-- Processes a given model for simulation behavior
local function ProcessModel(model)
-- Run the function on a separate task thread (non-blocking)
task.delay(0, function()
-- Validate input model
if not model or not model:IsA("Model") or model.Name == "Trees" then
warn("Invalid model provided: ".. model.Name)
return
end
-- Get the model's PrimaryPart (used as the anchor/reference)
local primaryPart = model.PrimaryPart
-- Remove all attributes from the PrimaryPart
for attributeName in pairs(primaryPart:GetAttributes()) do
primaryPart:SetAttribute(attributeName, nil)
end
-- Function to check if a part is grounded (touching Terrain)
local function isGrounded(part)
-- Get a list of parts that the current part is touching
local touchingParts = part:GetTouchingParts()
-- Return true if touching terrain
for _, touchingPart in ipairs(touchingParts) do
if touchingPart:IsA("Terrain") then
return true
end
end
return false
end
-- Weld two parts together using WeldConstraint
local function weldParts(part1, part2)
-- Only proceed if both are BaseParts
if not part1:IsA("BasePart") or not part2:IsA("BasePart") then
return
end
-- Check if a weld already exists to avoid duplication
for _, weld in ipairs(part1:GetChildren()) do
if weld:IsA("WeldConstraint") and
((weld.Part0 == part1 and weld.Part1 == part2) or
(weld.Part0 == part2 and weld.Part1 == part1)) then
return -- Weld already exists
end
end
-- Create and set up the weld
local weld = Instance.new("WeldConstraint")
weld.Part0 = part1
weld.Part1 = part2
weld.Parent = part1
end
-- Collect all BaseParts in the model
local allParts = {}
for _, part in pairs(model:GetDescendants()) do
if part:IsA("BasePart") then
table.insert(allParts, part)
-- Unanchor all parts initially (except the primary part)
if part ~= primaryPart then
part.Anchored = false
end
-- Connect a Touched event to re-anchor the part if it touches Terrain
local touchConnection
touchConnection = part.Touched:Connect(function(hitPart)
-- If part is removed, disconnect the connection
if not part:IsDescendantOf(workspace) then
touchConnection:Disconnect()
return
end
-- Re-anchor part if it touches terrain (and is still grounded)
if hitPart:IsA("Terrain") then
if isGrounded(part) then
part.Anchored = true
end
end
end)
-- Monitor each part per frame to check if it's still grounded
local heartbeatConnection
heartbeatConnection = game:GetService("RunService").Heartbeat:Connect(function()
if not part:IsDescendantOf(workspace) then
heartbeatConnection:Disconnect()
return
end
-- If the part was anchored but no longer grounded, unanchor it
if part.Anchored and part ~= primaryPart then
if not isGrounded(part) then
part.Anchored = false
end
end
end)
end
end
-- On startup: anchor any part already touching the ground
for _, part in ipairs(allParts) do
if part ~= primaryPart and isGrounded(part) then
part.Anchored = true
end
end
-- === TOUCHING LOGIC PLACEHOLDER ===
-- You could add logic here to weld together parts that are touching each other
-- Function to check if model should be removed (e.g., only primary part is left)
local function checkForRemoval()
local remainingParts = 0
for _, part in pairs(model:GetDescendants()) do
if part:IsA("BasePart") then
remainingParts += 1
end
end
-- If only 1 BasePart remains (the primary), destroy the whole model
if remainingParts <= 1 then
model:Destroy()
end
end
-- Listen for parts being removed from the model
model.DescendantRemoving:Connect(function(descendant)
-- If a BasePart (not the primary) is removed, check if model should be destroyed
if descendant:IsA("BasePart") and descendant ~= primaryPart then
task.defer(checkForRemoval) -- delay to let removal finish
end
end)
return true -- indicate success
end)
end
Function is called every time a pet is placed for the terrain. The video explains the outcomes shown. This rock model in particular is just a min model with a primary and parts underneath it. One issue could be that the parts are deeply intersecting when anchored. But even so this shouldn’t happen
mining for the game. Next I wanted bricks to fall so if you deleted the blocks underneath the part the top part would fall. I also wanted it that when spawning the structure like trees or rocks or wtv. Parts that are “grounded” or that are touching terrain will be anchored inside the model but will also be still be welded normally.
