1 files changed, 104 insertions, 0 deletions
diff --git a/data/en/graphics/lines b/data/en/graphics/lines
new file mode 100644
index 0000000..16db9d6
--- /dev/null
+++ b/data/en/graphics/lines
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+# lines: make lots of lines on the screen
+# pep8-ignore: E501
+
+import pippy
+import pygame
+import sys
+from pygame.locals import *
+from random import *
+
+# always need to init first thing
+pygame.init()
+
+# turn off the cursor
+pygame.mouse.set_visible(False)
+
+# create the window and keep track of the surface
+# for drawing into
+screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN)
+
+# ask for screen's width and height
+size = width, height = screen.get_size()
+
+# start the screen all black
+screen.fill((0, 0, 0))
+
+# we need starting endpoints for the line and seed motion vectors
+start = [randint(0, size[0]), randint(0, size[1])]
+end = [randint(0, size[0]), randint(0, size[1])]
+
+# randomize the motion, 1..3 in each direction, positive or negative, but
+# never 0
+mvect_start = [choice((-1, 1)) * randint(1, 3), choice((-1, 1)) * randint(1, 3)]
+mvect_end = [choice((-1, 1)) * randint(1, 3), choice((-1, 1)) * randint(1, 3)]
+
+# start with a random color and color direction
+color = [randint(0, 255), randint(0, 255), randint(0, 255)]
+direction = [choice((-1, 1)), choice((-1, 1)), choice((-1, 1))]
+
+while pippy.pygame.next_frame():
+
+    for event in pygame.event.get():
+        if event.type == QUIT:
+            sys.exit()
+
+        elif event.type == KEYDOWN:
+            sys.exit()
+
+    # draw the line using the current values and width=3
+    pygame.draw.line(screen, color, start, end, 3)
+
+    # update the display
+    pygame.display.flip()
+
+    # update the end points and the color
+    for i in range(2):
+        start[i] = start[i] + mvect_start[i]
+        end[i] = end[i] + mvect_end[i]
+
+    for i in range(3):
+        color[i] = color[i] + direction[i]
+
+    # check if anything has gone out of range and
+    # if so, bring back to edge and reverse the
+    # corresponding motion vector
+    if start[0] < 0:
+        start[0] = 0
+        mvect_start[0] = (-1) * mvect_start[0]
+    elif start[0] >= size[0]:
+        start[0] = size[0] - 1
+        mvect_start[0] = (-1) * mvect_start[0]
+
+    if start[1] < 0:
+        start[1] = 0
+        mvect_start[1] = (-1) * mvect_start[1]
+    elif start[1] >= size[1]:
+        start[1] = size[1] - 1
+        mvect_start[1] = (-1) * mvect_start[1]
+
+    if end[0] < 0:
+        end[0] = 0
+        mvect_end[0] = (-1) * mvect_end[0]
+    elif end[0] >= size[0]:
+        end[0] = size[0] - 1
+        mvect_end[0] = (-1) * mvect_end[0]
+
+    if end[1] < 0:
+        end[1] = 0
+        mvect_end[1] = (-1) * mvect_end[1]
+    elif end[1] >= size[1]:
+        end[1] = size[1] - 1
+        mvect_end[1] = (-1) * mvect_end[1]
+
+    for i in range(3):
+        if color[i] < 0:
+            color[i] = 0
+            direction[i] = direction[i] * (-1)
+        elif color[i] >= 255:
+            color[i] = 255
+            direction[i] = direction[i] * (-1)
+
+    # randomly change the color directon on occasion
+    if randint(0, 511) == 128:
+        for i in range(3):
+            direction[i] = choice((-1, 1))