Question Draw RayCast works once and then not

Hi there,
one issue driving me crazy for 2 days and I cant figure out why it is behaving that strang.
I want to make a box selection for my factory game and therefore I wanted to Raycast through the corners of the selection drawn and form a mesh around the Rays.

Issue is, that for some reason, only my starting point, where I initially click works fine. But the other Rays dont work and they are always FAR off.

Through trooublshooting I am already only trying to only use the initially clicked position, draw a ray, where the drags starts and then the 2nd Ray should go wherever the mouse currently is, without any calculations in between. But the 2nd Ray (and when I calculated the other 2 corners also) is always far off where the mouse is.

I have an InputReceiverManager who tracks all the inputs and take the initial click like this:

Code (CSharp):

1. InitialMousePositionOnLeftClick = Mouse.current.position.ReadValue();

The Ray for this one works fine.
And then on every Update I have a the current mouse position with the same line of code, like this:

Code (CSharp):

1. CurrentMousePosition = Mouse.current.position.ReadValue();

Then I draw Rays accordingly like this when box selection is confirmed:

Code (CSharp):

1. Ray initialRay = MainCamera.ScreenPointToRay(InputReceiverManager.Instance.InitialMousePositionOnLeftClick);
2. Debug.DrawLine(initialRay.origin, initialRay.GetPoint(100f), Color.red);
3.  
4. Vector3 cameraOffset = new Vector3(0f, 0f, MainCamera.transform.position.z).Abs();
5. Ray movingRay = new Ray(MainCamera.transform.position, MainCamera.ScreenToWorldPoint((Vector3)InputReceiverManager.Instance.CurrentMousePosition + cameraOffset) - MainCamera.transform.position);
6. Debug.DrawRay(movingRay.origin, movingRay.GetPoint(100f), Color.red);
7.  
8. Ray movingRay2 = MainCamera.ScreenPointToRay(InputReceiverManager.Instance.CurrentMousePosition);
9. Debug.DrawRay(movingRay2.origin, movingRay2.GetPoint(100f), Color.red);

Now see how the "initialRay" is casting/drawing fine and the "movingRay" is far off where it should be:


I also tried calculating it all with ScreenToWorldPoint offsetting the camera position accordingly and go from there.
The math and result for the Rays is identical then.
What am I missing ?

KR

 

Oh my goodness, I did the actual Raycast right, but the DrawRay wrong *facepalm*
Yes indeed, I either had to use DrawLine for my code to work or substract movingRay.origin from the GetPoint() Vector when using DrawRay.
Thanks!

I will test out if can figure out the actual box selection through the Rays and come back here if the thread is done

 

I posted my whole solution here now:
https://forum.unity.com/threads/rec...-in-3d-world-with-perspective-camera.1463621/

My issue has been solved, thanks again @MelvMay