Merge pull request #296 from sudhir9297/wed-6-may-bug-fix

fix: Improve item surface placement, floorplan resizing, and placement preview stability

packages/core/src/schema/index.ts

@@ -55,7 +55,12 @@ export type {
   TemperatureControl,
   ToggleControl,
 } from './nodes/item'
-export { getScaledDimensions, ItemNode } from './nodes/item'
+export {
+  getScaledDimensions,
+  ItemNode,
+  isLowProfileItemSurface,
+  LOW_PROFILE_ITEM_SURFACE_MAX_HEIGHT,
+} from './nodes/item'
 export { LevelNode } from './nodes/level'
 export type { RoofSurfaceMaterialRole, RoofSurfaceMaterialSpec } from './nodes/roof'
 export { getEffectiveRoofSurfaceMaterial, RoofNode } from './nodes/roof'

packages/core/src/schema/nodes/item.ts

@@ -135,6 +135,20 @@ export const ItemNode = BaseNode.extend({
 
 export type ItemNode = z.infer<typeof ItemNode>
 
+export const LOW_PROFILE_ITEM_SURFACE_MAX_HEIGHT = 0.1
+
+/**
+ * Low, floor-resting items like rugs and parking mats can receive items visually,
+ * but should not become item parents or block normal floor placement.
+ */
+export function isLowProfileItemSurface(item: ItemNode): boolean {
+  if (item.asset.attachTo) return false
+  const surfaceHeight = item.asset.surface
+    ? item.asset.surface.height * item.scale[1]
+    : getScaledDimensions(item)[1]
+  return surfaceHeight <= LOW_PROFILE_ITEM_SURFACE_MAX_HEIGHT
+}
+
 /**
  * Returns the effective world-space dimensions of an item after applying its scale.
  * Use this everywhere item.asset.dimensions is used for spatial calculations.