From 7a580e604d611f7745610e267a68c29baae6d89c Mon Sep 17 00:00:00 2001
From: Jukka Aho <ahojukka5@gmail.com>
Date: Fri, 12 Dec 2025 23:33:47 +0200
Subject: [PATCH] =?UTF-8?q?fix(backend):=20use=20coords=20field=20instead?=
 =?UTF-8?q?=20of=20=CE=BE=20in=20CPU=20backend?=
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Update CPU backend to use coords field from QuadraturePoint instead
of deprecated ξ field.

- Change ip.ξ to ip.coords in compute_element_stiffness
---
 src/backend/cpu.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backend/cpu.jl b/src/backend/cpu.jl
index 342217d..cde892c 100644
--- a/src/backend/cpu.jl
+++ b/src/backend/cpu.jl
@@ -142,7 +142,7 @@ function compute_element_stiffness(element::Element{N,NIP,F,B}, time::Float64) w
 
     # Integrate over element
     for ip in ips
-        ξ = ip.ξ
+        ξ = ip.coords
         w = ip.weight
 
         # NEW API: Basis function derivatives (shape function gradients in reference coords)