vis_strip.cc

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/*  Strip plot visualizer
 *  Richard Vaughan 30 March 2009
 */

#include "stage.hh"
#include "canvas.hh"
using namespace Stg;

StripPlotVis::StripPlotVis( float x, float y, float w, float h, 
                                                                         size_t len, 
                                                                         Color fgcolor, Color bgcolor,
                                                                         const char* name, const char* wfname )
  : Visualizer( name, wfname ),
         data( new float[len] ),
         len(len),
         count(0),
         x(x),
         y(y),
         w(w),
         h(h),
         min(1e32),
         max(-1e32),
         fgcolor(fgcolor),
         bgcolor(bgcolor)
{
  // zero the data
  memset( data, 0, len * sizeof(float ) );
}

StripPlotVis::~StripPlotVis()
{
  if( data )
         free( data );
}

void StripPlotVis::Visualize( Model* mod, Camera* cam )
{  
  Canvas* canvas = dynamic_cast<WorldGui*>(mod->GetWorld())->GetCanvas();

  if( ! canvas->selected( mod ) ) // == canvas->SelectedVisualizeAll() )
         return;

  canvas->EnterScreenCS();
  
  mod->PushColor( bgcolor );
  glRectf( x,y,w,h );
  mod->PopColor();
  
  mod->PushColor( fgcolor );
  Gl::draw_array( x,y,w,h,data,len,count%len,min,max );
  mod->PopColor();
  
  canvas->LeaveScreenCS();
}

void StripPlotVis::AppendValue( float value )
{
  data[count%len] = value;
  count++;
  
  min = std::min( value, min );
  max = std::max( value, max );
}