wip: filter gui

inc/Renderer.h

@@ -1,4 +1,5 @@
 #pragma once
+#include "Filter.h"
 #include "ADSR.h"
 #include "Synth.h"
 #include "SynthGuiState.h"
@@ -19,7 +20,8 @@ class Renderer {
     void draw_signal(Synth& synth, SynthGuiState& synth_gui);
     void draw_adsr_panel(ADSR* adsr, ADSRGuiState& gui_adsr,
                          const Rectangle& panel_bounds, float panel_y_offset);
-
+    void draw_second_panel(Rectangle& bounds);
+    float draw_filter_panel(Filter* filter, FilterGuiState& gui_filter, const Rectangle& panel_bounds);
   public:
     Renderer(/* args */);
     ~Renderer();

inc/Synth.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "ADSR.h"
+#include "Filter.h"
 #include "Adder.h"
 #include "Effect.h"
 #include "Note.h"
@@ -32,4 +33,5 @@ class Synth {
     const std::vector<Oscillator*>& GetOscillators() { return m_oscillators; }
     const bool& GetIsNoteTriggered() { return is_note_triggered; }
     ADSR* GetADSR() { return (ADSR*)m_effects[0]; }
+    Filter* GetFilter() { return (Filter*)m_effects[1]; }
 };

inc/SynthGuiState.h

@@ -18,7 +18,14 @@ struct ADSRGuiState {
     float release;
 };
 
+struct FilterGuiState {
+    float freq;
+    float res;
+    //todo: type
+};
+
 struct SynthGuiState {
     std::vector<OscillatorGuiState*> oscillators;
     ADSRGuiState adsr;
+    FilterGuiState filter;
 };