rechtenHandSchema

rechtenHandSchema, often written as rechtenHandSchema in Dutch- or German-influenced contexts, is a data schema used to describe the geometry and biomechanics of a human right hand in digital systems. It provides a consistent representation of bones, joints, and kinematic constraints to support modeling, simulation, and visualization across medical, robotics, and animation applications. The schema is platform- and language-agnostic and is commonly serialized as JSON, YAML, or XML.

The schema centers on a right-hand model and includes a top-level structure with an identifier, a side field set to right, and a version. The primary element is bones, organized by anatomical segments: carpal bones, metacarpals, and phalanges for the five digits. Each bone entry includes an id, a human-friendly name, a parent reference, length, cross-section details, and an orientation. Joints describe the connections between consecutive bones, specifying type (hinge, ball-and-socket), degrees of freedom, joint limits, and optional drive parameters.

Coordinates and transforms use a shared right-handed coordinate system with units in millimeters. Each joint carries a position vector and an orientation quaternion or Euler angles. Local-to-global transforms allow forward kinematics and motion capture data to be applied consistently. The schema may also accommodate additional data such as contact surfaces, muscle attachment points, or collision boxes as optional extensions.

Applications include biomechanical simulations, surgical planning tools, virtual reality hand tracking, and 3D character rigging. Interoperability with other schemas is achieved through standardized identifiers and mappings to common anatomical names. A mirrored lefthand schema is typically provided to support symmetric modeling and data exchange.