Camera Movement issue

Questions & Answers
1

hey guys. i have a camera movement c# script that follows the player and also has mouse orbit. however, the camera goes through the terrain and buildings and i want to fix that. here’s the script:

using UnityEngine;

using System.Collections;

public class CameraMovement : MonoBehaviour {
public Transform target;
public float walkDistance;
public float runDistance;
public float height;
public float xSpeed = 250.0f;
public float ySpeed = 120.0f;
public float heightDamping = 2.0f;
public float rotationDamping = 3.0f;

private Transform _myTransform;
private float _x;
private float _y;
private bool _camButtonDown = false;

void Awake() {
	_myTransform = transform;	
}

// Use this for initialization
void Start () {
	if(target == null)
		Debug.LogWarning("there is no target assigned to the camera");
	else {
		CameraSetUp();
	}

}

void Update() {
	if(Input.GetMouseButtonDown(1)) {   //Use the Input Manager to make this user selectable button
		_camButtonDown = true;
	}
	if(Input.GetMouseButtonUp(1)) {
		_camButtonDown = false;
	}
}

void LateUpdate() {

// _myTransform.position = new Vector3(target.position.x, target.position.y + height, target.position.z - walkDistance);
// _myTransform.LookAt(target);
if(target != null) {
if(_camButtonDown) {
_x += Input.GetAxis(“Mouse X”) * xSpeed * 0.02f;
_y -= Input.GetAxis(“Mouse Y”) * ySpeed * 0.02f;

// 			y = ClampAngle(y, yMinLimit, yMaxLimit);
 		

               
        	Quaternion rotation = Quaternion.Euler(_y, _x, 0);
        	Vector3 position = rotation * new Vector3(0.0f, 0.0f, -walkDistance) + target.position;
        
        	_myTransform.rotation = rotation;
        	_myTransform.position = position;
		}
		else {

// _myTransform.position = new Vector3(target.position.x, target.position.y + height, target.position.z - walkDistance);
// _myTransform.LookAt(target);
_x = 0;
_y = 0;

			// Calculate the current rotation angles
			float wantedRotationAngle = target.eulerAngles.y;
			float wantedHeight = target.position.y + height;
	
			float currentRotationAngle = _myTransform.eulerAngles.y;
			float currentHeight = _myTransform.position.y;

			// Damp the rotation around the y-axis
			currentRotationAngle = Mathf.LerpAngle(currentRotationAngle, wantedRotationAngle, rotationDamping * Time.deltaTime);

			// Damp the height
			currentHeight = Mathf.Lerp(currentHeight, wantedHeight, heightDamping * Time.deltaTime);

			// Convert the angle into a rotation
			Quaternion currentRotation = Quaternion.Euler(0, currentRotationAngle, 0);
	
			// Set the position of the camera on the x-z plane to:
			// distance meters behind the target
			_myTransform.position = target.position;
			_myTransform.position -= currentRotation * Vector3.forward * walkDistance;

			// Set the height of the camera
			_myTransform.position = new Vector3(_myTransform.position.x, currentHeight, _myTransform.position.z);

			// Always look at the target
			_myTransform.LookAt (target);			
		}		   
	
	}

}

public void CameraSetUp() {
	_myTransform.position = new Vector3(target.position.x, target.position.y + height, target.position.z - walkDistance);
	_myTransform.LookAt(target);	
}

}

i know its a long script, but maybe someone can give some code in c# that keeps the camera from going through the terrain. thanks.

2

Your basic task is to position the camera above the terrain at the point it is located. You can get the terrain height from the terrain object. To stop it intersecting buildings you need to ray cast from the camera and see if it hits something before your character - then if it does you either zoom in or move the camera in some other way. Check out the orbitcamera script on my blog.