Module skeleton 

Skeleton, pose, and CPU linear blend skinning.

These types form the substrate for skeletal animation. A Skeleton defines the bone hierarchy and bind-pose inverses. A Pose holds local-space transforms for each joint. JointMatrices::compute runs forward kinematics and returns the per-joint skinning matrices ready for apply_skin.

Workflow

// Once at startup:
let skeleton = Skeleton::new(joints);
let base_pose = Pose::identity(skeleton.joint_count());

// Each frame (in a plugin at phase::ANIMATE or later):
ctx.resources.insert(my_pose); // write current pose

// SkeletonPlugin at phase::POST_SIM reads the pose and pushes a
// SkinnedMeshUpdate to ctx.output.skinned_mesh_updates.

// After runtime.step(), in the app:
for u in &output.skinned_mesh_updates {
    renderer.resources_mut()
        .write_mesh_positions_normals(queue, u.mesh_id, &u.positions, &u.normals)
        .ok();
}

Structs

Joint

A single joint in a skeleton hierarchy.

JointMatrices

Per-joint skinning matrices computed from a Skeleton and Pose.

Pose

Per-frame local-space transforms for each joint.

Skeleton

A joint hierarchy with bind-pose inverse matrices.

Constants

MAX_JOINTS

Maximum number of joints in a skeleton.

Functions

apply_skin

Apply CPU linear blend skinning to a mesh.