From bb4c82c2cc1e9724133c0aa774218abe9fef46dd Mon Sep 17 00:00:00 2001
From: "gpt-engineer-app[bot]"
 <159125892+gpt-engineer-app[bot]@users.noreply.github.com>
Date: Thu, 14 May 2026 11:28:05 +0000
Subject: [PATCH] Changes

Co-authored-by: Reifonas <211114984+Reifonas@users.noreply.github.com>
---
 src/stores/useModelStore.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/stores/useModelStore.ts b/src/stores/useModelStore.ts
index 87f7584..6ddfdf9 100644
--- a/src/stores/useModelStore.ts
+++ b/src/stores/useModelStore.ts
@@ -212,7 +212,11 @@ export const useModelStore = create<ModelStore>((set) => ({
       const dx = (a.x - b.x) * 1000;
       const dy = (a.y - b.y) * 1000;
       const dz = (a.z - b.z) * 1000;
-      const distanceMM = Math.sqrt(dx * dx + dy * dy + dz * dz);
+      const distanceWorldMM = Math.sqrt(dx * dx + dy * dy + dz * dz);
+      // Compensate for current render scale: world ≠ real when scaled.
+      // realMM = worldMM / factor (factor 1/50 → multiply by 50).
+      const factor = state.scaleRatio?.factor ?? 1;
+      const distanceMM = distanceWorldMM / factor;
       const measurement: Measurement = {
         id: `m_${Date.now()}`,
         pointA: a,