ArchVision AI: An AR and Physics-Integrated Intelligent Platform for Real-Time Interior Design, Structural Stress Simulation, and Budget-Intelligent House Planning

The conventional process of residential interior design and house construction planning is burdened by fragmented toolsets, static 2D blueprints, opaque budgeting, and a complete absence of real-world physical simulation. This paper presents ArchVision AI, a multi-layer intelligent platform that unifies Augmented Reality (AR) visualisation, Unity PhysX-based gravitational and structural collapse simulation, AI-driven layout generation using Google Gemini 2.5 Pro, a Budget Intelligence Engine with contractor-tier cost modelling, Vastu Shastra compliance enforcement through reverse-gravity haptic feedback, a Construction Phase Scheduler with milestone tracking, and a blockchain-anchored smart contract layer for land title verification and contractor payment escrow. Built on a Vite + TypeScript frontend generated via Google Stitch, a PostgREST API atop PostgreSQL managed through InsForge, and Google ARCore (Depth API, Geospatial API, Cloud Anchors), the platform enables users to visualise a complete three-bedroom house anchored to actual GPS coordinates, stress-test structural integrity via Finite Element Method (FEM) analysis, swap materials with real-time compressive-strength and cost recalculation, and digitally sign blockchain contracts -- all within a single web and AR application. Prototype evaluation demonstrated sub-400 ms AR anchor latency, real-time PhysX collapse rendering at 60 fps, a 76% reduction in design iteration time compared to conventional CAD workflows, and a 91% user accuracy rate in Vastu compliance verification, validating ArchVision AI as a viable, next-generation platform for the Indian real-estate and construction sector.