Mouse position help

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1

Hi all. I’m trying to get a beam to go from an flying ship to the ground where the mouse is clicking. However I’m having a hard time getting the beam to go from the ship. Its a top down view so the camera is not attached to the ship so I have a problem with doing raycasts from the point of view of the ship. heres what I’ve been using

if(Input.GetMouseButtonDown(0)){
var mousePo = camera.ScreenToWorldPoint (Vector3 (Input.mousePosition.x, Input.mousePosition.y,camera.nearClipPlane));
var ray = camera.ScreenPointToRay(mousePo);
Instantiate (particle, mousePo, Quaternion.identity);
}

any idea how I can make a beam go from the ship down to the ground where the mouse is clicking? Thanks in advance!

1 Answer

1
2

I believe your solution is better considered in two parts:

1- raycast from camera to ground
2- ray from any transform to raycast hitpoint

in particular, to solve the first need:

   private Plane drivingplane = new Plane(Vector3.up, Vector3.zero);...

   void Update () {
		Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
		float ent = 1.0f;

		if (drivingplane.Raycast(ray,out ent))
		{
			Vector3 hitPoint = ray.GetPoint(ent);
			Debug.DrawRay (ray.origin, ray.direction * ent, Color.green);
		}
		else
			Debug.DrawRay (ray.origin, ray.direction * 10, Color.red);
    }

consequently, to solve point 2

Debug.DrawRay (transform.position, hitpoint);