Source Code for Module libavg.trackerhelper

 1  import math 
 2  from . import avg, Point2D, RasterNode 
 3   
 4  g_player = avg.Player.get() 
 5   
 6 -class TrackerImageFlipper: 
 7 -    def __init__(self): 
 8          self.readConfig() 
 9   
10 -    def readConfig(self): 
11          global g_tracker 
12          print "reading tracker config" 
13          g_tracker = g_player.getTracker() 
14          trackerAngle = float(g_tracker.getParam('/transform/angle/@value')) 
15          self.angle = round(trackerAngle/math.pi) * math.pi 
16          self.flipX = 0 > float(g_tracker.getParam('/transform/displayscale/@x')) 
17          self.flipY = 0 > float(g_tracker.getParam('/transform/displayscale/@y')) 
18   
19 -    def transformPos(self, (x, y)): 
20          if self.flipX: 
21              x = 1 - x 
22          if self.flipY: 
23              y = 1 - y 
24          return (x, y) 
25   
26 -    def flipNode(self, node): 
27          node.angle = self.angle 
28          grid = node.getOrigVertexCoords() 
29          grid = [ [ self.transformPos(pos) for pos in line ] for line in grid] 
30          node.setWarpedVertexCoords(grid) 
31   
32 -    def loadTrackerImage(self, node, imageID): 
33          fingerBitmap = g_tracker.getImage(imageID) 
34          node.setBitmap(fingerBitmap) 
35          self.flipNode(node) 
36