Add total power and damage.

[tabakrolletjie.git] / tabakrolletjie / rays.py

diff --git a/tabakrolletjie/rays.py b/tabakrolletjie/rays.py
index 65fbc3d628b19de13a237124c89f73484ab5e5a5..b4142a3e6694f8ecaeb4f67264a4bb270ca7a025 100644 (file)
--- a/tabakrolletjie/rays.py
+++ b/tabakrolletjie/rays.py
@@ -84,6 +84,7 @@ class RayPolyManager(object):
         self._position = pymunk.Vec2d(position)  # light's position
         self._ray_filter = ray_filter  # light filter
         self._rays = []  # list of RayPolys
+        self._direction = None  # normal vector for direction
         self._start = None  # normal vector in direction of start angle limit
         self._end = None  # normal vector in direction of end angle limit
         self._set_angle_limits(direction, spread)
@@ -141,21 +142,35 @@ class RayPolyManager(object):
             self._max_radius = radius_limits[1]
 
     def rotatable(self):
-        return self._start is not None
+        return self._direction is not None
 
-    def rotate_degrees(self, degrees):
-        self._start.rotate_degrees(degrees)
-        self._end.rotate_degrees(degrees)
+    @property
+    def direction(self):
+        return self._direction.angle_degrees
+
+    @direction.setter
+    def direction(self, degrees):
+        spread = self._direction.get_angle_between(self._start)
+        self._direction.angle_degrees = degrees
+        self._start = self._direction.rotated(spread)
+        self._end = self._direction.rotated(-spread)
         self._poly_cache = None
 
+    @property
+    def spread(self):
+        if not self._direction:
+            return 2 * math.pi
+        return math.fabs(self._start.get_angle_between(self._end))
+
     def _set_angle_limits(self, direction, spread):
         if direction is None or spread is None:
+            self._direction = None
             self._start = None
             self._end = None
         else:
-            n = pymunk.Vec2d(1, 0)
-            self._start = n.rotated_degrees(-spread/2.)
-            self._end = n.rotated_degrees(spread/2.)
+            self._direction = pymunk.Vec2d(1, 0)
+            self._start = self._direction.rotated_degrees(-spread/2.)
+            self._end = self._direction.rotated_degrees(spread/2.)
         self._poly_cache = None
 
     def polys(self):