Update README; Fixed permissions

- racers now have a tail whose length depends on the racer’s speed
- speed is limited to ±2 LEDs/frame

COPYING

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019-2022 Thomas Kolb
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,7 @@
+# Skripte für ZAMusiclight
+
+Dieser Ordner enthält Python-Skripte für das ZAMusiclight.
+
+`rgbw_sinus.py` ist das erste Beispielskript und soll als Referenz dienen.
+
+Weitere Information gibt es im [ZAM-Wiki](https://wiki.betreiberverein.de/books/projekte-aktuell/chapter/zamusiclight).

fader.py

@@ -1,36 +0,0 @@
-#!/usr/bin/env python
-
-import sk6812
-import time
-import random
-
-s = sk6812.SK6812("zybot", 2703)
-s.set_fadestep(10)
-
-colorcycle = [
-        (255, 0, 0, 0),
-        (0, 255, 0, 0),
-        (0, 0, 255, 0),
-        (0, 0, 0, 255),
-        (255, 0, 0, 255),
-        (0, 255, 0, 255),
-        (0, 0, 255, 255),
-        (255, 255, 255, 255),
-        ]
-
-k = 0
-
-while True:
-  r = colorcycle[k][0]
-  g = colorcycle[k][1]
-  b = colorcycle[k][2]
-  w = colorcycle[k][3]
-
-  for i in range(300):
-    s.fade_color(i, r, g, b, w)
-    s.commit()
-    time.sleep(0.01)
-
-  k = (k + 1) % len(colorcycle)
-  time.sleep(1)
-

fireworks.py

@@ -1,56 +0,0 @@
-#!/usr/bin/env python3
-
-import sk6812
-import time
-from random import randint
-
-class Rocket:
-    def __init__(self, sk, color = [0,0,0,255], alt = 100, size = 10):
-        self.sk = sk
-        self.color = color
-        self.alt = alt
-        self.size = size
-
-        self.pos = 0
-        self.dist = 0
-
-    def draw(self):
-        if self.pos < self.alt:
-            # launching
-            self.sk.add_color(self.pos, 64, 32, 0, 0)
-            self.sk.add_color(self.pos+1, 64, 32, 0, 0)
-            self.pos += 2
-        elif self.dist < self.size:
-            # exploded
-            self.sk.set_color(self.alt, 0, 0, 0, 255)
-            self.sk.add_color(self.alt + self.dist, self.color[0], self.color[1], self.color[2], self.color[3])
-            self.sk.add_color(self.alt - self.dist, self.color[0], self.color[1], self.color[2], self.color[3])
-            self.dist += 1
-
-
-num_modules = 300
-
-interval = 0.05
-
-w = sk6812.SK6812("zybot", 2703)
-w.set_fadestep(1.00/interval)
-w.set_num_modules(num_modules)
-
-rockets = []
-frame = 0
-
-while True:
-  if frame % 30 == 0:
-    rockets.append(Rocket(w, [randint(0, 255), randint(0, 255), randint(0, 255), randint(0, 255)], randint(50, 249), randint(10, 50)))
-
-  for r in rockets:
-    r.draw()
-
-  for i in range(num_modules):
-    w.fade_color(i, 0, 0, 0, 0)
-
-  w.commit()
-
-  frame += 1
-
-  time.sleep(interval)

hsv2rgbw.py

@@ -1,43 +0,0 @@
-import numpy as np
-
-# h = 0..359
-# s = 0..255
-# v = 0..511 (values above 255 add white channel)
-def hsv2rgbw(h, s, v):
-
-    h %= 360
-
-    v_ = min(255, v)
-
-    # C = 0..255
-    C = (v_ * s) // 256
-
-    h_ = 128 * h // 60
-
-    # X = 0..255
-    X = C * (128 - abs(h_ % 256 - 128)) // 128
-
-    if h < 60:
-        r, g, b = C, X, 0
-    elif h < 120:
-        r, g, b = X, C, 0
-    elif h < 180:
-        r, g, b = 0, C, X
-    elif h < 240:
-        r, g, b = 0, X, C
-    elif h < 300:
-        r, g, b = X, 0, C
-    else:
-        r, g, b = C, 0, X
-
-    m = v_ - C
-    r += m
-    g += m
-    b += m
-
-    if v >= 256:
-        w = v - 255
-    else:
-        w = 0
-
-    return np.array([r, g, b, w])

hsv_fade.py

@@ -1,42 +0,0 @@
-#!/usr/bin/env python
-
-import sk6812_multistrip as sk6812
-import time
-import math
-import sys
-import random
-from hsv2rgbw import hsv2rgbw
-
-import numpy as np
-
-sk = sk6812.SK6812(sys.argv[1], 2703)
-sk.set_fadestep(10)
-
-interval = 1/30
-
-nled = 16
-nstrip = 8
-
-h = 0
-s = 192
-v = 255
-
-loop = 0
-
-while True:
-
-    v = (loop // 30) % 255
-
-    # update colors
-    for led in range(nled):
-        for strip in range(nstrip):
-            color = hsv2rgbw(h + 360 * strip//nstrip, s, v)
-            color = color * 50 // 100
-            sk.set_color(strip, led, color[0], color[1], color[2], color[3])
-
-
-    sk.commit()
-
-    loop += 1
-
-    time.sleep(interval)

knightrider.py

@@ -1,46 +0,0 @@
-#!/usr/bin/env python3
-
-import sk6812
-import time
-
-num_modules = 300
-
-interval = 0.05
-
-w = sk6812.SK6812("zybot", 2703)
-w.set_fadestep(0.05/interval)
-w.set_num_modules(num_modules)
-
-# dictionary which maps {module: [r, g, b]}
-set_colors = {}
-
-curModule = [0, 0, 0, 0]
-speed = [0.49, 0.65, 1, 0.81]
-#countUp = [True, True, False]
-while True:
-  set_colors = {}
-
-  set_colors[int(curModule[0])] = [0, 0, 0, 0]
-  set_colors[int(curModule[1])] = [0, 0, 0, 0]
-  set_colors[num_modules-1-int(curModule[2])] = [0, 0, 0, 0]
-  set_colors[num_modules-1-int(curModule[3])] = [0, 0, 0, 0]
-
-  set_colors[int(curModule[0])][0] = 255
-  set_colors[int(curModule[1])][1] = 255
-  set_colors[num_modules-1-int(curModule[2])][2] = 255
-  set_colors[num_modules-1-int(curModule[3])][3] = 255
-
-  for k in set_colors.keys():
-    w.add_color(k, set_colors[k][0], set_colors[k][1], set_colors[k][2], set_colors[k][3])
-
-  for i in range(num_modules):
-    w.fade_color(i, 0, 0, 0, 0)
-
-  w.commit()
-
-  for i in range(4):
-    curModule[i] += speed[i]
-    if curModule[i] >= num_modules:
-      curModule[i] -= num_modules
-
-  time.sleep(interval)

knightrider_multistrip.py

@@ -1,59 +0,0 @@
-#!/usr/bin/env python3
-
-import sk6812_multistrip as sk6812
-import time
-import sys
-
-num_modules = 16
-
-interval = 1/60
-
-w = sk6812.SK6812(sys.argv[1], 2703)
-w.set_fadestep(0.20/interval)
-#w.set_num_modules(num_modules)
-
-# dictionary which maps {module: [r, g, b]}
-set_colors = {}
-
-curModule = [0, 0, 0, 0]
-#speed = [0.49, 0.65, 1, 0.81]
-speed = [0.13, 0.17, 0.19, 0.21]
-#countUp = [True, True, False]
-
-brightness = 32
-
-strip = 0
-while True:
-  w.set_fadestep(0.10/interval)
-
-  set_colors = {}
-
-  set_colors[int(curModule[0])] = [0, 0, 0, 0]
-  set_colors[int(curModule[1])] = [0, 0, 0, 0]
-  #set_colors[num_modules-1-int(curModule[1])] = [0, 0, 0, 0]
-  set_colors[int(curModule[2])] = [0, 0, 0, 0]
-  set_colors[int(curModule[3])] = [0, 0, 0, 0]
-  #set_colors[num_modules-1-int(curModule[3])] = [0, 0, 0, 0]
-
-  set_colors[int(curModule[0])][0] = brightness
-  set_colors[int(curModule[1])][1] = brightness
-  #set_colors[num_modules-1-int(curModule[1])][1] = brightness
-  set_colors[int(curModule[2])][2] = brightness
-  set_colors[int(curModule[3])][3] = brightness
-  #set_colors[num_modules-1-int(curModule[3])][3] = brightness
-
-  for strip in range(8):
-    for k in set_colors.keys():
-      w.add_color(strip, k, set_colors[k][0], set_colors[k][1], set_colors[k][2], set_colors[k][3])
-
-    for i in range(num_modules):
-      w.fade_color(strip, i, 0, 0, 0, 0)
-
-  w.commit()
-
-  for i in range(4):
-    curModule[i] += speed[i]
-    if curModule[i] >= num_modules:
-      curModule[i] -= num_modules
-
-  time.sleep(interval)

random_fader.py

@@ -1,24 +0,0 @@
-#!/usr/bin/env python
-
-import sk6812
-import time
-import random
-
-s = sk6812.SK6812("zybot", 2703)
-s.set_fadestep(2)
-
-# dictionary which maps {module: [r, g, b]}
-set_colors = {}
-
-while True:
-  r = random.randint(0, 254)
-  g = random.randint(0, 254)
-  b = random.randint(0, 254)
-  w = random.randint(0, 254)
-
-  for i in range(300):
-    s.fade_color(i, r, g, b, w)
-    s.commit()
-    time.sleep(0.01)
-
-  #time.sleep(120)

rgbw_flame.py

@@ -1,118 +0,0 @@
-#!/usr/bin/env python
-
-import sk6812_multistrip as sk6812
-import time
-import math
-import sys
-import random
-
-import numpy as np
-
-s = sk6812.SK6812(sys.argv[1], 2703)
-s.set_fadestep(10)
-
-phase = 0
-nled = 16
-nstrip = 8
-
-interval = 1.0/30
-
-scale = 0.15
-
-strip = 0
-
-tiltphase = 0
-
-ENERGY_MULT = 92
-ENERGY_DIV = 100
-
-MAXENERGY_ADD = 160
-ENERGY_SUB = 7
-ENERGY_PULL_MAX_PCT = 100
-
-energy = np.zeros( (nled+1, nstrip), dtype=int )
-energy_smooth = np.zeros( energy.shape, dtype=int )
-
-COLORMAP_X = [           0,             70,             120,              200,               225,               255]
-COLORMAP_Y = [(0, 0, 0, 0), (128, 0, 0, 0), (192, 64, 0, 0), (255, 128, 0, 0), (255, 128, 0, 20), (255, 128, 0, 40)]
-
-def colormap(x):
-    i = 0
-    while i < len(COLORMAP_X)-1 and COLORMAP_X[i+1] < x:
-        i += 1
-
-    if i >= len(COLORMAP_X)-1:
-        return np.array(COLORMAP_Y[len(COLORMAP_Y)-1])
-
-    start_x = COLORMAP_X[i]
-    end_x = COLORMAP_X[i+1]
-
-    start_col = np.array(COLORMAP_Y[i], dtype=int)
-    end_col = np.array(COLORMAP_Y[i+1], dtype=int)
-
-    col = (x - start_x) * 100 // (end_x - start_x) * (end_col - start_col) // 100 + start_col
-    return col
-
-
-loop = 0
-intensity = MAXENERGY_ADD
-
-while True:
-
-    if loop % 5 == 0:
-        intensity = random.randint(MAXENERGY_ADD*3//4, MAXENERGY_ADD*5//4)
-
-    # inject random energy in bottom row
-    for i in range(nstrip):
-        energy[0, i] += random.randint(0, intensity)
-
-    # pull energy from the cell below
-    for led in range(nled, 0, -1):
-        for strip in range(nstrip):
-            wanted_energy = random.randint(0, ENERGY_PULL_MAX_PCT) * energy[led-1, strip] // 100
-            pulled_energy = min(wanted_energy, energy[led-1, strip])
-            energy[led, strip] += pulled_energy
-            energy[led-1, strip] -= pulled_energy
-
-    # decrease global amount of energy
-    for led in range(nled+1):
-        for strip in range(nstrip):
-            #energy[led, strip] *= ENERGY_MULT
-            #energy[led, strip] //= ENERGY_DIV
-            energy[led, strip] -= min(ENERGY_SUB, energy[led, strip])
-
-    # smooth the energy distribution
-    for led in range(nled):
-        for strip in range(nstrip):
-            strip_left = (strip + nstrip - 1) % nstrip
-            strip_right = (strip + nstrip + 1) % nstrip
-            led_above = led + 1
-            led_below = led - 1
-
-            energy_smooth[led, strip] = 100 * energy[led, strip]
-            energy_smooth[led, strip] += 30 * energy[led, strip_left]
-            energy_smooth[led, strip] += 30 * energy[led, strip_right]
-
-            gain = 160
-
-            if led_above < nled:
-                energy_smooth[led, strip] += 10 * energy[led_above, strip]
-                gain += 10
-            if led_below >= 0:
-                energy_smooth[led, strip] += 10 * energy[led_below, strip]
-                gain += 10
-
-            energy_smooth[led, strip] //= gain
-
-    # update colors
-    for led in range(nled):
-        for strip in range(nstrip):
-            color = colormap(energy_smooth[led, strip])**2//255
-            s.fade_color(strip, led, color[0], color[1], color[2], color[3])
-
-
-    s.commit()
-
-    loop += 1
-
-    time.sleep(interval)

rgbw_hsv_flame.py

@@ -1,131 +0,0 @@
-#!/usr/bin/env python
-
-import sk6812_multistrip as sk6812
-import time
-import math
-import sys
-import random
-from hsv2rgbw import hsv2rgbw
-
-import numpy as np
-
-s = sk6812.SK6812(sys.argv[1], 2703)
-
-phase = 0
-nled = 16
-nstrip = 8
-
-interval = 1.0/30
-
-scale = 0.15
-
-strip = 0
-
-tiltphase = 0
-
-ENERGY_MULT = 92
-ENERGY_DIV = 100
-
-MAXENERGY_ADD = 160
-ENERGY_SUB = 7
-ENERGY_PULL_MAX_PCT = 100
-
-HIGHLIGHT_OFFSET = -60
-
-energy = np.zeros( (nled+1, nstrip), dtype=int )
-energy_smooth = np.zeros( energy.shape, dtype=int )
-
-COLORMAP_X = [ 0, 70, 120, 200, 225, 255]
-COLORMAP_Y = [
-        (0, 255,   0),
-        (0, 255, 128),
-        (0, 255, 192),
-        (0, 192, 192),
-        (0, 128, 255),
-        (0, 128, 300)]
-
-
-def colormap(x, h):
-    i = 0
-    while i < len(COLORMAP_X)-1 and COLORMAP_X[i+1] < x:
-        i += 1
-
-    if i >= len(COLORMAP_X)-1:
-        return hsv2rgbw(*COLORMAP_Y[len(COLORMAP_Y)-1])
-
-    start_x = COLORMAP_X[i]
-    end_x = COLORMAP_X[i+1]
-
-    start_col = np.array(COLORMAP_Y[i], dtype=int)
-    end_col = np.array(COLORMAP_Y[i+1], dtype=int)
-
-    col = (x - start_x) * 100 // (end_x - start_x) * (end_col - start_col) // 100 + start_col
-
-    col[0] = (col[0] + h + 360) % 360
-
-    return hsv2rgbw(*col)
-
-
-loop = 0
-intensity = MAXENERGY_ADD
-
-while True:
-    s.set_fadestep(10)
-
-    if loop % 5 == 0:
-        intensity = random.randint(MAXENERGY_ADD*3//4, MAXENERGY_ADD*5//4)
-
-    # inject random energy in bottom row
-    for i in range(nstrip):
-        energy[0, i] += random.randint(0, intensity)
-
-    # pull energy from the cell below
-    for led in range(nled, 0, -1):
-        for strip in range(nstrip):
-            wanted_energy = random.randint(0, ENERGY_PULL_MAX_PCT) * energy[led-1, strip] // 100
-            pulled_energy = min(wanted_energy, energy[led-1, strip])
-            energy[led, strip] += pulled_energy
-            energy[led-1, strip] -= pulled_energy
-
-    # decrease global amount of energy
-    for led in range(nled+1):
-        for strip in range(nstrip):
-            #energy[led, strip] *= ENERGY_MULT
-            #energy[led, strip] //= ENERGY_DIV
-            energy[led, strip] -= min(ENERGY_SUB, energy[led, strip])
-
-    # smooth the energy distribution
-    for led in range(nled):
-        for strip in range(nstrip):
-            strip_left = (strip + nstrip - 1) % nstrip
-            strip_right = (strip + nstrip + 1) % nstrip
-            led_above = led + 1
-            led_below = led - 1
-
-            energy_smooth[led, strip] = 100 * energy[led, strip]
-            energy_smooth[led, strip] += 30 * energy[led, strip_left]
-            energy_smooth[led, strip] += 30 * energy[led, strip_right]
-
-            gain = 160
-
-            if led_above < nled:
-                energy_smooth[led, strip] += 10 * energy[led_above, strip]
-                gain += 10
-            if led_below >= 0:
-                energy_smooth[led, strip] += 10 * energy[led_below, strip]
-                gain += 10
-
-            energy_smooth[led, strip] //= gain
-
-    # update colors
-    for led in range(nled):
-        for strip in range(nstrip):
-            color = colormap(energy_smooth[led, strip], (loop // 20) % 360)**2//255
-            s.fade_color(strip, led, color[0], color[1], color[2], color[3])
-
-
-    s.commit()
-
-    loop += 1
-
-    time.sleep(interval)

rgbw_prime_sinus.py

@@ -1,55 +0,0 @@
-#!/usr/bin/env python3
-
-import sk6812_multistrip as sk6812
-import time
-import math
-import sys
-
-s = sk6812.SK6812(sys.argv[1], 2703)
-
-phase = 0
-nled = 16
-nstrip = 8
-
-interval = 1.0/60
-
-scale = 0.15
-
-strip = 0
-
-tiltphase = 0
-
-seq = 0
-rxseq = 0
-lasttxtime = 0
-
-while True:
-
-  rxseq = s.try_read_seq()
-  if rxseq != -1:
-    print(f"TX: {seq}, RX: {rxseq}")
-
-  now = time.time()
-
-  if rxseq >= seq - 3 or (lasttxtime < now - 0.5):
-    lasttxtime = now
-
-    for i in range(nled):
-      for strip in range(nstrip):
-          x = 2*math.pi * i / nled
-          y = 2*math.pi * strip * 2*math.sin(tiltphase) / nstrip
-          r = scale * (127 + 127 * math.sin(y + x + 283*phase + 0 * math.pi/2))
-          g = scale * (127 + 127 * math.sin(y + x + 293*phase + 1 * math.pi/2))
-          b = scale * (127 + 127 * math.sin(y + x + 307*phase + 2 * math.pi/2))
-          w = scale * 0.6 * (127 + 127 * math.sin(y + x +  311*phase + 3 * math.pi/2))
-
-          s.set_color((strip+0)%nstrip, i, r, g, b, w)
-
-    s.ack_request(seq)
-    seq += 1
-    s.commit()
-
-  phase += 2*math.pi * interval / (739*1)
-  tiltphase += 2*math.pi * interval / (471/2)
-  time.sleep(interval)
-

rgbw_racers.py

@@ -0,0 +1,154 @@
+#!/usr/bin/env python
+# encoding: utf-8
+
+# Copyright (c) 2022 Julian Hammer
+# This file is licensed under the terms of the MIT license. See COPYING for
+# details.
+
+# Importieren von sk6812_multistrip.py, welches das Netzwerkprotokoll für die
+# LED-Leiste abstrahiert.
+import sk6812_multistrip as sk6812
+
+import time    # für sleep()
+import sys     # zum Lesen der IP-Adresse aus den Kommandozeilenargumenten
+
+import math
+import random
+import colorsys
+
+# Konstanten
+NLED   = 150     # Anzahl der LEDs pro logischen Strip
+NSTRIP = 2       # Anzahl der logischen Strips
+
+# Objekt initialisieren
+s = sk6812.SK6812(sys.argv[1], 2703)
+
+# Wartezeit zwischen den Animationsschritten. Achtung, die LED-Leiste arbeitet
+# immer mit 60 FPS! Dies ist insbesondere bei Verwendung von fade_color()
+# relevant.
+interval = 1.0/60
+
+last_frame = [(0,0,0,0)] * NLED * NSTRIP
+
+def hsv2rgb(h,s,v):
+    return tuple(round(i * 255) for i in colorsys.hsv_to_rgb(h,s,v))
+
+def random_color():
+    return list(hsv2rgb(random.random(), 1, 1)) + [random.randint(0,255)]
+
+def loc2sl(loc):
+    # translates 1d-coordinate (loc) to
+    # (strip, led) with:
+    # (0,0) ... (0, 149) (1, 149) ... (1, 0)
+    strip = loc // NLED
+    led = loc % NLED
+    if strip == 1:
+        led = NLED - led
+    return strip, led
+
+MAXLOC = NLED*NSTRIP
+
+racers = [
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.3),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.3),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.3),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.3),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.3),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.3),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.3),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.3),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.5),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.5),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.5),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*0.5),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*2),
+    dict(loc=random.randint(0,299), color=random_color(), speed=(random.random()-0.5)*2),
+]
+
+# Clear all leds at start
+for loc in range(MAXLOC):
+    strip, led = loc2sl(loc)
+    s.set_color(strip, led, 0,0,0,0)
+    if loc % 150 == 0:
+        s.commit()
+s.commit()
+
+
+print("{:>10} {:>8} {:>8}".format("frame", "AVG", "MAX"))
+# Hauptschleife
+f = 0  # frame counter
+clear_leds = []
+while True:
+    for strip, led in clear_leds:
+        # Clear leds
+        s.set_color(strip, led, 0,0,0,0)
+    clear_leds = []
+        
+    for r in racers:
+        # Update location
+        r['loc'] += r['speed']
+        # Reverse at ends (0 and MAXLOC-1)
+        if r['loc'] >= MAXLOC:
+            r['loc'] = MAXLOC - (r['loc'] % MAXLOC)
+            r['speed'] *= -1
+        if r['loc'] < 0:
+            r['loc'] *= -1
+            r['speed'] *= -1
+
+        # Interpolate color linearly between two leds
+        strip, led = loc2sl(int(r['loc']))
+        s.add_color(strip, led, *tuple([int(c*(math.ceil(r['loc'])-r['loc'])) for c in r['color']]))
+        clear_leds.append((strip, led))
+        strip, led = loc2sl(math.ceil(r['loc']))
+        s.add_color(strip, led, *tuple([int(c*(r['loc']-int(r['loc']))) for c in r['color']]))
+        clear_leds.append((strip, led))
+
+        # Add tail of speed-depending length and logarithmicly decaying brightness
+        tail = r['speed'] * 10
+        if tail > 0:
+            tail_range = range(1, int(tail))
+        else:
+            tail_range = range(-1, int(tail), -1)
+        for i in tail_range:
+            if not 0 <= int(r['loc'])-i < MAXLOC:
+                continue
+            strip, led = loc2sl(int(r['loc'])-i)
+            color = tuple([int(c / (abs(i)*(abs(tail)/2)) ) for c in r['color'][:3]]+[0])  # blackout white
+            s.add_color(strip, led, *color)
+            clear_leds.append((strip, led))
+        # last tail segment is interpolated
+        if tail_range:
+            if not 0 <= int(r['loc'])-i < MAXLOC:
+                continue
+            last_loc = r['loc']-i
+            strip, led = loc2sl(math.ceil(last_loc))
+            s.add_color(strip, led, *tuple([int(c*(last_loc-int(last_loc))) for c in color]))
+            clear_leds.append((strip, led))
+
+        # Random speed variation, limited to [-2, 2] interval
+        r['speed'] = max(-2, min(2, r['speed'] + (random.random()-0.5)*0.01))
+
+        # Use speed to define W-intensity ("whiteness")
+        r['color'][3] = min(int(abs(r['speed'])*128), 255)
+
+    if f % 600 == 0:
+        print("{:>10} {:>8.2f} {:>8.2f}".format(
+            f,
+            sum([abs(r['speed']) for r in racers])/len(racers),
+            max([abs(r['speed']) for r in racers])))
+
+    s.commit()
+
+    # Warte bis zum nächsten Frame
+    time.sleep(interval)
+    f += 1

rgbw_sinus.py

@@ -1,35 +1,66 @@
 #!/usr/bin/env python
+# encoding: utf-8
 
+# Copyright (c) 2019-2022 Thomas Kolb
+# This file is licensed under the terms of the MIT license. See COPYING for
+# details.
+
+# Importieren von sk6812_multistrip.py, welches das Netzwerkprotokoll für die
+# LED-Leiste abstrahiert.
 import sk6812_multistrip as sk6812
-import time
-import math
-import sys
 
+import time    # für sleep()
+import sys     # zum Lesen der IP-Adresse aus den Kommandozeilenargumenten
+
+import math
+
+# Konstanten
+NLED   = 150     # Anzahl der LEDs pro logischen Strip
+NSTRIP = 2       # Anzahl der logischen Strips
+
+# Objekt initialisieren
 s = sk6812.SK6812(sys.argv[1], 2703)
 
-phase = 0
+# Wartezeit zwischen den Animationsschritten. Achtung, die LED-Leiste arbeitet
-nled = 16
+# immer mit 60 FPS! Dies ist insbesondere bei Verwendung von fade_color()
-nstrip = 8
+# relevant.
-
 interval = 1.0/60
 
-scale = 0.1
+# Globale Skalierung für die Helligkeit.
+scale = 0.5
 
-strip = 0
+# Startzeitpunkt der Animation
+t0 = time.time()
 
+# Hauptschleife
 while True:
-  for i in range(nled):
+    # hole die aktuelle Zeit seit dem Start
-    x = 2*math.pi * i / nled
+    t = time.time() - t0
-    r = scale * (127 + 127 * math.sin(x + 8*phase + 0 * math.pi/2))
-    g = scale * (127 + 127 * math.sin(x + 4*phase + 1 * math.pi/2))
-    b = scale * (127 + 127 * math.sin(x + 2*phase + 2 * math.pi/2))
-    w = scale * (127 + 127 * math.sin(x + 1*phase + 3 * math.pi/2))
 
-    for strip in range(nstrip):
+    # umskalieren in einen langsam fortschreitenden Phasenwert
-        s.set_color(strip, i, r, g, b, w)
+    phase = t * 2*math.pi / 739.0
 
-  s.commit()
+    # Laufe über alle LEDs in allen Strips ...
+    for strip in range(NSTRIP):
+        for i in range(NLED):
+            # ... berechne für jede LED eine individuelle Farbe ...
 
-  phase += 2*math.pi * interval / 10
+            # Der Wertebereich ist 0 bis 255 für jeden Kanal. Es gibt vier
-  time.sleep(interval)
+            # Kanäle: rot, grün, blau und weiß. Da weiß um einiges intensiver
+            # als die anderen Kanäle ist, wird dieser hier pauschal auf 60%
+            # gedimmt.
+            x = 2*math.pi * i / NLED
+            r = scale * (127 + 127 * math.sin(x + 283*phase + 0 * math.pi/2))
+            g = scale * (127 + 127 * math.sin(x + 293*phase + 1 * math.pi/2))
+            b = scale * (127 + 127 * math.sin(x + 307*phase + 2 * math.pi/2))
+            w = scale * 0.6 * (127 + 127 * math.sin(x +  311*phase + 3 * math.pi/2))
+
+            # ... und setze diese direkt
+            s.set_color(strip, i, r, g, b, w)
+
+        s.commit() # sendet alle bisherigen Befehle an die LED-Leiste. Muss
+                   # spätestens nach 210 Befehlen aufgerufen werden!
+
+    # Warte bis zum nächsten Frame
+    time.sleep(interval)
 

rundumleuchte.py

@@ -1,34 +0,0 @@
-#!/usr/bin/env python3
-
-import sk6812_multistrip as sk6812
-import time
-import math
-import sys
-
-num_modules = 16
-num_strips = 8
-
-interval = 1/20
-
-w = sk6812.SK6812(sys.argv[1], 2703)
-
-color = [0x20, 0x40, 0x00, 0x10]
-
-cur_strip = 0
-
-while True:
-  w.set_fadestep(int(0.80/interval))
-  for k in range(num_modules):
-    f = 1#math.sin(math.pi * k / num_modules)
-    w.add_color(cur_strip, k, f*color[0], f*color[1], f*color[2], f*color[3])
-
-  for strip in range(8):
-    for i in range(num_modules):
-      w.fade_color(strip, i, 0, 0, 0, 0)
-
-  w.commit()
-
-  cur_strip += 1
-  cur_strip %= num_strips
-
-  time.sleep(interval)

sk6812.py

@@ -1,79 +0,0 @@
-#!/usr/bin/env python3
-
-import struct
-import socket
-import time
-
-from random import random
-
-class SK6812Command:
-  # command definitions
-  SET_COLOR    = 0
-  FADE_COLOR   = 1
-  ADD_COLOR    = 2
-  SET_FADESTEP = 3
-  SET_NUM_MODS = 4
-
-  def __init__(self, action = SET_COLOR, module = 0, d0 = 0, d1 = 0, d2 = 0, d3 = 0):
-    self.action = int(action)
-    self.strip  = 0 # FIXME
-    self.module = int(module)
-    self.d0 = int(d0)
-    self.d1 = int(d1)
-    self.d2 = int(d2)
-    self.d3 = int(d3)
-
-  def serialize(self):
-    return struct.pack(">BBHBBBB", self.action, self.strip, self.module, self.d0, self.d1, self.d2, self.d3)
-
-class SK6812:
-  def __init__(self, host, port):
-    self.__commands = []
-
-    # create the UDP socket
-    family, socktype, proto, canonname, sockaddr = socket.getaddrinfo(host, port, 0, socket.SOCK_DGRAM)[0]
-
-    self.__socket = socket.socket(family, socktype, proto)
-    self.__socket.connect(sockaddr)
-
-  def commit(self):
-    # send the data
-    packet = b''
-    for command in self.__commands:
-      packet = packet + command.serialize()
-
-    if packet:
-      self.__socket.send(packet)
-
-    self.__commands = []
-
-  def set_fadestep(self, fadestep):
-    # add a "set fadestep" command
-    self.__commands.append(SK6812Command(SK6812Command.SET_FADESTEP, d0 = fadestep))
-
-  def set_color(self, module, r, g, b, w):
-    # add a "set color" command
-    self.__commands.append(SK6812Command(SK6812Command.SET_COLOR, module, r, g, b, w))
-
-  def fade_color(self, module, r, g, b, w):
-    # add a "fade to color" command
-    self.__commands.append(SK6812Command(SK6812Command.FADE_COLOR, module, r, g, b, w))
-
-  def add_color(self, module, r, g, b, w):
-    # add a "add to color" command
-    self.__commands.append(SK6812Command(SK6812Command.ADD_COLOR, module, r, g, b, w))
-
-  def set_num_modules(self, modules):
-    # add a "set number of modules" command
-    self.__commands.append(SK6812Command(SK6812Command.SET_NUM_MODS, d0 = (modules >> 24) & 0xFF, d1 = (modules >> 16) & 0xFF, d2 = (modules >> 8) & 0xFF, d3 = modules & 0xFF))
-
-if __name__ == "__main__":
-  w = SK6812("192.168.2.222", 2703)
-  w.set_fadestep(1);
-
-  while True:
-    w.set_color(10, 255, 255, 255, 255)
-    for i in range(20):
-      w.fade_color(i, 0, 0, 0)
-    w.commit()
-    time.sleep(0.2)

sk6812_multistrip.py

@@ -1,5 +1,9 @@
 #!/usr/bin/env python3
 
+# Copyright (c) 2019-2022 Thomas Kolb
+# This file is licensed under the terms of the MIT license. See COPYING for
+# details.
+
 import struct
 import socket
 import time

snowflakes.py

@@ -1,161 +0,0 @@
-#!/usr/bin/env python
-
-import sk6812_multistrip as sk6812
-import time
-import math
-import sys
-import random
-
-s = sk6812.SK6812(sys.argv[1], 2703)
-
-phase = 0
-nled = 16
-nstrip = 8
-
-interval = 1.0/60
-
-#scale = 0.15
-scale = 0.5
-
-strip = 0
-
-tiltphase = 0
-
-#phase_speeds = [13, 23, 42, 5]
-#phase_speeds = [37, 41, 43, 47]
-phase_speeds = [701, 709, 719, 727]
-
-class Framebuffer:
-	def __init__(self):
-		self.clear()
-
-	def clear(self):
-		self.r = [0] * (nstrip * nled)
-		self.g = [0] * (nstrip * nled)
-		self.b = [0] * (nstrip * nled)
-		self.w = [0] * (nstrip * nled)
-
-	def setpixel(self, strip, led, r, g, b, w):
-		idx = strip * nled + led
-		self.r[idx] = r
-		self.g[idx] = g
-		self.b[idx] = b
-		self.w[idx] = w
-
-	def addtopixel(self, strip, led, r, g, b, w):
-		idx = strip * nled + led
-		self.r[idx] += r
-		self.g[idx] += g
-		self.b[idx] += b
-		self.w[idx] += w
-
-	def render(self):
-		for strip in range(nstrip):
-			for led in range(nled):
-				idx = strip * nled + led
-				s.set_color(strip, led,
-						self.r[idx],
-						self.g[idx],
-						self.b[idx],
-						self.w[idx])
-
-class Snowflake:
-	def __init__(self):
-		self.phase = random.random() * 2 * math.pi
-		self.frequency = 2*math.pi * 1
-		self.speed = random.random() * 0.1 + 0.05
-
-		self.radius = 1.1
-		self.radiussq = self.radius**2
-
-		self.pos_strip = self.base_pos_strip = random.randint(0, nstrip-1)
-		self.pos_led = nled-1+self.radius
-
-	def move(self):
-		self.phase += self.frequency * interval
-		self.pos_strip = self.base_pos_strip + 1 * math.sin(self.phase)
-
-		self.pos_led -= 0.1
-
-	def render(self, framebuffer):
-		for strip in range(int(math.floor(self.pos_strip-self.radius)), int(math.ceil(self.pos_strip+self.radius))):
-			for led in range(int(math.floor(self.pos_led-self.radius)), int(math.ceil(self.pos_led+self.radius))):
-				if led < 0 or led >= nled:
-					continue
-
-				distsq = (strip - self.pos_strip)**2 + (led - self.pos_led)**2
-
-				brightness = 1 - distsq / self.radiussq
-				if brightness < 0:
-					continue # brightness 0 -> no effect -> save some calculations
-
-				norm_strip = strip
-				while norm_strip < 0:
-					norm_strip += nstrip
-				while norm_strip >= nstrip:
-					norm_strip -= nstrip
-
-				framebuffer.addtopixel(norm_strip, led, 0, 0, int(32*brightness), int(48*brightness))
-
-	def has_fallen(self):
-		return self.pos_led < -self.radius
-
-snowflakes = []
-framebuffer = Framebuffer()
-
-frame = 0
-
-snowlevel = [0] * nstrip
-
-while True:
-	# garbage collection
-	if True: #frame % 10 == 0:
-		visible_snowflakes = []
-		for flake in snowflakes:
-			if not flake.has_fallen():
-				visible_snowflakes.append(flake)
-			else:
-				idx = int(flake.base_pos_strip)
-				if idx < 0:
-					idx += nstrip
-				elif idx >= nstrip:
-					idx -= nstrip
-
-				snowlevel[idx] += 0.2
-
-		snowflakes = visible_snowflakes
-
-	# spawn new flakes
-	if random.random() < 0.1:
-		snowflakes.append(Snowflake())
-	
-	framebuffer.clear()
-
-	# move and render the flakes
-	for flake in snowflakes:
-		flake.move()
-		flake.render(framebuffer)
-
-	# add snow on the ground
-	for strip in range(nstrip):
-		led = 0
-		level = snowlevel[strip]
-		while level > 0:
-			if level >= 1:
-				brightness = 1
-			else:
-				brightness = level
-
-			framebuffer.addtopixel(strip, led, 0, int(8*brightness), int(32*brightness), int(12*brightness))
-
-			level -= 1
-			led += 1
-
-		snowlevel[strip] *= 0.999
-
-	framebuffer.render()
-
-	s.commit()
-
-	time.sleep(interval)
-	frame += 1

startup_anim_test.py

@@ -1,37 +0,0 @@
-#!/usr/bin/env python3
-
-import sk6812_multistrip as sk6812
-import math
-import sys
-import time
-
-s = sk6812.SK6812(sys.argv[1], 2703)
-
-nled = 16
-nstrip = 8
-
-interval = 1/30
-
-for led in range(nled):
-    for strip in range(nstrip):
-        s.fade_color(strip, led, 0, 0, 0, 0)
-
-s.commit()
-
-loop = 0
-while True:
-    intensity = int(64 * math.sin(2*math.pi * (loop * interval) * 0.25)**2)
-
-    r = 0
-    g = 0
-    b = intensity
-    w = 0
-
-    for strip in range(nstrip):
-        s.set_color(strip, 0, r, g, b, w)
-
-    s.commit()
-
-    time.sleep(interval)
-
-    loop += 1

startup_finished.py

@@ -1,46 +0,0 @@
-#!/usr/bin/env python3
-
-import sk6812_multistrip as sk6812
-import math
-import sys
-import time
-import random
-
-s = sk6812.SK6812(sys.argv[1], 2703)
-s.set_fadestep(1)
-s.commit()
-time.sleep(3)
-
-s.set_fadestep(1)
-
-nled = 16
-nstrip = 8
-
-interval = 1/20
-
-for led in range(nled):
-    for strip in range(nstrip):
-        s.fade_color(strip, led, 0, 0, 0, 0)
-
-s.commit()
-
-loop = 0
-while loop < nled:
-    led = loop
-
-    for strip in range(nstrip):
-        intensity = 48 + random.randint(0, 32)
-
-        g = 0
-        r = intensity * loop // nled
-        b = 1*(intensity - intensity * loop // nled) / 2
-        w = 0
-
-        s.set_color(strip, led, r, g, b, w)
-        s.fade_color(strip, led, 0, 0, 0, 0)
-
-    s.commit()
-
-    time.sleep(interval)
-
-    loop += 1