Adds DiatonicCV module

Author: aaronstatic

README.md

@@ -33,6 +33,17 @@ Generates a scale and outputs a polyphonic 1v/oct signal with 7 notes + quantize
 * **Mode**: Chooses the scale mode (input range -4v to 4v)
 * **Quantizers**: 4 Quantizers that will quantize a monophonic input to the selected scale
 
+## DiatonicCV
+![DiatonicCV](https://i.imgur.com/aJNhwkL.jpg "DiatonicCV")
+
+Generates a diatonic chord from the provided scale, if one is provided via the poly input (otherwise C Major is used). Best used in combination with ScaleCV above.
+
+* **Octave**: Which octave to transpose the chord to (1v/oct, input range -4v to 4v)
+* **Chord**: Which chord degree in the scale (I - VII, input range 0v to 6v)
+* **Type**: Which chord type (triad, seventh, ninth, input range 0v to 3v)
+* **Inversion**: Chooses chord inversion (input range 0v to 4v)
+* **Voicing**: Chooses the chord voicing (input range 0v to 4v, refer to ChordCV for more info)  
+
 ## RandomNoteCV
 ![RandomNoteCV](https://i.imgur.com/xK91S79.jpg "RandomNoteCV")
 

plugin.json

@@ -25,6 +25,12 @@
         "description": "Generates a scale",
         "tags": ["Polyphonic","Tuner","Quantizer"]
     },
+    {
+        "slug": "DiatonicCV",
+        "name": "DiatonicCV",
+        "description": "Generates diatonic chords from the provided scale",
+        "tags": ["Polyphonic","Tuner"]
+    },
     {
         "slug": "RandomNoteCV",
         "name": "RandomNoteCV",

res/DiatonicCV.svg

@@ -0,0 +1,219 @@
+#include "plugin.hpp"
+#include "musiclib.hpp"
+
+struct DiatonicCV : Module {
+	enum ParamIds {
+		OCTAVE_PARAM,
+		CHORD_PARAM,
+		TYPE_PARAM,
+		INVERSION_PARAM,
+		VOICING_PARAM,
+		NUM_PARAMS
+	};
+	enum InputIds {
+		POLY_INPUT,
+		OCTAVE_INPUT,
+		CHORD_INPUT,
+		TYPE_INPUT,
+		INVERSION_INPUT,
+		VOICING_INPUT,
+		NUM_INPUTS
+	};
+	enum OutputIds {
+		POLY_OUTPUT,
+		NUM_OUTPUTS
+	};
+	enum LightIds {
+		NUM_LIGHTS
+	};
+
+	int octave = 4;
+	int chord = 0;
+	int chord_type = 0;
+	bool inverted = false;
+	bool hasPoly = true;
+	int bass_note = 0;
+	float polyNotes_v[16] = {0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f};
+	int polyNotes[16] = {48,48,48,48,48,48,48,48,48,48,48,48,48,48,48,48};
+	int polyChannels = 0;
+	int inversion = 0;
+	int voicing = 0;
+	struct chord playing_chord;
+	struct scale cmajor;
+
+	RefreshCounter refresh;
+
+	DiatonicCV() {
+		config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS, NUM_LIGHTS);
+		configParam(OCTAVE_PARAM, -4.0, 4.0, 0.0, "Octave");
+		configParam(CHORD_PARAM, 0, 6.0, 0.0, "Chord (I - VII)");
+		configParam(TYPE_PARAM, 0, 2.0, 0.0, "Chord Type");
+		configParam(INVERSION_PARAM, 0.0, 4.0, 0.0, "Inversion");
+		configParam(VOICING_PARAM, 0.0, 4.0, 0.0, "Voicing");
+
+		configInput(POLY_INPUT, "Polyphonic");
+		configInput(OCTAVE_INPUT, "Octave");
+		configInput(CHORD_INPUT, "Chord");
+		configInput(TYPE_INPUT, "Chord Type");
+		configInput(INVERSION_INPUT, "Inversion");
+		configInput(VOICING_INPUT, "Voicing");
+
+		configOutput(POLY_OUTPUT, "Polyphonic");
+
+		cmajor = get_scale(0,0);
+	}
+
+	void process(const ProcessArgs& args) override;
+};
+
+void DiatonicCV::process(const ProcessArgs &args){
+	if (refresh.processInputs()) {
+		if(inputs[POLY_INPUT].isConnected()){
+			polyChannels = inputs[POLY_INPUT].getChannels();
+			for (int c = 0; c < 16; c++) {
+				float v = inputs[POLY_INPUT].getVoltage(c);
+				polyNotes_v[c] = v;
+				polyNotes[c] = voltage_to_note_int(v);
+			}
+			//sort the notes in ascending order
+			std::sort(std::begin(polyNotes), polyNotes + polyChannels);
+		}else{
+			//Just make it C Major
+			polyChannels = 7;
+			for(int t=0; t<7; t++){
+				polyNotes[t] = cmajor.notes[t];
+			}
+		}
+
+		float octave_v = params[OCTAVE_PARAM].getValue();
+		if(inputs[OCTAVE_INPUT].isConnected()){
+			octave_v = inputs[OCTAVE_INPUT].getVoltage();
+		}
+		octave = (int)round(octave_v) + 4;
+
+		float chord_v = params[CHORD_PARAM].getValue();
+		if(inputs[CHORD_INPUT].isConnected()){
+			chord_v = inputs[CHORD_INPUT].getVoltage();
+			if(chord_v < 0.0f) chord_v = 0.0f;
+			if(chord_v > 7.0f) chord_v = 7.0f;
+		}
+		chord = (int)round(chord_v);
+
+		float type_v = params[TYPE_PARAM].getValue();
+		if(inputs[TYPE_INPUT].isConnected()){
+			type_v = inputs[TYPE_INPUT].getVoltage();
+			if(type_v < 0.0f) type_v = 0.0f;
+			if(type_v > 3.0f) type_v = 3.0f;
+		}
+		chord_type = (int)round(type_v);
+
+		//inversion
+		inversion = (int)round(params[INVERSION_PARAM].getValue());
+		if(inputs[INVERSION_PARAM].isConnected()){
+			inversion = (int)clamp(round(inputs[INVERSION_PARAM].getVoltage()),0.0f,3.0f);
+		}
+
+		//voicing
+		voicing = (int)round(params[VOICING_PARAM].getValue());
+		if(inputs[VOICING_PARAM].isConnected()){
+			voicing = (int)clamp(round(inputs[VOICING_PARAM].getVoltage()),0.0f,4.0f);
+		}
+
+		//Make the chord
+		playing_chord = get_diatonic_chord(polyNotes, polyChannels, octave, chord, chord_type, inversion, voicing);
+	}
+
+	if (refresh.processLights()) {
+
+	}
+
+	outputs[POLY_OUTPUT].setChannels(playing_chord.num_notes);
+	for(int t=0; t<playing_chord.num_notes; t++){
+		outputs[POLY_OUTPUT].setVoltage(note_to_voltage(playing_chord.notes[t]),t);
+	}
+}
+
+
+struct DiatonicCVWidget : ModuleWidget {
+	struct ChordDisplayWidget : TransparentWidget {
+		DiatonicCV* module;
+		char text[10];
+
+		ChordDisplayWidget(Vec _pos, Vec _size, DiatonicCV* _module) {
+			box.size = _size;
+			box.pos = _pos.minus(_size.div(2));
+			module = _module;
+		}
+
+		void draw(const DrawArgs &args) override {
+			std::shared_ptr<Font> font = APP->window->loadFont(asset::plugin(pluginInstance, "res/fonts/PixelOperator.ttf"));
+			if(font){
+				NVGcolor textColor = prepareDisplay(args.vg, &box, 22);
+				nvgFontFaceId(args.vg, font->handle);
+				nvgTextLetterSpacing(args.vg, -1.5);
+				nvgTextAlign(args.vg, NVG_ALIGN_CENTER);
+
+				Vec textPos = Vec(box.size.x/2, 21.0f);
+				nvgFillColor(args.vg, textColor);
+
+				if (module != NULL && module->playing_chord.num_notes > 2){
+					detect_chord_name_simple(module->playing_chord,text);
+				}else{
+					snprintf(text, 9, "         ");
+				}
+
+				nvgText(args.vg, textPos.x, textPos.y, text, NULL);
+			}
+		}
+
+	};
+
+	DiatonicCVWidget(DiatonicCV* module) {
+		setModule(module);
+		setPanel(APP->window->loadSvg(asset::plugin(pluginInstance, "res/DiatonicCV.svg")));
+
+		addChild(createWidget<ScrewSilver>(Vec(RACK_GRID_WIDTH, 0)));
+		addChild(createWidget<ScrewSilver>(Vec(box.size.x - 2 * RACK_GRID_WIDTH, 0)));
+		addChild(createWidget<ScrewSilver>(Vec(RACK_GRID_WIDTH, RACK_GRID_HEIGHT - RACK_GRID_WIDTH)));
+		addChild(createWidget<ScrewSilver>(Vec(box.size.x - 2 * RACK_GRID_WIDTH, RACK_GRID_HEIGHT - RACK_GRID_WIDTH)));
+
+		const int centerX = box.size.x / 2;
+
+		ChordDisplayWidget* display = new ChordDisplayWidget(Vec(centerX, 55), Vec(76, 29), module);
+		addChild(display);
+
+		addInput(createInputCentered<PJ301MPort>(Vec(centerX, 95), module, DiatonicCV::POLY_INPUT));
+
+		const int offsetXL = 40;
+		const int spacingY = 45;
+		const int y1 = 134;
+		const int y2 = y1 + spacingY;
+		const int y3 = y2 + spacingY;
+
+
+		addParam(createParamCentered<Rogan2PWhite>(Vec(centerX,y1), module, DiatonicCV::OCTAVE_PARAM));
+		addInput(createInputCentered<PJ301MPort>(Vec(centerX - offsetXL, y1), module, DiatonicCV::OCTAVE_INPUT));
+
+		addParam(createParamCentered<Rogan2PWhite>(Vec(centerX,y2), module, DiatonicCV::CHORD_PARAM));
+		addInput(createInputCentered<PJ301MPort>(Vec(centerX - offsetXL, y2), module, DiatonicCV::CHORD_INPUT));
+
+		addParam(createParamCentered<Rogan2PWhite>(Vec(centerX,y3), module, DiatonicCV::TYPE_PARAM));
+		addInput(createInputCentered<PJ301MPort>(Vec(centerX - offsetXL, y3), module, DiatonicCV::TYPE_INPUT));
+
+		static const int offsetX2 = 14;
+		static const int posY = 269;
+
+		const int offsetXL2 = 42;
+
+		addParam(createParamCentered<RoundSmallBlackKnob>(Vec(centerX - offsetX2,posY), module, DiatonicCV::INVERSION_PARAM));
+		addInput(createInputCentered<PJ301MPort>(Vec(centerX - offsetXL2, posY), module, DiatonicCV::INVERSION_INPUT));
+
+		addParam(createParamCentered<RoundSmallBlackKnob>(Vec(centerX + offsetX2,posY), module, DiatonicCV::VOICING_PARAM));
+		addInput(createInputCentered<PJ301MPort>(Vec(centerX + offsetXL2, posY), module, DiatonicCV::VOICING_INPUT));
+
+		addOutput(createOutputCentered<PJ301MPort>(Vec(centerX, 332), module, DiatonicCV::POLY_OUTPUT));
+	}
+};
+
+
+Model* modelDiatonicCV = createModel<DiatonicCV, DiatonicCVWidget>("DiatonicCV");

src/DiatonicCV.cpp

@@ -68,6 +68,8 @@ void RandomNoteCV::process(const ProcessArgs &args){
 				polyNotes_v[c] = v;
 				polyNotes[c] = voltage_to_note_int(v);
 			}
+			//sort the notes in ascending order
+			std::sort(std::begin(polyNotes), polyNotes + polyChannels);
 		}else{
 			hasPoly = false;
 		}