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			606 lines
		
	
	
	
		
			20 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			606 lines
		
	
	
	
		
			20 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
#include <scwx/qt/gl/draw/placefile_lines.hpp>
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#include <scwx/qt/util/geographic_lib.hpp>
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#include <scwx/qt/util/maplibre.hpp>
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#include <scwx/qt/util/tooltip.hpp>
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#include <scwx/util/logger.hpp>
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#include <execution>
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namespace scwx
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{
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namespace qt
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{
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namespace gl
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{
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namespace draw
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{
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static const std::string logPrefix_ = "scwx::qt::gl::draw::placefile_lines";
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static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
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static constexpr std::size_t kVerticesPerTriangle  = 3;
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static constexpr std::size_t kVerticesPerRectangle = kVerticesPerTriangle * 2;
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static constexpr std::size_t kPointsPerVertex      = 9;
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// Threshold, start time, end time
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static constexpr std::size_t kIntegersPerVertex_ = 3;
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static const boost::gil::rgba8_pixel_t kBlack_ {0, 0, 0, 255};
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class PlacefileLines::Impl
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{
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public:
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   struct LineHoverEntry
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   {
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      std::shared_ptr<const gr::Placefile::LineDrawItem> di_;
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      glm::vec2 p1_;
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      glm::vec2 p2_;
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      glm::vec2 otl_;
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      glm::vec2 otr_;
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      glm::vec2 obl_;
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      glm::vec2 obr_;
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   };
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   explicit Impl(const std::shared_ptr<GlContext>& context) :
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       context_ {context},
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       shaderProgram_ {nullptr},
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       uMVPMatrixLocation_(GL_INVALID_INDEX),
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       uMapMatrixLocation_(GL_INVALID_INDEX),
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       uMapScreenCoordLocation_(GL_INVALID_INDEX),
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       uMapDistanceLocation_(GL_INVALID_INDEX),
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       uSelectedTimeLocation_(GL_INVALID_INDEX),
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       vao_ {GL_INVALID_INDEX},
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       vbo_ {GL_INVALID_INDEX},
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       numVertices_ {0}
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   {
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   }
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   ~Impl() {}
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   void BufferLine(const std::shared_ptr<const gr::Placefile::LineDrawItem>& di,
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                   const gr::Placefile::LineDrawItem::Element&               e1,
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                   const gr::Placefile::LineDrawItem::Element&               e2,
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                   const float                         width,
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                   const units::angle::degrees<double> angle,
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                   const boost::gil::rgba8_pixel_t     color,
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                   const GLint                         threshold,
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                   const GLint                         startTime,
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                   const GLint                         endTime,
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                   bool                                bufferHover = false);
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   void
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   UpdateBuffers(const std::shared_ptr<const gr::Placefile::LineDrawItem>& di);
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   void Update();
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   std::shared_ptr<GlContext> context_;
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   bool dirty_ {false};
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   bool thresholded_ {false};
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   std::chrono::system_clock::time_point selectedTime_ {};
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   std::mutex lineMutex_ {};
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   std::size_t currentNumLines_ {};
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   std::size_t newNumLines_ {};
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   std::vector<float> currentLinesBuffer_ {};
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   std::vector<GLint> currentIntegerBuffer_ {};
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   std::vector<float> newLinesBuffer_ {};
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   std::vector<GLint> newIntegerBuffer_ {};
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   std::vector<LineHoverEntry> currentHoverLines_ {};
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   std::vector<LineHoverEntry> newHoverLines_ {};
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   std::shared_ptr<ShaderProgram> shaderProgram_;
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   GLint                          uMVPMatrixLocation_;
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   GLint                          uMapMatrixLocation_;
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   GLint                          uMapScreenCoordLocation_;
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   GLint                          uMapDistanceLocation_;
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   GLint                          uSelectedTimeLocation_;
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   GLuint                vao_;
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   std::array<GLuint, 2> vbo_;
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   GLsizei numVertices_;
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};
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PlacefileLines::PlacefileLines(const std::shared_ptr<GlContext>& context) :
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    DrawItem(), p(std::make_unique<Impl>(context))
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{
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}
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PlacefileLines::~PlacefileLines() = default;
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PlacefileLines::PlacefileLines(PlacefileLines&&) noexcept            = default;
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PlacefileLines& PlacefileLines::operator=(PlacefileLines&&) noexcept = default;
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void PlacefileLines::set_selected_time(
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   std::chrono::system_clock::time_point selectedTime)
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{
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   p->selectedTime_ = selectedTime;
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}
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void PlacefileLines::set_thresholded(bool thresholded)
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{
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   p->thresholded_ = thresholded;
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}
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void PlacefileLines::Initialize()
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{
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   p->shaderProgram_ = p->context_->GetShaderProgram(
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      {{GL_VERTEX_SHADER, ":/gl/geo_texture2d.vert"},
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       {GL_GEOMETRY_SHADER, ":/gl/threshold.geom"},
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       {GL_FRAGMENT_SHADER, ":/gl/color.frag"}});
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   p->uMVPMatrixLocation_ = p->shaderProgram_->GetUniformLocation("uMVPMatrix");
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   p->uMapMatrixLocation_ = p->shaderProgram_->GetUniformLocation("uMapMatrix");
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   p->uMapScreenCoordLocation_ =
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      p->shaderProgram_->GetUniformLocation("uMapScreenCoord");
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   p->uMapDistanceLocation_ =
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      p->shaderProgram_->GetUniformLocation("uMapDistance");
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   p->uSelectedTimeLocation_ =
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      p->shaderProgram_->GetUniformLocation("uSelectedTime");
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   glGenVertexArrays(1, &p->vao_);
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   glGenBuffers(2, p->vbo_.data());
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   glBindVertexArray(p->vao_);
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   glBindBuffer(GL_ARRAY_BUFFER, p->vbo_[0]);
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   glBufferData(GL_ARRAY_BUFFER, 0u, nullptr, GL_DYNAMIC_DRAW);
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   // NOLINTBEGIN(modernize-use-nullptr)
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   // NOLINTBEGIN(performance-no-int-to-ptr)
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   // NOLINTBEGIN(cppcoreguidelines-avoid-magic-numbers)
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   // aLatLong
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   glVertexAttribPointer(0,
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                         2,
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                         GL_FLOAT,
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                         GL_FALSE,
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                         kPointsPerVertex * sizeof(float),
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                         static_cast<void*>(0));
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   glEnableVertexAttribArray(0);
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   // aXYOffset
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   glVertexAttribPointer(1,
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                         2,
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                         GL_FLOAT,
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                         GL_FALSE,
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                         kPointsPerVertex * sizeof(float),
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                         reinterpret_cast<void*>(2 * sizeof(float)));
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   glEnableVertexAttribArray(1);
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   // aModulate
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   glVertexAttribPointer(3,
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                         4,
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                         GL_FLOAT,
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                         GL_FALSE,
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                         kPointsPerVertex * sizeof(float),
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                         reinterpret_cast<void*>(4 * sizeof(float)));
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   glEnableVertexAttribArray(3);
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   // aAngle
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   glVertexAttribPointer(4,
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                         1,
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                         GL_FLOAT,
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                         GL_FALSE,
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                         kPointsPerVertex * sizeof(float),
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                         reinterpret_cast<void*>(8 * sizeof(float)));
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   glEnableVertexAttribArray(4);
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   glBindBuffer(GL_ARRAY_BUFFER, p->vbo_[1]);
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   glBufferData(GL_ARRAY_BUFFER, 0u, nullptr, GL_DYNAMIC_DRAW);
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   // aThreshold
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   glVertexAttribIPointer(5, //
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                          1,
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                          GL_INT,
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                          kIntegersPerVertex_ * sizeof(GLint),
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                          static_cast<void*>(0));
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   glEnableVertexAttribArray(5);
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   // aTimeRange
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   glVertexAttribIPointer(6, //
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                          2,
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                          GL_INT,
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                          kIntegersPerVertex_ * sizeof(GLint),
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                          reinterpret_cast<void*>(1 * sizeof(GLint)));
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   glEnableVertexAttribArray(6);
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   // aDisplayed
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   glVertexAttribI1i(7, 1);
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   // NOLINTEND(cppcoreguidelines-avoid-magic-numbers)
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   // NOLINTEND(performance-no-int-to-ptr)
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   // NOLINTEND(modernize-use-nullptr)
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   p->dirty_ = true;
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}
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void PlacefileLines::Render(
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   const QMapLibre::CustomLayerRenderParameters& params)
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{
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   std::unique_lock lock {p->lineMutex_};
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   if (p->currentNumLines_ > 0)
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   {
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      glBindVertexArray(p->vao_);
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      p->Update();
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      p->shaderProgram_->Use();
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      UseRotationProjection(params, p->uMVPMatrixLocation_);
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      UseMapProjection(
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         params, p->uMapMatrixLocation_, p->uMapScreenCoordLocation_);
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      if (p->thresholded_)
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      {
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         // If thresholding is enabled, set the map distance
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         units::length::nautical_miles<float> mapDistance =
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            util::maplibre::GetMapDistance(params);
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         glUniform1f(p->uMapDistanceLocation_, mapDistance.value());
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      }
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      else
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      {
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         // If thresholding is disabled, set the map distance to 0
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         glUniform1f(p->uMapDistanceLocation_, 0.0f);
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      }
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      // Selected time
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      std::chrono::system_clock::time_point selectedTime =
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         (p->selectedTime_ == std::chrono::system_clock::time_point {}) ?
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            std::chrono::system_clock::now() :
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            p->selectedTime_;
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      glUniform1i(
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         p->uSelectedTimeLocation_,
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         static_cast<GLint>(std::chrono::duration_cast<std::chrono::minutes>(
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                               selectedTime.time_since_epoch())
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                               .count()));
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      // Draw icons
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      glDrawArrays(GL_TRIANGLES, 0, p->numVertices_);
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   }
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}
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void PlacefileLines::Deinitialize()
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{
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   glDeleteVertexArrays(1, &p->vao_);
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   glDeleteBuffers(2, p->vbo_.data());
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   std::unique_lock lock {p->lineMutex_};
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   p->currentLinesBuffer_.clear();
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   p->currentIntegerBuffer_.clear();
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   p->currentHoverLines_.clear();
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}
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void PlacefileLines::StartLines()
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{
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   // Clear the new buffers
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   p->newLinesBuffer_.clear();
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   p->newIntegerBuffer_.clear();
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   p->newHoverLines_.clear();
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   p->newNumLines_ = 0u;
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}
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void PlacefileLines::AddLine(
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   const std::shared_ptr<gr::Placefile::LineDrawItem>& di)
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{
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   if (di != nullptr && !di->elements_.empty())
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   {
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      p->UpdateBuffers(di);
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      p->newNumLines_ += (di->elements_.size() - 1) * 2;
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   }
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}
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void PlacefileLines::FinishLines()
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{
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   std::unique_lock lock {p->lineMutex_};
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   // Swap buffers
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   p->currentLinesBuffer_.swap(p->newLinesBuffer_);
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   p->currentIntegerBuffer_.swap(p->newIntegerBuffer_);
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   p->currentHoverLines_.swap(p->newHoverLines_);
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   // Clear the new buffers
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   p->newLinesBuffer_.clear();
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   p->newIntegerBuffer_.clear();
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   p->newHoverLines_.clear();
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   // Update the number of lines
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   p->currentNumLines_ = p->newNumLines_;
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   p->numVertices_ =
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      static_cast<GLsizei>(p->currentNumLines_ * kVerticesPerRectangle);
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   // Mark the draw item dirty
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   p->dirty_ = true;
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}
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void PlacefileLines::Impl::UpdateBuffers(
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   const std::shared_ptr<const gr::Placefile::LineDrawItem>& di)
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{
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   // Threshold value
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   units::length::nautical_miles<double> threshold = di->threshold_;
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   GLint thresholdValue = static_cast<GLint>(std::round(threshold.value()));
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   // Start and end time
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   GLint startTime =
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      static_cast<GLint>(std::chrono::duration_cast<std::chrono::minutes>(
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                            di->startTime_.time_since_epoch())
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                            .count());
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   GLint endTime =
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      static_cast<GLint>(std::chrono::duration_cast<std::chrono::minutes>(
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                            di->endTime_.time_since_epoch())
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                            .count());
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   std::vector<units::angle::degrees<double>> angles {};
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   angles.reserve(di->elements_.size() - 1);
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   // For each element pair inside a Line statement, render a black line
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   for (std::size_t i = 0; i < di->elements_.size() - 1; ++i)
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   {
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      // Latitude and longitude coordinates in degrees
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      const float lat1 = static_cast<float>(di->elements_[i].latitude_);
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      const float lon1 = static_cast<float>(di->elements_[i].longitude_);
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      const float lat2 = static_cast<float>(di->elements_[i + 1].latitude_);
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      const float lon2 = static_cast<float>(di->elements_[i + 1].longitude_);
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      // Calculate angle
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      const units::angle::degrees<double> angle =
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         util::GeographicLib::GetAngle(lat1, lon1, lat2, lon2);
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      angles.push_back(angle);
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      // Buffer line with hover text
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      BufferLine(di,
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                 di->elements_[i],
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                 di->elements_[i + 1],
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                 di->width_ + 2,
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                 angle,
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                 kBlack_,
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                 thresholdValue,
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                 startTime,
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                 endTime,
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                 true);
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   }
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   // For each element pair inside a Line statement, render a colored line
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   for (std::size_t i = 0; i < di->elements_.size() - 1; ++i)
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   {
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      BufferLine(di,
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                 di->elements_[i],
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                 di->elements_[i + 1],
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                 di->width_,
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                 angles[i],
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                 di->color_,
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                 thresholdValue,
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                 startTime,
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                 endTime);
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   }
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}
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void PlacefileLines::Impl::BufferLine(
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   const std::shared_ptr<const gr::Placefile::LineDrawItem>& di,
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   const gr::Placefile::LineDrawItem::Element&               e1,
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   const gr::Placefile::LineDrawItem::Element&               e2,
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   const float                                               width,
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   const units::angle::degrees<double>                       angle,
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   const boost::gil::rgba8_pixel_t                           color,
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   const GLint                                               threshold,
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   const GLint                                               startTime,
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   const GLint                                               endTime,
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   bool                                                      bufferHover)
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{
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   // Latitude and longitude coordinates in degrees
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   const float lat1 = static_cast<float>(e1.latitude_);
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   const float lon1 = static_cast<float>(e1.longitude_);
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   const float lat2 = static_cast<float>(e2.latitude_);
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   const float lon2 = static_cast<float>(e2.longitude_);
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   // TODO: Base X/Y offsets in pixels
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   // const float x1 = static_cast<float>(e1.x_);
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   // const float y1 = static_cast<float>(e1.y_);
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   // const float x2 = static_cast<float>(e2.x_);
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   // const float y2 = static_cast<float>(e2.y_);
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   // Angle
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   const float a = static_cast<float>(angle.value());
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   // Final X/Y offsets in pixels
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   const float hw = width * 0.5f;
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   const float lx = -hw;
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   const float rx = +hw;
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   const float ty = +hw;
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   const float by = -hw;
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   // Modulate color
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   const float mc0 = color[0] / 255.0f;
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   const float mc1 = color[1] / 255.0f;
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   const float mc2 = color[2] / 255.0f;
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   const float mc3 = color[3] / 255.0f;
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   // Update buffers
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   newLinesBuffer_.insert(newLinesBuffer_.end(),
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                          {
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                             // Line
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                             lat1, lon1, lx, by, mc0, mc1, mc2, mc3, a, // BL
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                             lat2, lon2, lx, ty, mc0, mc1, mc2, mc3, a, // TL
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                             lat1, lon1, rx, by, mc0, mc1, mc2, mc3, a, // BR
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                             lat1, lon1, rx, by, mc0, mc1, mc2, mc3, a, // BR
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                             lat2, lon2, rx, ty, mc0, mc1, mc2, mc3, a, // TR
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                             lat2, lon2, lx, ty, mc0, mc1, mc2, mc3, a  // TL
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                          });
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   newIntegerBuffer_.insert(newIntegerBuffer_.end(),
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                            {threshold,
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						|
                             startTime,
 | 
						|
                             endTime,
 | 
						|
                             threshold,
 | 
						|
                             startTime,
 | 
						|
                             endTime,
 | 
						|
                             threshold,
 | 
						|
                             startTime,
 | 
						|
                             endTime,
 | 
						|
                             threshold,
 | 
						|
                             startTime,
 | 
						|
                             endTime,
 | 
						|
                             threshold,
 | 
						|
                             startTime,
 | 
						|
                             endTime,
 | 
						|
                             threshold,
 | 
						|
                             startTime,
 | 
						|
                             endTime});
 | 
						|
 | 
						|
   if (bufferHover && !di->hoverText_.empty())
 | 
						|
   {
 | 
						|
      const units::angle::radians<double> radians = angle;
 | 
						|
 | 
						|
      const auto sc1 = util::maplibre::LatLongToScreenCoordinate({lat1, lon1});
 | 
						|
      const auto sc2 = util::maplibre::LatLongToScreenCoordinate({lat2, lon2});
 | 
						|
 | 
						|
      const float cosAngle = cosf(static_cast<float>(radians.value()));
 | 
						|
      const float sinAngle = sinf(static_cast<float>(radians.value()));
 | 
						|
 | 
						|
      const glm::mat2 rotate {cosAngle, -sinAngle, sinAngle, cosAngle};
 | 
						|
 | 
						|
      const glm::vec2 otl = rotate * glm::vec2 {-hw, +hw};
 | 
						|
      const glm::vec2 otr = rotate * glm::vec2 {+hw, +hw};
 | 
						|
      const glm::vec2 obl = rotate * glm::vec2 {-hw, -hw};
 | 
						|
      const glm::vec2 obr = rotate * glm::vec2 {+hw, -hw};
 | 
						|
 | 
						|
      newHoverLines_.emplace_back(
 | 
						|
         LineHoverEntry {di, sc1, sc2, otl, otr, obl, obr});
 | 
						|
   }
 | 
						|
}
 | 
						|
 | 
						|
void PlacefileLines::Impl::Update()
 | 
						|
{
 | 
						|
   // If the placefile has been updated
 | 
						|
   if (dirty_)
 | 
						|
   {
 | 
						|
      // Buffer lines data
 | 
						|
      glBindBuffer(GL_ARRAY_BUFFER, vbo_[0]);
 | 
						|
      glBufferData(
 | 
						|
         GL_ARRAY_BUFFER,
 | 
						|
         static_cast<GLsizeiptr>(sizeof(float) * currentLinesBuffer_.size()),
 | 
						|
         currentLinesBuffer_.data(),
 | 
						|
         GL_DYNAMIC_DRAW);
 | 
						|
 | 
						|
      // Buffer threshold data
 | 
						|
      glBindBuffer(GL_ARRAY_BUFFER, vbo_[1]);
 | 
						|
      glBufferData(
 | 
						|
         GL_ARRAY_BUFFER,
 | 
						|
         static_cast<GLsizeiptr>(sizeof(GLint) * currentIntegerBuffer_.size()),
 | 
						|
         currentIntegerBuffer_.data(),
 | 
						|
         GL_DYNAMIC_DRAW);
 | 
						|
   }
 | 
						|
 | 
						|
   dirty_ = false;
 | 
						|
}
 | 
						|
 | 
						|
bool PlacefileLines::RunMousePicking(
 | 
						|
   const QMapLibre::CustomLayerRenderParameters& params,
 | 
						|
   const QPointF& /* mouseLocalPos */,
 | 
						|
   const QPointF&   mouseGlobalPos,
 | 
						|
   const glm::vec2& mouseCoords,
 | 
						|
   const common::Coordinate& /* mouseGeoCoords */,
 | 
						|
   std::shared_ptr<types::EventHandler>& /* eventHandler */)
 | 
						|
{
 | 
						|
   std::unique_lock lock {p->lineMutex_};
 | 
						|
 | 
						|
   bool itemPicked = false;
 | 
						|
 | 
						|
   // Calculate map scale, remove width and height from original calculation
 | 
						|
   glm::vec2 scale = util::maplibre::GetMapScale(params);
 | 
						|
   scale = 2.0f / glm::vec2 {scale.x * params.width, scale.y * params.height};
 | 
						|
 | 
						|
   // Scale and rotate the identity matrix to create the map matrix
 | 
						|
   glm::mat4 mapMatrix {1.0f};
 | 
						|
   mapMatrix = glm::scale(mapMatrix, glm::vec3 {scale, 1.0f});
 | 
						|
   mapMatrix = glm::rotate(mapMatrix,
 | 
						|
                           glm::radians<float>(params.bearing),
 | 
						|
                           glm::vec3(0.0f, 0.0f, 1.0f));
 | 
						|
 | 
						|
   units::length::meters<double> mapDistance =
 | 
						|
      (p->thresholded_) ? util::maplibre::GetMapDistance(params) :
 | 
						|
                          units::length::meters<double> {0.0};
 | 
						|
 | 
						|
   // If no time has been selected, use the current time
 | 
						|
   std::chrono::system_clock::time_point selectedTime =
 | 
						|
      (p->selectedTime_ == std::chrono::system_clock::time_point {}) ?
 | 
						|
         std::chrono::system_clock::now() :
 | 
						|
         p->selectedTime_;
 | 
						|
 | 
						|
   // For each pickable line
 | 
						|
   auto it = std::find_if(
 | 
						|
      std::execution::par_unseq,
 | 
						|
      p->currentHoverLines_.crbegin(),
 | 
						|
      p->currentHoverLines_.crend(),
 | 
						|
      [&mapDistance, &selectedTime, &mapMatrix, &mouseCoords](const auto& line)
 | 
						|
      {
 | 
						|
         if ((
 | 
						|
                // Placefile is thresholded
 | 
						|
                mapDistance > units::length::meters<double> {0.0} &&
 | 
						|
 | 
						|
                // Placefile threshold is < 999 nmi
 | 
						|
                static_cast<int>(std::round(
 | 
						|
                   units::length::nautical_miles<double> {line.di_->threshold_}
 | 
						|
                      .value())) < 999 &&
 | 
						|
 | 
						|
                // Map distance is beyond/within the threshold
 | 
						|
                line.di_->threshold_ < mapDistance &&
 | 
						|
                (line.di_->threshold_.value() >= 0.0 ||
 | 
						|
                 -(line.di_->threshold_) > mapDistance)) ||
 | 
						|
 | 
						|
             (
 | 
						|
                // Line has a start time
 | 
						|
                line.di_->startTime_ !=
 | 
						|
                   std::chrono::system_clock::time_point {} &&
 | 
						|
 | 
						|
                // The time range has not yet started
 | 
						|
                (selectedTime < line.di_->startTime_ ||
 | 
						|
 | 
						|
                 // The time range has ended
 | 
						|
                 line.di_->endTime_ <= selectedTime)))
 | 
						|
         {
 | 
						|
            // Line is not pickable
 | 
						|
            return false;
 | 
						|
         }
 | 
						|
 | 
						|
         // Initialize vertices
 | 
						|
         glm::vec2 bl = line.p1_;
 | 
						|
         glm::vec2 br = bl;
 | 
						|
         glm::vec2 tl = line.p2_;
 | 
						|
         glm::vec2 tr = tl;
 | 
						|
 | 
						|
         // Calculate offsets
 | 
						|
         // - Rotated offset is half the line width (pixels) in each direction
 | 
						|
         // - Multiply the offset by the scaled and rotated map matrix
 | 
						|
         const glm::vec2 otl = mapMatrix * glm::vec4 {line.otl_, 0.0f, 1.0f};
 | 
						|
         const glm::vec2 obl = mapMatrix * glm::vec4 {line.obl_, 0.0f, 1.0f};
 | 
						|
         const glm::vec2 obr = mapMatrix * glm::vec4 {line.obr_, 0.0f, 1.0f};
 | 
						|
         const glm::vec2 otr = mapMatrix * glm::vec4 {line.otr_, 0.0f, 1.0f};
 | 
						|
 | 
						|
         // Offset vertices
 | 
						|
         tl += otl;
 | 
						|
         bl += obl;
 | 
						|
         br += obr;
 | 
						|
         tr += otr;
 | 
						|
 | 
						|
         // TODO: X/Y offsets
 | 
						|
 | 
						|
         // Test point against polygon bounds
 | 
						|
         return util::maplibre::IsPointInPolygon({tl, bl, br, tr}, mouseCoords);
 | 
						|
      });
 | 
						|
 | 
						|
   if (it != p->currentHoverLines_.crend())
 | 
						|
   {
 | 
						|
      itemPicked = true;
 | 
						|
      util::tooltip::Show(it->di_->hoverText_, mouseGlobalPos);
 | 
						|
   }
 | 
						|
 | 
						|
   return itemPicked;
 | 
						|
}
 | 
						|
 | 
						|
} // namespace draw
 | 
						|
} // namespace gl
 | 
						|
} // namespace qt
 | 
						|
} // namespace scwx
 |