How to make something like move tool and rotate tool, but without Handles, and instead with HandleAdornment? [HARD]

GamEditoPro · February 24, 2023, 7:59pm

Hello guys! I’m making my plugin which should help people work with terrain faster.
But I stuck with some problems, one of them is Cone/CylinderHandleAdornments, which I want to use for dragger and rotate tools.
You will ask why I don’t want use built-in Handles and ArcHandles? I don’t want use them because I don’t love their style at all.
So I made my own “Handles” for rotation and move:

But I got one big problem when I tried to script their functionality. HandleAdornments have less. For example, they haven’t MouseDrag, which gives:
face: NormalId; distance: number
For Handles, and
axis: Axis; relativeAngle: number; deltaRadius: number
For ArcHandles

So, when I tried to make this function myself, I got stuck with another problem: IDK how to properly calculate everything:

First thing that IDK how to calculate distance for move tool. On FIRST picture everything seems very easy:

Cast ray on that plane.
Then got distance from center to that dot.
Tada you got result.

I did that. And found problem: What if camera don’t see this plane? For example, if camera looks up. I tried: and got inversion. So if mouse looking right, script means that I’m moving left. (like roblox does xd). But this way CANNOT be implemented for Y-axis

Another way I can say is try to find intersection with mouse ray and (for this example) X-axis.

While this idea I liked more, I got another problem: What if this 2 vectors just won’t cross at all?

(yellow dot is cursor (IK that it’s bad)

I believe that this way is better than previous, but I need a bit of help with it: how I can adjust calculations to hit X-axis?

This’s part of code for detecting intersection with plane:

local MouseDirection = Mouse.UnitRay.Direction

local PlaneCFrame = CFrame.new() --Center of plane should be here.
local PlaneDirection = (PlaneCFrame * CFrame.Angles(math.pi / 2, 0, 0)).LookVector --Top direction of plane.
local PlaneCameraRelative = PlaneCFrame:Inverse() * workspace.CurrentCamera.CFrame 
local PlaneCameraLenght = -PlaneCameraRelative.Position.Y --How high camera is from plane.
local MouseOnPlaneDirection = CFrame.fromOrientation(PlaneCFrame:ToOrientation()):Inverse() * CFrame.new(MouseDirection.X, MouseDirection.Y, MouseDirection.Z)

local MouseHypothenuseLenght = PlaneCameraLenght / MouseOnPlaneDirection.Position.Y
--MouseHypothenuseLenght is How much we need multiply MouseDirection to hit plane

Can someone here help me make this code work for only 1 axis, but not plane?

(Here you can see white “Planet” - center of plane, and white grid with blue part - where mouse hits plane.

SomeFedoraGuy · February 24, 2023, 9:18pm

I believe the Transform plugin is the closest mover you can look into. I don’t know how it’s made but can’t you take a look in the plugin’s code?

GamEditoPro · February 25, 2023, 7:28am

Sorry, but can you give me link to that plugin? IDK about which one you talking about.

SomeFedoraGuy · February 25, 2023, 7:38am

The Transform plugin is found in the Model tab, next to Home (in Studio)

GamEditoPro · February 25, 2023, 8:37am

Looks like studio just won’t do anything if camera don’t see handles.

So I think studio have things set like this:

And if mouse don’t hit any of this planes (They are infinite I think but for this example they have borders) Studio won’t do anything.
So to move things by axis X, it should hit yellow or pink plane, for Z - cyan or pink, and for Y - yellow or cyan. I’ll try make smth like this.

GamEditoPro · February 25, 2023, 10:12am

I tried implement this, and got 50% of good results:

local Axis = string.sub(Object.Name, 1, 1)
local success = false
local Hypothenuse = 0
local MouseDirection = Mouse.UnitRay.Direction --Направление гипотенузы треугольника, надо найти длину
local ManualCFrame = CFrame.new(PlaneManualParams[1]) * CFrame.Angles(math.rad(PlaneManualParams[2].X), math.rad(PlaneManualParams[2].Y), math.rad(PlaneManualParams[2].Z))

if Axis == "X" or Axis == "Z" then
	--trying to hit one out of 2 planes
	--plane XZ
	local ManualCFrame = CFrame.new(PlaneManualParams[1]) * CFrame.Angles(math.rad(PlaneManualParams[2].X), math.rad(PlaneManualParams[2].Y), math.rad(PlaneManualParams[2].Z))
	local XZPlaneDirection = (ManualCFrame * CFrame.Angles(math.pi / 2, 0, 0)).LookVector --Смотрит ВВЕРХ
	local XZPlaneCameraRelative = ManualCFrame:Inverse() * workspace.CurrentCamera.CFrame
	local XZPlaneCameraLenght = -XZPlaneCameraRelative.Position.Y
	local XZMouseOnPlaneDirection = CFrame.fromOrientation(ManualCFrame:ToOrientation()):Inverse() * CFrame.new(MouseDirection.X, MouseDirection.Y, MouseDirection.Z)

	local XZMouseHypothenuseLenght = XZPlaneCameraLenght / XZMouseOnPlaneDirection.Position.Y
	if XZMouseHypothenuseLenght >= 0 then
		success = true
	end
	Hypothenuse = XZMouseHypothenuseLenght
end
if Axis == "Z" or Axis == "Y" and success == false then
	--trying to hit one out of 2 planes
	--plane ZY
	local ManualCFrame = CFrame.new(PlaneManualParams[1]) * CFrame.Angles(math.rad(PlaneManualParams[2].X), math.rad(PlaneManualParams[2].Y), math.rad(PlaneManualParams[2].Z))
	local ZYPlaneDirection = (ManualCFrame * CFrame.Angles(0, 0, math.pi / 2)).LookVector --Смотрит ВВЕРХ
	local ZYPlaneCameraRelative = ManualCFrame:Inverse() * workspace.CurrentCamera.CFrame
	local ZYPlaneCameraLenght = -ZYPlaneCameraRelative.Position.Y
	local ZYMouseOnPlaneDirection = CFrame.fromOrientation(ManualCFrame:ToOrientation()):Inverse() * CFrame.new(MouseDirection.X, MouseDirection.Y, MouseDirection.Z)

	local ZYMouseHypothenuseLenght = ZYPlaneCameraLenght / ZYMouseOnPlaneDirection.Position.Y
	if ZYMouseHypothenuseLenght >= 0 then
		success = true
	end
	Hypothenuse = ZYMouseHypothenuseLenght
end
if Axis == "Y" or Axis == "X" and success == false then
	--trying to hit one out of 2 planes
	--plane YX
	local YXPlaneDirection = (ManualCFrame * CFrame.Angles(math.pi / 2, 0, 0)).LookVector --Смотрит ВВЕРХ
	local YXPlaneCameraRelative = ManualCFrame:Inverse() * workspace.CurrentCamera.CFrame
	local YXPlaneCameraLenght = -YXPlaneCameraRelative.Position.Y
	local YXMouseOnPlaneDirection = CFrame.fromOrientation(ManualCFrame:ToOrientation()):Inverse() * CFrame.new(MouseDirection.X, MouseDirection.Y, MouseDirection.Z)

	local YXMouseHypothenuseLenght = YXPlaneCameraLenght / YXMouseOnPlaneDirection.Position.Y
	if YXMouseHypothenuseLenght >= 0 then
		success = true
	end
	Hypothenuse = YXMouseHypothenuseLenght
end

--BrushPart.CFrame = CFrame.new((workspace.CurrentCamera.CFrame.Position + (MouseDirection * Hypothenuse)).X, (workspace.CurrentCamera.CFrame.Position + (MouseDirection * Hypothenuse)).Y, (workspace.CurrentCamera.CFrame.Position + (MouseDirection * Hypothenuse)).Z) * CFrame.fromOrientation(math.rad(DefaultBrushRotation.X), math.rad(DefaultBrushRotation.Y), math.rad(DefaultBrushRotation.Z)) * CFrame.new(0, ToolSettings[Tool]["Brush"]["Size"][2].Y * (ToolSettings[Tool]["Brush"]["Pivot"][2] - 50) / 100, 0)
if success == true then
	local MouseHit = MouseDirection * Hypothenuse
	local MouseAlongAxis = MouseHit[Axis]
	local CameraAlongAxis = workspace.CurrentCamera.CFrame.Position[Axis]
	--local DistanceAlongAxis = CameraAlongAxis + MouseAlongAxis
	--local DistanceAlongAxis = -PlaneManualParams[1][Axis] + MouseAlongAxis
	MoveHandlesDrag(Axis, MouseAlongAxis)
else
	warn("Not success")
end

X and Z axis work almsot perfect, but only on XZ plane, and axis Y just don’t get affected at all.

Y-distance.