editableMesh:GetTriangleVertices()

[mhmdsndb3 (Printer)]

that function inside the code sample does NOT exist

Page URL: https://create.roblox.com/docs/reference/engine/classes/EditableMesh#RaycastLocal

[Tavikron (Octav)]

Sure enough, the function was removed a few versions ago.

EditableMesh | Roblox API Reference

[yusufnakh]

Good luck working with EditableMesh

[mhmdsndb3 (Printer)]

i tried to make a thing to delete vertices one by one for an animation just to not find removevertex function

[Mmm_Wafflez (Sammy)]

A lot of the example code here is leftover from the EditableMesh / EditableImage beta period. EditableMeshes and Images have since been completely reworked with their release. I’ll try to replace the example functions, this is something I’ve been meaning to do for some time.

[yusufnakh]

Call the preferred method :RemoveUnused()

EditableMesh | Documentation - Roblox Creator Hub

There is no other option since the previous method is deprecated.
The documentation currently makes working with this API an arduous journey. It is an extremely cumbersome experience which is ultimately fruitful and rewarding.

Again, good luck.

[L3Norm]

Thanks for the report, yeah that example really needed to be updated

The example on the docsite is being updated, but in the meantime, here is an updated example function that will work:

-- Function that will cast a ray from the given viewport point, returning the world point of the hit and the UV coordinate
local function castRayFromCamera(meshPart : MeshPart, editableMesh : EditableMesh, viewportPoint : Vector3)
	if not meshPart then
		return
	end

	-- Calculate how much the object is being scaled in each dimension  
	local renderScale = meshPart.Size / meshPart.MeshSize

	-- Create ray from camera along the direction of a clicked point
	local ray = Workspace.CurrentCamera:ViewportPointToRay(viewportPoint.X, viewportPoint.Y)

	-- Convert to object space to use with RaycastLocal()
	local relativeOrigin = meshPart.CFrame:PointToObjectSpace(ray.Origin) / renderScale
	local relativeTarget = meshPart.CFrame:PointToObjectSpace(ray.Origin + ray.Direction * 100) / renderScale
	local relativeDirection = relativeTarget - relativeOrigin

	local faceId, point, barycentricCoordinate, vertId1, vertId2, vertId3 = editableMesh:RaycastLocal(relativeOrigin, relativeDirection)

	if not faceId then
		-- Didn't hit any faces
		return
	end

	-- Compute the hit point in world space
	local worldHitPoint = meshPart.CFrame:PointToWorldSpace(point * renderScale)

	-- Get the UVs on the face
	local uvId1 = editableMesh:GetVertexFaceUV(vertId1, faceId)
	local uvId2 = editableMesh:GetVertexFaceUV(vertId2, faceId)
	local uvId3 = editableMesh:GetVertexFaceUV(vertId3, faceId)

	local uv1 = editableMesh:GetUV(uvId1)
	local uv2 = editableMesh:GetUV(uvId2)
	local uv3 = editableMesh:GetUV(uvId3)

	-- Interpolate UVs within the face based on the barycentric coordinate
	local u = (barycentricCoordinate.x * uv1.x) + (barycentricCoordinate.y * uv2.x) + (barycentricCoordinate.z * uv3.x)
	local v = (barycentricCoordinate.x * uv1.y) + (barycentricCoordinate.y * uv2.y) + (barycentricCoordinate.z * uv3.y)

	return worldHitPoint, Vector2.new(u, v)
end

Let me know if you have any questions

Thanks!