How to use Raycasts?

Hello, I am trying to find the y position of a foundation (placed within the game) by using Raycasts. However, I get an error:

Code:

'ConVar.Physics' does not contain a definition for 'Raycast'

How can I use Raycasts in my plugin?

Relevant code:

Code:

        public static float GetGroundY(BuildingBlock block)
        {
            RaycastHit hitinfo;
            var position = block.transform.position;
            if (Physics.Raycast(position, new Vector3(0f, -1f, 0f), out hitinfo, 100f, UnityEngine.LayerMask.GetMask(new string[] { "Terrain" })))
            {
                return hitinfo.point.y;
            }
            return position.y;
        }

Sorry, if this is a stupid question

 

do you want the position y of the foundation or of the ground at that position?

 

The foundation. I am *Attempting* to create a plugin that enables the user to raise foundations without having to destroy them all

 

So you want to get the ground height or the foundation height position?

 

foundation height position

 

just use foundationEntity.transform.position.y then. No need to use Raycast there.

 

How would I find the maximum height that the foundation can be placed at (at its current position)?