X-Git-Url: https://git.ctpug.org.za/?p=tabakrolletjie.git;a=blobdiff_plain;f=tabakrolletjie%2Frays.py;h=a475d8fb27bb6c680a90555cad7dc2a4f6043954;hp=65fbc3d628b19de13a237124c89f73484ab5e5a5;hb=3341713feb17c2469631de0ef6078e5a4473b28c;hpb=2b7c4e798a22d0f646061c044678f0e2e7c590d9

diff --git a/tabakrolletjie/rays.py b/tabakrolletjie/rays.py
index 65fbc3d..a475d8f 100644
--- a/tabakrolletjie/rays.py
+++ b/tabakrolletjie/rays.py
@@ -12,7 +12,7 @@ from .constants import SCREEN_SIZE
 from .utils import debug_timer
 
 
-def screen_rays(pos):
+def screen_rays():
     """ An iterable that returns ordered rays from pos to the edge of the
         screen, starting with the edge point (0, 0) and continuing clockwise
         in pymunk coordinates.
@@ -40,7 +40,7 @@ def calculate_ray_polys(space, position, light_filter):
     vertices = [position]
     start, end = None, None
     ray_polys = []
-    for ray in screen_rays(position):
+    for ray in screen_rays():
         info = space.segment_query_first(position, ray, 1, light_filter)
         point = ray if info is None else info.point
         vertices.append(point)
@@ -84,9 +84,12 @@ 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)
+        if direction:
+            self.direction = direction  # Update direction
         self._max_radius = None  # maximum radius in pixels
         self._min_radius = None  # minimum radius in pixels
         self._set_radius_limits(radius_limits)
@@ -127,7 +130,7 @@ class RayPolyManager(object):
         self._min_radius = value or 0.0
 
     def reaches(self, position):
-        distance = self.position.get_distance(self.position)
+        distance = self.position.get_distance(position)
         return (self._min_radius <= distance <= self._max_radius)
 
     def _set_radius_limits(self, radius_limits):
@@ -141,21 +144,37 @@ 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):
+        if self._direction is None:
+            return 0
+        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):