Method PaintVuSpaceInvaders

examples/LuminescentGrand/shared/Painter.cpp:450–486

}

void Painter::PaintVuSpaceInvaders(uint32_t /*now_ms*/,
                                   const KeyboardState& keyboard,
                                   const int* led_column_table, int led_column_table_length,
                                   LedRopeInterface* led_rope) {
 led_rope->RawBeginDraw();
 
 Color3i black = Color3i::Black();
                           
 for (int i = 0; i < led_column_table_length; ++i) {
    const Key& key = keyboard.mKeys[i];
    
    const int pixel_count = led_column_table[i];
    const int draw_pixel_count = fl::ceil(pixel_count * fl::sqrt(key.mCurrColor.v_));
    
    const int black_pixel_count = pixel_count - draw_pixel_count;
    
    // If i is even
    if (i % 2 == 0) {
     for (int j = 0; j < black_pixel_count; ++j) {
        led_rope->RawDrawPixel(*led_rope->GetIterator(i));
      }
     for (int j = 0; j < draw_pixel_count; ++j) {
        led_rope->RawDrawPixel(black);
     }
    } else {

      for (int j = 0; j < draw_pixel_count; ++j) {
        led_rope->RawDrawPixel(black);
      }
      
      for (int j = 0; j < black_pixel_count; ++j) {
        led_rope->RawDrawPixel(*led_rope->GetIterator(i));
      }
    }
  }
  led_rope->RawCommitDraw();
}