On Finger Touch and Drag Rotate 3D Ball - Unity 3D - unity3d

My 3d ball was moving continuously in the forward direction so I want to give X-rotation for this plus game player was dragging ball horizontally on the screen so for this horizontal movement, I want to give Z-rotation.
To achieve my desire, the result I have made ball parent and child game objects, where parent game object only contains collider and rigidbody and this will do the actual physical movement.
Another side, child game object only contains mesh renderer, this will do desire rotation.
Following image gives you more idea about my structure:
Ball Parent:
Ball Child:
For giving rotation to ball mesh as like parent physics ball, I have written this code:
public class BallMeshRolling : MonoBehaviour
{
private Vector3 ballLastPosition;
void Start ()
{
ballLastPosition = transform.parent.position;
}
void Update ()
{
//implementation-1
//float speed = Vector3.Distance (transform.parent.position, ballLastPosition) * 30f;
//transform.RotateAround (transform.position, Vector3.right, speed);
//implementation-2
//Vector3 differenceInPosition = (transform.parent.position - ballLastPosition).normalized;
//transform.Rotate (differenceInPosition * 10f);
//implementation-3
Vector3 differenceInPosition = (transform.parent.position - ballLastPosition).normalized * 50f;
Quaternion rotation = Quaternion.LookRotation(differenceInPosition);
transform.rotation = rotation;
ballLastPosition = transform.parent.position;
}
}
But none of the above ways working properly, so I expect some other better suggestions from your side.
EDIT: Overall I am trying to achieve something like this:
Catch up - Ketchapp - Highscore 1274

There is a tutorial series from Unity about rolling and moving a 3d ball that can help you to figure out the basics for your problem. Wish it could help.
Roll-a-ball tutorial in Unity Tutorials

Related

Unity / Mirror - Is there a way to keep my camera independent from the player object's prefab after start?

I'm currently trying to create a multiplayer game using mirror!
So far I've been successful in creating a lobby and set up a simple character model with a player locomotion script I've taken and learnt inside out from Sebastian Graves on YouTube (you may know him as the dark souls III tutorial guy)
This player locomotion script uses unity's package 'Input System' and is also dependent on using the camera's .forward and .right directions to determine where the player moves and rotates instead of using forces on the rigidbody. This means you actually need the camera free in the scene and unparented from the player.
Here is my HandleRotation() function for rotating my character (not the camera's rotation function):
private void HandleRotation()
{
// target direction is the way we want our player to rotate and move // setting it to 0
Vector3 targetDirection = Vector3.zero;
targetDirection = cameraManager.cameraTransform.forward * inputHandler.verticalInput;
targetDirection += cameraManager.cameraTransform.right * inputHandler.horizontalInput;
targetDirection.Normalize();
targetDirection.y = 0;
if (targetDirection == Vector3.zero)
{
// keep our rotation facing the way we stopped
targetDirection = transform.forward;
}
// Quaternion's are used to calculate rotations
// Look towards our target direction
Quaternion targetRotation = Quaternion.LookRotation(targetDirection);
// Slerp = rotation between current rotation and target rotation by the speed you want to rotate * constant time regardless of framerates
Quaternion playerRotation = Quaternion.Slerp(transform.rotation, targetRotation, rotationSpeed * Time.deltaTime);
transform.rotation = playerRotation;
}
It's also worth mentioning I'm not using cinemachine however I'm open to learning cinemachine as it may be beneficial in the future.
However, from what I've learnt and managed to find about mirror is that you have to parent the Main Camera under your player object's prefab so that when multiple people load in, multiple camera's are created. This has to happen on a Start() function or similar like OnStartLocalPlayer().
public override void OnStartLocalPlayer()
{
if (mainCam != null)
{
// configure and make camera a child of player
mainCam.orthographic = false;
mainCam.transform.SetParent(cameraPivotTransform);
mainCam.transform.localPosition = new Vector3(0f, 0f, -3f);
mainCam.transform.localEulerAngles = new Vector3(0f, 0f, 0f);
cameraTransform = GetComponentInChildren<Camera>().transform;
defaultPosition = cameraTransform.localPosition.z;
}
}
But of course, that means that the camera is no longer independent to the player and so what ends up happening is the camera rotates when the player rotates.
E.g. if I'm in game and looking to the right of my player model and then press 'w' to walk in the direction the camera is facing, my camera will spin with the player keeping the same rotation while my player spins in order to try and walk in the direction the camera is facing.
What my question here would be: Is there a way to create a system using mirror that doesn't require the camera to be parented to the player object prefab on start, and INSTEAD works by keeping it independent in the scene?
(I understand that using forces on a rigidbody is another method of creating a player locomotion script however I would like to avoid that if possible)
If anybody can help that would be greatly appreciated, Thank You! =]
With the constraint of your camera being attached to the player you will have to adapt the camera logic. What you can do is instantiate a proxy transform for the camera and copy that transforms properties to your camera, globally, every frame. The parent constraint component might do this for you. Then do all your transformations on that proxy.
Camera script with instantiation:
Transform proxy;
void Start(){
proxy = (new GameObject()).transform;
}
void Update(){
//transformations on proxy
transform.position = proxy.position;
transform.rotation = proxy.rotation;
}

Detect collisions between 2 objects

I'm trying to do a little game on mobile using Unity and I've got a problem with the rotation of a maze.
To add context :
When your moving your finger on the screen, the maze is rotating on himself. There is a ball in it and you need to make it go on a cell to win the level.
When the maze is rotating too fast, the ball falls down and go through the ground and I don't know how to fix it.
I tried to play with the gravity, colliders...
This is the same when the ball is jumping (when the maze is going up and down quickly).
For the moment I just reset the ball position when you're falling.
{
ball.transform.position = new Vector3(0, 2, 0);
maze.transform.position = Vector3.zero;
maze.transform.rotation = Quaternion.identity;
}
Do you guys have some ideas ? Thanks
I had a similar problem in a tilt maze mini-game I worked on. Ideally implementing jkimishere's solution will work but I assume the maze is moving too fast for the collisions to register properly. You'll need to smooth the maze's rotation with a Lerp. In our case we had pressure plates with a tilt value, so it doesn't directly translate to your mobile use but perhaps give you a nudge in the right direction. We used:
public GameObject maze;
private float _lerpTime;
private bool _isRotating;
private Quaternion _startingRot, _desiredRot;
private void Awake()
{
_startingRot = maze.transform.localRotation;
}
private void Update()
{
//Don't want to move the maze if we don't ask for it
if(!_isRotating)
return;
//Lerp the maze's rotation
_lerpTime = Mathf.Clamp(_lerpTime + Time.deltaTime * 0.5f, 0f, 1f);
maze.transform.localRotation = Quaternion.Lerp(_startingRot, _desiredRot, _lerpTime);
//Once the maze gets where it needs to be, stop moving it
if(affectedObject.transform.localRotation.Equals(_desiredRot)
_isRotating = false;
}
private void ActivateTilt()
{
//Set the new starting point of the rotation.
_startingRot = maze.transform.localRotation;
//However you want to calculate the desired rotation here
//Reset our lerp and start rotating again
_lerpTime = 0f;
_isRotating = true;
}
This will ease the rotation of your maze over time. So that the ball can adapt to the new collider positions.
In the rigidbody(for the ball), make the collision detection to continuous, and in the rigidbody for the maze(if you have one) set the collision detection to continuous dynamic. Hope this helps!
I think that is unavoidable if you allow the player to move the platform freely. I suggest you restrain the speed at wich the player can tilt the platform. This way, the ball will have more frames to adapt to the new slope

Circle Collider Slides on Box Collider when Velocity is slowing down?

I am trying to create a carrom 2D game for learning, i added box colliders 2D all sides and for striker circle collider 2D, and set physics material for all as friction 0 and bounciness 1. and Linear Drag to 1 for stiker.
It all works fine when velocity of impact of striker with sides but velocity is slow its dragging on slides instead of bouncing. where am i doing it wrong?
I am not sure what the problem is but seems like something to do with how the engine is resolving the physics. Try resolving the collision for the individual carrom tokens manually when they hit a surface instead of relying on physics material.
Here is a simple 2D example:
using UnityEngine;
[RequireComponent(typeof(Rigidbody2D))]
public class ReflectingObject : MonoBehaviour {
[Range(0f, 1f)]
public float bounciness = 1;
private Rigidbody2D m_Rb;
void Awake() {
m_Rb = GetComponent<Rigidbody2D>();
}
void OnCollisionEnter2D(Collision2D col) {
if(col.contactCount > 0) {
// Get the collision contact point
ContactPoint2D point = col.contacts[0];
// Get the current speed of this object
float speed = m_Rb.velocity.magnitude;
// Get the direction where this object is heading to
Vector2 oldDirection = (Vector2)m_Rb.velocity.normalized;
// Get the reflected direction
Vector2 newDirection = Vector2.Reflect(oldDirection, point.normal).normalized;
// Calculate new velocity based on bounciness
Vector2 newVelocity = newDirection * speed * bounciness;
// Assign the velocity
m_Rb.velocity = newVelocity;
}
}
}
Something like this.
Assign this Component to the objects which you want to reflect on collision.

Smooth Camera Follow with Voxel Based Sphere

I am very new to Unity and just got done yesterday following the Roller Ball example on the learn page here at Unity3d.
To practice what I have learned I wanted to try and recreate something similar using my own art and making the game different. I have been playing around with Voxel Art and I am using MagicaVoxel to create my assests. I created the walls, the ground etc.. and all is well.
Then came the player object, the sphere. I created one as close to a sphere as possible with magicaVoxel and it rolls fine. However, when using a script to have the camera follow the object it runs into issues.
If I don't constrain the Y axis then I will get bouncing and as far as the x and z axis I get kind of a Flat Tire effect. Basically the camera doesn't follow smoothly it bounces around, stop go etc...
I have tried making the collider larger then the sphere and even using the position of the collider vs the object itself. I have also tried putting the code in Update / FixedUpdate / LateUpdate. What is the proper way to fix or address something like this? Here is my scripts below:
Camera Controller:
public class CamController : MonoBehaviour {
public GameObject player;
private Vector3 offset;
void Start ()
{
// Get the distance between the player ball and camera.
offset = this.transform.position - player.transform.position;
}
void LateUpdate ()
{
this.transform.position = player.transform.position + offset;
}
}
Player Controller:
public class PlayerController : MonoBehaviour {
public float _speed;
void FixedUpdate()
{
// Get input from keyboard.
float _hoz = Input.GetAxis("Horizontal");
float _ver = Input.GetAxis("Vertical");
// Create a vector3 based on input from keyboard.
Vector3 _move = new Vector3(_hoz, 0.0f, _ver);
// Apply force to the voxel ball
this.GetComponent<Rigidbody>().AddForce(_move * _speed);
}
}
Thanks for any help in advance.
You can use the SmoothFollow Script of Unity it self for getting smooth follow of camera.
Here are the steps how you can get the script:
1) Assets->Import Package->Scripts.
2) At the dialog that appears select all the scripts, or just the smooth follow one and hit Import button.
3) Now this script is in your project, and you can attach it to the camera.
Hope this will help you...
Best,
Hardik.

How to drag a cube in orthographic camera in Unity 3d?

I am trying to create a isometric game like clash of clans. I created a Terrain and I set my camera position to (0,300,-10) and Rotation to (40,45,0) and Perspective to Orthographic. I am using below code to drag a cube but when i drag the cube at some position cube is not able to visible or only some portion of cube is visible. It seems like position (X,Y,Z) all three are changing using below code. But i want to drag cube just like any top down game like Clash of Clans. Please help me to resolve my issue.
void OnMouseDrag ()
{
Vector3 mousePosition = new Vector3 (Input.mousePosition.x, Input.mousePosition.y, 0);
Vector3 objPosition = Camera.main.ScreenToWorldPoint (mousePosition);
this.target.transform.position = objPosition;
}
You need raycasting to solve it. Try this-
void OnMouseDrag ()
{
RaycastHit hitInfo;
bool hit = Physics.Raycast (Camera.main.ScreenPointToRay (Input.mousePosition), out hitInfo, Mathf.Infinity, 1 << LayerMask.NameToLayer ("ground"));
if(hit){
this.target.transform.position = hitInfo.point;
}
}
You can use your existing ground or surface or on whatever your object will move, change the layer name to ground. Be aware that the ground must have a collider.