diff --git a/src/components/three/SmartMeasure.ts b/src/components/three/SmartMeasure.ts
index 33b1792..a7075ba 100644
--- a/src/components/three/SmartMeasure.ts
+++ b/src/components/three/SmartMeasure.ts
@@ -316,3 +316,22 @@ function pointToSegmentDist(px: number, py: number, ax: number, ay: number, bx:
   const closestY = ay + t * dy;
   return Math.sqrt((px - closestX) ** 2 + (py - closestY) ** 2);
 }
+
+/**
+ * Combined snap resolver: tries vertex first, then edge midpoint,
+ * falling back to the raw hit point. Returns { point, type }.
+ */
+export function resolveSnap(
+  mesh: THREE.Mesh,
+  hitPoint: THREE.Vector3,
+  camera: THREE.Camera,
+  canvasSize: { width: number; height: number },
+  vertexThresholdPx: number = 12,
+  edgeThresholdPx: number = 16
+): { point: THREE.Vector3; type: 'vertex' | 'edge' | 'surface' } {
+  const v = findNearestVertex(mesh, hitPoint, camera, canvasSize, vertexThresholdPx);
+  if (v) return { point: v, type: 'vertex' };
+  const e = findNearestEdgeSegment(mesh, hitPoint, camera, canvasSize, edgeThresholdPx);
+  if (e) return { point: e.midpoint, type: 'edge' };
+  return { point: hitPoint.clone(), type: 'surface' };
+}