Camera movement inputs have been set up in unity for a 3D game. The camera is being used to rotate, pan and zoom in/around an object. At the moment I can move out of sight of the object. Is there a way to block the camera from going out of sight of the object? I have seen multiple ways to keep an object in sight through the camera, however I am unsure which route to take.
I have attached the script being used below.
using UnityEngine;
using System.Collections;
public class RTSCam : MonoBehaviour {
private float dist;
private float orbitSpeedX;
private float orbitSpeedY;
private float zoomSpeed;
public float rotXSpeedModifier=0.25f;
public float rotYSpeedModifier=0.25f;
public float zoomSpeedModifier=5;
public float minRotX=-20;
public float maxRotX=70;
//public float minRotY=45;
//public float maxRotY=315;
public float minZoom=3;
public float maxZoom=15;
public float panSpeedModifier=1f;
// Use this for initialization
void Start () {
dist=transform.localPosition.z;
DemoSceneUI.SetSceneTitle("RTS camera, the camera will orbit around a pivot point but the rotation in z-axis is locked");
string instInfo="";
instInfo+="- swipe or drag on screen to rotate the camera\n";
instInfo+="- pinch or using mouse wheel to zoom in/out\n";
instInfo+="- swipe or drag on screen with 2 fingers to move around\n";
instInfo+="- single finger interaction can be simulate using left mosue button\n";
instInfo+="- two fingers interacion can be simulate using right mouse button";
DemoSceneUI.SetSceneInstruction(instInfo);
}
void OnEnable(){
IT_Gesture.onDraggingE += OnDragging;
IT_Gesture.onMFDraggingE += OnMFDragging;
IT_Gesture.onPinchE += OnPinch;
orbitSpeedX=0;
orbitSpeedY=0;
zoomSpeed=0;
}
void OnDisable(){
IT_Gesture.onDraggingE -= OnDragging;
IT_Gesture.onMFDraggingE -= OnMFDragging;
IT_Gesture.onPinchE -= OnPinch;
}
// Update is called once per frame
void Update () {
//get the current rotation
float x=transform.parent.rotation.eulerAngles.x;
float y=transform.parent.rotation.eulerAngles.y;
//make sure x is between -180 to 180 so we can clamp it propery later
if(x>180) x-=360;
//calculate the x and y rotation
//Quaternion rotationY=Quaternion.Euler(0, Mathf.Clamp(y+orbitSpeedY, minRotY, maxRotY), 0);
Quaternion rotationY=Quaternion.Euler(0, y+orbitSpeedY, 0);
Quaternion rotationX=Quaternion.Euler(Mathf.Clamp(x+orbitSpeedX, minRotX, maxRotX), 0, 0);
//apply the rotation
transform.parent.rotation=rotationY*rotationX;
//calculate the zoom and apply it
dist+=Time.deltaTime*zoomSpeed*0.01f;
dist=Mathf.Clamp(dist, -maxZoom, -minZoom);
transform.localPosition=new Vector3(0, 0, dist);
//reduce all the speed
orbitSpeedX*=(1-Time.deltaTime*12);
orbitSpeedY*=(1-Time.deltaTime*3);
zoomSpeed*=(1-Time.deltaTime*4);
//use mouse scroll wheel to simulate pinch, sorry I sort of cheated here
zoomSpeed+=Input.GetAxis("Mouse ScrollWheel")*500*zoomSpeedModifier;
}
//called when one finger drag are detected
void OnDragging(DragInfo dragInfo){
//if the drag is perform using mouse2, use it as a two finger drag
if(dragInfo.isMouse && dragInfo.index==1) OnMFDragging(dragInfo);
//else perform normal orbiting
else{
//apply the DPI scaling
dragInfo.delta/=IT_Gesture.GetDPIFactor();
//vertical movement is corresponded to rotation in x-axis
orbitSpeedX=-dragInfo.delta.y*rotXSpeedModifier;
//horizontal movement is corresponded to rotation in y-axis
orbitSpeedY=dragInfo.delta.x*rotYSpeedModifier;
}
}
//called when pinch is detected
void OnPinch(PinchInfo pinfo){
zoomSpeed-=pinfo.magnitude*zoomSpeedModifier/IT_Gesture.GetDPIFactor();
}
//called when a dual finger or a right mouse drag is detected
void OnMFDragging(DragInfo dragInfo){
//apply the DPI scaling
dragInfo.delta/=IT_Gesture.GetDPIFactor();
//make a new direction, pointing horizontally at the direction of the camera y-rotation
Quaternion direction=Quaternion.Euler(0, transform.parent.rotation.eulerAngles.y, 0);
//calculate forward movement based on vertical input
Vector3 moveDirZ=transform.parent.InverseTransformDirection(direction*Vector3.forward*-dragInfo.delta.y);
//calculate sideway movement base on horizontal input
Vector3 moveDirX=transform.parent.InverseTransformDirection(direction*Vector3.right*-dragInfo.delta.x);
//move the cmera
transform.parent.Translate(moveDirZ * panSpeedModifier * Time.deltaTime);
transform.parent.Translate(moveDirX * panSpeedModifier * Time.deltaTime);
}
//for the camera to auto rotate and focus on a predefined position
/*
public float targetRotX;
public float targetRotY;
public float targetRotZ;
public Vector3 targetPos;
public float targetZoom;
IEnumerator LerpToPoint(){
Quaternion startRot=transform.parent.rotation;
Quaternion endRot=Quaternion.Euler(targetRotX, targetRotY, targetRotZ);
Vector3 startPos=transform.parent.position;
Vector3 startZoom=transform.localPosition;
float duration=0;
while(duration<1){
transform.parent.rotation=Quaternion.Lerp(startRot, endRot, duration);
transform.parent.position=Vector3.Lerp(startPos, targetPos, duration);
transform.localPosition=Vector3.Lerp(startZoom, new Vector3(0, 0, -targetZoom), duration);
duration+=Time.deltaTime;
yield return null;
}
transform.parent.rotation=endRot;
transform.parent.position=targetPos;
transform.localPosition=new Vector3(0, 0, -targetZoom);
}
*/
/*
private bool instruction=false;
void OnGUI(){
string title="RTS camera, the camera will orbit around a pivot point but the rotation in z-axis is locked.";
GUI.Label(new Rect(150, 10, 400, 60), title);
if(!instruction){
if(GUI.Button(new Rect(10, 55, 130, 35), "Instruction On")){
instruction=true;
}
}
else{
if(GUI.Button(new Rect(10, 55, 130, 35), "Instruction Off")){
instruction=false;
}
GUI.Box(new Rect(10, 100, 400, 100), "");
string instInfo="";
instInfo+="- swipe or drag on screen to rotate the camera\n";
instInfo+="- pinch or using mouse wheel to zoom in/out\n";
instInfo+="- swipe or drag on screen with 2 fingers to move around\n";
instInfo+="- single finger interaction can be simulate using left mosue button\n";
instInfo+="- two fingers interacion can be simulate using right mouse button";
GUI.Label(new Rect(15, 105, 390, 90), instInfo);
}
}
*/
}
Developer
