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Synthetic floorplan dataset generator for Indian residential construction.
Produces (parametric_input, floorplan_output) pairs matching the user's ProjectCreate schema.
"""
import json, random, math
from dataclasses import dataclass
from typing import List, Dict, Any, Optional, Tuple
from datasets import Dataset, DatasetDict
ROOM_SIZES = {
"bedroom": {"min_w": 2.7, "max_w": 4.2, "min_d": 3.0, "max_d": 4.8, "area_range": (10, 20)},
"master_bedroom":{"min_w": 3.3, "max_w": 4.5, "min_d": 3.6, "max_d": 5.4, "area_range": (14, 25)},
"toilet": {"min_w": 1.2, "max_w": 1.8, "min_d": 1.8, "max_d": 2.7, "area_range": (2.5, 5)},
"kitchen": {"min_w": 2.4, "max_w": 3.6, "min_d": 2.7, "max_d": 4.2, "area_range": (7, 15)},
"living": {"min_w": 3.3, "max_w": 5.4, "min_d": 3.6, "max_d": 6.0, "area_range": (14, 30)},
"dining": {"min_w": 2.7, "max_w": 3.6, "min_d": 3.0, "max_d": 4.5, "area_range": (9, 16)},
"pooja": {"min_w": 1.2, "max_w": 1.8, "min_d": 1.5, "max_d": 2.1, "area_range": (1.8, 4)},
"study": {"min_w": 2.1, "max_w": 3.0, "min_d": 2.4, "max_d": 3.6, "area_range": (5, 11)},
"balcony": {"min_w": 1.2, "max_w": 2.4, "min_d": 2.4, "max_d": 4.5, "area_range": (3, 10)},
"parking": {"min_w": 2.5, "max_w": 3.3, "min_d": 5.0, "max_d": 6.0, "area_range": (12, 20)},
"staircase": {"min_w": 2.7, "max_w": 3.3, "min_d": 3.0, "max_d": 4.5, "area_range": (8, 15)},
"corridor": {"min_w": 1.0, "max_w": 1.5, "min_d": 2.4, "max_d": 6.0, "area_range": (2.5, 9)},
"utility": {"min_w": 1.5, "max_w": 2.4, "min_d": 1.8, "max_d": 3.0, "area_range": (3, 7)},
"store": {"min_w": 1.2, "max_w": 2.1, "min_d": 1.5, "max_d": 2.4, "area_range": (2, 5)},
}
PLOT_SHAPES = ["rectangular", "l_shaped", "trapezoid"]
DIRECTIONS = ["N", "S", "E", "W"]
CITIES = ["Delhi", "Mumbai", "Bangalore", "Chennai", "Hyderabad", "Pune", "Kolkata", "Ahmedabad", "Jaipur", "other"]
MUNICIPALITIES = ["MC", "MDA", "PMA", "BDA", "GHMC", "BBMP", "MCD", "KMC", "JDA", None]
def rect_polygon(x, y, w, d):
return [[round(v, 2) for v in p] for p in [[x, y], [x+w, y], [x+w, y+d], [x, y+d]]]
def polygon_area(poly):
n = len(poly)
area = 0.0
for i in range(n):
x1, y1 = poly[i]
x2, y2 = poly[(i+1)%n]
area += x1*y2 - x2*y1
return abs(area)/2.0
def polygon_bbox(poly):
xs = [p[0] for p in poly]; ys = [p[1] for p in poly]
return min(xs), min(ys), max(xs), max(ys)
def make_plot_boundary(params):
shape = params.get("plot_shape", "rectangular")
L, W = params["plot_length"], params["plot_width"]
if shape == "rectangular":
return rect_polygon(0, 0, L, W)
if shape == "l_shaped":
cw = params.get("cutout_width", L*0.3)
ch = params.get("cutout_height", W*0.3)
corner = params.get("cutout_corner", "NE")
if corner == "NE":
return [[0,0],[L,0],[L,W-ch],[L-cw,W-ch],[L-cw,W],[0,W]]
elif corner == "NW":
return [[0,0],[L,0],[L,W],[cw,W],[cw,W-ch],[0,W-ch]]
elif corner == "SE":
return [[0,0],[L-cw,0],[L-cw,ch],[L,ch],[L,W],[0,W]]
elif corner == "SW":
return [[cw,0],[L,0],[L,W],[0,W],[0,ch],[cw,ch]]
return rect_polygon(0,0,L,W)
if shape == "trapezoid":
fw = params.get("plot_front_width", L)
rw = params.get("plot_rear_width", L*0.8)
off = params.get("plot_side_offset", 0.0)
return [[0,0],[fw,0],[fw-off,W],[-off,W]]
return rect_polygon(0,0,L,W)
def make_buildable_boundary(plot_poly, params):
sf = params.get("setback_front", 1.5)
sr = params.get("setback_rear", 1.0)
sl = params.get("setback_left", 1.0)
srt = params.get("setback_right", 1.0)
minx, miny, maxx, maxy = polygon_bbox(plot_poly)
if len(plot_poly) == 4 and abs((maxx-minx)*(maxy-miny) - polygon_area(plot_poly)) < 0.1:
return rect_polygon(minx+sl, miny+sf, maxx-minx-sl-srt, maxy-miny-sf-sr)
return rect_polygon(minx+sl, miny+sf, maxx-minx-sl-srt, maxy-miny-sf-sr)
def distribute_width(total, n):
base = total/n
bays = []
remaining = total
for i in range(n):
if i == n-1:
bays.append(round(remaining, 2))
else:
bay = max(2.4, round(base, 1))
bay = min(bay, remaining - 2.4*(n-i-1))
bays.append(bay)
remaining -= bay
return bays
def distribute_depth(total, n):
base = total/n
rows = []
remaining = total
for i in range(n):
if i == n-1:
rows.append(round(remaining, 2))
else:
d = max(2.4, round(base, 1))
d = min(d, remaining - 2.4*(n-i-1))
rows.append(d)
remaining -= d
return rows
def generate_room_specs(params):
specs = []
num_bed = params["num_bedrooms"]
num_toi = params["toilets"]
has_pooja = params.get("has_pooja", False)
has_study = params.get("has_study", False)
has_balc = params.get("has_balcony", False)
parking = params.get("parking", False)
num_floors = params.get("num_floors", 1)
has_stilt = params.get("has_stilt", False)
has_basement = params.get("has_basement", False)
custom = params.get("custom_room_config", None) or []
def add(rtype, rid, name, zone, floor="gf", target_area=None):
specs.append({"id": rid, "type": rtype, "name": name, "zone": zone, "floor": floor, "target_area": target_area})
add("living", "living_1", "Living Room", "front", "gf", 18)
add("kitchen", "kitchen_1", "Kitchen", "mid", "gf", 9)
add("dining", "dining_1", "Dining Area", "front", "gf", 12)
add("toilet", "toilet_common", "Common Toilet", "back", "gf", 3.5)
for i in range(num_bed):
floor = "gf" if i < num_bed - (num_floors-1) else ("ff" if num_floors > 1 else "gf")
if i == 0:
add("master_bedroom", f"bedroom_{i+1}", "Master Bedroom", "back", floor, 16)
else:
add("bedroom", f"bedroom_{i+1}", f"Bedroom {i+1}", "back", floor, 12)
for i in range(num_toi):
floor = "gf" if i < num_toi - (num_floors-1) else ("ff" if num_floors > 1 else "gf")
add("toilet", f"toilet_{i+1}", f"Toilet {i+1}", "back", floor, 3.5)
if has_pooja: add("pooja", "pooja_1", "Pooja Room", "back", "gf", 2.5)
if has_study:
floor = "ff" if num_floors > 1 else "gf"
add("study", "study_1", "Study Room", "back", floor, 8)
if has_balc: add("balcony", "balcony_1", "Balcony", "side", "gf", 5)
add("staircase", "stairs_1", "Staircase", "mid", "gf", 10)
if has_stilt or parking:
add("parking", "parking_1", "Parking", "side", "stilt", 15)
add("staircase", "stairs_stilt", "Staircase (Stilt)", "mid", "stilt", 10)
if has_basement:
add("store", "store_base", "Storage", "back", "basement", 8)
add("staircase", "stairs_base", "Staircase (Basement)", "mid", "basement", 10)
if num_floors >= 2:
ff_beds = max(0, num_bed - 1)
for i in range(ff_beds):
add("bedroom", f"bedroom_ff_{i+1}", f"Bedroom {num_bed - ff_beds + i + 1}", "back", "ff", 12)
add("living", "living_ff", "Family Lounge", "front", "ff", 14)
add("toilet", "toilet_ff", "Common Toilet (FF)", "back", "ff", 3.5)
if has_study and num_floors >= 2: add("study", "study_ff", "Study Room", "back", "ff", 8)
if has_balc: add("balcony", "balcony_ff", "Balcony (FF)", "side", "ff", 5)
if num_floors >= 3:
sf_beds = max(0, num_bed - 2)
for i in range(sf_beds):
add("bedroom", f"bedroom_sf_{i+1}", f"Bedroom {num_bed - sf_beds - ff_beds + i + 1}", "back", "sf", 12)
add("living", "living_sf", "Terrace Lounge", "front", "sf", 12)
add("toilet", "toilet_sf", "Common Toilet (SF)", "back", "sf", 3.5)
if has_balc: add("balcony", "balcony_sf", "Balcony (SF)", "side", "sf", 5)
for i, cr in enumerate(custom):
rtype = cr.get("type", "room").lower().replace(" ", "_")
floor_pref = cr.get("floor_preference", "either")
floor_map = {"basement":"basement","stilt":"stilt","gf":"gf","ff":"ff","sf":"sf","either":"gf"}
floor = floor_map.get(floor_pref, "gf")
min_a = cr.get("min_area_sqm", 10)
add(rtype, f"custom_{i+1}", cr.get("name", f"Custom Room {i+1}"), "mid", floor, min_a)
return specs
def place_rooms(buildable_poly, rooms_spec, vastu, road_side, north_dir):
minx, miny, maxx, maxy = polygon_bbox(buildable_poly)
bw, bd = maxx-minx, maxy-miny
placed = []
num_bays = max(2, min(4, int(bw/3.0)))
bay_widths = distribute_width(bw, num_bays)
def place_row(room_list, row_depth, y_start):
x_cursor = minx
placed_in_row = []
for i, room in enumerate(room_list):
if i >= len(bay_widths): break
w = bay_widths[i]
d = row_depth
target = room.get("target_area", w*d)
if target > 0 and w > 0:
adj_d = min(max(target/w, 2.4), row_depth)
d = round(adj_d, 2)
poly = rect_polygon(round(x_cursor,2), round(y_start,2), round(w,2), round(d,2))
area = polygon_area(poly)
placed_in_row.append({
"id": room["id"], "type": room["type"], "name": room["name"], "floor": room.get("floor","gf"),
"polygon": poly, "area_sqm": round(area,2),
"dimensions": {"width": round(w,2), "depth": round(d,2)},
"position": {"x": round(x_cursor+w/2,2), "y": round(y_start+d/2,2)},
})
x_cursor += w
return placed_in_row
all_rows = []
front_types = [r for r in rooms_spec if r["type"] in ("living","dining")]
if front_types: all_rows.append((front_types, bd*0.35))
mid_types = [r for r in rooms_spec if r["type"] in ("kitchen","utility","staircase","corridor","store")]
if mid_types: all_rows.append((mid_types, bd*0.3))
back_types = [r for r in rooms_spec if r["type"] in ("bedroom","master_bedroom","toilet","pooja","study")]
if back_types: all_rows.append((back_types, bd*0.35))
y_cursor = miny
for room_list, row_depth in all_rows:
placed.extend(place_row(room_list, row_depth, y_cursor))
y_cursor += row_depth
side_types = [r for r in rooms_spec if r["type"] in ("balcony","parking")]
for room in side_types:
if room["type"] == "balcony" and placed:
ref = placed[0] if road_side in ("N","W") else placed[-1]
rp = ref["polygon"]
minx_r, miny_r, maxx_r, maxy_r = polygon_bbox(rp)
bal_w = min(2.0, bw*0.15)
if road_side in ("N","S"):
if road_side == "N": poly = rect_polygon(minx_r, maxy_r, maxx_r-minx_r, bal_w)
else: poly = rect_polygon(minx_r, miny_r-bal_w, maxx_r-minx_r, bal_w)
else:
if road_side == "E": poly = rect_polygon(maxx_r, miny_r, bal_w, maxy_r-miny_r)
else: poly = rect_polygon(minx_r-bal_w, miny_r, bal_w, maxy_r-miny_r)
placed.append({
"id": room["id"], "type": "balcony", "name": room.get("name","Balcony"), "floor": room.get("floor","gf"),
"polygon": [[round(v,2) for v in p] for p in poly], "area_sqm": round(polygon_area(poly),2),
"dimensions": {"width": round(bal_w,2), "depth": round(maxx_r-minx_r,2)},
"position": {"x": round((minx_r+maxx_r)/2,2), "y": round((miny_r+maxy_r)/2,2)},
})
elif room["type"] == "parking":
poly = rect_polygon(minx, miny, min(bw, 3.0*2.5), min(bd*0.25, 6.0))
placed.append({
"id": room["id"], "type": "parking", "name": room.get("name","Parking"), "floor": room.get("floor","stilt"),
"polygon": [[round(v,2) for v in p] for p in poly], "area_sqm": round(polygon_area(poly),2),
"dimensions": {"width": round(min(bw,7.5),2), "depth": round(min(bd*0.25,6.0),2)},
"position": {"x": round(minx+min(bw,7.5)/2,2), "y": round(miny+min(bd*0.25,6.0)/2,2)},
})
return placed
def generate_openings(rooms, road_side):
doors, windows = [], []
entrance = [r for r in rooms if r["type"] == "living" and r["floor"] == "gf"]
if entrance:
lr = entrance[0]; poly = lr["polygon"]
mx, my, Mx, My = polygon_bbox(poly)
if road_side in ("N","S"):
x = round((mx+Mx)/2 - 0.45, 2)
y = My if road_side == "N" else my
doors.append({"id":"door_main","type":"main_entrance","width":0.9,"from":"outside","to":lr["id"],"position":[x,y],"orientation":"horizontal"})
else:
x = Mx if road_side == "E" else mx
y = round((my+My)/2 - 0.45, 2)
doors.append({"id":"door_main","type":"main_entrance","width":0.9,"from":"outside","to":lr["id"],"position":[x,y],"orientation":"vertical"})
for i, r1 in enumerate(rooms):
for r2 in rooms[i+1:]:
if r1["floor"] != r2["floor"]: continue
m1x, m1y, M1x, M1y = polygon_bbox(r1["polygon"])
m2x, m2y, M2x, M2y = polygon_bbox(r2["polygon"])
share_x = not (M1x < m2x or M2x < m1x)
share_y = not (M1y < m2y or M2y < m1y)
if share_x and abs(M1y-m2y) < 0.3:
x = round(max(m1x,m2x)+0.3,2); y = round(M1y,2)
doors.append({"id":f"door_{r1['id']}_{r2['id']}","type":"internal","width":0.75,"from":r1["id"],"to":r2["id"],"position":[x,y],"orientation":"horizontal"})
elif share_y and abs(M1x-m2x) < 0.3:
x = round(M1x,2); y = round(max(m1y,m2y)+0.3,2)
doors.append({"id":f"door_{r1['id']}_{r2['id']}","type":"internal","width":0.75,"from":r1["id"],"to":r2["id"],"position":[x,y],"orientation":"vertical"})
for r in rooms:
if r["type"] in ("living","bedroom","master_bedroom","dining","kitchen","study"):
poly = r["polygon"]; mx, my, Mx, My = polygon_bbox(poly)
if (Mx-mx) >= (My-my):
y = round((my+My)/2,2); cx = (mx+Mx)/2
x = mx if abs(mx-cx) > abs(Mx-cx) else Mx
windows.append({"id":f"win_{r['id']}","room":r["id"],"width":1.2,"height":1.5,"position":[round(x,2),y],"orientation":"vertical"})
else:
x = round((mx+Mx)/2,2); cy = (my+My)/2
y = my if abs(my-cy) > abs(My-cy) else My
windows.append({"id":f"win_{r['id']}","room":r["id"],"width":1.5,"height":1.2,"position":[x,round(y,2)],"orientation":"horizontal"})
return doors, windows
def generate_example(seed=None):
if seed is not None: random.seed(seed)
plot_length = round(random.uniform(8.0, 25.0), 1)
plot_width = round(random.uniform(7.0, 20.0), 1)
setback_front = round(random.uniform(1.0, 3.0), 1)
setback_rear = round(random.uniform(0.5, 2.0), 1)
setback_left = round(random.uniform(0.5, 2.0), 1)
setback_right = round(random.uniform(0.5, 2.0), 1)
road_side = random.choice(DIRECTIONS)
north_direction = random.choice(DIRECTIONS)
num_bedrooms = random.randint(1, 4)
toilets = random.randint(1, num_bedrooms+1)
parking = random.choice([True, False])
city = random.choice(CITIES)
vastu_enabled = random.choice([True, False])
road_width_m = round(random.uniform(6.0, 18.0), 1)
has_pooja = random.choice([True, False])
has_study = random.choice([True, False])
has_balcony = random.choice([True, False])
plot_shape = random.choice(["rectangular"]*8 + ["l_shaped"]*1 + ["trapezoid"]*1)
plot_front_width = plot_length if plot_shape != "trapezoid" else round(plot_length*random.uniform(0.8,1.0),1)
plot_rear_width = plot_length if plot_shape != "trapezoid" else round(plot_length*random.uniform(0.7,1.0),1)
plot_side_offset = 0.0 if plot_shape != "trapezoid" else round(random.uniform(-1.0,1.0),1)
cutout_corner = random.choice(["NE","NW","SE","SW"])
cutout_width = round(plot_length*random.uniform(0.15,0.35),1) if plot_shape=="l_shaped" else 0.0
cutout_height = round(plot_width*random.uniform(0.15,0.35),1) if plot_shape=="l_shaped" else 0.0
num_floors = random.choices([1,2,3], weights=[5,3,1])[0]
has_stilt = random.choice([True, False]) if num_floors > 1 else False
has_basement = random.choice([True, False])
municipality = random.choice(MUNICIPALITIES)
min_buildable = 5.0
if plot_length - setback_front - setback_rear < min_buildable:
setback_front = min(setback_front, (plot_length-min_buildable)/2)
setback_rear = min(setback_rear, (plot_length-min_buildable)/2)
if plot_width - setback_left - setback_right < min_buildable:
setback_left = min(setback_left, (plot_width-min_buildable)/2)
setback_right = min(setback_right, (plot_width-min_buildable)/2)
params = {
"name": f"Project_{random.randint(1000,9999)}",
"plot_length": plot_length, "plot_width": plot_width,
"setback_front": round(setback_front,1), "setback_rear": round(setback_rear,1),
"setback_left": round(setback_left,1), "setback_right": round(setback_right,1),
"road_side": road_side, "north_direction": north_direction,
"num_bedrooms": num_bedrooms, "toilets": toilets, "parking": parking,
"city": city, "vastu_enabled": vastu_enabled, "road_width_m": road_width_m,
"has_pooja": has_pooja, "has_study": has_study, "has_balcony": has_balcony,
"plot_shape": plot_shape,
"plot_front_width": plot_front_width if plot_shape=="trapezoid" else None,
"plot_rear_width": plot_rear_width if plot_shape=="trapezoid" else None,
"plot_side_offset": plot_side_offset if plot_shape=="trapezoid" else None,
"plot_corners": None,
"cutout_corner": cutout_corner, "cutout_width": cutout_width, "cutout_height": cutout_height,
"num_floors": num_floors, "has_stilt": has_stilt, "has_basement": has_basement,
"municipality": municipality, "custom_room_config": None, "team_id": None,
}
plot_boundary = make_plot_boundary(params)
buildable_boundary = make_buildable_boundary(plot_boundary, params)
room_specs = generate_room_specs(params)
rooms = place_rooms(buildable_boundary, room_specs, vastu_enabled, road_side, north_direction)
doors, windows = generate_openings(rooms, road_side)
total_area = sum(r["area_sqm"] for r in rooms if r["floor"] not in ("stilt","basement"))
built_up_area = sum(r["area_sqm"] for r in rooms)
floorplan = {
"project_name": params["name"],
"plot": {
"shape": plot_shape,
"outer_boundary": plot_boundary,
"setbacks": {"front": params["setback_front"], "rear": params["setback_rear"],
"left": params["setback_left"], "right": params["setback_right"]},
"buildable_boundary": buildable_boundary,
"road_side": road_side, "north_direction": north_direction,
"plot_length": plot_length, "plot_width": plot_width,
},
"rooms": rooms,
"doors": doors,
"windows": windows,
"dimensions": {
"total_built_up_area_sqm": round(built_up_area,2),
"total_carpet_area_sqm": round(total_area,2),
"ground_floor_area_sqm": round(sum(r["area_sqm"] for r in rooms if r["floor"]=="gf"),2),
"first_floor_area_sqm": round(sum(r["area_sqm"] for r in rooms if r["floor"]=="ff"),2),
"second_floor_area_sqm": round(sum(r["area_sqm"] for r in rooms if r["floor"]=="sf"),2),
"stilt_area_sqm": round(sum(r["area_sqm"] for r in rooms if r["floor"]=="stilt"),2),
"basement_area_sqm": round(sum(r["area_sqm"] for r in rooms if r["floor"]=="basement"),2),
},
"meta": {"num_floors": num_floors, "has_stilt": has_stilt, "has_basement": has_basement,
"vastu_enabled": vastu_enabled, "city": city, "municipality": municipality},
}
lines = [
f"Generate a floor plan for project '{params['name']}'.",
f"Plot dimensions: {plot_length}m x {plot_width}m, shape: {plot_shape}.",
f"Setbacks: front={params['setback_front']}m, rear={params['setback_rear']}m, left={params['setback_left']}m, right={params['setback_right']}m.",
f"Road side: {road_side}, North direction: {north_direction}.",
f"Requirements: {num_bedrooms} bedrooms, {toilets} toilets.",
]
if parking: lines.append("Parking is required.")
if has_pooja: lines.append("Include a Pooja room.")
if has_study: lines.append("Include a Study room.")
if has_balcony: lines.append("Include a Balcony.")
if has_stilt: lines.append("Stilt parking required.")
if has_basement: lines.append("Include a basement.")
lines.append(f"Number of floors: {num_floors} (1=G, 2=G+1, 3=G+2).")
if vastu_enabled: lines.append("Vastu compliance is enabled.")
lines.append(f"City: {city}, Municipality: {municipality or 'N/A'}.")
prompt = "\n".join(lines)
return {"prompt": prompt, "completion": json.dumps(floorplan, indent=2), "params": params}
def create_dataset(num_train=5000, num_val=500, num_test=500):
print(f"Generating {num_train} train, {num_val} val, {num_test} test examples...")
train = [generate_example(seed=i) for i in range(num_train)]
val = [generate_example(seed=100000+i) for i in range(num_val)]
test = [generate_example(seed=200000+i) for i in range(num_test)]
ds = DatasetDict({
"train": Dataset.from_list(train),
"validation": Dataset.from_list(val),
"test": Dataset.from_list(test),
})
return ds
if __name__ == "__main__":
ds = create_dataset(5000, 500, 500)
ds.save_to_disk("/app/floorplan_synthetic_dataset")
print("Saved to /app/floorplan_synthetic_dataset")
print(f"Train: {len(ds['train'])}, Val: {len(ds['validation'])}, Test: {len(ds['test'])}")
print("\n--- Sample prompt ---")
print(ds["train"][0]["prompt"][:500])
print("\n--- Sample completion (truncated) ---")
print(ds["train"][0]["completion"][:500])
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