Source Code for Module SmootLight.pixelmappers.GaussianMapper

 1  from operationscore.PixelMapper import * 
 2  import util.Geo as Geo 
 3 -class GaussianMapper(PixelMapper): 
 4      """GaussianMapper is a PixelMapper which weights pixels around an event proportional to a 
 5      gaussian surface.  Specify: 
 6      <Height> -- The height of the gaussian surface 
 7      <Width> -- The width of the gaussian surface 
 8      <MinWeight> -- the minimum weight event that can be returned 
 9      <CutoffDist> -- the maximum radius considered 
10      """ 
11   
12 -    def mappingFunction(self, eventLocation, screen): 
13          returnPixels = []  
14          [x,y] = eventLocation 
15          potentialPixels = screen.pixelsInRange(x-self.CutoffDist, \ 
16                  x+self.CutoffDist) 
17          for (x,pixel) in screen.pixelsInRange(x-self.CutoffDist, \ 
18                  x+self.CutoffDist): 
19              pixelDist = Geo.dist(pixel.location, eventLocation) 
20              if pixelDist < self.CutoffDist: 
21                  w = Geo.gaussian(pixelDist, self.Height, 0, self.Width) 
22                  if w > self.MinWeight: 
23                      returnPixels.append((pixel, w)) 
24          return returnPixels 
25