I have this tracking project that I have worked on for a long time. Basically, the User moves a cube to trace the movements of a sphere which moves randomly. Currently, I am working with the User movements.
The issue is that the device that the user utilizes to move in all directions is a mouse in combination with the arrow keys. This is because the mouse handles two dimensions (x-y), while the arrow keys handle two dimensions (x-z). However, I would like to make it possible for me to just use the mouse.
As such, my professor suggested that I use the shift key to switch between x-y and x-z movements. However, I am confused as to how to go about this.
The code below represents what I have at this moment and what I have tried in regards to the shift key movements.
Could someone please help me solve this issue, or is there a better way to go about this?
Thank you!
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
[RequireComponent(typeof(MeshCollider))]
public class UserController : MonoBehaviour {
public int speed = 20;
// Use this for initialization
void Start()
{
}
// Update is called once per frame
void Update()
{
// get input data from keyboard or controller
float moveHorizontal = Input.GetAxis("Horizontal");
float moveVertical = Input.GetAxis("Vertical");
// update player position based on input
Vector3 position = transform.position;
position.x += moveHorizontal * speed * Time.deltaTime;
position.z += moveVertical * speed * Time.deltaTime;
transform.position = position;
}
void OnMouseDrag()
{
while(Input.GetMouseButton(0))
{
int shiftCalled = 0;
//3D Drag, courtesy of Unity Forums
if(Input.GetKey(KeyCode.LeftShift))
{
float distance_to_screen = Camera.main.WorldToScreenPoint(gameObject.transform.position).z;
transform.position = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, distance_to_screen));
}
//Plane Drag, courtesy of Unity Forums
if(Input.GetKey(KeyCode.RightShift))
{
float distance_to_screen = Camera.main.WorldToScreenPoint(gameObject.transform.position).z;
Vector3 pos_move = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, distance_to_screen));
transform.position = new Vector3(pos_move.x, transform.position.y, pos_move.z);
}
}
}
}
Here's what I would do -
Imagine a ray going from the position of the mouse on your screen towards a 2D plane that stretches on the X and Z angles. The intersection of said ray with the plane would be the X,Z coordinated that you wish your object to be dragged on.
Now imagine the same ray intersecting with a different plane that stretches on the X and Y coordinates. This will generate the other type of movement you are looking for.
By holding the SHIFT button you will essentially be swapping these two planes, which should generate the result you are looking for.
You can generate both planes in code using -
xy_Plane = new Plane(Vector3.forward, m_DistanceFromCamera);
xz_Plane = new Plane(Vector3.up, m_DistanceFromCamera);
Generate the rays using -
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
//Initialise the enter variable
float enter = 0.0f;
if (xy_Plane.Raycast(ray, out enter))
Vector3 hitPoint = ray.GetPoint(enter);
and check which plane should be used with -
if(Input.GetKey(KeyCode.Shift))
Now you only need to move your object based on the hitPoint you received.
Hope this helps.
Related
OBJECTIVE
I am using this script I got from Unity's forums to move my camera around. It works perfectly and this is exactly the style of camera I want. Here it is in action:
https://streamable.com/j7ozps
I wanted to create a zoom effect when the user holds the right mouse button.
PROBLEM
After zooming in, the aim is off by a lot. Here's what happens:
https://streamable.com/8aiil0
MY ATTEMPT
void Update () {
if (Input.GetMouseButton(1))
{
int layerMask = 1 << CombatManager.GROUND_LAYER; // -> public const int GROUND_LAYER = 8;
Ray mouseClick = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit[] hitInfos;
float maxDistance = 100.0f;
hitInfos = Physics.RaycastAll(mouseClick, maxDistance,
layerMask, QueryTriggerInteraction.Ignore);
mainCamera.fieldOfView = 10;
mainCamera.transform.LookAt(hitInfos[0].point);
}
else
mainCamera.fieldOfView = startingFieldOfView;
I also tried swapping the order of the LookAt and field of view assignment.
What am I doing wrong?
Seems that what you want is to zoom towards the cursor position, not towards where the ray hits which are likely not the same point. To check that out you can draw a debug cube where the ray hits, to check if the point you are looking at is the one you need, like so:
GameObject cube = GameObject.CreatePrimitive(PrimitiveType.Cube);
cube.transform.position = hitInfos[0].point;
Check Camera.ScreenToWorldPoint that gives you the worldspace point created by converting the screen space point at the provided distance z from the camera plane.
What I would try:
Vector3 point = Camera.main.ScreenToWorldPoint(Input.mousePosition);
//check if this is the point you want to look at
GameObject cube = GameObject.CreatePrimitive(PrimitiveType.Cube);
cube.transform.position = point;
//look at it
mainCamera.transform.LookAt(point);
It should not mind if you are using the cam.nearClipPlane or the cam.farClipPlane in the ScreenToWorldPoint function, but I would play with that in case something is not working as intended.
Vector3 screenPoint = Input.mousePosition;
screenPoint.z = Camera.main.farClipPlane;
Vector3 worldPoint = Camera.main.ScreenToWorldPoint(screenPoint);
I've been doing some research on why my player(GameObject) is does not rotate toward my mouse position in my TopDown 3D game and I can't seem to find what is wrong with my code, so im making this post. The problem thats I have is that only the GameObject of my player (in my case, a capsule) rotate toward my mouse position but the axis of my player stays the same. In other word, I can't rotate the axis of my player, to face my mouse position, but I can rotate the GameObject of my player to face my mouse position. Its really hard to explain and this never happened to me before. Question is how can I rotate the axis of my player to face my mouse position. Keep in mind that my game is a top down view.
Here is the code im using for my playerMouvment and for my mouseLook:
public class Controller : MonoBehaviour
{
public float moveSpeed = 6;
Rigidbody rb;
Camera viewCamera;
Vector3 velocity;
void Start()
{
rb = GetComponent<Rigidbody>();
viewCamera = Camera.main;
}
void Update()
{
Vector3 mousePos = viewCamera.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, viewCamera.transform.position.y));
transform.LookAt(mousePos + Vector3.up * transform.position.y);
velocity = new Vector3(Input.GetAxisRaw("Horizontal"), 0, Input.GetAxisRaw("Vertical")).normalized * moveSpeed;
}
void FixedUpdate()
{
rb.MovePosition(rb.position + velocity * Time.fixedDeltaTime);
}
}
Again I tried and look for any error in my code and I can't find anything that cause this weird situation and so if anyone can help me find a better way to write this code and solve my problem it would be great!
If I understand you correctly everything is fine with your game and the player is turning as it should, but only in the editor that the axis of the player (red, green and blue arrows) don't turn with the player?
If this is the problem it might be that you are using global space handle instead of local space. Clicking the icon I highlighted in the image should do the trick.
Use this code instead of LookAt() function
Vector2 direction = mousePos.position - player.transform.position;
player.transform.right /* Maybe you need Up or -Up or -right */ = direction;
This would work too in some cases
Vector2 direction = new Vector2
(
mousePos.position.x - player.transform.position.x,
mousePos.positoin.y - player.transform.position.y
)
player.transform.right /* Maybe you need Up or -Up or -right */ = direction;
I just started with unity and followed thair 2D UFO example project.
In an effort to extend it, I came up with a quirky way of contolling my Player.
It always moves in circular paths and once I click a button, the circle's direction changes and the imaginary circle center is tanslated as shown in the picture below. That allows you to move in a figure 8 or S shape pattern and is quite fun.
However, once I figured out how to do this motion, the player object did not have any collision detection anymore.
In the original example the whole movemet handling is done within FixedUpdate(). I, however, use Update() since the former does not seem to work at all with my code (i.e. no movement at all).
This is my code for the movement so far:
public class ControlledRotation : MonoBehaviour
{
public float radius = 3f;
public float speed = 3f;
private float timeCounter = 0;
private float direction = 1f;
private Vector3 offset;
private Rigidbody2D rb2d;
void Start()
{
offset = transform.position;
}
void Update()
{
if (Input.GetKeyDown(KeyCode.RightArrow))
{
//change the offset from the circle center and the rotation direction on keypress
offset += new Vector3(Mathf.Cos(timeCounter), Mathf.Sin(timeCounter), 0) * radius * direction * 2;
direction *= -1;
}
timeCounter += Time.deltaTime * direction * speed;
transform.position = new Vector3(Mathf.Cos(timeCounter), Mathf.Sin(timeCounter)) * radius * direction + offset;
}
}
The Plyer object has a Rigidbody 2D and a Circle Collider 2D. The walles it should collide with have Box Collider 2D. Yet, the UFO can simply pass the walls.
I assume a probable cause in the fact that I simply change transform.position or since im using Update/FixedUpdate wrong.
If you happen to have any advice on how I can keep my chosen movement control mechanism and still be able to collide with objects, I'd highly appreciate it :)
Edit:
I feel I need to go with using the rigidbody and applying some force... but I haven't figured out how to reproduce this movement with forces and also forces seem to not be super crisp in response
When you need to move an object that has a Rigidbody, you need to move it using forces, you cannot do it with just transform.position, it ignores physics. that's why you cannot detect the collision.. I suggest you move it like that. I have some examples when I had to move a character that needed to interact with physics.
gameObject.GetComponent<Rigidbody>().velocity = Vector3.zero;
And this one is for moving it in certain directions:
//Keys for controlling the player (move and shoot) only when he's alive
if (Input.GetKey(KeyCode.UpArrow) && alive)
{
GetComponent<Rigidbody>().MovePosition(transform.position + Vector3.forward * Time.deltaTime * 4);
}
if (Input.GetKey(KeyCode.DownArrow) && alive)
{
GetComponent<Rigidbody>().MovePosition(transform.position + Vector3.back * Time.deltaTime * 4);
}
I hope it helps.. greetings :)
NavmeshAgent player not parallel to slope of hill when moving over hill. On plane surface its going smoothly.
See Video
Below Image properties of navMesh and player
https://ibb.co/fijmoV
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;
public class SampleAgentScript : MonoBehaviour {
public Transform target ;
NavMeshAgent agent;
// private static bool start1=false , start2=false, start3;
// Use this for initialization
void Start()
{
agent = GetComponent<NavMeshAgent>();
}
void Update()
{
//if white button click moves to targer-1
agent.SetDestination(target.position);
}
}
I am not sure if NavmeshAgent is supposed to do that for you. This looks like something you're supposed to do manually.
You can correct the rotation of the character to match the slope by performing a raycast downwards and obtaining the normal of the hit point. After obtaining the normal of the hit point, you can then calculate the new rotation with that normal hit point. There are many ways to do that calculation but using Quaternion.FromToRotation and lerping the rotation with Quaternion.Lerp seems to work best.
Finally, make sure to the raycast is only done to Objects you considered as a "Hill" or "Ground". You can do this with the bitwise operation on the layer the "Hill" or "Ground" objects are placed on. The example below assumes that the Objects you consider as "Hill" or "Ground" are on a layer called "Hill".
//Reference of the moving GameObject that will be corrected
public GameObject movingObject;
//Offset postion from where the raycast is cast from
public Vector3 originOffset;
public float maxRayDist = 100f;
//The speed to apply the corrected slope angle
public float slopeRotChangeSpeed = 10f;
void Update()
{
//Get the object's position
Transform objTrans = movingObject.transform;
Vector3 origin = objTrans.position;
//Only register raycast consided as Hill(Can be any layer name)
int hillLayerIndex = LayerMask.NameToLayer("Hill");
//Calculate layermask to Raycast to.
int layerMask = (1 << hillLayerIndex);
RaycastHit slopeHit;
//Perform raycast from the object's position downwards
if (Physics.Raycast(origin + originOffset, Vector3.down, out slopeHit, maxRayDist, layerMask))
{
//Drawline to show the hit point
Debug.DrawLine(origin + originOffset, slopeHit.point, Color.red);
//Get slope angle from the raycast hit normal then calcuate new pos of the object
Quaternion newRot = Quaternion.FromToRotation(objTrans.up, slopeHit.normal)
* objTrans.rotation;
//Apply the rotation
objTrans.rotation = Quaternion.Lerp(objTrans.rotation, newRot,
Time.deltaTime * slopeRotChangeSpeed);
}
}
I have just started working on another project where one of the game mechanics is the ability to relocate a drone to the position of your mouse cursor.
Here is my code below where I have several problems(will specify)
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class lightDrone : MonoBehaviour
{
Vector3 newPosition;
void Start()
{
newPosition = transform.position + (0,0,10); //***Problem A***
}
void Update()
{
if (Input.GetMouseButtonDown(0))
{
RaycastHit hit;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out hit))
{
newPosition = hit.point;
transform.position = newPosition; // ***Problem B***
}
}
}
}
Problem A - I am trying to have the new position = wherever the cursorhas clicked + 10 on the y axis so the "Drone" is seemed to be flying and not in the ground. This isn't achieving anything and is just giving me compiling errors.
I want the exact position to be (cursor.x, (public int (y)), cursor.z) but I have a very vague idea to do it.
Problem B -
Currently when I click my mouse, the object moves to the cursor but it seems to be just teleporting instantly. I want it to move at a certain speed and I think I need a public float to do so and change transform.position to translate.position but this again doesn't work.
Thank you in advance for answering my questions, I am trying to learn these new mechanics and how to code them. :)
Problem A
If you want your new position to be where ever the cursor clicked + 10 on the y axis it makes no sense to put any of your code in Start(). That's for initialization only. It runs just once at the beginning of the scene. Just add the 10 to your newPosition in the Update() method.
Problem B
Setting transform.position to a certain value will make your transform instantly move to that position. If you want to do it over time you need to move your transform a few increments at a time. Since this introduces that "over time" element, you need to use a method that takes place over time, so you need coroutines, asyncs or you can use just the update method if you're a tiny bit crafty.
Also you need the ray to intersect and hit something. Like a flat plane, the ground, terrain, anything with a collider. If it doesn't hit anywhere then you won't have a new place to move to.
Code
using UnityEngine;
public class LightDrone : MonoBehaviour
{
public float speed = 60.0f;
// Our destination needs to be remembered outside a single iteration of
// Update. So we put it outside of the method in order to remember it
// across multiple frames.
private Vector3 currentDestination;
// We need to check if we're at the destination yet so we know when to stop.
private bool notAtDestinationYet;
// When we're closer to the destination than this tolerance, we decide that
// we have arrived there.
private float tolerance = 0.1f;
private void Update()
{
if (Input.GetMouseButtonDown(0))
{
RaycastHit hit;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out hit))
{
var newPosition = hit.point;
// You can add whatever height you want here. I added
// just 2 instead of 10.
currentDestination = newPosition + new Vector3(0, 2.0f, 0);
notAtDestinationYet = true;
}
}
if (notAtDestinationYet)
{
// Use a bit of vector math to get the direction from our current
// position to the destination. The direction is a normalized Vector
// that we can just multiply with our speed to go in that direction
// at that specific speed!
var heading = currentDestination - transform.position;
var distance = heading.magnitude;
var direction = heading / distance;
// Check if we've arrived at our destination.
if (distance < tolerance)
{
notAtDestinationYet = false;
}
else
{
// If the remaining distance between us and the destination is
// smaller than our speed, then we'll go further than necessary!
// This is called overshoot. So we need to make our speed
// smaller than the remaining distance.
// We also multiply by deltaTime to account for the variable
// amount of time that has passed since the last Update() call.
// Without multiplying with the amount of time that has passed
// our object's speed will increase or decrease when the
// framerate changes! We really don't want that.
float currentSpeed = Mathf.Clamp(speed * Time.deltaTime,
Mathf.Epsilon, distance);
transform.position += direction * currentSpeed;
}
}
}
}