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from operationscore.PixelMapper import *
import util.Geo as Geo
import sys
class SimpleMapper(PixelMapper):
"""SimpleMapper is a PixelMapper which maps events to the nearest Pixel. It also supports
strings of the form:
{x}>5, {y}<10, {x}*{y}<{x}, etc. (Conditons, separated by commas. and and or may also be
used)."""
def mappingFunction(self, eventLocation, screen):
if type(eventLocation) == type(tuple()):
bestDist = sys.maxint
bestPixel = None
[x,y] = eventLocation
for (x,pixel) in screen.pixelsInRange(x-self['CutoffDist'], \
x+self['CutoffDist']):
pixelDist = Geo.dist(pixel.location, eventLocation)
if pixelDist < bestDist:
bestPixel = pixel
bestDist = pixelDist
if bestPixel != None:
return [(bestPixel,1)]
else:
return []
else:
#{x}>5,{y}<k
ret = []
eventLocation = eventLocation.replace('{x}', 'pixel.location[0]')
eventLocation = eventLocation.replace('{y}', 'pixel.location[1]')
conditions = eventLocation.split(',')
conditionLambdas = [eval('lambda pixel:'+condition) for condition in conditions]
for pixel in screen:
try:
pixelValid = True
for p in conditionLambdas:
if p(pixel) == False:
pixelValid = False
continue
if pixelValid:
ret.append((pixel, 1))
except Exception as exp:
raise Exception('Bad event condition')
return ret
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