2D & 3D bone animation for games, in the engine

For animators — the Animation workspace.

Bones and mesh skinning with painted weights.

Open examples/rig → · Animation manual →

Features

• Bones and sprites. A bone is a node with a rest pose; a sprite is a textured polygon with painted weights.
• Pose with inverse kinematics. Drag a target and the limb follows, then key the target.
• A timeline with keys. Position, rotation, scale or any component property, with twelve easings and method tracks.
• 3D rigs from glTF. balaur import model.glb writes the joints, the mesh and the animations.

Components

Build everything with nodes and components.

type = "animation_library"

[clips.patrol]
length = 4.0
loop_mode = "pingpong"

[[clips.patrol.tracks]]
property = "position"
interpolation = "linear"
keys = [
  { time = 0.0, value = [-2.5, 0.25, -2.0] },
  { time = 4.0, value = [-2.5, 0.25, 2.0], ease = "in_out_sine" },
]

[[clips.patrol.tracks]]
keys = [{ time = 4.0, call = "on_reached_end" }]

A bone is any node carrying bone2d or bone3d, so the tree is the rig and the same clip keys bones by path.

Animations are keyframes that say when a property needs to change, and how.

The editor

Edit the bones, sprites and see the timeline in one screen.

• Bone tool. Place bones in the viewport, each a node in the tree.
• Polygon tool. Draw the polygon, then paint how much each bone moves each vertex.
• Timeline dock. Animate, key, and play the clip in the editor.

Compare

Animation features compared to other tools.

View the examples or read the docs.

Open examples/rig → · Animation manual →