Added „Christmas Glitter“ animation

include/Animation/AllAnimations.h

@@ -10,3 +10,4 @@
 #include "RgbwSinusAnimation.h"
 #include "SnowfallAnimation.h"
 #include "StellarAnimation.h"
+#include "ChristmasGlitterAnimation.h"

include/Animation/AnimationController.h

@@ -20,6 +20,7 @@ class AnimationController
             FIREWORK = 5,
             STELLAR = 6,
             RGBW_SINUS = 7,
+            CHRISTMAS_GLITTER = 8,
 
             NUM_DEFAULT_ANIMATIONS
         };
@@ -38,7 +39,8 @@ class AnimationController
             "Matrix Code",
             "Fireworks",
             "Twinkling Sky",
-            "RGBW Sinus"
+            "RGBW Sinus",
+            "Christmas Glitter"
         };
 
         AnimationController(Fader *fader);

include/Animation/ChristmasGlitterAnimation.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <random>
+#include <list>
+
+#include "Animation.h"
+
+class ChristmasGlitterAnimation : public Animation
+{
+    public:
+        ChristmasGlitterAnimation(Fader *fader,
+                         const Fader::Color &background_color = Fader::Color{0x06, 0x04, 0x00, 0x04},
+                         const Fader::Color &glitter_color = Fader::Color{0x60, 0x40, 0x00, 0x60},
+                         int fadestep = 1, int background_spawns_per_frame = 20, int spawn_interval_frames = 4);
+
+        void loop(uint64_t frame) override;
+
+        void stop(void) override
+        {
+            m_stopping = true;
+        }
+
+        void reset(void) override;
+
+    private:
+        std::default_random_engine m_gen;
+
+        Fader::Color m_backgroundColor;
+        Fader::Color m_glitterColor;
+
+        int m_fadestep;
+        int m_spawnInterval; // in frames
+        int m_backgroundSpawnsPerFrame;
+
+        bool m_stopping;
+};

src/Animation/AnimationController.cpp

@@ -78,6 +78,10 @@ void AnimationController::changeAnimation(AnimationController::DefaultAnimation
             anim.reset(new RgbwSinusAnimation(m_fader));
             break;
 
+        case CHRISTMAS_GLITTER:
+            anim.reset(new ChristmasGlitterAnimation(m_fader));
+            break;
+
         default:
             return; // unknown id, do nothing
     }

src/Animation/ChristmasGlitterAnimation.cpp

@@ -0,0 +1,58 @@
+#include "Animation/ChristmasGlitterAnimation.h"
+
+#include <iostream>
+
+ChristmasGlitterAnimation::ChristmasGlitterAnimation(Fader *fader,
+                                   const Fader::Color &background_color, const Fader::Color &glitter_color,
+                                   int fadestep, int background_spawns_per_frame, int spawn_interval_frames)
+    : Animation(fader),
+      m_backgroundColor(background_color),
+      m_glitterColor(glitter_color),
+      m_fadestep(fadestep),
+      m_spawnInterval(spawn_interval_frames),
+      m_backgroundSpawnsPerFrame(background_spawns_per_frame)
+{
+    reset();
+}
+
+void ChristmasGlitterAnimation::loop(uint64_t frame)
+{
+    int nled = m_fader->modules_per_strip();
+    int nstrip = m_fader->strips();
+
+    if(frame == 0) {
+        m_fader->set_fadestep(m_fadestep);
+        m_fader->fade_color(m_backgroundColor);
+    }
+
+    // create new pixels
+    std::uniform_int_distribution<int> stripRng(0, nstrip-1);
+    std::uniform_int_distribution<int> ledRng(0, nled-1);
+
+    if(!m_stopping) {
+        if((frame % m_spawnInterval) == 0) {
+            int strip = stripRng(m_gen);
+            int led = ledRng(m_gen);
+
+            m_fader->add_color(strip, led, m_glitterColor);
+            m_fader->fade_color(strip, led, Fader::Color{0x10,0x06,0,0x03});
+        }
+
+        for(size_t i = 0; i < m_backgroundSpawnsPerFrame; i++) {
+            int strip = stripRng(m_gen);
+            int led = ledRng(m_gen);
+
+            m_fader->add_color(strip, led, m_backgroundColor);
+            m_fader->fade_color(strip, led, Fader::Color{0x10,0x06,0,0x03});
+        }
+    }
+
+    m_fader->update();
+    m_running = !m_stopping || m_fader->something_changed();
+}
+
+void ChristmasGlitterAnimation::reset(void)
+{
+    m_stopping = false;
+    m_running = true;
+}