86 lines
3.2 KiB
C++
86 lines
3.2 KiB
C++
#include "SequenceGenerator.h"
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#include "SharedState.h"
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#include "MidiDriver.h"
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#include <Arduino.h>
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void SequenceGenerator::generateTrackData(int track, int themeType, Step (*target)[NUM_STEPS]) {
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randomSeed(melodySeeds[track] + themeType * 12345);
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strategies[currentStrategyIndices[track]]->generate(target, track, numSteps[track], scaleNotes, numScaleNotes, melodySeeds[track] + themeType * 12345, trackIntensity[track]);
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}
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void SequenceGenerator::generateSequenceData(int themeType, Step (*target)[NUM_STEPS]) {
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Serial.println(F("Generating sequence."));
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for(int i=0; i<NUM_TRACKS; i++) {
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SequenceGenerator::generateTrackData(i, themeType, target);
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}
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}
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void SequenceGenerator::mutateSequence(Step (*target)[NUM_STEPS]) {
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for(int i=0; i<NUM_TRACKS; i++) {
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if (random(100) < (trackIntensity[i] * 10)) {
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strategies[currentStrategyIndices[i]]->mutate(target, i, numSteps[i], scaleNotes, numScaleNotes, trackIntensity[i]);
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}
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}
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}
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void SequenceGenerator::generateRandomScale() {
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Serial.println(F("Generating new scale."));
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SequenceGenerator::updateScale();
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}
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void SequenceGenerator::updateScale() {
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// 0: Chromatic, 1: Major, 2: Minor, 3: Harm Min, 4: Pent Maj, 5: Pent Min, 6: Chord Maj, 7: Chord Min, 8: Chord Dim, 9: Chord 7
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int intervals[12];
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int count = 0;
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switch(currentScaleType) {
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case 0: // Chromatic
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for(int i=0; i<12; i++) intervals[count++] = i;
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break;
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case 1: // Major
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intervals[0]=0; intervals[1]=2; intervals[2]=4; intervals[3]=5; intervals[4]=7; intervals[5]=9; intervals[6]=11; count=7;
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break;
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case 2: // Minor
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intervals[0]=0; intervals[1]=2; intervals[2]=3; intervals[3]=5; intervals[4]=7; intervals[5]=8; intervals[6]=10; count=7;
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break;
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case 3: // Harmonic Minor
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intervals[0]=0; intervals[1]=2; intervals[2]=3; intervals[3]=5; intervals[4]=7; intervals[5]=8; intervals[6]=11; count=7;
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break;
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case 4: // Pentatonic Major
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intervals[0]=0; intervals[1]=2; intervals[2]=4; intervals[3]=7; intervals[4]=9; count=5;
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break;
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case 5: // Pentatonic Minor
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intervals[0]=0; intervals[1]=3; intervals[2]=5; intervals[3]=7; intervals[4]=10; count=5;
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break;
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case 6: // Chord Major
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intervals[0]=0; intervals[1]=4; intervals[2]=7; count=3;
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break;
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case 7: // Chord Minor
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intervals[0]=0; intervals[1]=3; intervals[2]=7; count=3;
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break;
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case 8: // Chord Dim
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intervals[0]=0; intervals[1]=3; intervals[2]=6; count=3;
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break;
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case 9: // Chord 7
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intervals[0]=0; intervals[1]=4; intervals[2]=7; intervals[3]=10; count=4;
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break;
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}
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midi.lock();
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numScaleNotes = count;
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for(int i=0; i<count; i++) {
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scaleNotes[i] = (currentRoot + intervals[i]) % 12;
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}
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sortArray(scaleNotes, numScaleNotes);
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midi.unlock();
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}
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void SequenceGenerator::pickRandomScaleType(int themeType) {
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unsigned long seed = themeType * 9999;
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for(int i=0; i<NUM_TRACKS; i++) seed += melodySeeds[i];
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randomSeed(seed);
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currentScaleType = random(10);
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SequenceGenerator::updateScale();
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}
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