.. _program_listing_file_src_animation_vuanimation.cpp:

Program Listing for File vuanimation.cpp
========================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_animation_vuanimation.cpp>` (``src/animation/vuanimation.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #include "vuanimation.h"
   
   namespace PixelMaestro {
       VUAnimation::VUAnimation(Section& section) : Animation(section) {
           type_ = AnimationType::VUMeter;
           map();
       }
   
       void VUAnimation::map() {
           // Expand or shrink sample visualization based on Section size
           double sample_index = 0;
           double gap = (NUM_SAMPLES / 2) / dimensions_.x;
   
           for (uint16_t x = 0; x < dimensions_.x; x++) {
               int y_max = static_cast<int>(vReal[static_cast<int>(sample_index)]);
               for (uint16_t y = 0; y < dimensions_.y; y++) {
                   // Check to see if the Pixel is outside of the sample, assuming we're drawing it from bottom to top
                   if (dimensions_.y - y > y_max) {
                       set_map_color_index(x, y, 255);
                   }
                   else {
                       set_map_color_index(x, y, 0);
                   }
               }
   
               sample_index += gap;
           }
       }
   
       void VUAnimation::set_sample(uint8_t index, double sample) {
           vReal[index] = sample;
           vImg[index] = 0;
       }
   
       void VUAnimation::update() { }
   }