hytopia/docs/server.simulationeventpayloads._simulation.step_start_.md

The HYTOPIA SDK makes it easy for developers to create massively multiplayer games using JavaScript or TypeScript.

<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[Home](./index.md) &gt; [server](./server.md) &gt; [SimulationEventPayloads](./server.simulationeventpayloads.md) &gt; ["SIMULATION.STEP\_START"](./server.simulationeventpayloads._simulation.step_start_.md)

## SimulationEventPayloads."SIMULATION.STEP\_START" property

Emitted when the simulation step starts.

**Signature:**

```typescript
[SimulationEvent.STEP_START]: {
        simulation: Simulation;
        tickDeltaMs: number;
    };
```