--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/cylindertransport.py Sun Apr 02 23:59:00 2017 +0200
@@ -0,0 +1,133 @@
+from math import sqrt
+from PIL import Image, ImageDraw, ImageFont
+import argparse, sys
+
+# pfad zu den TTF files (arial.ttf)
+FONTBASE = "/usr/share/fonts/truetype/msttcorefonts/"
+
+SPACE_MIN = 10 # minimum offset between bottles
+
+# Durchmesser, Laenge, Volumen und Gewicht der verfuegbaren Tauchflaschen
+CYLINDER = {
+ "03" : [100, 515, 3, 4.7],
+ "05" : [140, 466, 5, 5.7],
+ "07" : [140, 605, 7, 8.8],
+ "08" : [171, 490, 8, 10.4],
+ "10" : [171, 595, 10, 12.4],
+ "12S" : [204, 550, 12, 15.4],
+ "12L" : [171, 690, 12, 14.5],
+ "15" : [204, 640, 15, 18.1],
+}
+
+PIPES = [
+ ["DN8", 13.5],
+ ["DN10", 17.2],
+ ["DN15", 21.3],
+ ["DN20", 26.9],
+ ["DN25", 33.7],
+ ["DN32", 42.4],
+ ["DN40", 48.3],
+ ["DN50", 60.3],
+ ["DN65", 76.1],
+ ["DN80", 88.9],
+ ["DN100", 114.3],
+ ["DN125", 139.7],
+ ["DN150", 168.3],
+]
+
+
+
+def offset(r1, r2):
+ o = (2*sqrt(r1*r2))
+ #print "offset %i" % o
+ return o
+
+def calc_min(r1, r2):
+ # stupider annaehreungsversuch, bis sich die beiden Tauchflaschen r1 und r2 nicht mehr beruehren
+ #print "r1=%.0f r2=%.0f" % (r1, r2)
+ for p in PIPES:
+ i = p[1] / 2
+ if i>r1 or i>r2:
+ print "spacer radius > r1 or r2, abort"
+ return None
+ x1 = offset(r1, i)
+ x2 = offset(r2, i)
+ x = (x1 + x2) - (r1+r2)
+ if x >= SPACE_MIN:
+ print "%s Pipe (%.1fmm), Cylinder spacing: %imm" % (p[0], p[1], x)
+ return [r1, i, r2, p[0]]
+ return None
+
+def circ(draw, x, r, txt = "", txtfactor = 1.0):
+ draw.arc([x-r, 0, x + r, 2 * r], 0, 360, 'white')
+ if txt != "":
+ font = ImageFont.truetype(FONTBASE+"arial.ttf", int(24*txtfactor))
+ tox, toy = draw.textsize(txt, font=font)
+ draw.text((x-tox/2, r-toy/2), txt, font=font, fill='#ffffff')
+
+
+def draw_bottles(draw, args):
+ bottles = args.cylinders
+ SPACE_MIN = args.space_min
+
+ spacerY1 = 200
+ spacerY2 = 220
+ # first bottle spacer
+ r1 = CYLINDER[bottles[0]][0] / 2
+ r2 = CYLINDER[bottles[1]][0] / 2
+ x = 20 + r1 # start offset x
+ r1, r2, r3, dn = calc_min(r1, r2)
+ circ(draw, x, r2, dn, 0.5)
+ x = x + offset(r2, r3)
+
+ for i in range(0, len(bottles)-1):
+ r1 = CYLINDER[bottles[i]][0] / 2
+ r2 = CYLINDER[bottles[i+1]][0] / 2
+ r1, r2, r3, dn = calc_min(r1, r2)
+ # draw bottle
+ circ(draw, x, r1, "Tank "+bottles[i])
+ sx1 = x+r1
+ x = x + offset(r1, r2)
+ # draw right spacer
+ circ(draw, x, r2, dn, 0.5)
+ x = x + offset(r2, r3)
+ sx2 = x-r3
+ if i == (len(bottles)-2):
+ # draw last bottle
+ circ(draw, x, r3, "Tank "+bottles[i+1])
+ x = x + offset(r2, r3)
+ # draw the space between bottles
+ draw.line((sx1, spacerY1, sx1, spacerY2), fill='#ffffff')
+ draw.line((sx2, spacerY1, sx2, spacerY2), fill='#ffffff')
+ txt = "%imm" % (sx2-sx1)
+ font = ImageFont.truetype(FONTBASE+"arial.ttf", 12)
+ tox, toy = draw.textsize(txt, font=font)
+ draw.text((sx1+(sx2-sx1)/2-(tox/2), spacerY2+toy/2), txt, font=font, fill='#ffffff')
+
+ # last bottle spacer
+ circ(draw, x, r2, dn, 0.5)
+
+def getimage(args):
+ image = Image.new('1', (1000, 250)) #create new image, 1000x500 pixels, 1 bit per pixel
+ draw = ImageDraw.Draw(image)
+ draw_bottles(draw, args)
+ return image
+
+if __name__ == "__main__":
+ parser = argparse.ArgumentParser(description="Calculate spacer pipes for pressure cylinder transport\n" +
+ "Known cylinder types:\n" + ", ".join(sorted(CYLINDER.keys())) )
+ parser.add_argument('cylinders', metavar='cylinder', type=str, nargs='+',
+ help='cylinder types')
+ parser.add_argument('--space', dest='space_min', type=int,
+ default=SPACE_MIN,
+ help='minimum space between cylinders (mm)')
+
+ args = parser.parse_args()
+
+ for test in args.cylinders:
+ if not test in CYLINDER.keys():
+ print "Cylinder type '%s' is unknown" % test
+ sys.exit(1)
+
+ image = getimage(args)
+ image.show()
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