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Unity - raycast is clearly colliding but does not work?

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1

Ok I have 2 objects on the Default layer that I need to trigger a jump with when raycast collides. I can see that the raycast is intersecting the platform:

And here is my collider on the platform:

And yet nothing is printed with:

Vector3 rotation = transform.forward;

 RaycastHit hit;
 Debug.DrawRay(new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z), rotation, Color.green);
 if (Physics.Raycast(new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z), rotation, out hit, rayDistance))
 
 print(hit.transform);
 if (hit.transform.GetComponent<Platform>() != null)
 
 Jump(hit.transform);
 
 

What is wrong here?

c# unity3d game-engine game-physics

share|improve this question

asked Mar 9 at 1:28

UserDudeUserDude

486

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  What is rayDistance?
  
  – Immersive
  Mar 9 at 1:46
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  The length of your Debug.DrawRay isn't necessarily the same as your Physics.RayCast. Make sure they are actually colliding
  
  – Savaria
  Mar 9 at 2:05
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Savaria what do you mean? How can I see what the actual raycast is or if they are colliding?
  
  – UserDude
  Mar 9 at 3:12
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Immersive 1.2f
  
  – UserDude
  Mar 9 at 3:12
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The length of your ray is stored in different variables in the two functions. In Physics.Raycast it's in the maxDistance. In Debug.DrawRay it's the length of the direction vector.
  
  – Savaria
  Mar 9 at 3:20
  

  
  
  
  

 | 
show 4 more comments

1

Ok I have 2 objects on the Default layer that I need to trigger a jump with when raycast collides. I can see that the raycast is intersecting the platform:

And here is my collider on the platform:

And yet nothing is printed with:

Vector3 rotation = transform.forward;

 RaycastHit hit;
 Debug.DrawRay(new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z), rotation, Color.green);
 if (Physics.Raycast(new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z), rotation, out hit, rayDistance))
 
 print(hit.transform);
 if (hit.transform.GetComponent<Platform>() != null)
 
 Jump(hit.transform);
 
 

What is wrong here?

c# unity3d game-engine game-physics

share|improve this question

asked Mar 9 at 1:28

UserDudeUserDude

486

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  What is rayDistance?
  
  – Immersive
  Mar 9 at 1:46
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  The length of your Debug.DrawRay isn't necessarily the same as your Physics.RayCast. Make sure they are actually colliding
  
  – Savaria
  Mar 9 at 2:05
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Savaria what do you mean? How can I see what the actual raycast is or if they are colliding?
  
  – UserDude
  Mar 9 at 3:12
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Immersive 1.2f
  
  – UserDude
  Mar 9 at 3:12
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The length of your ray is stored in different variables in the two functions. In Physics.Raycast it's in the maxDistance. In Debug.DrawRay it's the length of the direction vector.
  
  – Savaria
  Mar 9 at 3:20
  

  
  
  
  

 | 
show 4 more comments

Ok I have 2 objects on the Default layer that I need to trigger a jump with when raycast collides. I can see that the raycast is intersecting the platform:

And here is my collider on the platform:

And yet nothing is printed with:

Vector3 rotation = transform.forward;

 RaycastHit hit;
 Debug.DrawRay(new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z), rotation, Color.green);
 if (Physics.Raycast(new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z), rotation, out hit, rayDistance))
 
 print(hit.transform);
 if (hit.transform.GetComponent<Platform>() != null)
 
 Jump(hit.transform);
 
 

What is wrong here?

c# unity3d game-engine game-physics

share|improve this question

asked Mar 9 at 1:28

UserDudeUserDude

486

Vector3 rotation = transform.forward;

 RaycastHit hit;
 Debug.DrawRay(new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z), rotation, Color.green);
 if (Physics.Raycast(new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z), rotation, out hit, rayDistance))
 
 print(hit.transform);
 if (hit.transform.GetComponent<Platform>() != null)
 
 Jump(hit.transform);
 
 

share|improve this question

asked Mar 9 at 1:28

UserDudeUserDude

486

share|improve this question

asked Mar 9 at 1:28

UserDudeUserDude

486

asked Mar 9 at 1:28

UserDudeUserDude

486

asked Mar 9 at 1:28

UserDudeUserDude

486

1 Answer
1

active

oldest

votes

2

Try this code adapted from https://docs.unity3d.com/ScriptReference/Physics.Raycast.html using your values:

RaycastHit hit;
Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, Mathf.Infinity))

 Debug.DrawRay(startPoint, rotation * hit.distance, Color.yellow);
 Debug.Log("Did Hit");

else

 Debug.DrawRay(startPoint, rotation * 1000, Color.white);
 Debug.Log("Did not Hit");

Here it is a GIF from a test I did.

This is just a test to see if the problem is the difference between ray distances.

You may also use Debug.DrawLine instead and then set up the end point with the same distance used in the RayCast.

Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, rayDistance))

 Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.green);

else Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.red);

Another GIF using this code.

If it still doesn't work, try checking out the matrix collision.

Don't forget that you may also use a layermask in your raycast. :)

share|improve this answer

edited Mar 9 at 13:26

answered Mar 9 at 12:45

FayFay

1124

add a comment | 

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2

Try this code adapted from https://docs.unity3d.com/ScriptReference/Physics.Raycast.html using your values:

RaycastHit hit;
Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, Mathf.Infinity))

 Debug.DrawRay(startPoint, rotation * hit.distance, Color.yellow);
 Debug.Log("Did Hit");

else

 Debug.DrawRay(startPoint, rotation * 1000, Color.white);
 Debug.Log("Did not Hit");

Here it is a GIF from a test I did.

This is just a test to see if the problem is the difference between ray distances.

You may also use Debug.DrawLine instead and then set up the end point with the same distance used in the RayCast.

Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, rayDistance))

 Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.green);

else Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.red);

Another GIF using this code.

If it still doesn't work, try checking out the matrix collision.

Don't forget that you may also use a layermask in your raycast. :)

share|improve this answer

edited Mar 9 at 13:26

answered Mar 9 at 12:45

FayFay

1124

add a comment | 

2

Try this code adapted from https://docs.unity3d.com/ScriptReference/Physics.Raycast.html using your values:

RaycastHit hit;
Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, Mathf.Infinity))

 Debug.DrawRay(startPoint, rotation * hit.distance, Color.yellow);
 Debug.Log("Did Hit");

else

 Debug.DrawRay(startPoint, rotation * 1000, Color.white);
 Debug.Log("Did not Hit");

Here it is a GIF from a test I did.

This is just a test to see if the problem is the difference between ray distances.

You may also use Debug.DrawLine instead and then set up the end point with the same distance used in the RayCast.

Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, rayDistance))

 Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.green);

else Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.red);

Another GIF using this code.

If it still doesn't work, try checking out the matrix collision.

Don't forget that you may also use a layermask in your raycast. :)

share|improve this answer

edited Mar 9 at 13:26

answered Mar 9 at 12:45

FayFay

1124

add a comment | 

Try this code adapted from https://docs.unity3d.com/ScriptReference/Physics.Raycast.html using your values:

RaycastHit hit;
Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, Mathf.Infinity))

 Debug.DrawRay(startPoint, rotation * hit.distance, Color.yellow);
 Debug.Log("Did Hit");

else

 Debug.DrawRay(startPoint, rotation * 1000, Color.white);
 Debug.Log("Did not Hit");

Here it is a GIF from a test I did.

This is just a test to see if the problem is the difference between ray distances.

You may also use Debug.DrawLine instead and then set up the end point with the same distance used in the RayCast.

Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, rayDistance))

 Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.green);

else Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.red);

Another GIF using this code.

If it still doesn't work, try checking out the matrix collision.

Don't forget that you may also use a layermask in your raycast. :)

share|improve this answer

edited Mar 9 at 13:26

answered Mar 9 at 12:45

FayFay

1124

RaycastHit hit;
Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, Mathf.Infinity))

 Debug.DrawRay(startPoint, rotation * hit.distance, Color.yellow);
 Debug.Log("Did Hit");

else

 Debug.DrawRay(startPoint, rotation * 1000, Color.white);
 Debug.Log("Did not Hit");

Vector3 startPoint = new Vector3(transform.position.x, transform.position.y + 0.4f, transform.position.z);
if (Physics.Raycast(startPoint, rotation, out hit, rayDistance))

 Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.green);

else Debug.DrawLine(startPoint, startPoint + rotation * rayDistance, Color.red);

share|improve this answer

edited Mar 9 at 13:26

answered Mar 9 at 12:45

FayFay

1124

answered Mar 9 at 12:45

FayFay

1124

answered Mar 9 at 12:45

FayFay

1124