建立方向盘项目初始版本

scripts/render_kfl_plate_v3_alt.py

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+"""Draw a clearly provisional dimension diagram for the KFL001 plate."""
+from pathlib import Path
+from reportlab.pdfgen import canvas
+from reportlab.lib.pagesizes import landscape,A4
+from reportlab.pdfbase import pdfmetrics
+from reportlab.pdfbase.ttfonts import TTFont
+from reportlab.lib.colors import HexColor
+import pypdfium2
+import math
+
+out=Path(r'C:\projects\wheel\models\kfl001_plate_v3_alt')
+pdfmetrics.registerFont(TTFont('Chinese',r'C:\Windows\Fonts\simhei.ttf'))
+p=out/'KFL001固定板_尺寸图.pdf'
+c=canvas.Canvas(str(p),pagesize=landscape(A4));W,H=landscape(A4)
+c.setTitle('KFL001 mounting plate V3 - prototype')
+def txt(x,y,t,size=11,color='#17202a'):
+ c.setFillColor(HexColor(color));c.setFont('Chinese',size);c.drawString(x,y,t)
+def ln(x1,y1,x2,y2,col='#444444',width=.7):
+ c.setStrokeColor(HexColor(col));c.setLineWidth(width);c.line(x1,y1,x2,y2)
+def tick(x,y):ln(x-3,y-3,x+3,y+3)
+
+txt(36,555,'KFL001 固定板尺寸图 V3',23)
+txt(36,532,'试制版：中心孔直径 39，适配直径 38 凸起',13,'#B42318')
+txt(36,512,'两块几何相同；厚 8 mm；下方尺寸单位均为 mm',11)
+k=3.6;x0=110;y0=125;w=76*k;h=75*k;cx=x0+w/2;cy=y0+51*k
+c.setFillColor(HexColor('#eef2f6'));c.setStrokeColor(HexColor('#263444'));c.setLineWidth(1.1)
+# Exterior as manufactured: R3 tangent corners and R60 arch, symmetric around x=38.
+path=c.beginPath();path.moveTo(x0+3*k,y0);path.lineTo(x0+73*k,y0)
+def arc_poly(cx0,cy0,r,a0,a1,n=20):
+ for j in range(1,n+1):
+  a=math.radians(a0+(a1-a0)*j/n)
+  path.lineTo(x0+(cx0+r*math.cos(a))*k,y0+(cy0+r*math.sin(a))*k)
+arc_poly(73,3,3,-90,0)
+y_corner=15+math.sqrt(57**2-35**2)
+path.lineTo(x0+76*k,y0+y_corner*k)
+theta=math.degrees(math.atan2(y_corner-15,35))
+arc_poly(73,y_corner,3,0,theta)
+arc_poly(38,15,60,theta,180-theta,80)
+arc_poly(3,y_corner,3,180-theta,180)
+path.lineTo(x0,y0+3*k)
+arc_poly(3,3,3,180,270)
+path.close();c.drawPath(path,fill=1,stroke=1)
+c.setFillColor(HexColor('#ffffff'));c.setStrokeColor(HexColor('#263444'));c.setLineWidth(1.0)
+c.circle(cx,cy,19.5*k,stroke=1,fill=1)
+for xx in (-24,24):c.circle(cx+xx*k,cy,3.5*k,stroke=1,fill=1)
+for xx in (-23.5,23.5):c.roundRect(cx+(xx-4.75)*k,y0+(9-2.75)*k,9.5*k,5.5*k,2.75*k,stroke=1,fill=1)
+c.setDash(4,3);ln(cx-23*k,cy,cx+23*k,cy,'#858b93',.5);ln(cx,cy-23*k,cx,cy+23*k,'#858b93',.5);c.setDash()
+# Outside dimensions: overall width, height, axis height and KFL bolt pitch.
+for x in (x0,x0+w):ln(x,y0-3,x,y0-31)
+ln(x0,y0-23,x0+w,y0-23);tick(x0,y0-23);tick(x0+w,y0-23);txt(cx-8,y0-19,'76',10)
+for y in (y0,y0+h):ln(x0-2,y,x0-38,y)
+ln(x0-30,y0,x0-30,y0+h);tick(x0-30,y0);tick(x0-30,y0+h);txt(x0-50,y0+h/2,'75',10)
+ln(x0+w+10,y0,x0+w+38,y0);ln(x0+w+10,cy,x0+w+38,cy)
+ln(x0+w+30,y0,x0+w+30,cy);tick(x0+w+30,y0);tick(x0+w+30,cy);txt(x0+w+34,y0+(cy-y0)/2,'51',10)
+by=cy+30*k
+for x in (cx-24*k,cx+24*k):ln(x,cy+4*k,x,by+4)
+ln(cx-24*k,by,cx+24*k,by);tick(cx-24*k,by);tick(cx+24*k,by);txt(cx-8,by+5,'48',10)
+txt(472,454,'孔位说明',15)
+for i,t in enumerate(['1  中心孔：直径 39，适配直径 38 凸起','2  两侧轴承孔：直径 7，孔距 48','3  底部两槽：9.5 × 5.5，横向','4  两槽中心距 47，槽心距底边 9','5  上边圆弧 R60，圆心距底 15','6  平面过渡 R3；外轮廓双面 C1','7  中心孔到轴承孔边名义余量仅 1','8  直径 12 垫圈向中心孔悬出约 1.5']):txt(472,424-i*24,t,11,'#B42318' if i in (6,7) else '#17202a')
+ln(472,217,805,217,'#b9c0c9');txt(472,196,'轴承及连接件先试装，',11,'#B42318');txt(472,178,'紧固和动态强度需实物验证。',11,'#B42318')
+txt(36,42,'注：圆孔和长槽均贯穿；两块相同。按孔心尺寸加工，无螺纹。',10)
+c.showPage();c.save()
+doc=pypdfium2.PdfDocument(str(p));page=doc[0];page.render(scale=1.6).to_pil().save(str(out/'KFL001固定板_尺寸图.png'))