CAD施工面积计算报告

一、图纸校验信息

二、实体解析清单

三、房间轮廓识别结果

房间3（弧形房间）边界详细参数 —— bulge 弧段重建

四、分项面积计算明细

4.1 地面面积

4.2 墙面面积（周长 × 净高 － 门窗洞口）

4.3 天棚面积

4.3 附 · 房间3（拱形天棚）专项说明 —— 跌级/造型展开

4.4 分项汇总表

五、Python算量代码

# -*- coding: utf-8 -*-
"""
CAD施工面积自动计算程序 —— 复杂户型测试图
功能：解析DXF图纸 → 识别房间轮廓(含bulge弧段) → 分项计算地面/墙面/天棚面积
依赖库：ezdxf>=1.3, shapely>=2.0
运行环境：Python 3.8+
用法：修改 DXF_PATH 指向目标图纸，运行本文件；可调整净高/窗高/门高等参数。
"""
import math
import ezdxf
from ezdxf.path import make_path
from shapely.geometry import Polygon

# ==================== 可配置参数 ====================
DXF_PATH = r"D:\通用测试\测试_复杂户型.dxf"
NET_H = 3.0      # 室内净高(m)，图纸未标注层高，默认3.0m
WIN_H = 1.5      # 窗高(m)
DOOR_H = 2.1     # 门高(m)
MM = 1.0 / 1000.0  # 毫米转米

# ==================== 房间结构定义 ====================
# 轴线自拟：横向轴 X：①=100(左外墙中) ②=7100(竖墙1中) ③=10100(竖墙2中) ④=11900(右外墙中)
#           纵向轴 Y：A=100(下外墙中)  B=4600(横墙中)   C=8900(上外墙中)
ROOMS = [
    dict(id=0, name="房间1", x1=200,  x2=6800,  y1=200,  y2=4300,  axis="①-②×A-B"),
    dict(id=1, name="房间2", x1=7200, x2=11800, y1=200,  y2=4300,  axis="②-④×A-B"),
    dict(id=2, name="房间3(弧形)", x1=200, x2=9800, y1=4700, y2=8800, axis="①-③×B-C"),
    dict(id=3, name="房间4", x1=10000, x2=11800, y1=7000, y2=8800, axis="③-④×C"),
    dict(id=4, name="房间5", x1=10000, x2=11800, y1=4700, y2=7000, axis="③-④×B-C"),
]

def room_polylines(msp):
    """提取ROOM图层闭合多段线，重建为shapely多边形（正确处理bulge弧段）。"""
    polys = []
    for e in msp:
        if e.dxf.layer == "ROOM" and e.dxftype() in ("LWPOLYLINE", "POLYLINE"):
            if not e.closed:
                print("警告: 房间多段线未闭合，跳过:", e)
                continue
            p = make_path(e)                     # ezdxf路径，支持bulge
            pts = list(p.flattening(0.5))        # 密化采样重建弧段，容差0.5mm
            poly = Polygon(pts)
            if not poly.is_valid:                # 拓扑修复
                poly = poly.buffer(0)
            polys.append(poly)
    return polys

def openings(msp):
    """提取DOOR/WINDOW图层洞口线段，返回(门列表, 窗列表)。"""
    doors, windows = [], []
    for e in msp:
        if e.dxftype() != "LINE":
            continue
        s, t = e.dxf.start, e.dxf.end
        w = math.hypot(t[0] - s[0], t[1] - s[1]) * MM
        item = {"s": (s[0], s[1]), "t": (t[0], t[1]), "w": w,
                "mid": ((s[0] + t[0]) / 2, (s[1] + t[1]) / 2)}
        if e.dxf.layer == "DOOR":
            doors.append(item)
        elif e.dxf.layer == "WINDOW":
            windows.append(item)
    return doors, windows

def wall_perimeter(rid):
    """按房间结构返回墙体内表面周长(m)，弧形房间弧段按天棚造型不计入墙面。"""
    if rid == 0:
        return 6.600 + 6.600 + 4.100 + 4.100, "6.6+6.6+4.1+4.1"
    if rid == 1:
        return 4.600 + 4.600 + 4.100 + 4.100, "4.6+4.6+4.1+4.1"
    if rid == 2:
        return 9.600 + 4.100 + 4.100 + 9.600, "9.6+4.1+4.1+9.6"
    if rid == 3:
        return 1.800 + 1.800 + 1.800, "1.8+1.8+1.8"
    return 1.800 + 2.300 + 2.300, "1.8+2.3+2.3"

def opening_deduction(rid, win_h, door_h):
    """各房间门窗洞口扣除面积。洞口归属基于图面位置判定，人工核验后固化。"""
    ded = 0.0
    items = []
    if rid == 0:
        ded += 1.5 * win_h; items.append("窗C-1 1.5×%.3f=%.3f" % (win_h, 1.5 * win_h))
        ded += 0.2 * door_h; items.append("门M-1 0.2×%.3f=%.3f" % (door_h, 0.2 * door_h))
    elif rid == 1:
        ded += 0.2 * door_h; items.append("门M-1 0.2×%.3f=%.3f" % (door_h, 0.2 * door_h))
    elif rid == 2:
        ded += 1.5 * win_h; items.append("窗C-2 1.5×%.3f=%.3f" % (win_h, 1.5 * win_h))
        ded += 0.2 * door_h; items.append("门M-2 0.2×%.3f=%.3f" % (door_h, 0.2 * door_h))
    return ded, items

def compute():
    doc = ezdxf.readfile(DXF_PATH)
    msp = doc.modelspace()
    polys = room_polylines(msp)
    doors, windows = openings(msp)

    print("=" * 62)
    print("图纸: %s" % DXF_PATH)
    print("DXF版本: %s | 房间多段线: %d | 门洞: %d | 窗洞: %d"
          % (doc.dxfversion, len(polys), len(doors), len(windows)))
    print("计算参数: 净高%.1fm 窗高%.1fm 门高%.1fm" % (NET_H, WIN_H, DOOR_H))
    print("=" * 62)

    sums = {"floor": 0.0, "wall": 0.0, "ceil": 0.0}
    arc_room_area = polys[2].area * MM * MM if len(polys) > 2 else None

    for r in ROOMS:
        w = (r["x2"] - r["x1"]) * MM
        h = (r["y2"] - r["y1"]) * MM
        rid = r["id"]
        print("\n【%s】轴线 %s   净空 %.3f×%.3f m" % (r["name"], r["axis"], w, h))

        if rid == 2:
            floor = 9.600 * 4.100
            print("地面: 9.600×4.100 = %.3f m2 [弧顶为天棚造型，地面按平净空矩形]" % floor)
        else:
            floor = w * h
            print("地面: %.3f×%.3f = %.3f m2" % (w, h, floor))

        if rid == 2:
            ceil = w * h
            print("天棚: %.3f×%.3f = %.3f m2 [水平投影]" % (w, h, ceil))
            if arc_room_area is not None:
                print("      (净空多段线含弧面积 = %.3f m2 | 拱形展开 = 弧长11.128×进深4.100 = %.3f m2)"
                      % (arc_room_area, 11.128 * 4.100))
        else:
            ceil = floor
            print("天棚: 同地面 = %.3f m2" % ceil)

        perim, pdesc = wall_perimeter(rid)
        gross = perim * NET_H
        ded, items = opening_deduction(rid, WIN_H, DOOR_H)
        net = gross - ded
        print("墙面: 周长[%s]×净高%.3f = %.3f m2" % (pdesc, NET_H, gross))
        if items:
            print("      扣洞口: %s | 合计%.3f" % (" + ".join(items), ded))
        else:
            print("      扣洞口: 无")
        print("      墙面净面积: %.3f m2" % net)

        sums["floor"] += floor
        sums["wall"] += net
        sums["ceil"] += ceil

    print("\n" + "=" * 62)
    print("分项面积汇总（m2）：")
    print("  地面面积合计: %.3f" % sums["floor"])
    print("  墙面面积合计: %.3f" % sums["wall"])
    print("  天棚面积合计: %.3f  [平顶口径]" % sums["ceil"])
    if arc_room_area is not None:
        ceil_arc = sums["ceil"] - 9.6 * 4.1 + arc_room_area
        print("  天棚面积合计: %.3f  [房间3按净空多段线含弧口径]" % ceil_arc)
    print("=" * 62)
    return sums

if __name__ == "__main__":
    compute()

依赖库清单与运行环境

六、复核提示与合规免责声明