| origin | The starting point of the ray in world coordinates. |
| direction | The direction of the ray. |
| distance | The length of the ray. |
| layerMask | A Layer mask that is used to selectively ignore colliders when casting a ray. |
bool True when the ray intersects any collider, otherwise false.
Casts a ray against all colliders in the scene.
function Update () {
var fwd = transform.TransformDirection (Vector3.forward);
if (Physics.Raycast (transform.position, fwd, 10)) {
print ("There is something in front of the object!");
}
}
using UnityEngine; using System.Collections; public class ExampleClass : MonoBehaviour { void Update() { Vector3 fwd = transform.TransformDirection(Vector3.forward); if (Physics.Raycast(transform.position, fwd, 10)) print("There is something in front of the object!"); } }
import UnityEngine import System.Collections public class ExampleClass(MonoBehaviour): def Update() as void: fwd as Vector3 = transform.TransformDirection(Vector3.forward) if Physics.Raycast(transform.position, fwd, 10): print('There is something in front of the object!')
Notes: This function will return false if you cast a ray from inside a sphere to the outside; this in an intended behaviour. If you move colliders from scripting or by animation, there needs to be at least one FixedUpdate executed so that the physics library can update it's data structures, before a Raycast will hit the collider at it's new position.
| origin | The starting point of the ray in world coordinates. |
| direction | The direction of the ray. |
| distance | The length of the ray. |
| hitInfo | If true is returned, hitInfo will contain more information about where the collider was hit (See Also: RaycastHit). |
| layerMask | A Layer mask that is used to selectively ignore colliders when casting a ray. |
bool True when the ray intersects any collider, otherwise false.
Casts a ray against all colliders in the scene and returns detailed information on what was hit.
function Update () {
var hit : RaycastHit;
if (Physics.Raycast (transform.position, -Vector3.up, hit)) {
var distanceToGround = hit.distance;
}
}
using UnityEngine; using System.Collections; public class ExampleClass : MonoBehaviour { void Update() { RaycastHit hit; if (Physics.Raycast(transform.position, -Vector3.up, out hit)) float distanceToGround = hit.distance; } }
import UnityEngine import System.Collections public class ExampleClass(MonoBehaviour): def Update() as void: hit as RaycastHit if Physics.Raycast(transform.position, -Vector3.up, ): distanceToGround as float = hit.distance
Another example:
// Raycast up to 100 meters down function Update () {
var hit : RaycastHit;
if (Physics.Raycast (transform.position, -Vector3.up, hit, 100.0)) {
var distanceToGround = hit.distance;
}
}
using UnityEngine; using System.Collections; public class ExampleClass : MonoBehaviour { void Update() { RaycastHit hit; if (Physics.Raycast(transform.position, -Vector3.up, out hit, 100.0F)) float distanceToGround = hit.distance; } }
import UnityEngine import System.Collections public class ExampleClass(MonoBehaviour): def Update() as void: hit as RaycastHit if Physics.Raycast(transform.position, -Vector3.up, , 100.0F): distanceToGround as float = hit.distance
| ray | The starting point and direction of the ray. |
| distance | The length of the ray. |
| layerMask | A Layer mask that is used to selectively ignore colliders when casting a ray. |
bool True when the ray intersects any collider, otherwise false.
Same as above using /ray.origin/ and /ray.direction/ instead of origin and direction.
function Update() {
var ray = Camera.main.ScreenPointToRay (Input.mousePosition); if (Physics.Raycast (ray, 100)) {
print ("Hit something");
}
}
using UnityEngine; using System.Collections; public class ExampleClass : MonoBehaviour { void Update() { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); if (Physics.Raycast(ray, 100)) print("Hit something"); } }
import UnityEngine import System.Collections public class ExampleClass(MonoBehaviour): def Update() as void: ray as Ray = Camera.main.ScreenPointToRay(Input.mousePosition) if Physics.Raycast(ray, 100): print('Hit something')
| ray | The starting point and direction of the ray. |
| distance | The length of the ray. |
| hitInfo | If true is returned, hitInfo will contain more information about where the collider was hit (See Also: RaycastHit). |
| layerMask | A Layer mask that is used to selectively ignore colliders when casting a ray. |
bool True when the ray intersects any collider, otherwise false.
Same as above using /ray.origin/ and /ray.direction/ instead of origin and direction.
function Update() {
var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
var hit : RaycastHit;
if (Physics.Raycast (ray, hit, 100)) {
Debug.DrawLine (ray.origin, hit.point);
}
}
using UnityEngine; using System.Collections; public class ExampleClass : MonoBehaviour { void Update() { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); RaycastHit hit; if (Physics.Raycast(ray, out hit, 100)) Debug.DrawLine(ray.origin, hit.point); } }
import UnityEngine import System.Collections public class ExampleClass(MonoBehaviour): def Update() as void: ray as Ray = Camera.main.ScreenPointToRay(Input.mousePosition) hit as RaycastHit if Physics.Raycast(ray, , 100): Debug.DrawLine(ray.origin, hit.point)