local AssetService = game:GetService("AssetService")
local Workspace = game:GetService("Workspace")

-- 在空间中初始化可编辑网格
local editableMesh = nil
local success, errorMsg = pcall(function()
	editableMesh = AssetService:CreateEditableMeshAsync(Content.fromUri("rbxassetid://ASSET_ID"))
end)

local meshPart = nil
if success and editableMesh then
	meshPart = AssetService:CreateMeshPartAsync(
		Content.fromObject(editableMesh),
		{ CollisionFidelity = Enum.CollisionFidelity.Hull }
	)
	meshPart.Parent = Workspace
else
	warn(errorMsg)
end

-- 该函数将从给定点发射一条射线，返回命中的世界点和UV坐标
local function castRayFromCamera(meshPart: MeshPart, editableMesh: EditableMesh, viewportPoint: Vector3)
	if not meshPart then
		return
	end

	-- 计算对象在每个维度上的缩放比例
	local renderScale = meshPart.Size / meshPart.MeshSize

	-- 从相机创建一条射线，方向指向点击的点
	local ray = Workspace.CurrentCamera:ViewportPointToRay(viewportPoint.X, viewportPoint.Y)

	-- 转换为对象空间以与RaycastLocal()一起使用
	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
		-- 未命中任何面
		return
	end

	-- 计算世界空间中的命中点
	local worldHitPoint = meshPart.CFrame:PointToWorldSpace(point * renderScale)

	-- 获取面上的UV
	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)

	-- 根据重心坐标在面内插值UV
	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