Scene colliders #104
Comments
Jondolf
added
C-Enhancement
|
Yeah I think this should be relatively straightforward to add. I think Rapier just waits until the mesh/scene is ready and then adds the collider. However, I was wondering if it would be possible to generate colliders from meshes in advance once Assets V2 is ready. For convex decomposition, the VHACD algorithm that Parry uses is pretty expensive and can even take several minutes for large colliders, so ideally we would have a preprocessing step where colliders are generated at compile-time with configuration for things like detail. I haven't taken a proper look at Assets V2 yet though so I don't know if this would even be possible or if it would require a cumbersome API, but it's worth considering. For now though we can just add normal async colliders, I'll add it on my todo list |
Have you implemented any workarounds for the time being? Im using rapier's AsyncSceneCollider atm and we would love to try out xpbd. |
Not yet, but something lïke You can find For normal |
# Objective Fixes #104. Depends on #154 and #189. Currently, there's no easy way to add colliders to meshes loaded from scenes (glTFs and so on). A very common request is to have a way to generate the colliders automatically. ## Solution Add `AsyncCollider` and `AsyncSceneCollider`, which are essentially equivalents to bevy_rapier's components. Also add a `ComputedCollider` enum that determines if the colliders should be trimeshes or convex hulls. Because these rely on some Bevy features, there is a new `async-collider` feature that is enabled by default, but only in 3D because colliders can't be created from meshes in 2D currently. ### `AsyncCollider` example: ```rust use bevy::prelude::*; use bevy_xpbd_3d::prelude::*; fn setup(mut commands: Commands, mut assets: ResMut<AssetServer>) { // Spawn a cube with a convex hull collider generated from the mesh commands.spawn(( AsyncCollider(ComputedCollider::ConvexHull), PbrBundle { mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })), ..default(), }, )); } ``` ### `AsyncSceneCollider` example: ```rust use bevy::prelude::*; use bevy_xpbd_3d::prelude::*; fn setup(mut commands: Commands, mut assets: ResMut<AssetServer>) { let scene = SceneBundle { scene: assets.load("my_model.gltf#Scene0"), ..default() }; // Spawn the scene and automatically generate triangle mesh colliders commands.spawn(( scene.clone(), AsyncSceneCollider::new(Some(ComputedCollider::TriMesh)), )); // Specify configuration for specific meshes by name commands.spawn(( scene.clone(), AsyncSceneCollider::new(Some(ComputedCollider::TriMesh)) .with_shape_for_name("Tree", ComputedCollider::ConvexHull) .with_layers_for_name("Tree", CollisionLayers::from_bits(0b0010)) .with_density_for_name("Tree", 2.5), )); // Only generate colliders for specific meshes by name commands.spawn(( scene.clone(), AsyncSceneCollider::new(None) .with_shape_for_name("Tree".to_string(), Some(ComputedCollider::ConvexHull)), )); // Generate colliders for everything except specific meshes by name commands.spawn(( scene, AsyncSceneCollider::new(ComputedCollider::TriMesh) .without_shape_for_name("Tree"), )); } ``` --- ## Changes to methods I also renamed and added some more methods to make things more consistent and simple. I removed `_bevy` from the names because this crate is already for Bevy so it's unnecessary to have the prefix. ### Renamed - `trimesh_with_flags` → `trimesh_with_config` - `convex_decomposition_with_params` → `convex_decomposition_with_config` - `trimesh_from_bevy_mesh` → `trimesh_from_mesh` - `trimesh_from_bevy_mesh_with_flags` → `trimesh_from_mesh_with_config` - `convex_decomposition_from_bevy_mesh` → `convex_decomposition_from_mesh` ### Added - `convex_decomposition_from_mesh_with_config` - `convex_hull_from_mesh`
|
Hey 👋🏼 firstly: Thank you for creating Avian ❤️ Should this be reopened? I wasn't able to find anything related to scenes in the documentation 🤔 (I was so excited to have a simple solution, but it wasn't meant to be 🥲) |
Rapier have
AsyncSceneColliderto automatically generate collision after scene spawn.I would suggest to add a similar feature for convenience, but with the ability to specify collider layers.
The text was updated successfully, but these errors were encountered: