_finished_scatter_tasks::<T>,
                        spawn::<T>.run_if(resource_exists::<Assets<ScatterAsset<T>>>),
                    )
                        .in_set(ScatterSet::Ready),
                ),
            )
            .add_systems(
                PostUpdate,
                handle_scatter_requests::<T>
                    .after(TransformSystems::Propagate)
                    .in_set(ScatterSet::Ready),
            );
    }
}

pub struct ScatterPlugin;

impl Plugin for ScatterPlugin {
    fn build(&self, app: &mut App) {
        app.configure_scatter_sets()
            .add_plugins((
                ChunkPlugin,
                HeightMapPlugin,
                WindPlugin,
                ScatterOccupancyMapPlugin,
            ))
            .init_state::<ScatterState>()
            .init_resource::<WorldSeed>()
            .add_message::<ClearScatterLayer>()
            .add_message::<ClearScatterRoot>()
            .add_observer(on_add_scatter_item)
            .add_systems(
                Update,
                (
                    transition_to_collecting.in_set(ScatterSet::Setup),
                    (
                        check_unprocessed_layers,
                        check_unprocessed_items,
                        check_unprocessed_root,
                    )
                        .in_set(ScatterSet::Collecting),
                    clear_scatter_roots.in_set(ScatterSet::Ready),
                    (clear_chunks, clear_scatter_layers).in_set(ScatterSet::Clean),
                ),
            )
            .add_systems(
                PostUpdate,
                setup_root_aabb
                    .in_set(ScatterSet::Setup)
                    .after(TransformSystems::Propagate),
            );
    }
}

pub struct StandardScatterPlugin;

impl Plugin for StandardScatterPlugin {
    fn build(&self, app: &mut App) {
        app.add_message::<SpawnScatterAssets>()
            .add_message::<SpawnScatterAssets>()
            .add_plugins((
                ScatterMaterialPlugin::<StandardMaterial>::new(),
                StandardScatterAssetRequestPlugin,
                ScatterAssetPlugin::<StandardMaterial>::new(),
            ));
    }
}

pub struct StandardScatterAssetRequestPlugin;

impl Plugin for StandardScatterAssetRequestPlugin {
    fn build(&self, app: &mut App) {
        app.add_systems(
            PostUpdate,
            (
                insert_parts::<StandardMaterial>,
                insert_requests::<StandardMaterial>,
            )
                .in_set(ScatterSet::Collecting),
        )
        .add_systems(
            Update,
            process_standard_requests.in_set(ScatterSet::Collecting),
        );
    }
}