More strategies

2026-02-18 19:31:38 +01:00
parent da30471f31
commit 07c30d20ef
4 changed files with 412 additions and 2 deletions
@@ -0,0 +1,116 @@
+#ifndef CELLULAR_AUTOMATA_STRATEGY_H
+#define CELLULAR_AUTOMATA_STRATEGY_H
+
+#include "MelodyStrategy.h"
+#include <Arduino.h>
+
+class CellularAutomataStrategy : public MelodyStrategy {
+public:
+    void generate(Step (*sequence)[NUM_STEPS], int track, int numSteps, int* scaleNotes, int numScaleNotes, int seed) override {
+        randomSeed(seed);
+        if (numScaleNotes == 0) return;
+
+        // 1. Setup CA
+        // Pick a rule. Some rules are more musical (structured chaos) than others.
+        // Rule 30, 90, 110, 184 are classics. Random is fun too.
+        uint8_t rule = random(256); 
+        
+        bool cells[NUM_STEPS];
+        bool next_cells[NUM_STEPS];
+
+        // Init: 50% chance of single center seed, 50% random noise
+        if (random(2) == 0) {
+            for(int i=0; i<numSteps; i++) cells[i] = false;
+            cells[numSteps/2] = true;
+        } else {
+            for(int i=0; i<numSteps; i++) cells[i] = (random(100) < 30);
+        }
+
+        // Evolve for some generations to let patterns emerge
+        int generations = numSteps + random(16);
+
+        for (int g = 0; g < generations; g++) {
+            for (int i = 0; i < numSteps; i++) {
+                bool left = cells[(i - 1 + numSteps) % numSteps];
+                bool center = cells[i];
+                bool right = cells[(i + 1) % numSteps];
+                
+                uint8_t pattern = (left ? 4 : 0) | (center ? 2 : 0) | (right ? 1 : 0);
+                next_cells[i] = (rule >> pattern) & 1;
+            }
+            for(int i=0; i<numSteps; i++) cells[i] = next_cells[i];
+        }
+
+        // Map to notes
+        for (int i = 0; i < numSteps; i++) {
+            if (cells[i]) {
+                int octave = 3 + random(3); // 3, 4, 5
+                sequence[track][i].note = 12 * octave + scaleNotes[random(numScaleNotes)];
+                sequence[track][i].accent = (random(100) < 30);
+                sequence[track][i].tie = (random(100) < 15);
+            } else {
+                sequence[track][i].note = -1;
+                sequence[track][i].accent = false;
+                sequence[track][i].tie = false;
+            }
+        }
+        randomSeed(micros());
+    }
+
+    void generateScale(int* scaleNotes, int& numScaleNotes) override {
+        numScaleNotes = random(5, 8);
+        for (int i = 0; i < 12; i++) {
+            scaleNotes[i] = i;
+        }
+        for (int i = 0; i < 12; i++) {
+            int j = random(12);
+            int temp = scaleNotes[i];
+            scaleNotes[i] = scaleNotes[j];
+            scaleNotes[j] = temp;
+        }
+        sortArray(scaleNotes, numScaleNotes);
+    }
+
+    void mutate(Step (*sequence)[NUM_STEPS], int track, int numSteps, int* scaleNotes, int numScaleNotes) override {
+        // Evolve the current sequence by one generation
+        // Use a random rule for mutation to keep it dynamic
+        uint8_t rule = random(256);
+        
+        Step next_seq[NUM_STEPS];
+        
+        for (int i = 0; i < numSteps; i++) {
+            bool left = (sequence[track][(i - 1 + numSteps) % numSteps].note != -1);
+            bool center = (sequence[track][i].note != -1);
+            bool right = (sequence[track][(i + 1) % numSteps].note != -1);
+            
+            uint8_t pattern = (left ? 4 : 0) | (center ? 2 : 0) | (right ? 1 : 0);
+            bool alive = (rule >> pattern) & 1;
+            
+            if (alive) {
+                if (center) {
+                    // Survived: Keep note
+                    next_seq[i] = sequence[track][i];
+                } else {
+                    // Born: New note
+                    int octave = 3 + random(3);
+                    next_seq[i].note = 12 * octave + scaleNotes[random(numScaleNotes)];
+                    next_seq[i].accent = (random(100) < 30);
+                    next_seq[i].tie = false;
+                }
+            } else {
+                // Died
+                next_seq[i].note = -1;
+                next_seq[i].accent = false;
+                next_seq[i].tie = false;
+            }
+        }
+        
+        for(int i=0; i<numSteps; i++) sequence[track][i] = next_seq[i];
+    }
+
+    const char* getName() override {
+        return "Cellular";
+    }
+};
+
+#endif