from PIL import Image, ImageChops, ImageDraw, ImageFont
from pathlib import Path
out=Path(r'C:\projects\wheel\models\kfl_plate_b38_concept')
font=r'C:\Windows\Fonts\msyh.ttc'
title=ImageFont.truetype(font,38); normal=ImageFont.truetype(font,24); small=ImageFont.truetype(font,21)
im=Image.new('RGB',(1920,1300),'white');d=ImageDraw.Draw(im)
d.text((42,18),'KFL001 反装 · 铝板中心孔 Ø39 mm',font=title,fill='#193450')
d.text((42,80),'Ø38 外包络假设；8 mm 铝板；150 mm 轴；60 mm 开关与接线包络',font=normal,fill='#52657b')
d.rounded_rectangle((40,123,1880,177),radius=8,fill='#fff0eb')
d.text((55,134),'概念示意：仅用于讨论；轴承凸起轮廓及承载强度未验证，不可直接 CNC',font=normal,fill='#9b2b22')
def load(name,maxsize,rotation=0):
 img=Image.open(out/name).convert('RGB')
 if rotation:img=img.rotate(rotation,expand=True)
 mask=ImageChops.difference(img,Image.new('RGB',img.size,'white')).convert('L').point(lambda p:255 if p>12 else 0)
 b=mask.getbbox()
 if b:img=img.crop(b)
 img.thumbnail(maxsize);return img
side=load('side.png',(1730,370),90)
d.text((40,194),'整体侧视：电机在左，方向盘侧在右',font=normal,fill='#243a55')
im.paste(side,(95+(1730-side.width)//2,230+(370-side.height)//2))
d.line((40,620,1880,620),fill='#d8e0e9',width=2)
d.text((40,638),'反装结构（外形简化）',font=normal,fill='#243a55')
d.text((980,638),'铝板背面：垫圈与大孔的相对位置',font=normal,fill='#243a55')
detail=load('bearing_detail.png',(800,350));plate=load('plate_detail.png',(800,350))
im.paste(detail,(80+(800-detail.width)//2,680+(350-detail.height)//2))
im.paste(plate,(1020+(800-plate.width)//2,680+(350-plate.height)//2))
d.line((40,1055,1880,1055),fill='#d8e0e9',width=2)
rows=[
 ('中心孔 Ø39，轴承凸起按 Ø38 圆形包络示意，名义径向间隙 0.5 mm。','#243a55'),
 ('安装孔距 48、安装孔 Ø7：距中心孔最近材料宽度为 1 mm（几何值，不作强度结论）。','#243a55'),
 ('板侧 M6 垫圈按 Ø12 示意，靠中心孔一侧约 1.5 mm 悬空；真实承压须核对。','#9b2b22'),
 ('角码与对中长槽沿用前版；开关形状、轴承顶丝工具空间等尚未实物验证。','#52657b'),
]
for i,(s,c) in enumerate(rows):d.text((42,1073+i*43),s,font=small,fill=c)
im.save(out/'KFL_38凸起_39开孔_3D装配示意.png')