Open Arsenal

A platform for law-driven simulation.

PhysicsMesh Platform is a law-driven simulation infrastructure designed to compute physical reality from first principles rather than approximate motion through animation or learned visual heuristics. At its core, the system treats physics as an invariant backbone: conservation laws, causality, and collision integrity are enforced globally, while all higher-level behavior is expressed through modular extensions that operate within those constraints. The result is a simulation environment where motion is not authored or interpolated, but derived directly from time-evolving differential equations.

A key feature of the platform is its modular physics architecture. Fluids, cloth, rigid bodies, soft bodies, and hair systems are implemented as independent modules that plug into a shared physics kernel. Each module must explicitly declare its state representation, solver method, and constraint dependencies, ensuring that no subsystem can override or bypass the underlying physical laws. This creates a unified simulation environment where all interactions are resolved through a consistent constraint-based system rather than disconnected specialized engines.

PhysicsMesh Platform also introduces a spatiotemporal computation model where all motion is defined as continuous functions over time, such as position and velocity derived from integrated forces. This eliminates frame-based animation logic entirely, replacing it with mathematically consistent trajectory solving. Complementing this is a recomputable physics layer that allows simulations to be retroactively updated when material science data, engineering constraints, or environmental models change, ensuring that physical results remain consistent with the most accurate available knowledge.

To support scientific rigor, the platform includes a full source and method provenance system. Every physical parameter must be traceable to an external source such as standards bodies, research data, or experimental logs, and every computation must declare its solver method and approximation level. These are compiled into a provenance graph that enables full auditability, reproducibility, and dependency tracking across entire simulation runs.

Finally, PhysicsMesh Platform integrates a 2D and 3D rendering system that operates strictly as a projection layer over solved physics states. Rendering cannot generate motion or modify simulation data; it can only visualize the output of the physics engine. This is paired with a human-in-the-loop intent and consent module that governs when simulations can run, be modified, or be recomputed, ensuring that all operations are explicitly authorized, traceable, and aligned with user-defined intent.

This specification is released under the GNU Affero General Public License v3.0 or later (AGPL-3.0+) and may be used freely with required attribution under Section 7. A Specification Branding License is available for attribution-free deployments, with fees based on usage, scope, and deployment size.