間取り図から立ち上がり、歩いて見られる3D住戸

Build an interactive visualisation that turns a floor plan into a 3D apartment. Show a clean 2D plan of a one-bedroom apartment with a living-dining-kitchen area, bedroom, bathroom, toilet, entrance hall and balcony, drawn in soft cream and wood tones with dimension labels. Generate both the plan and the 3D model from the same dimension data. In a lower panel, animate the build-up: floor first, then walls and windows rising, then furniture such as bed, sofa, table, TV and plants appearing. Orbit the camera around the cutaway model, then drop into a first-person walk through the rooms. While walking, display a marker with a view cone on the plan that follows the camera in real time. Add short step captions and a small note that heights and interiors are placeholders. Use a light, minimal palette. Done means one smooth sequence from plan to walkthrough.