From 2621b90ed2347ce0d1655db67c201aeec7674afe Mon Sep 17 00:00:00 2001
From: m <m@catbus>
Date: Tue, 1 Jan 2019 15:54:05 +0100
Subject: [PATCH] Initial commit

---
 README.md       |  3 +++
 fading_pixel.py | 42 ++++++++++++++++++++++++++++++++++++++++++
 sine.py         | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 README.md
 create mode 100755 fading_pixel.py
 create mode 100755 sine.py

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d655d39
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# Pixelthud
+
+Animationen für die Decken-LED-Matrix im Chaospott. Kompatibel zu Pixelserver2
diff --git a/fading_pixel.py b/fading_pixel.py
new file mode 100755
index 0000000..0c3421a
--- /dev/null
+++ b/fading_pixel.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import numpy as np
+import pygame
+
+Nx = int(sys.argv[1])
+Ny = int(sys.argv[2])
+try:
+    fps = float(sys.argv[3])
+except (IndexError, ValueError):
+    fps = 1.0
+
+
+def point2idx(x,y):
+    return 3*(x+Nx*y)
+
+def set_pixel_max(buffer, x, y):
+    idx = point2idx(x,y)
+    for i in range(3):
+        buffer[idx+i] = max(0x00, buffer[idx+i]-1)
+
+def set_pixel_rand(buffer, x, y):
+    idx = point2idx(x,y)
+    for i in range(3):
+        buffer[idx+i] = np.random.randint(0x00, 0xff)
+
+clock = pygame.time.Clock()
+buffer = bytearray(b"\x00"*(3*Nx*Ny))
+
+i = 0
+while True:
+    i = i + 1
+    for px in range(Nx):
+        for py in range(Ny):
+            set_pixel_max(buffer, px, py)
+    for j in range(10):
+        set_pixel_rand(buffer, np.random.randint(0, Nx), np.random.randint(0, Ny))
+        if i > 100:
+            os.write(1, buffer)
+            clock.tick_busy_loop(fps)
\ No newline at end of file
diff --git a/sine.py b/sine.py
new file mode 100755
index 0000000..f3bf5a4
--- /dev/null
+++ b/sine.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import numpy as np
+import pygame
+
+Nx = int(sys.argv[1])
+Ny = int(sys.argv[2])
+try:
+    frequency = float(sys.argv[3])
+except (IndexError, ValueError):
+    frequency = 5
+
+fps = 30
+amplitude = 105
+offset = 150
+t = 0
+
+x,y = np.meshgrid(np.linspace(0, 2*np.pi * min(1, Nx/Ny), Nx),  np.linspace(0, 2*np.pi * min(1, Ny/Nx), Ny))
+kx = x + y
+
+clock = pygame.time.Clock()
+
+while True:
+    t = t + 1e-3
+    R = amplitude * np.sin(kx - 2 * np.pi * frequency * t) + offset
+    G = amplitude * np.sin(kx - 2 * np.pi * frequency  * t + 2*np.pi/3) + offset
+    B = amplitude * np.sin(kx - 2 * np.pi * frequency  * t + 4*np.pi/3) + offset
+
+    out = np.dstack((R,G,B)).astype(np.uint8).tobytes()
+    os.write(1, out)
+    clock.tick_busy_loop(fps)
\ No newline at end of file