diff options
| -rw-r--r-- | main.cpp | 79 |
1 files changed, 78 insertions, 1 deletions
@@ -2,10 +2,51 @@ #define _USE_MATH_DEFINES #include <cmath> #include <iostream> +#include <vector> const float AMPLITUDE = 0.2f; +float sequence[8] = { 130.81f, 220.f, 130.81f, 440.f, 330.f, 440.f, 130.81f, 261.63f }; -const float sequence[8] = { 130.81f, 220.f, 130.81f, 440.f, 330.f, 440.f, 130.81f, 261.63f }; +class Knob { +public: + Knob(int x, int y, float *valuePtr) + : m_x(x), m_y(y), value(valuePtr) {} + + void Draw(SDL_Renderer*); + bool InBounds(int x, int y); + + float *value; + float valueScaling = 0.3f; +private: + int m_x, m_y; +}; + +std::vector<Knob> knobs; + +class Window { +public: + Window(); +private: + bool m_isRunning{ false }; +}; + +void Knob::Draw(SDL_Renderer *renderer) +{ + constexpr int Radius = 25; + SDL_Rect rect = { m_x, m_y, Radius, Radius }; + SDL_RenderDrawRect(renderer, &rect); + + SDL_RenderDrawLine(renderer, m_x, m_y + (*value * valueScaling), m_x + Radius, m_y + (*value * valueScaling)); +} + +bool Knob::InBounds(int x, int y) +{ + constexpr int Radius = 25; + SDL_Rect rect = { m_x, m_y, Radius, Radius }; + SDL_Point point = { x, y }; + + return SDL_PointInRect(&point, &rect); +} struct CallbackInfo { int samplesDone; @@ -53,6 +94,10 @@ void DrawInterface(SDL_Renderer* renderer, int currentStep) rect.x += rect.w + 8; } + + for (Knob& knob : knobs) { + knob.Draw(renderer); + } } int main(int argc, char** argv) @@ -92,13 +137,45 @@ int main(int argc, char** argv) SDL_PauseAudio(0); + knobs.emplace_back(10, 120, sequence); + knobs.emplace_back(40, 120, sequence + 1); + knobs.emplace_back(70, 120, sequence + 2); + knobs.emplace_back(110, 120, sequence + 3); + knobs.emplace_back(140, 120, sequence + 4); + knobs.emplace_back(170, 120, sequence + 5); + knobs.emplace_back(210, 120, sequence + 6); + knobs.emplace_back(240, 120, sequence + 7); + bool running = true; + Knob* mouseKnob = nullptr; + int yStart = 0; while (running) { while (SDL_PollEvent(&event)) { switch (event.type) { case SDL_QUIT: running = false; break; + case SDL_MOUSEBUTTONDOWN: + for (Knob& knob : knobs) { + if (knob.InBounds(event.button.x, event.button.y)) { + mouseKnob = &knob; + yStart = event.button.y; + break; + } + } + break; + case SDL_MOUSEMOTION: + if (mouseKnob) { + *mouseKnob->value -= (yStart - event.button.y); + yStart = event.button.y; + if (*mouseKnob->value < 0) *mouseKnob->value = 0; + } + + break; + case SDL_MOUSEBUTTONUP: + mouseKnob = nullptr; + yStart = 0; + break; } } |