ShapeDefinition Class

Describes the geometry of a Box2D shape. Passed to Shape or AddSubShape(ShapeDefinition, bool, Nullable<float>, Nullable<float>).

Shape definitions are immutable records. Changing a property (e.g. Radius, Width, Height) creates a new record value — it does not automatically update a live Box2D body. To resize a shape at runtime you must reassign Shape (or the sub-shape's Brine2D.ECS.Components.SubShape.Definition) with the new record. The physics system detects the assignment and triggers a full body rebuild on the next tick, which resets all shape IDs and clears sub-step kinematic state. Set shape dimensions once at construction time where possible.

public abstract record ShapeDefinition : System.IEquatable<Brine2D.Physics.ShapeDefinition>

Inheritance System.Object → ShapeDefinition

Derived
↳ BoxShape
↳ CapsuleShape
↳ ChainShape
↳ CircleShape
↳ PolygonShape
↳ SegmentShape

Implements System.IEquatable<ShapeDefinition>

Fields
MaxPolygonVertices	Maximum polygon vertices supported by Box2D.