def update_visible(self, viewport):
self.visible_track_segments = []
for segment in self.track_segments:
if self.segment_in_rect(segment, viewport):
self.visible_track_segments.append(segment)
self.visible_sleepers = []
for sleeper in self.sleepers:
if point_in_rect((sleeper.x, sleeper.y), viewport):
self.visible_sleepers.append(sleeper)
def update_visible(self, viewport):
self.visible = [
obj for obj in self.objects
if point_in_rect(obj.gp, viewport)]
def segment_in_rect(self, segment, rect):
point1 = segment[:2]
point2 = segment[2:]
return point_in_rect(point1, rect) or point_in_rect(point2, rect)