In this example, we will move a camera with comments using VCI.
Receive comments with vci.message(receive comments), detect the content of comments, and use vci.studio(ExportStudio)&(ExportSystemItem) to move the camera.

https://virtualcast.jp/products/ec146632ac29f854c9b85e8e8c1a693acc292ebd562d01c5d92790a0122cbc5c

This VCI doesn't require any SubItems.

main.lua

local _commentControllerIsActive = true -- When true, it can be controlled with comments
local _Maxheight = 3.0 --The maximum height it can be moved to using comments
local _Minheight = 0.3 --The minimum height it can be moved to using comments
 
function onUse(use)
    -- Enable/Disable the VCI on use
    --[[
        if use == "Board" then
            _commentControllerIsActive = not(_commentControllerIsActive)
            print("Controller : "..tostring(_commentControllerIsActive))
        end
    ]]
end
 
-- Change the position of the camera
function setCommentPosition(pos)
    if _commentControllerIsActive == false then
        print("Camera control with comments is disabled")
        return
    end
    if vci.studio.HasHandiCamera() == false then
        print("Handy camera doesn't exist. End.")
        return
    end
 
    local cam = vci.studio.GetHandiCamera()
 
    if (pos.y < 0.01) and (cam.GetPosition().y < _Minheight) then
        print("The camera cannot be controlled with comments as it's in the minimum height")
        pos.y = 0 -- ignore by changing y to 0
    end
    if (pos.y > 0.01) and (cam.GetPosition().y > _Maxheight) then
        print("The camera cannot be controlled with comments as it's in the maximum height")
        pos.y = 0 -- ignore by changing y to 0
    end
    pos = cam.GetRotation() * pos
    pos = pos + cam.GetPosition()
    cam.SetPosition(pos)
    --print("Cam Position : "..tostring(cam.GetPosition()))
end
 
-- Change the rotation of the camera
function setCommentRotation(rot)
    if _commentControllerIsActive == false then
        print("Camera controll with comments is disabled")
        return
    end
    if vci.studio.HasHandiCamera() == false then
        print("Handy camera doesn't exist. End.")
        return
    end
 
    local cam = vci.studio.GetHandiCamera()
    rot = cam.GetRotation() * rot
    cam.SetRotation(rot)
    --print("Cam Position : "..tostring(cam.GetPosition()))
end
 
-- Processes on comment receiption
function onMessage(sender, name, message)
    -- Content of the comment
    print(sender["name"].."「"..message.."」")
 
    -- The position and rotation to be added with comments
    local pos = Vector3.zero
    local rot = Quaternion.identity
    -- You can change the distance to move with a single comment. In meter.
    local movingDistance = 0.2
    -- You can change the angle to rotate with a single comment. In degree.
    local rotationAngle = 10
 
    -- Forward
    if string.find(message,"Forward") ~= nil or string.find(message,"forward") ~= nil then
        pos.z = pos.z + movingDistance
    end
    -- Backward
    if string.find(message,"Back") ~= nil or string.find(message,"back") ~= nil then
        pos.z = pos.z - movingDistance
    end
    -- Upward
    if string.find(message,"Up") ~= nil or string.find(message,"up") ~= nil then
        pos.y = pos.y + movingDistance
    end
    -- Down
    if string.find(message,"Down") ~= nil or string.find(message,"down") ~= nil then
        pos.y = pos.y - movingDistance
    end
 
    -- The comment includes right
    if string.find(message,"Right") ~= nil or string.find(message,"right") ~= nil then
        -- When the comment contains "Turn," process rotation and end
        if string.find(message,"Turn") ~= nil or string.find(message,"turn") ~= nil then
            rot = Quaternion.AngleAxis(rotationAngle, Vector3.up)
            setCommentRotation(rot)
            return
        end
        -- Move right
        pos.x = movingDistance
    end
 
    -- The comment includes left
    if string.find(message,"Left") ~= nil or string.find(message,"left") ~= nil then
        -- When the comment contains "Turn," process rotation and end
        if string.find(message,"Turn") ~= nil or string.find(message,"turn") ~= nil then
            rot = Quaternion.AngleAxis(-rotationAngle, Vector3.up)
            setCommentRotation(rot)
            return
        end
        --Move left
        pos.x = -movingDistance
    end
 
    -- Update the position
    setCommentPosition(pos)
end
 
-- Receiving comments
vci.message.On('comment', onMessage)

• By removing the comment-out in onUse, you can enable/disable the control when a SubItem of the Board is used.
• By changing _Maxheight and _Minheight, you can modify the hight limitation of the camera movement.

You can create a camera collider by creating a SubItem that follows the position of the camera. You can push the camera away by adding a process that moves the camera away when touched.