Teleporting inside walls!

I have initially tried getting help on Reddit and discord servers to no avail although many have tried. So this is my last ditch effort.

I am trying to make a dash of sorts for my character in a top down 2d style.
I am using a Rigidbody2D with the body type Kinematic.

private void OnDash(InputAction.CallbackContext context)
{
Vector2 dashPos = rb.position + movement * dashDistance;
RaycastHit2D dashCheck = Physics2D.Raycast(rb.position, movement, dashDistance, dashLayerMask);
Debug.DrawRay(rb.position, movement * dashDistance, Color.red, 5f);
if(dashCheck.collider != null)
{
dashPos = dashCheck.point;
Debug.Log("Something hit.");
Debug.DrawLine(rb.position, dashCheck.point, Color.green, 10f);
}
rb.position = dashPos;
Debug.Log("Nothing hit.");
Debug.Log(dashPos);
}

this function works as intended when NOT colliding with walls. When I try to dash at a wall, it teleports my 50% of my character into the wall.
I know this is happening because I am setting my rb.position to dashCheck.point using the center of my character. But what I am trying to figure out is how to set an offset of some sort that is the distance of half of my character if not a tad more to the dashCheck.point so that half my character doesn't go into the wall.

I have tried a ton of things such as seeing if there was a way to send a raycast back towards the direction that the first raycast was sent, and then just have the distance be half the length of my character. But this resulted in me teleporting randomly around. But nothing has worked.

Can anyone help?
Hope I explained my issue correctly here.

Full Controller script:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.InputSystem;
5.  
6. public class PlayerController : MonoBehaviour
7. {
8.     //Input Action Map
9.     PlayerActionMaps playerActionMaps; InputAction movementInput;
10.  
11.     //Player Related
12.     Vector2 movement; float moveSpeed = 5f; Rigidbody2D rb; float dashDistance = 5f;
13.  
14.     //Cast Related
15.     [SerializeField] private LayerMask dashLayerMask, moveLayerMask;
16.     ContactFilter2D contactFilter; List<RaycastHit2D> hitResults = new List<RaycastHit2D>(); float collisionOffset = 0.1f;
17.  
18.     private void Awake()
19.     {
20.         playerActionMaps = new PlayerActionMaps();
21.         rb = GetComponent<Rigidbody2D>();
22.         contactFilter.layerMask = moveLayerMask;
23.     }
24.  
25.     private void OnEnable()
26.     {
27.         playerActionMaps.Gameplay.Enable();
28.         movementInput = playerActionMaps.Gameplay.Movement;
29.         movementInput.performed += OnMove;
30.         movementInput.canceled += OnMove;
31.         playerActionMaps.Gameplay.Dash.performed += OnDash;
32.     }
33.  
34.     private void OnMove(InputAction.CallbackContext context)
35.     {
36.         movement = context.ReadValue<Vector2>();
37.     }
38.  
39.     private void FixedUpdate()
40.     {
41.         if (movement != Vector2.zero)
42.         {
43.             bool success = TryMove(movement);
44.             if (!success)
45.             {
46.                 success = TryMove(new Vector2(movement.x, 0));
47.                 if (!success)
48.                 {
49.                     success = TryMove(new Vector2(0, movement.y));
50.                 }
51.             }
52.         }
53.     }
54.  
55.     private bool TryMove(Vector2 movement)
56.     {
57.         int hitCount = rb.Cast
58.             (movement,
59.             contactFilter,
60.             hitResults,
61.             collisionOffset);
62.         if (hitCount == 0)
63.         {
64.             rb.MovePosition(rb.position + movement * moveSpeed * Time.fixedDeltaTime);
65.             return true;
66.         }
67.         else return false;
68.     }
69.  
70.     private void OnDash(InputAction.CallbackContext context)
71.     {
72.         Vector2 dashPos = rb.position + movement * dashDistance;
73.         RaycastHit2D dashCheck = Physics2D.Raycast(rb.position, movement, dashDistance, dashLayerMask);
74.         Debug.DrawRay(rb.position, movement * dashDistance, Color.red, 5f);
75.         if(dashCheck.collider != null)
76.         {
77.             dashPos = dashCheck.point;
78.             Debug.Log("Something hit.");
79.             Debug.DrawLine(rb.position, dashCheck.point, Color.green, 10f);
80.         }
81.         rb.position = dashPos;
82.         Debug.Log("Nothing hit.");
83.         Debug.Log(dashPos);
84.     }
85. }

 

I don't get how I would use rb.cast to dash/teleport my character though. And I was afraid that spending time to figure this out would result in the same issue of my character getting stuck in the wall. Since I think I could get it to maybe dash my character. But how would I detect if I had hit a wall on my dash and then to teleport me to said wall. But not in the wall.

 

Okay, so after messing around trying to figure it out. I can't get the character to teleport to the object that I am colliding with in the cast without teleporting into the wall. And when I try to set an offset it just causes my dash not to work at all only moving me a smidge.

 

Dash can be handled a bit simpler than this.

When a successful "dash" is started:
- set either a timer or a distance counter to the desired time or distance of the dash.
- observe the last commanded move direction (call this the "dash direction")

Each update / fixed upate, when dash is active:
- possibly play a different animation (blur, tumble, etc)
- disable directional control and use the dash direction.
- increase speed of player movement
- always move the player in the same way (same code) as when not dashing
- when they hit an obstacle, cancel dash
- when the time (or distance) reaches zero, finish dash (perhaps restore animation state)

 

No, like. I get that, but I still have the same issue of it teleporting my character 50% in the wall or it just does little tiny dashes that still cause me to get stuck in walls anyways.

 

If you look at my script, I am able to use cast to move around as well. And it works perfect. I don't end up in walls or anything. The only thing I had to do was add an offset depending on my speed, because sometimes if my speed shot up i'd get stuck in the wall ever so slightly.
What I can't figure out no matter how hard I try is how to use the rb2d.cast to essentially teleport my character(dash) to a location without getting stuck in a wall. Say my dash is 50 steps, I dash 50 steps. That works. But now if I am looking at a wall that is 30 steps away, I don't want to dash the full 50 steps since it will teleport me on the other side of the wall. So using either a raycast or rb.cast I tried detecting the wall and setting that as the point at which I teleport too.
It is preventing me from being able to dash through the wall, but as a result I get stuck 50% into the wall. What I have been banging my head trying to figure out is how to use my rb.cast or raycast, get the point of contact with the collider and then set it back the width of my character. I can do the first parts, but I don't know how to set it back or set an offset.
All my attempts at setting an offset result it all sorts of messy movement that I don't want.
There probably is some simple way of doing this, but I have been using Unity for less than a month and I've been learning C# for the same amount of time. And Asides from a few Udemy courses and YouTube tutorials, i've been browsing Unity API and kind of just feeling my way through things.

 

I have already tried using RB2D.Cast just like I have for my movement for my dash and found no success. It resulted in the exact same issue.
Although I do appreciate your help, don't get agitated saying I am not reading what you have said.
I have tried implementing what you have said.
Like I have said above I have tried using the rigidbody2d.cast as well as raycasthit2d.point/centroid all to no avail. People keep telling me all sorts of "fixes" for this issue. But when I try to implement any of them, none work. Or the require me to use a Dynamic body type. Or requires doing a bunch of work around stuff that I don't understand and no one uses terms I can search in the Unity API. People just say "Oh, you teleport to the position and just go back a few steps" which is exactly what I want to do, and I know it's what I have to do, but it's not help at all from people saying this because I don't know how to do it.
I've been trying to get this to work for almost a week now and it still will not work.

 

I wasn't assuming that RB2D.cast doesn't work. What I am saying is, while using it, I don't know how to set an offset. I am getting identical results to when I use Raycasthit2D.
And I am not trying to restate stuff, but what I am restating is still my issue. I don't know how to set an offset to the point at which I am grabbing. I can detect the wall. I can get the point of detection. I don't know how to set an offset though, since when I try it acts all weird. But even me saying this here is restating. But I don't know what else to say.

 

Here is what I end up with.

The triangle is something I want to be able to dash through, and not detect. The square is something i don't want to dash through and detect. I know why I get stuck in the wall, I just don't know how to fix it.

 

"Cast, get the distance, move only that distance" "The distance is how far you can move." This makes no sense to me.
How do I grab the distance? And when I have the distance and I set my rb.position to that distance. How do I make sure it doesn't teleport me into the wall? Also when getting the distance, how do I even use the distance?

 

I have looked at the RaycastHit2D.distance API before. And when using rb.position = rb.position + direction * raycasthit2d.distance it still sticks me 50% into the wall. What I am trying to figure out is how to set an offset that works.

 

So the issue of why it wasn't working for me is because i was using my collisionOffset instead of my moveSpeed.
While it is now pretty much working... I still seem to clip into the wall just enough to get stuck. It's like 1 pixel. How can I fix this?