Implement gltf animation loading, playback example

Cargo.toml

@@ -21,6 +21,7 @@ members = ["crates/*", "examples/ios", "tools/ci"]
 
 [features]
 default = [
+  "bevy_animation_rig",
   "bevy_audio",
   "bevy_dynamic_plugin",
   "bevy_gilrs",
@@ -41,6 +42,7 @@ dynamic = ["bevy_dylib"]
 render = ["bevy_internal/bevy_pbr", "bevy_internal/bevy_render", "bevy_internal/bevy_sprite", "bevy_internal/bevy_text", "bevy_internal/bevy_ui"]
 
 # Optional bevy crates
+bevy_animation_rig = ["bevy_internal/bevy_animation_rig"]
 bevy_audio = ["bevy_internal/bevy_audio"]
 bevy_dynamic_plugin = ["bevy_internal/bevy_dynamic_plugin"]
 bevy_gilrs = ["bevy_internal/bevy_gilrs"]
@@ -176,6 +178,19 @@ path = "examples/3d/wireframe.rs"
 name = "z_sort_debug"
 path = "examples/3d/z_sort_debug.rs"
 
+# Animation
+[[example]]
+name = "custom_skinned_mesh"
+path = "examples/animation/custom_skinned_mesh.rs"
+
+[[example]]
+name = "gltf_skinned_mesh"
+path = "examples/animation/gltf_skinned_mesh.rs"
+
+[[example]]
+name = "gltf_skinned_mesh_using_animation_data"
+path = "examples/animation/gltf_skinned_mesh_using_animation_data.rs"
+
 # Application
 [[example]]
 name = "custom_loop"

assets/models/SimpleSkin/SimpleSkin.gltf

@@ -0,0 +1 @@
+{"scenes":[{"nodes":[0]}],"nodes":[{"skin":0,"mesh":0,"children":[1]},{"children":[2],"translation":[0,1,0]},{"rotation":[0,0,0,1]}],"meshes":[{"primitives":[{"attributes":{"POSITION":1,"JOINTS_0":2,"WEIGHTS_0":3},"indices":0}]}],"skins":[{"inverseBindMatrices":4,"joints":[1,2]}],"animations":[{"channels":[{"sampler":0,"target":{"node":2,"path":"rotation"}}],"samplers":[{"input":5,"interpolation":"LINEAR","output":6}]}],"buffers":[{"uri":"data:application/gltf-buffer;base64,AAABAAMAAAADAAIAAgADAAUAAgAFAAQABAAFAAcABAAHAAYABgAHAAkABgAJAAgAAAAAAAAAAAAAAAAAAACAPwAAAAAAAAAAAAAAAAAAAD8AAAAAAACAPwAAAD8AAAAAAAAAAAAAgD8AAAAAAACAPwAAgD8AAAAAAAAAAAAAwD8AAAAAAACAPwAAwD8AAAAAAAAAAAAAAEAAAAAAAACAPwAAAEAAAAAA","byteLength":168},{"uri":"data:application/gltf-buffer;base64,AAABAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAgD8AAAAAAAAAAAAAAAAAAIA/AAAAAAAAAAAAAAAAAABAPwAAgD4AAAAAAAAAAAAAQD8AAIA+AAAAAAAAAAAAAAA/AAAAPwAAAAAAAAAAAAAAPwAAAD8AAAAAAAAAAAAAgD4AAEA/AAAAAAAAAAAAAIA+AABAPwAAAAAAAAAAAAAAAAAAgD8AAAAAAAAAAAAAAAAAAIA/AAAAAAAAAAA=","byteLength":320},{"uri":"data:application/gltf-buffer;base64,AACAPwAAAAAAAAAAAAAAAAAAAAAAAIA/AAAAAAAAAAAAAAAAAAAAAAAAgD8AAAAAAAAAvwAAgL8AAAAAAACAPwAAgD8AAAAAAAAAAAAAAAAAAAAAAACAPwAAAAAAAAAAAAAAAAAAAAAAAIA/AAAAAAAAAL8AAIC/AAAAAAAAgD8=","byteLength":128},{"uri":"data:application/gltf-buffer;base64,AAAAAAAAAD8AAIA/AADAPwAAAEAAACBAAABAQAAAYEAAAIBAAACQQAAAoEAAALBAAAAAAAAAAAAAAAAAAACAPwAAAAAAAAAAkxjEPkSLbD8AAAAAAAAAAPT9ND/0/TQ/AAAAAAAAAAD0/TQ/9P00PwAAAAAAAAAAkxjEPkSLbD8AAAAAAAAAAAAAAAAAAIA/AAAAAAAAAAAAAAAAAACAPwAAAAAAAAAAkxjEvkSLbD8AAAAAAAAAAPT9NL/0/TQ/AAAAAAAAAAD0/TS/9P00PwAAAAAAAAAAkxjEvkSLbD8AAAAAAAAAAAAAAAAAAIA/","byteLength":240}],"bufferViews":[{"buffer":0,"byteOffset":0,"byteLength":48,"target":34963},{"buffer":0,"byteOffset":48,"byteLength":120,"target":34962},{"buffer":1,"byteOffset":0,"byteLength":320,"byteStride":16},{"buffer":2,"byteOffset":0,"byteLength":128},{"buffer":3,"byteOffset":0,"byteLength":240}],"accessors":[{"bufferView":0,"byteOffset":0,"componentType":5123,"count":24,"type":"SCALAR","max":[9],"min":[0]},{"bufferView":1,"byteOffset":0,"componentType":5126,"count":10,"type":"VEC3","max":[1,2,0],"min":[0,0,0]},{"bufferView":2,"byteOffset":0,"componentType":5123,"count":10,"type":"VEC4","max":[0,1,0,0],"min":[0,1,0,0]},{"bufferView":2,"byteOffset":160,"componentType":5126,"count":10,"type":"VEC4","max":[1,1,0,0],"min":[0,0,0,0]},{"bufferView":3,"byteOffset":0,"componentType":5126,"count":2,"type":"MAT4","max":[1,0,0,0,0,1,0,0,0,0,1,0,-0.5,-1,0,1],"min":[1,0,0,0,0,1,0,0,0,0,1,0,-0.5,-1,0,1]},{"bufferView":4,"byteOffset":0,"componentType":5126,"count":12,"type":"SCALAR","max":[5.5],"min":[0]},{"bufferView":4,"byteOffset":48,"componentType":5126,"count":12,"type":"VEC4","max":[0,0,0.707,1],"min":[0,0,-0.707,0.707]}],"asset":{"version":"2.0"}}

crates/bevy_animation_rig/Cargo.toml

@@ -0,0 +1,24 @@
+[package]
+name = "bevy_animation_rig"
+version = "0.5.0"
+edition = "2018"
+authors = [
+    "Bevy Contributors <[email protected]>",
+    "Carter Anderson <[email protected]>",
+]
+description = "Bevy Engine Animation Rigging System"
+homepage = "https://bevyengine.org"
+repository = "https://github.com/bevyengine/bevy"
+license = "MIT"
+keywords = ["bevy", "animation", "rig", "skeleton"]
+
+[dependencies]
+# bevy
+bevy_app = { path = "../bevy_app", version = "0.5.0" }
+bevy_asset = { path = "../bevy_asset", version = "0.5.0" }
+bevy_ecs = { path = "../bevy_ecs", version = "0.5.0" }
+bevy_math = { path = "../bevy_math", version = "0.5.0" }
+bevy_pbr = { path = "../bevy_pbr", version = "0.5.0" }
+bevy_reflect = { path = "../bevy_reflect", version = "0.5.0", features = ["bevy"] }
+bevy_render = { path = "../bevy_render", version = "0.5.0" }
+bevy_transform = { path = "../bevy_transform", version = "0.5.0" }

crates/bevy_animation_rig/src/lib.rs

@@ -0,0 +1,39 @@
+use bevy_app::{AppBuilder, CoreStage, Plugin, StartupStage};
+use bevy_asset::AddAsset;
+use bevy_ecs::{
+    schedule::{ParallelSystemDescriptorCoercion, SystemLabel},
+    system::IntoSystem,
+};
+use bevy_transform::TransformSystem;
+
+mod skinned_mesh;
+pub use skinned_mesh::*;
+
+#[derive(Debug, Hash, PartialEq, Eq, Clone, SystemLabel)]
+pub enum AnimationRigSystem {
+    SkinnedMeshSetup,
+    SkinnedMeshUpdate,
+}
+
+#[derive(Default)]
+pub struct AnimationRigPlugin;
+
+impl Plugin for AnimationRigPlugin {
+    fn build(&self, app: &mut AppBuilder) {
+        app.register_type::<SkinnedMesh>()
+            .add_asset::<SkinnedMeshInverseBindposes>()
+            .add_startup_system_to_stage(
+                StartupStage::PreStartup,
+                skinned_mesh_setup
+                    .system()
+                    .label(AnimationRigSystem::SkinnedMeshSetup),
+            )
+            .add_system_to_stage(
+                CoreStage::PostUpdate,
+                skinned_mesh_update
+                    .system()
+                    .label(AnimationRigSystem::SkinnedMeshUpdate)
+                    .after(TransformSystem::TransformPropagate),
+            );
+    }
+}