vector stuff idk please help I wanna die | Official Unity Discord | Page 1

cinder bolt May 21, 2022, 3:08 PM

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everythings broken

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Anyone? Please?

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I've literally spent a whole day working on this shitty thing that should've been done in an hour

ebon sphinx May 21, 2022, 3:22 PM

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float angle2 = Vector3.Angle(forward, -cam.transform.rotation.eulerAngles);
looks like a strange line to me

cinder bolt May 21, 2022, 3:23 PM

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It's the angle between the ohhh wait

ebon sphinx May 21, 2022, 3:23 PM

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might help posting some visual screenshots of what you're trying to do and what isn't working with it

cinder bolt May 21, 2022, 3:24 PM

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It's hard to screenshot

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I want to record it though apparently my record thing is broken

cinder bolt May 21, 2022, 3:26 PM

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ebon sphinx might help posting some visual screenshots of what you're trying to do and what ...

ok it fixed itself

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When I look past a certain angle, the vectors just stop

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they just give up

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why?!

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Secondly, my camera, when going up, is at a negative rotation. When looking down it's at a positive rotation. That's why I added -

cinder bolt May 21, 2022, 3:28 PM

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ebon sphinx `float angle2 = Vector3.Angle(forward, -cam.transform.rotation.eulerAngles);` lo...

Here I get the angle between the purple line (forward vector) and camera

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I guess I'm just going to completely redo this

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gtg now for ~30 min

ebon sphinx May 21, 2022, 3:37 PM

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I'm a bit busy to look through this in detail at the moment but I'd suggest splitting up the code for the rotation of the camera from the height of the object - they are separate axis

cinder bolt May 21, 2022, 3:37 PM

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I want to use different maths for this to make it easier

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Blue is the distance from the player to object. Red is the camera view. Light Blue is an upwards vector.

ebon sphinx May 21, 2022, 3:40 PM

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the x-z position is basically a freebie from the camera to begin with, just use the y rotation of the camera and forward direction of the camera
then, separately, the height can be calculated from the rotation about a vector pointing left/right

cinder bolt May 21, 2022, 3:40 PM

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cinder bolt Blue is the distance from the player to object. Red is the camera view. Light Bl...

I can then use a bit of trigonometry to calculate every side, and then I have what I need

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gtg now brb

wind vault May 21, 2022, 4:00 PM

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//Assuming your reusing a plane and ray
var direction = transform.forward;
direction.y = 0f;
plane.SetNormalAndPosition(direction, item.position);
ray.origin = transform.position;
ray.direction = transform.forward;
if(plane.Raycast(ray, out float distance))
{
    item.position = ray.GetPoint(distance);
}

cinder bolt May 21, 2022, 4:02 PM

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Ok Im back

wind vault May 21, 2022, 4:02 PM

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(Mobile discord coding should work but possible typos)

cinder bolt May 21, 2022, 4:02 PM

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wind vault ```cs //Assuming your reusing a plane and ray var direction = transform.forward;...

Yeah someone told me about plane raycasting before but it made me wanna jump of a building

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How do I calculate angle alpha though?

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I have the camera angle, though that is 0 degrees on the horizontal axis here

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starting at the viewpoint

wind vault May 21, 2022, 4:08 PM

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Well, you've got two vectors. (0, 1, 0) and your forward.

cinder bolt May 21, 2022, 4:08 PM

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(0, 1, 0)?

next harness May 21, 2022, 4:09 PM

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if I understand this right you only want to know the light blue line? because that one is really, really simple

wind vault May 21, 2022, 4:09 PM

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You'd be able to use this to get the commentary angle https://docs.unity3d.com/ScriptReference/Vector3.Angle.html

cinder bolt May 21, 2022, 4:09 PM

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next harness if I understand this right you only want to know the light blue line? because th...

No

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I know the blue line

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I need the light blue line

next harness May 21, 2022, 4:09 PM

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thats what I asked, read again

cinder bolt May 21, 2022, 4:10 PM

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You said blue line

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Not light blue line

wind vault May 21, 2022, 4:10 PM

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wind vault ```cs //Assuming your reusing a plane and ray var direction = transform.forward;...

distance is the length of the blue line..

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What're you attempting to make me solve...?

cinder bolt May 21, 2022, 4:10 PM

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The light blue line

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you know what

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let me change the colours

next harness May 21, 2022, 4:10 PM

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next harness if I understand this right you only want to know the light blue line? because th...

cinder bolt May 21, 2022, 4:11 PM

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Ok now it's green

cinder bolt May 21, 2022, 4:11 PM

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next harness

ok yeah Im blind

next harness May 21, 2022, 4:11 PM

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so the green line now, yeah really simple

cinder bolt May 21, 2022, 4:11 PM

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So how?

wind vault May 21, 2022, 4:12 PM

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You can solve any of those lines if you apply the plane algorithm above.. where the line is your transform.forward

cinder bolt May 21, 2022, 4:12 PM

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Yes but I don't understand how the plane algorithm works and how to implement it

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Which is why Im using trigonometry instead, because at least I know how that works

wind vault May 21, 2022, 4:12 PM

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cinder bolt Yes but I don't understand how the plane algorithm works and how to implement it

I gave you the exact code...

next harness May 21, 2022, 4:12 PM

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cinder bolt May 21, 2022, 4:12 PM

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wind vault I gave you the exact code...

Just because you give me a piece of code doesn't mean I know how it works

next harness May 21, 2022, 4:12 PM

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thats what you want?

cinder bolt May 21, 2022, 4:13 PM

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next harness

Almost. It should only change on the y-axis. The player should be able to move around it

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Basically, the object is locked on the y-axis

next harness May 21, 2022, 4:14 PM

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cinder bolt May 21, 2022, 4:14 PM

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Yes. exactly that

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That's the thing I've wasted the past 10 hours on and still haven't fixed

next harness May 21, 2022, 4:15 PM

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using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlacementTest : MonoBehaviour {
    
    public GameObject testObject;

    private void Update() {
        if (Input.GetMouseButton(0)) {
            float d = Vector3.Distance(testObject.transform.position, this.transform.position);
            Vector3 t = this.transform.forward * d;
            Vector3 c = testObject.transform.position;
            c.y = (this.transform.position + t).y;
            testObject.transform.position = c;
            
            return;
        }
        if (Physics.Raycast(this.transform.position, this.transform.forward, out RaycastHit hit, 100f)) {
            testObject.transform.position = hit.point;
        }
    }
}

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the script is attached to the camera

cinder bolt May 21, 2022, 4:16 PM

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Let me try it

wind vault May 21, 2022, 4:16 PM

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Issue would be that's a spherical carrying motion rather than planar.

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He didn't want it to come forward as the object rose to the ceiling.

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ie distance will change

cinder bolt May 21, 2022, 4:18 PM

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uhh when I try this the object gets closer towards me, and it doesn't move up and down

next harness May 21, 2022, 4:18 PM

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hold the mouse button

cinder bolt May 21, 2022, 4:19 PM

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ohh hold on

next harness May 21, 2022, 4:19 PM

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also the object I tested had no collider

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yours have one and is raycasting against itself

cinder bolt May 21, 2022, 4:20 PM

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Oh man it almost works. How do I prevent it from going towards myself though?

next harness May 21, 2022, 4:20 PM

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remove the collider or modify the raycast in the script to ignore it

cinder bolt May 21, 2022, 4:24 PM

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I'm implementing this with a grid placement system, so it glitches out a bit. @next harness ```
public void ShowPreview(RaycastHit hit2)
{
if (!Input.GetKey(KeyCode.LeftShift))
{
pos = hit2.point;
pos -= Vector3.one * offset;
pos.x /= gridSize;
pos.z /= gridSize;
pos.y /= gridSize / 3;
pos = new Vector3(Mathf.Round(pos.x), Mathf.Round(pos.y), Mathf.Round(pos.z));
pos.x *= gridSize;
pos.z *= gridSize;
pos.y *= gridSize / 3;
pos += Vector3.one * offset;
currentpreview.position = pos;
}
else
{
float d = Vector3.Distance(currentpreview.transform.position, cam.transform.position);
Vector3 t = cam.transform.forward * d;
Vector3 c = currentpreview.transform.position;
c.y = (cam.transform.position + t).y;
currentpreview.transform.position = c;

        return;
    }
    if (Physics.Raycast(cam.transform.position, cam.transform.forward, out RaycastHit hit, 100f))
    {
        if(!hit.collider.CompareTag("building"))
            currentpreview.transform.position = hit.point;
    }

}```

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Can I just put the raycast inside the else?

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next harness May 21, 2022, 4:26 PM

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I don't think you need the raycast after all

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I only used it for testing to put the object into position

cinder bolt May 21, 2022, 4:29 PM

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👍 oh alright awesome

cinder bolt May 21, 2022, 4:31 PM

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next harness I only used it for testing to put the object into position

And why does it limit how far it can go?

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uhhh the closer I am to the object, the higher I can move it. If I'm far away I can't move it up and down at all. @next harness

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But questions aside, where were you all day? I really needed you 10 hours ago lol. Thanks so much for your help I seriously appreciate it a lot! If you hadn't given me this answer I would've been crying for the coming hours

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UnityChanwow

next harness May 21, 2022, 4:48 PM

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It's not limited in height for me... I'm not a math expert but that was the fastest solution that came to my mind, so I wrote that dirty test script within 2 minutes and tested it lol

cinder bolt May 21, 2022, 4:50 PM

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lol

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Hmmm it's weird

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I don't know why either, maybe it doesn't have to do with your script

next harness May 21, 2022, 5:55 PM

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quickly tested 5 more minutes... here is the plane cast version:


public class PlacementTest : MonoBehaviour {
    
    public GameObject testObject;

    private Plane plane;
    private Ray ray;
    
    private void Update() {

        if (Input.GetMouseButton(0)) {
            //Create a plane facing the player on Y axis (X/Z rotation stays zero)
            Vector3 planeForward = (this.transform.position - testObject.transform.position);
            planeForward.y = 0f;
            plane.SetNormalAndPosition(planeForward.normalized, testObject.transform.position);
            
            //Create a ray facing forward from camera
            ray.origin = this.transform.position;
            ray.direction = this.transform.forward;

            //See if the ray hits the created plane
            if (plane.Raycast(ray, out float enter)) {
                //Keep X/Z position but modify Y (the height)
                Vector3 curentPosition = testObject.transform.position;
                curentPosition.y = ray.GetPoint(enter).y;
                testObject.transform.position = curentPosition;
            }

            return;
        }
        if (Physics.Raycast(this.transform.position, this.transform.forward, out RaycastHit hit, 100f)) {
            if (hit.transform.gameObject == testObject) {
                return;
            }
            testObject.transform.position = hit.point;
        }
    }
}

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that one should be more reliable, I've added some comments to it to make it easier to follow and implement

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good luck

cinder bolt May 21, 2022, 6:35 PM

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Thanks

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I'll look up some tutorials to see if there's anything helpful but what I've seen so far didn't help

cinder bolt May 21, 2022, 7:11 PM

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next harness quickly tested 5 more minutes... here is the plane cast version: ```using UnityE...

On which object did you put this script?

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The camera?

next harness May 21, 2022, 7:14 PM

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yes

cinder bolt May 21, 2022, 7:14 PM

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👍 testing now

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wtf it still limits the height

cinder bolt May 21, 2022, 7:15 PM

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cinder bolt And why does it limit how far it can go?

like this

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I've checked the code but I couldn't find anything that does this

cinder bolt May 21, 2022, 7:30 PM

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You know what, I don't think it's going to be a big problem anyways. It's weird that it happens, though I don't think it's too frustrating

#vector stuff idk please help I wanna die