mirror of https://github.com/rusefi/gerbmerge.git
378 lines
14 KiB
Python
378 lines
14 KiB
Python
#!/usr/bin/env python
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"""A tiling is an arrangement of jobs, where each job may
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be a copy of another and may be rotated. A tiling consists
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of two things:
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- a list of where each job is located (the lower-left of
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each job is the origin)
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- a list of points that begins at (0,Ymax) and ends at
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(Xmax,0). These points describe the outside boundary
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of the tiling.
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--------------------------------------------------------------------
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This program is licensed under the GNU General Public License (GPL)
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Version 3. See http://www.fsf.org for details of the license.
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Rugged Circuits LLC
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http://ruggedcircuits.com/gerbmerge
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"""
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import sys
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import math
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import config
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import jobs
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# Helper functions to determine if points are right-of, left-of, above, and
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# below each other. These definitions assume that points are on a line that
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# is vertical or horizontal.
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def left_of(p1,p2):
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return p1[0]<p2[0] and p1[1]==p2[1]
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def right_of(p1,p2):
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return p1[0]>p2[0] and p1[1]==p2[1]
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def above(p1,p2):
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return p1[1]>p2[1] and p1[0]==p2[0]
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def below(p1,p2):
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return p1[1]<p2[1] and p1[0]==p2[0]
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class Tiling:
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def __init__(self, Xmax, Ymax):
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# Make maximum dimensions bigger by inter-job spacing so that
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# we allow jobs (which are seated at the lower left of their cells)
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# to just fit on the panel, and not disqualify them because their
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# spacing area slightly exceeds the panel edge.
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self.xmax = Xmax + config.Config['xspacing']
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self.ymax = Ymax + config.Config['yspacing']
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self.points = [(0,Ymax), (0,0), (Xmax,0)] # List of (X,Y) co-ordinates
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self.jobs = [] # List of 3-tuples: ((Xbl,Ybl),(Xtr,Ytr),Job) where
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# (Xbl,Ybl) is bottom left, (Xtr,Ytr) is top-right of the cell.
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# The actual job has dimensions (Xtr-Xbl-Config['xspacing'],Ytr-Ybl-Config['yspacing'])
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# and is located at the lower-left of the cell.
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def canonicalize(self, OriginX, OriginY):
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"""Return a list of JobLayout objects, after setting each job's (X,Y) origin"""
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L = []
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for job in self.jobs:
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J = jobs.JobLayout(job[2])
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J.setPosition(job[0][0]+OriginX, job[0][1]+OriginY)
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L.append(J)
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return L
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def corners(self):
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return len(self.points)-2
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def clone(self):
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T = Tiling(self.xmax-config.Config['xspacing'], self.ymax-config.Config['yspacing'])
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T.points = self.points[:]
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T.jobs = self.jobs[:]
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return T
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def dump(self, fid=sys.stdout):
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fid.write("Points:\n ")
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count = 0
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for XY in self.points:
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fid.write("%s " % str(XY))
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count += 1
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if count==8:
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fid.write("\n ")
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count=0
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if count:
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fid.write("\n")
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fid.write("Jobs:\n")
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for bl,tr,Job in self.jobs:
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fid.write(" %s: %s\n" % (str(Job), str(bl)))
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def joblist(self, fid=sys.stdout):
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for bl,tr,Job in self.jobs:
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fid.write("%s@(%.1f,%.1f) " % (Job.name,bl[0],bl[1]))
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fid.write('\n')
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def isOverlap(self, ix, X, Y, cfg=config.Config):
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"""Determines if a new job with actual dimensions X-by-Y located at self.points[ix]
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overlaps any existing job or exceeds the boundaries of the panel.
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If it's an L-point, the new job will have position
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p_bl=(self.points[ix][0],self.points[ix][1])
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and top-right co-ordinate:
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p_tr=(self.points[ix][0]+X,self.points[ix][1]+Y)
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If it's a mirror-L point, the new job will have position
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p_bl=(self.points[ix][0]-X,self.points[ix][1])
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and top-right co-ordinate:
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p_tr=(self.points[ix][0],self.points[ix][1]+Y)
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For a test job defined by t_bl and t_tr, the given job overlaps
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if:
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p.left_edge<t.right_edge and p.right_edge>t.left_edge
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and
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p.bottom_edge<t.top_edge and p.top_edge>t.bottom_edge
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"""
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if self.isL(ix):
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p_bl = self.points[ix]
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p_tr = (p_bl[0]+X, p_bl[1]+Y)
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if p_tr[0]>self.xmax or p_tr[1]>self.ymax:
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return 1
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else:
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p_bl = (self.points[ix][0]-X,self.points[ix][1])
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p_tr = (self.points[ix][0],self.points[ix][1]+Y)
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if p_bl[0]<0 or p_tr[1]>self.ymax:
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return 1
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for t_bl,t_tr,Job in self.jobs:
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if p_bl[0]<t_tr[0] and p_tr[0]>t_bl[0] \
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and \
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p_bl[1]<t_tr[1] and p_tr[1]>t_bl[1]:
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return 1
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return 0
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def isL(self, ix):
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"""True if self.points[ix] represents an L-shaped corner where there
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is free space above and to the right, like this:
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+------+ _____ this point is an L-shaped corner
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| | /
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| +______+
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. .
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. .
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. .
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"""
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pts = self.points
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# This is an L-point if:
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# Previous point X co-ordinates are the same, and
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# previous point Y co-ordinate is higher, and
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# next point Y co-ordinate is the same, and
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# next point X co-ordinate is to the right
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return pts[ix-1][0]==pts[ix][0] \
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and pts[ix-1][1]>pts[ix][1] \
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and pts[ix+1][1]==pts[ix][1] \
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and pts[ix+1][0]>pts[ix][0]
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def isMirrorL(self, ix):
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"""True if self.points[ix] represents a mirrored L-shaped corner where there
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is free space above and to the left, like this:
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+------+
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mirrored-L corner __ | |
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\ | |
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+______+ |
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. .
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. .
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. .
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"""
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pts = self.points
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# This is a mirrored L-point if:
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# Previous point Y co-ordinates are the same, and
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# previous point X co-ordinate is lower, and
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# next point X co-ordinate is the same, and
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# next point X co-ordinate is higher
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return pts[ix-1][1]==pts[ix][1] \
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and pts[ix-1][0]<pts[ix][0] \
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and pts[ix+1][0]==pts[ix][0] \
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and pts[ix+1][1]>pts[ix][1]
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def validAddPoints(self, X, Y):
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"""Return a list of all valid indices into self.points at which we can add
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the job with dimensions X-by-Y). Only points which are either L-points or
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mirrored-L-points and which would support the given job with no overlaps
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are returned.
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"""
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return [ix for ix in range(1,len(self.points)-1) if (self.isL(ix) or self.isMirrorL(ix)) and not self.isOverlap(ix,X,Y)]
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def mergePoints(self, ix):
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"""Inspect points self.points[ix] and self.points[ix+1] as well
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as self.points[ix+3] and self.points[ix+4]. If they are the same, delete
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both points, thus merging lines formed when the corners of two jobs coincide.
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"""
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# Do farther-on points first so we can delete things right from the list
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if self.points[ix+3]==self.points[ix+4]:
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del self.points[ix+3:ix+5]
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if self.points[ix]==self.points[ix+1]:
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del self.points[ix:ix+2]
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# Experimental
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def removeInlets(self, minSize):
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"""Find sequences of 3 points that define an "inlet", either a left/right-going gap:
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...---------------+ +--------.....
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+------------+ +------------+
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+----------------------+ +--------------------+
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. .
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. .
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. .
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or a down-going gap: +-------.....
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...-----------+ ...-------------+ |
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| +-----.... | |
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+--+ +--+
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that are too small for any job to fit in (as defined by minSize). These inlets
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can be deleted to form corners where new jobs can be placed.
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"""
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pt = self.points
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done = 0
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while not done:
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# Repeat this loop each time there is a change
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for ix in range(0, len(pt)-3):
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# Check for horizontal left-going inlet
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if right_of(pt[ix],pt[ix+1]) and above(pt[ix+1],pt[ix+2]) and left_of(pt[ix+2],pt[ix+3]):
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# Make sure minSize requirement is met
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if pt[ix][1]-pt[ix+3][1] < minSize:
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# Get rid of middle two points, extend Y-value of highest point down to lowest point
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pt[ix] = (pt[ix][0],pt[ix+3][1])
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del pt[ix+1:ix+3]
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break
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# Check for horizontal right-going inlet
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if left_of(pt[ix],pt[ix+1]) and below(pt[ix+1],pt[ix+2]) and right_of(pt[ix+2],pt[ix+3]):
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# Make sure minSize requirement is met
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if pt[ix+3][1]-pt[ix][1] < minSize:
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# Get rid of middle two points, exten Y-value of highest point down to lowest point
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pt[ix+3] = (pt[ix+3][0], pt[ix][1])
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del pt[ix+1:ix+3]
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break
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# Check for vertical inlets
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if above(pt[ix],pt[ix+1]) and left_of(pt[ix+1],pt[ix+2]) and below(pt[ix+2],pt[ix+3]):
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# Make sure minSize requirement is met
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if pt[ix+3][0]-pt[ix][0] < minSize:
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# Is right side lower or higher?
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if pt[ix+3][1]>=pt[ix][1]: # higher?
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pt[ix] = (pt[ix+3][0], pt[ix][1]) # Move first point to the right
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else: # lower?
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pt[ix+3] = (pt[ix][0], pt[ix+3][1]) # Move last point to the left
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del pt[ix+1:ix+3]
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break
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else:
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done = 1
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def addLJob(self, ix, X, Y, Job, cfg=config.Config):
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"""Add a job to the tiling at L-point self.points[ix] with actual dimensions X-by-Y.
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The job is added with its lower-left corner at the point. The existing point
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is removed from the tiling and new points are added at the top-left, top-right
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and bottom-right of the new job, with extra space added for inter-job spacing.
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"""
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x,y = self.points[ix]
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x_tr = x+X
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y_tr = y+Y
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self.points[ix:ix+1] = [(x,y_tr), (x_tr,y_tr), (x_tr,y)]
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self.jobs.append( ((x,y),(x_tr,y_tr),Job) )
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self.mergePoints(ix-1)
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def addMirrorLJob(self, ix, X, Y, Job, cfg=config.Config):
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"""Add a job to the tiling at mirror-L-point self.points[ix] with dimensions X-by-Y.
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The job is added with its lower-right corner at the point. The existing point
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is removed from the tiling and new points are added at the bottom-left, top-left
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and top-right of the new job, with extra space added for inter-job spacing.
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"""
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x_tr,y = self.points[ix]
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x = x_tr-X
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y_tr = y+Y
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self.points[ix:ix+1] = [(x,y), (x,y_tr), (x_tr,y_tr)]
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self.jobs.append( ((x,y),(x_tr,y_tr),Job) )
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self.mergePoints(ix-1)
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def addJob(self, ix, X, Y, Job):
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"""Add a job to the tiling at point self.points[ix] and with dimensions X-by-Y.
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If the given point is an L-point, the job will be added with its lower-left
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corner at the point. If the given point is a mirrored-L point, the job will
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be added with its lower-right corner at the point.
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"""
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if self.isL(ix):
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self.addLJob(ix, X, Y, Job)
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else:
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self.addMirrorLJob(ix, X, Y, Job)
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def bounds(self):
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"""Return 2-tuple ((minX, minY), (maxX, maxY)) of rectangular region defined by all jobs"""
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minX = minY = float(sys.maxint)
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maxX = maxY = 0.0
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for bl,tr,job in self.jobs:
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minX = min(minX,bl[0])
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maxX = max(maxX,tr[0])
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minY = min(minY,bl[1])
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maxY = max(maxY,tr[1])
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return ( (minX,minY), (maxX-config.Config['xspacing'], maxY-config.Config['yspacing']) )
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def area(self):
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"""Return area of rectangular region defined by all jobs."""
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bl,tr = self.bounds()
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DX = tr[0]-bl[0]
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DY = tr[1]-bl[1]
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return DX*DY
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def usedArea(self):
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"""Return total area of just jobs, not spaces in-between."""
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area = 0.0
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for job in self.jobs:
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area += job[2].jobarea()
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return area
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# Function to estimate the maximum possible utilization given a list of jobs.
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# Jobs list is 4-tuple (Xdim,Ydim,job,rjob).
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def maxUtilization(Jobs):
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xspacing = config.Config['xspacing']
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yspacing = config.Config['yspacing']
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usedArea = totalArea = 0.0
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for Xdim,Ydim,job,rjob in Jobs:
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usedArea += job.jobarea()
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totalArea += job.jobarea()
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totalArea += job.width_in()*xspacing + job.height_in()*yspacing + xspacing*yspacing
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# Reduce total area by strip of unused spacing around top and side. Assume
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# final result will be approximately square.
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sq_side = math.sqrt(totalArea)
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totalArea -= sq_side*xspacing + sq_side*yspacing + xspacing*yspacing
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return usedArea/totalArea
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# Utility function to compute the minimum dimension along any axis of all jobs.
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# Used to remove inlets.
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def minDimension(Jobs):
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M = float(sys.maxint)
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for Xdim,Ydim,job,rjob in Jobs:
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M = min(M,Xdim)
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M = min(M,Ydim)
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return M
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# vim: expandtab ts=2 sw=2
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