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Handle wgsl errors in the game of life example (#13624)

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Currently copypasting the example into a new project without also
copying "shaders/game_of_life.wgsl" gives an unhelpful blank screen.
This change makes it panic instead. I think nicer error handling is
outside scope of the example, and this is good enough to point out that
the shader code is missing.
This commit is contained in:
Kornel 2024-06-03 14:31:56 +01:00 committed by GitHub
parent 190d032ae4
commit 8d666c8adf
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GPG Key ID: B5690EEEBB952194
1 changed files with 12 additions and 5 deletions
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17
examples/shader/compute_shader_game_of_life.rs
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@ -17,6 +17,9 @@ use bevy::{
};
use std::borrow::Cow;
/// This example uses a shader source file from the assets subdirectory
const SHADER_ASSET_PATH: &str = "shaders/game_of_life.wgsl";
const DISPLAY_FACTOR: u32 = 4;
const SIZE: (u32, u32) = (1280 / DISPLAY_FACTOR, 720 / DISPLAY_FACTOR);
const WORKGROUP_SIZE: u32 = 8;
@ -169,7 +172,7 @@ impl FromWorld for GameOfLifePipeline {
),
),
);
let shader = world.load_asset("shaders/game_of_life.wgsl");
let shader = world.load_asset(SHADER_ASSET_PATH);
let pipeline_cache = world.resource::<PipelineCache>();
let init_pipeline = pipeline_cache.queue_compute_pipeline(ComputePipelineDescriptor {
label: None,
@ -222,10 +225,14 @@ impl render_graph::Node for GameOfLifeNode {
// if the corresponding pipeline has loaded, transition to the next stage
match self.state {
GameOfLifeState::Loading => {
if let CachedPipelineState::Ok(_) =
pipeline_cache.get_compute_pipeline_state(pipeline.init_pipeline)
{
self.state = GameOfLifeState::Init;
match pipeline_cache.get_compute_pipeline_state(pipeline.init_pipeline) {
CachedPipelineState::Ok(_) => {
self.state = GameOfLifeState::Init;
}
CachedPipelineState::Err(err) => {
panic!("Initializing assets/{SHADER_ASSET_PATH}:\n{err}")
}
_ => {}
}
}
GameOfLifeState::Init => {