From bb98345153a9111d9af5b3d24e6a00037b59b977 Mon Sep 17 00:00:00 2001
From: Neil <neil@dip.sun.ac.za>
Date: Mon, 5 Sep 2016 22:12:10 +0200
Subject: [PATCH] Add very hack'ish rotating light via pymunk thing

---
 misc/README                    |   3 +
 misc/intersecting_triangles.py | 103 +++++++++++++++++++++++++++++++++
 2 files changed, 106 insertions(+)
 create mode 100644 misc/README
 create mode 100644 misc/intersecting_triangles.py

diff --git a/misc/README b/misc/README
new file mode 100644
index 0000000..777fa16
--- /dev/null
+++ b/misc/README
@@ -0,0 +1,3 @@
+This is a collection of experimental scripts and things generated while experimenting with abusing pymunk to do what we want.
+
+Ideas which work will hopefully be integrated into the game proper.
diff --git a/misc/intersecting_triangles.py b/misc/intersecting_triangles.py
new file mode 100644
index 0000000..43cf0fc
--- /dev/null
+++ b/misc/intersecting_triangles.py
@@ -0,0 +1,103 @@
+import pymunk as p
+import pymunk.pygame_util as pgu
+import pygame
+import pygame.locals as pgl
+import pygame.draw
+import pygame.time
+
+import random
+
+
+pygame.display.set_mode((800, 600), pgl.SWSURFACE)
+pygame.display.init()
+
+step = 0.01
+#step = 0
+
+space = p.Space()
+
+shape_filter = p.ShapeFilter(mask=p.ShapeFilter.ALL_MASKS)
+s1_filter = p.ShapeFilter(mask=p.ShapeFilter.ALL_MASKS^1, categories=1)
+s2_filter = p.ShapeFilter(mask=p.ShapeFilter.ALL_MASKS^2, categories=2)
+
+b1 = p.Body(0, 0, p.Body.STATIC)
+b2 = p.Body(0, 0, p.Body.STATIC)
+
+b1.position = (400, 350)
+b2.position = (400, 350)
+
+s1 = p.Poly(b1, ((0, 0), (100, 100), (100, 0)))
+s3 = p.Poly(b1, ((0, 0), (130, -100), (130, 0)))
+s4 = p.Poly(b1, ((0, 0), (random.randint(-150, -50), random.randint(-150, -50)),
+                         (random.randint(-150, -50), -200)))
+s2 = p.Poly(b2, ((0, 0), (900, 50), (900, 500)))
+
+
+
+space.add(b1, s1, s3, s4)
+#space.add(b2, s2)
+
+#s1.filter = s1_filter
+#s2.filter = s2_filter
+
+running = True
+
+surface = pygame.display.get_surface()
+
+clock = pygame.time.Clock()
+
+b2.angle -= 0.15
+
+
+while running:
+    for ev in pygame.event.get():
+        if ev == pgl.QUIT:
+            running = False
+        if ev.type == pgl.KEYDOWN and ev.key == pgl.K_q:
+            running = False
+        if ev.type == pgl.KEYDOWN and ev.key == pgl.K_ESCAPE:
+            running = False
+    surface.fill((0, 0, 0))
+
+    # stationary triangle2
+    for i, s in enumerate(b1.shapes):
+        points = [pgu.to_pygame(b1.local_to_world(x), surface) for x in s.get_vertices()]
+        pygame.draw.polygon(surface, (128, 0, i*64), points)
+
+    # moving triangle
+    b2.angle += step
+
+    points = [pgu.to_pygame(b2.local_to_world(x), surface) for x in s2.get_vertices()]
+    pygame.draw.polygon(surface, (64, 64, 0), points)
+
+    hits = space.shape_query(s2)
+    if hits:
+        points = [b2.local_to_world(x) for x in s2.get_vertices()]
+        info1 = space.segment_query_first(points[1], points[0], 0.1, shape_filter)
+        info2 = space.segment_query_first(points[2], points[0], 0.1, shape_filter)
+
+        for s in b1.shapes:
+            draw_points = [pgu.to_pygame(points[0], surface)]
+            for x in s.get_vertices():
+                x = b1.local_to_world(x)
+                for ss in b2.shapes:
+                    query = ss.point_query(x)
+                    if query.distance < -0.01:
+                        #print x, query
+                        draw_points.append(pgu.to_pygame(x, surface))
+            if info1 and info1.point.get_dist_sqrd(points[0]) > 5 and info1.shape is s:
+                p1 = pgu.to_pygame(info1.point, surface)
+                pygame.draw.circle(surface, (0, 255, 0), p1, 1)
+                draw_points.append(p1)
+            if info2 and info2.point.get_dist_sqrd(points[0]) > 5 and info2.shape is s:
+                p2 = pgu.to_pygame(info2.point, surface)
+                pygame.draw.circle(surface, (0, 0, 255), p2, 1)
+                draw_points.append(p2)
+            #print draw_points, info1, info2
+            if len(draw_points) >= 3:
+                pygame.draw.polygon(surface, (128, 128, 0), draw_points)
+
+
+    pygame.display.flip()
+
+    clock.tick(60)
-- 
2.34.1