Now correctly draws lasers behind and in front of mirrors. Phew.

robotgame/laser.py

@@ -29,17 +29,20 @@ import pygame
 import worldobject
 
 class Laser(worldobject.WorldObject):
-    def __init__(self, level, p0, p1, laser_direction):
+    def __init__(self, level, line):
         self.__dict__.update(locals())
-        worldobject.WorldObject.__init__(self, level, p0[0], max(p0[1], p1[1]) + 48)
+        (self.x0, self.y0), (self.x1, self.y1) = line
+        self.x0d, self.y0d, self.x1d, self.y1d \
+            = self.x0 * 64, (self.y0 + 4) * 48, self.x1 * 64, (self.y1 + 4) * 48
+        worldobject.WorldObject.__init__(self, level, self.x0d,
+                                         max(self.y0d, self.y1d))
 
     def update(self, e, t, dt):
 
         worldobject.WorldObject.update(self, e, t, dt)
 
     def draw(self, window):
-        (x0, y0), (x1, y1) = self.p0, self.p1
         pygame.draw.line(window, (255, 0, 0),
-                         (x0 - self.level.camera_x + 32, y0 + 4 - self.level.camera_y),
+                         (self.x0d - self.level.camera_x + 32, self.y0d - 46 - self.level.camera_y),
-                         (x1 - self.level.camera_x + 32, y1 + 4 - self.level.camera_y), 4)
+                         (self.x1d - self.level.camera_x + 32, self.y1d - 46 - self.level.camera_y), 2)
 

robotgame/level4.py

@@ -24,6 +24,8 @@
 The fourth level.
 """
 
+from __future__ import print_function
+
 import os
 import pygame
 import random
@@ -35,8 +37,8 @@ import player
 import tile
 import block
 import lever
-import mirror
+from mirror import Mirror
-import laser
+from laser import Laser
 import misc
 import worldobject
 
@@ -60,12 +62,19 @@ class Level4(level.Level):
 
         self.playfield = lm.generate_simple_playfield(16)
 
+
+        # self.playfield = {
+        #     (0, 0): lm.Source(Down),
+        #     (0, 4): lm.MirrorRight,
+        #     (4, 4): lm.MirrorLeft
+        #     }
+        
         for (x, y), t in self.playfield.items():
             x1, y1 = 64 * x, 48 * (y + 4)
             if isinstance(t, lm.Source):
                 self.objects.append(block.Block(
                         self, x1, y1,
-                        self.imgs['lasersource_' + t.direction.to_str().lower()],
+                        self.imgs['lasersource_' + t.direction.to_str()],
                         movable=False))
                 continue
             def mir(b, x1, y1):
@@ -76,7 +85,7 @@ class Level4(level.Level):
                             else lm.MirrorRight
                         self.generate_lasers()
                     return g
-                return mirror.Mirror(self, x1, y1, b, links=[f(x, y)])
+                return Mirror(self, x, y, b, links=[f(x, y)])
             self.objects.append({
                 lm.MirrorLeft: mir(True, x1, y1),
                 lm.MirrorRight: mir(False, x1, y1),
@@ -90,7 +99,7 @@ class Level4(level.Level):
                 lm.Blocker: block.Block(self, x1, y1, self.imgs['block1'],
                                         movable=False)
             }[t])
-        mirrors = list(filter(lambda obj: isinstance(obj, mirror.Mirror),
+        mirrors = list(filter(lambda obj: isinstance(obj, Mirror),
                               self.objects))
         levers = list(filter(lambda obj: isinstance(obj, lever.Lever),
                              self.objects))
@@ -126,17 +135,14 @@ class Level4(level.Level):
 
     def generate_lasers(self):
         self.lasers_orig = lm.generate_lasers(self.playfield)
-        self.lasers = []
+        self.lasers = [Laser(self, line) for line in self.lasers_orig]
-        for ((x0, y0), (x1, y1)), direc in self.lasers_orig:
-            self.lasers.append(laser.Laser(
-                    self, (x0 * 64, y0 * 48),
-                    (x1 * 64, y1 * 48), direc))
 
     def draw(self, window):
         self._blit_background(window)
 
         objs = self._sorted_objs(self.objects + self.lasers)
-        objs = self._after_sort(itertools.groupby(objs, lambda obj: obj.y + obj.z))
+        objs = self._after_sort(itertools.groupby(
+                objs, lambda obj: obj.y + obj.z))
         for obj in objs:
             obj.draw(window)
 
@@ -149,23 +155,88 @@ class Level4(level.Level):
         return n_objs
 
     def _after_sort_line(self, objs):
-        is_special = lambda obj: isinstance(obj, mirror.Mirror) or isinstance(obj, laser.Laser)
+        is_special = lambda obj: isinstance(obj, Mirror) \
-        specials, nonspecials = filter(is_special, objs), filter(lambda obj: not is_special(obj), objs)
+            or isinstance(obj, Laser)
+        specials, nonspecials = (filter(is_special, objs),
+                                 filter(lambda obj: not is_special(obj), objs))
         return nonspecials + self._sort_line_specials(specials)
 
     def _sort_line_specials(self, objs):
-        mirrors = filter(lambda obj: isinstance(obj, mirror.Mirror), objs)
+        mirrors = filter(lambda obj: isinstance(obj, Mirror), objs)
-        lasers = filter(lambda obj: isinstance(obj, laser.Laser), objs)
+        lasers = filter(lambda obj: isinstance(obj, Laser), objs)
-        return mirrors + lasers
+        # for m in mirrors:
-        
+        #     print(m.x0, m.y0)
-def _is_laser_behind_mirror(mirror_direc, laser_direc):
+        # print()
-    return {
+        # for l in lasers:
-        (Left, Up): True,
+        #     print((l.x0, l.y0), (l.x1, l.y1))
-        (Left, Left): True,
+        # print()
-        (Left, Down): False,
+
-        (Left, Right): False,
+        lasers_back = set(lasers)
-        (Right, Up): True,
+        sep_ords = []
-        (Right, Right): True,
+        for mirror in mirrors:
-        (Right, Down): False,
+            before, after = [], []
-        (Right, Left): False
+            for laser in _hit_lasers(mirror, lasers):
-        }[(mirror_direc, laser_direc)]
+                lasers_back.discard(laser)
+                if _mirror_is_behind_laser(mirror, laser):
+                    after.append(laser)
+                else:
+                    before.append(laser)
+            # for b in before:
+            #     print(b.x0, b.y0, b.x1, b.y1)
+            # print(after)
+            # print()
+            sep_ords.append(before + [mirror] + after)
+        mirror_ps = [(mirror.x0, mirror.y0) for mirror in mirrors]
+        for laser in filter(lambda laser: (laser.x0, laser.y0) in mirror_ps
+                            and (laser.x1, laser.y1) in mirror_ps, lasers):
+            # print(laser)
+            xs, ys = filter(lambda sep_ord: laser in sep_ord, sep_ords)
+            sep_ords.remove(xs)
+            sep_ords.remove(ys)
+
+            xs, ys, nobjs = iter(xs), iter(ys), []
+            while True:
+                x = next(xs)
+                if x is laser:
+                    break
+                nobjs.append(x)
+            while True:
+                x = next(ys)
+                if x is laser:
+                    break
+                nobjs.append(x)
+
+            nobjs.append(laser)
+            nobjs.extend(xs)
+            nobjs.extend(ys)
+            sep_ords.append(nobjs)
+
+        objs = list(itertools.chain(*sep_ords)) + list(lasers_back)
+        return objs
+
+def _hit_lasers(mirror, lasers):
+    p = (mirror.x0, mirror.y0)
+    return filter(lambda laser: (laser.x0, laser.y0) == p
+                  or (laser.x1, laser.y1) == p, lasers)
+
+    
+def _mirror_is_behind_laser(mirror, laser):
+    return \
+        laser.y0 == laser.y1 \
+        and (
+        (mirror.left_up
+         and (
+                    (laser.x0 == mirror.x0 and laser.x1 > mirror.x0)
+                    or
+                    (laser.x1 == mirror.x0 and laser.x0 > mirror.x0)
+                    )
+         ) \
+            or \
+        (not mirror.left_up
+         and (
+                    (laser.x0 == mirror.x0 and laser.x1 < mirror.x0)
+                    or
+                    (laser.x1 == mirror.x0 and laser.x0 < mirror.x0)
+                    )
+         )
+        )

robotgame/loader.py

@@ -52,7 +52,8 @@ class Loader(object):
                     self.directory, 'tiles', 'indoor', 'ground%02d.png' % o))
 
         l = ['block1', 'block1_lifted', 'block3', '../lasertarget',
-             '../lasersource_up', '../lasersource_down', '../lasersource_right']
+             '../lasersource_up', '../lasersource_down', '../lasersource_right',
+             '../lasertarget_glow']
         for o in l:
             self.imgs[os.path.basename(o)] = pygame.image.load(os.path.join(
                     self.directory, 'blocks', '%s.png' % o))

robotgame/logic/lasermirror.py

@@ -157,28 +157,34 @@ def generate_lasers(playfield):
     Return [((x, y), direction), ...]
     """
     width, height = 16, 16
-    sources = ((pos, obj.direction) for pos, obj in filter(lambda posobj: isinstance(posobj[1], Source), playfield.items()))
+    sources = ((pos, obj.direction) for pos, obj
+               in filter(lambda posobj: isinstance(posobj[1], Source),
+                         playfield.items()))
     lasers = []
+    def add(start, end):
+        t = (min(start, end), max(start, end))
+        if not t in lasers:
+            lasers.append(t)
     for start, direc in sources:
         end = start
         while True:
             cur = playfield.get(end)
             if cur is Target:
-                lasers.append(((start, end), direc))
+                add(start, end)
                 break
             if cur is Blocker:
-                lasers.append(((start, end), direc))
+                add(start, end)
                 break
             if cur in (MirrorLeft, MirrorRight):
                 if (start, end) in ((start, end) for (start, end), direc in lasers):
                     break
-                lasers.append(((start, end), direc))
+                add(start, end)
                 direc = _mirror_new_direc(cur, direc)
                 start = end
             new_end = direc.next_pos(end)
-            if new_end[0] < 0 or new_end[1] < 0 or new_end[0] >= width or new_end[1] >= height:
+            if new_end[0] < 0 or new_end[1] < 0 or \
-                if (start, end) not in lasers:
+                    new_end[0] >= width or new_end[1] >= height:
-                    lasers.append(((start, new_end), direc))
+                add(start, new_end)
                 break
             end = new_end
     return lasers

robotgame/mirror.py

@@ -29,9 +29,10 @@ import pygame
 import worldobject
 
 class Mirror(worldobject.WorldObject):
-    def __init__(self, level, x, y, left_up=True, links=[]):
+    def __init__(self, level, x0, y0, left_up=True, links=[]):
         self.__dict__.update(locals())
-        worldobject.WorldObject.__init__(self, level, x, y)
+        self.xd, self.yd = self.x0 * 64, (self.y0 + 4) * 48
+        worldobject.WorldObject.__init__(self, level, self.xd, self.yd)
 
         self.in_rotation = False
         self.left_up_aim = self.left_up
@@ -62,6 +63,6 @@ class Mirror(worldobject.WorldObject):
     def draw(self, window):
         fn = self.frame + 1 if not self.left_up_aim else self.frame + self._half_anim_len
         self.img = self.level.imgs['mirror'][int(fn)]
-        window.blit(self.img, (self.x - 32 - self.level.camera_x,
+        window.blit(self.img, (self.xd - 32 - self.level.camera_x,
-                               self.y - self.img.get_size()[1] + 24
+                               self.yd - self.img.get_size()[1] + 24
                                - self.level.camera_y))