Projection to mouse position in isometric game

[GeneralMidi]

Hi,

I have an orthographic camera which is sat directly behind my character, raised somewhat and looking down on him. I am aiming to fire a prefab in the direction of the mouse. I’ve looked all over and I feel like I’m close but I can’t quite get the right results.

				//float dist = Camera.main.transform.position.y-transform.position.y;				
				//Vector3 mousePos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, dist);
				Vector3 mousePos = new Vector3(Input.mousePosition.x, Input.mousePosition.y, Camera.mainCamera.transform.position.y);
				Vector3 targetPos = Camera.main.ScreenToWorldPoint(mousePos);						
				targetPos.y = (float)(transform.position.y + 1.3);
			
			
			
				Vector3 spawnPos = new Vector3((float)(transform.position.x), (float)(transform.position.y + 1.3), transform.position.z);
				GameObject abil = (GameObject)Instantiate(Resources.Load("fireball"), spawnPos, Quaternion.LookRotation(targetPos));
				abil.GetComponent<Fireball>().Ignore = "player";
				abil.transform.LookAt(targetPos);
				abil.rigidbody.AddForce(abil.transform.forward * ability.Speed);

This code only fires ‘north’, towards the top of the screen, but sort of loosely goes to the mouse position, but only within a restrictied cone from the player.

If I uncomment the first two lines in place of the third, I get different behaviour. The fireballs go southwards, loosely towards the mouse position, unless I go to the very top of the screen where it will begin to aim northwards.

Clearly I’ve got something wrong here. I did try something to do with creating a plane and raycasting, but that had similar effects the code shown.

Hope this is clear. Appreciate any replies.

[GeneralMidi]

I got it working. Incase anyone googles this and would like to try the code:

		       	Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
		       	RaycastHit Hit;
				Vector3 targetPos;
		 
				if (Physics.Raycast (ray, out Hit, 100)) 
				{
				
					if (Hit.collider.gameObject.tag == Tags.terrain) 
					{
						Debug.DrawRay (transform.position, transform.position, Color.red);
					}
				
				}
				targetPos = Hit.point;
				targetPos.y = (float)(transform.position.y + 1.3);
				targetPos.z -= 1;
			
				Vector3 spawnPos = new Vector3((float)(transform.position.x), (float)(transform.position.y + 1.3), transform.position.z);
				GameObject abil = (GameObject)Instantiate(Resources.Load("fireball"), spawnPos, Quaternion.LookRotation(targetPos));
				abil.GetComponent<Fireball>().Ignore = "player";
				abil.transform.LookAt(targetPos);
				abil.rigidbody.AddForce(abil.transform.forward * ability.Speed);