Help with Viewport Map Icons

[Geomaster (Dude)]

Hey, and thanks for reading in advance.

I’m creating a map using a ViewportFrame that’s updated in real-time, showing the positions of every player and other specific game element states.

Problem being - currently, the X coordinate of my icon is inaccurate, and it outpaces my movement when I walk in either direction.

The X coordinate is only correct when I approach the center of the map, and the Y coordinate appears to be 100% accurate to my location regardless of where I am.

Here’s the snippet that updates the map on a RenderStep bind:

function updateMap()
	if mapModels ~= {} then
		local IconFolder = UI.MapView.Viewport:FindFirstChild("IconFolder")
		
		if not IconFolder then
			IconFolder = Instance.new("Folder")
			IconFolder.Name = "IconFolder"
			IconFolder.Parent = UI.MapView.Viewport
		end
		
		for _,Member in pairs(game.Players:GetPlayers()) do
			if Member.Character and Core:GetStat(Member.Character, "Health", 0) > 0
				and Member.Character:FindFirstChild("HumanoidRootPart")
			then
				local Icon = IconFolder:FindFirstChild(Member.Name)
				local M_Root = Member.Character.HumanoidRootPart
				local Vector, InView = miniCam:WorldToViewportPoint(M_Root.Position)
				
				if not Icon then
					Icon = Instance.new("ImageLabel")
					Icon.Image = "rbxassetid://"..10581359974
					Icon.ImageColor3 = Member.TeamColor.Color
					Icon.BackgroundTransparency = 1
					Icon.ZIndex = 5
					
					Icon.Size = UDim2.new(.1, 0, .1, 0)
					Icon.Position = UDim2.new(Vector.X, 0, Vector.Y, 0)
					Icon.SizeConstraint = Enum.SizeConstraint.RelativeYY
					
					Icon.Name = Member.Name; Icon.Parent = IconFolder
				else
					Icon.Position = UDim2.new(Vector.X, 0, Vector.Y, 0)
				end
				
			elseif IconFolder:FindFirstChild(Member.Name) then
				IconFolder[Member.Name]:Destroy()
			end
		end
	end
end

If anyone knows what’s causing this behavior, I’d be thankful. I have a suspicion the camera is involved, as my icon’s position changes when I jump, despite that not being a change in my planar coordinates.

[RMofSBI]

You need to convert your scale positions i believe, like this:

How would I position the minimap image according to where the character is?

You have to translate the X and Z coordinates of your position to scale, so this generally takes a little bit of time because you need some conversion factors. First, you need an origin to start from (this doesn’t have to necessarily be a place on the frame but it’s way better if you use a place on the map that is on the render) Use a while loop or RunService loop to constantly print out your root part’s position, and locate a spot on the render you want to use as your origin. Then hop into p…

[azqjanna]

Your math suggests that the minimap model of the map is the same scale as the real map, is that the case?

[Geomaster (Dude)]

Correct. Same scale, same position.

[azqjanna]

Is it possible the position M_Root.Position is closer to the camera than it should be? That would make it appear to be scaled wrong, consistent with what you see.

[Geomaster (Dude)]

Looks like I found the solution I was looking for here.