mirror of
https://github.com/bevyengine/bevy
synced 2024-12-23 11:33:06 +00:00
e6405bb7b4
# Objective
- Reduce the number of rebindings to enable batching of draw commands
## Solution
- Use the new `GpuArrayBuffer` for `MeshUniform` data to store all
`MeshUniform` data in arrays within fewer bindings
- Sort opaque/alpha mask prepass, opaque/alpha mask main, and shadow
phases also by the batch per-object data binding dynamic offset to
improve performance on WebGL2.
---
## Changelog
- Changed: Per-object `MeshUniform` data is now managed by
`GpuArrayBuffer` as arrays in buffers that need to be indexed into.
## Migration Guide
Accessing the `model` member of an individual mesh object's shader
`Mesh` struct the old way where each `MeshUniform` was stored at its own
dynamic offset:
```rust
struct Vertex {
@location(0) position: vec3<f32>,
};
fn vertex(vertex: Vertex) -> VertexOutput {
var out: VertexOutput;
out.clip_position = mesh_position_local_to_clip(
mesh.model,
vec4<f32>(vertex.position, 1.0)
);
return out;
}
```
The new way where one needs to index into the array of `Mesh`es for the
batch:
```rust
struct Vertex {
@builtin(instance_index) instance_index: u32,
@location(0) position: vec3<f32>,
};
fn vertex(vertex: Vertex) -> VertexOutput {
var out: VertexOutput;
out.clip_position = mesh_position_local_to_clip(
mesh[vertex.instance_index].model,
vec4<f32>(vertex.position, 1.0)
);
return out;
}
```
Note that using the instance_index is the default way to pass the
per-object index into the shader, but if you wish to do custom rendering
approaches you can pass it in however you like.
---------
Co-authored-by: robtfm <50659922+robtfm@users.noreply.github.com>
Co-authored-by: Elabajaba <Elabajaba@users.noreply.github.com>
34 lines
1.2 KiB
TOML
34 lines
1.2 KiB
TOML
[package]
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name = "bevy_pbr"
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version = "0.12.0-dev"
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edition = "2021"
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description = "Adds PBR rendering to Bevy Engine"
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homepage = "https://bevyengine.org"
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repository = "https://github.com/bevyengine/bevy"
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license = "MIT OR Apache-2.0"
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keywords = ["bevy"]
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[features]
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webgl = []
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[dependencies]
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# bevy
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bevy_app = { path = "../bevy_app", version = "0.12.0-dev" }
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bevy_asset = { path = "../bevy_asset", version = "0.12.0-dev" }
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bevy_core_pipeline = { path = "../bevy_core_pipeline", version = "0.12.0-dev" }
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bevy_ecs = { path = "../bevy_ecs", version = "0.12.0-dev" }
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bevy_math = { path = "../bevy_math", version = "0.12.0-dev" }
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bevy_reflect = { path = "../bevy_reflect", version = "0.12.0-dev", features = ["bevy"] }
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bevy_render = { path = "../bevy_render", version = "0.12.0-dev" }
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bevy_transform = { path = "../bevy_transform", version = "0.12.0-dev" }
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bevy_utils = { path = "../bevy_utils", version = "0.12.0-dev" }
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bevy_window = { path = "../bevy_window", version = "0.12.0-dev" }
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bevy_derive = { path = "../bevy_derive", version = "0.12.0-dev" }
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# other
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bitflags = "2.3"
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# direct dependency required for derive macro
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bytemuck = { version = "1", features = ["derive"] }
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naga_oil = "0.8"
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radsort = "0.1"
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smallvec = "1.6"
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