[Home](./index.md) > [server](./server.md) > [Simulation](./server.simulation.md) > [raycast](./server.simulation.raycast.md) ## Simulation.raycast() method Casts a ray through the simulation. **Signature:** ```typescript raycast(origin: RAPIER.Vector3, direction: RAPIER.Vector3, length: number, options?: RaycastOptions): RaycastHit | null; ``` ## Parameters

Parameter	Type	Description
origin	RAPIER.Vector3	The origin of the ray.
direction	RAPIER.Vector3	The direction of the ray.
length	number	The length of the ray.
options	[RaycastOptions](./server.raycastoptions.md)	_(Optional)_ The options for the raycast.

**Returns:** [RaycastHit](./server.raycasthit.md) \| null A RaycastHit object containing the first block or entity hit by the ray, or null if no hit. ## Remarks The cast ray will stop at the the first block or entity hit within the length of the ray.