From 9a5181b61415d46670abdcac7ae8acc0f6d4b58e Mon Sep 17 00:00:00 2001
From: LengthenedGradient
 <109800352+LengthenedGradient@users.noreply.github.com>
Date: Tue, 23 Jun 2026 21:36:15 -0400
Subject: [PATCH] Fix proper clipping compatibility?

I love race conditions
---
 lua/primitive/entities/base.lua | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/lua/primitive/entities/base.lua b/lua/primitive/entities/base.lua
index 6fe49c3..1028648 100644
--- a/lua/primitive/entities/base.lua
+++ b/lua/primitive/entities/base.lua
@@ -621,6 +621,28 @@ do
         end
     end)
 
+    -- Re-apply any proper_clipping physics clips after each primitive reconstruction.
+    -- Primitives reinitialize via PhysicsInitMultiConvex on every reconstruction, which wipes the clips
+    -- Bypass the race condition by preserving existing clips on rebuild
+    hook.Add("Primitive_PostRebuildPhysics", "Primitive_ProperClipping", function( ent )
+        if not ent.Clipped or not istable( ent.ClipData ) then return end -- no clips to reapply
+        if not ProperClipping or not isfunction( ProperClipping.ClipPhysics ) then return end -- proper_clipping not installed
+
+        -- Aggregate all physics clips
+        local norms, dists = {}, {}
+        local count = 0
+        for _, clip in ipairs( ent.ClipData ) do
+            if clip.physics then
+                count = count + 1
+                norms[count] = clip.norm
+                dists[count] = clip.dist
+            end
+        end
+
+        if count == 0 then return end -- no physics clips to reapply
+
+        ProperClipping.ClipPhysics( ent, norms, dists, true )
+    end)
 end