from PIL import Image,ImageDraw,ImageFont,ImageChops
from pathlib import Path
O=Path(r'C:\projects\wheel\models\kfl_3030_motor_corner_concept')
font=r'C:\Windows\Fonts\msyh.ttc'
def f(s): return ImageFont.truetype(font,s)
canvas=Image.new('RGB',(2400,1760),'#f4f6fa');d=ImageDraw.Draw(canvas)
d.text((65,35),'电机与底座型材连接 · 3D装配示意',font=f(50),fill='#18283c')
d.text((65,106),'左右各增加一只 2020 直角角码；两根 3030 底座纵梁向编码器端各延长 20 mm',font=f(27),fill='#3e5065')
def panel(name,xy,wh,title):
 x,y=xy;w,h=wh;d.rounded_rectangle((x,y,x+w,y+h),radius=18,fill='white',outline='#d9e0e9',width=2);d.text((x+20,y+15),title,font=f(28),fill='#20344c')
 img=Image.open(O/name).convert('RGB');diff=ImageChops.difference(img,Image.new('RGB',img.size,'white'));bounds=diff.getbbox()
 if bounds:
  left,top,right,bottom=bounds;img=img.crop((max(0,left-35),max(0,top-35),min(img.width,right+35),min(img.height,bottom+35)))
 img.thumbnail((w-35,h-75));canvas.paste(img,(x+(w-img.width)//2,y+60+(h-70-img.height)//2))
panel('assembly.png',(45,165),(1130,1010),'总装：红色为新增角码')
panel('motor_corner_top.png',(1225,165),(1130,1010),'电机端局部：2020、3030 与新增角码')
d.rounded_rectangle((45,1205,2355,1710),radius=18,fill='white',outline='#d9e0e9',width=2)
d.text((75,1225),'静态几何检查与说明',font=f(32),fill='#20344c')
rows=['① 新角码与原电机角码的最小模型间距约 1 mm；实物误差、螺丝与工具空间仍需核对。',
 '② 新角码与电机本体约 20 mm、与蓝色编码器支架约 22.15 mm；以上均为简化模型测量。',
 '③ 角码与两根型材表面相贴，接触处距离为零；筛查未发现新增实体的正体积重叠。',
 '④ 型材 T 槽、螺丝及滑块螺母未建；长孔宽按 5.5 mm 假设，安装与强度需实物验证。',
 '⑤ 灯光开关和接线为估计包络，本图不能确认其真实外形或运动时的干涉。']
for i,s in enumerate(rows):d.text((75,1290+i*66),s,font=f(25),fill='#9b4939' if i>=3 else '#30445b')
canvas.save(O/'电机角码_3030加长_3D装配示意.png')