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Throttled mesh scheduling to improve remesh performance

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This commit is contained in:
Joshua Barretto 2019-07-04 15:38:55 +01:00
parent 6fc2096dae
commit ef973faadf
1 changed files with 18 additions and 7 deletions
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25
voxygen/src/scene/terrain.rs
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@ -23,7 +23,7 @@ struct TerrainChunk {
struct ChunkMeshState {
pos: Vec2<i32>,
started_tick: u64,
active_worker: bool,
active_worker: Option<u64>,
}
/// A type produced by mesh worker threads corresponding to the position and mesh of a chunk.
@ -129,7 +129,7 @@ impl Terrain {
ChunkMeshState {
pos,
started_tick: current_tick,
active_worker: false,
active_worker: None,
},
);
}
@ -147,8 +147,16 @@ impl Terrain {
.mesh_todo
.values_mut()
// Only spawn workers for meshing jobs without an active worker already.
.filter(|todo| !todo.active_worker)
.filter(|todo| {
todo.active_worker
.map(|worker_tick| worker_tick < todo.started_tick)
.unwrap_or(true)
})
{
if client.thread_pool().queued_count() > 0 {
break;
}
// Find the area of the terrain we want. Because meshing needs to compute things like
// ambient occlusion and edge elision, we also need the borders of the chunk's
// neighbours too (hence the `- 1` and `+ 1`).
@ -189,16 +197,17 @@ impl Terrain {
let pos = todo.pos;
// Queue the worker thread.
let started_tick = todo.started_tick;
client.thread_pool().execute(move || {
let _ = send.send(mesh_worker(
pos,
(min_z as f32, max_z as f32),
current_tick,
started_tick,
volume,
aabb,
));
});
todo.active_worker = true;
todo.active_worker = Some(todo.started_tick);
}
// Receive a chunk mesh from a worker thread and upload it to the GPU, then store it.
@ -208,7 +217,7 @@ impl Terrain {
match self.mesh_todo.get(&response.pos) {
// It's the mesh we want, insert the newly finished model into the terrain model
// data structure (convert the mesh to a model first of course).
Some(todo) if response.started_tick == todo.started_tick => {
Some(todo) if response.started_tick <= todo.started_tick => {
self.chunks.insert(
response.pos,
TerrainChunk {
@ -230,7 +239,9 @@ impl Terrain {
},
);
self.mesh_todo.remove(&response.pos);
if response.started_tick == todo.started_tick {
self.mesh_todo.remove(&response.pos);
}
}
// Chunk must have been removed, or it was spawned on an old tick. Drop the mesh
// since it's either out of date or no longer needed.