ILambdaControl Sine Wave animation

IPlugEffect.cpp

#include "IPlugEffect.h"
#include "IPlug_include_in_plug_src.h"
#include "IControls.h"

IPlugEffect::IPlugEffect(const InstanceInfo& info)
: Plugin(info, MakeConfig(kNumParams, kNumPresets))
{
  GetParam(kGain)->InitDouble("Gain", 0., 0., 100.0, 0.01, "%");

#if IPLUG_EDITOR // http://bit.ly/2S64BDd
  mMakeGraphicsFunc = [&]() {
    return MakeGraphics(*this, PLUG_WIDTH, PLUG_HEIGHT, PLUG_FPS, GetScaleForScreen(PLUG_WIDTH, PLUG_HEIGHT));
  };
  
  mLayoutFunc = [&](IGraphics* pGraphics) {
    pGraphics->AttachCornerResizer(EUIResizerMode::Scale, false);
    pGraphics->AttachPanelBackground(COLOR_GRAY);
    pGraphics->LoadFont("Roboto-Regular", ROBOTO_FN);
    const IRECT b = pGraphics->GetBounds();
//    pGraphics->AttachControl(new ITextControl(b.GetMidVPadded(50), "Hello iPlug 2!", IText(50)));
//    pGraphics->AttachControl(new IVKnobControl(b.GetCentredInside(100).GetVShifted(-100), kGain));
    
    static std::array<float, 128> yPoints;
    for (auto i = 0; i<128; i++) {
      yPoints[i] = 0.5f + (std::sin(0. + i * (6.283185307179586/128.f)) * 0.5f);
    }
    
    pGraphics->AttachControl(new ILambdaControl(b.GetCentredInside(200),
      [](ILambdaControl* pCaller, IGraphics& g, IRECT& rect) {
       g.DrawData(COLOR_BLACK, rect, yPoints.data(), 128);
       std::rotate(yPoints.begin(), yPoints.begin() + 1, yPoints.end());
    }, DEFAULT_ANIMATION_DURATION, true /*loop*/, true /*start immediately*/));
  };
#endif
}

#if IPLUG_DSP
void IPlugEffect::ProcessBlock(sample** inputs, sample** outputs, int nFrames)
{
  const double gain = GetParam(kGain)->Value() / 100.;
  const int nChans = NOutChansConnected();
  
  for (int s = 0; s < nFrames; s++) {
    for (int c = 0; c < nChans; c++) {
      outputs[c][s] = inputs[c][s] * gain;
    }
  }
}
#endif