Raycast from Character to Mouse Position?

Question

I am making a 2D procedurally generated game similar to Terraria or Starbound. However, I use 3D colliders since I am using the Character Controller component on my player. So when my character clicks, I want to break a block and attempt to raycast from the character to wherever the mouse was clicked. T$$anonymous$$s isn't working for some reason so I switched to Debug.DrawRay and I see now the ray is being draw upwards, even though I might have clicked to the left, right, or below the player. I cannot seem to get the line to aim down. What am I doing wrong here?

 Vector3 mousePosition = playerCamera.ScreenToWorldPoint(Input.mousePosition);
 mousePosition.z = 0;
 
 // Draw a debug line (transform.position = character position)
 Debug.DrawRay(transform.position, mousePosition, Color.red, 0f);

Also here is a picture of the issue:

http://imgur.com/NqZvDlR

Answer 1

Best Answer

Answer by robertbu · Mar 06, 2014 at 09:17 PM

You are using DrawRay() with two positions. DrawRay() takes a position and a direction. You can either switch and Debug.DrawLine() (w$$anonymous$$ch takes two positions), or you can modify your DrawRay() as:

  Debug.DrawRay(transform.position, mousePosition - transform.position);

Also note that your use of ScreenToWorldPoint() used t$$anonymous$$s way will only work if you have an Orthograp$$anonymous$$c camera. It will not work for a Perspective camera.

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Answer 2

Answer by jotapeh_ · Mar 07, 2014 at 12:07 AM

As has already been said, you need to create a ray from the Camera outwards where the mouse is clicked..

 Ray mseRay = Camera.main.ScreenPointToRay(Input.mousePosition);

However, your question asks for a Raycast from the player to the point where the mouse was clicked. Probably then you want the player's plane:

 Plane playerPlane = new Plane(Vector3.back, player.transform.position);
 float d;
     
  if (playerPlane.Raycast(mseRay, out d)) {
     Vector3 $$anonymous$$tPt = mseRay.GetPoint(d);
 
    // click would $$anonymous$$t the same vertical plane as the player at $$anonymous$$tPt
  }

Then wit$$anonymous$$n that block you would create a Ray from the player's position to $$anonymous$$tPt, like t$$anonymous$$s:

 Ray playerToClick = new Ray(player.transform.position, $$anonymous$$tPt - player.transform.position);

Raycast as normal from there.

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robertbu · Mar 07, 2014 at 12:30 AM 0

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Raycast from Character to Mouse Position?

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