95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
#pragma once
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#include <optional>
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#include <random>
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#include <vector>
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#include <QElapsedTimer>
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#include <QOpenGLWidget>
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#include <QTimer>
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#include <QVector2D>
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#include "EventHandler.h"
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#include "BeamFiredEvent.h"
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#include "entt/entity/entity.hpp"
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#include "EntitySelectionChangedEvent.h"
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#include "Tick.h"
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#include "TickDriver.h"
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#include "VisualsConfig.h"
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class ArenaSimulation;
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class QPainter;
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class ArenaView : public QOpenGLWidget,
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public EventHandler<BeamFiredEvent>
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{
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Q_OBJECT
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public:
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ArenaView(ArenaSimulation* sim, const VisualsConfig* visuals,
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QWidget* parent = nullptr);
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~ArenaView() override;
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void setGameSpeed(double multiplier);
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double getGameSpeed() const;
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void togglePause();
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void stopRendering();
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protected:
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void paintGL() override;
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void mousePressEvent(QMouseEvent* event) override;
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void keyPressEvent(QKeyEvent* event) override;
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private slots:
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void onFrame();
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private:
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void handleEvent(std::shared_ptr<const BeamFiredEvent> event) override;
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void drawTiles(QPainter& painter);
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void drawBuildings(QPainter& painter);
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void drawStations(QPainter& painter);
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void drawDebris(QPainter& painter);
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void drawShips(QPainter& painter);
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void drawDebugSensorRanges(QPainter& painter);
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void drawDebugTargetLines(QPainter& painter);
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void drawBeams(QPainter& painter);
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float getTilePx() const;
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QPointF worldToWidget(QVector2D worldPos) const;
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QPointF tileToWidget(QPoint tile) const;
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QRectF tileRect(QPoint tile) const;
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std::optional<QVector2D> entityPosition(entt::entity entity) const;
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QVector2D widgetToWorld(QPoint widgetPt) const;
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struct ActiveBeam
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{
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BeamFiredEvent event;
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QVector2D targetOffset;
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};
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// Beam lifetime in game ticks so beams freeze with the simulation when
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// paused or slowed, instead of fading on wall-clock time (REQ-SHP-FIRING-BEAM).
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static constexpr Tick kBeamLifetimeTicks = secondsToTicks(0.3);
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ArenaSimulation* m_sim;
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const VisualsConfig* m_visuals;
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TickDriver m_tickDriver;
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QElapsedTimer m_frameTimer;
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std::mt19937 m_rng;
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double m_gameSpeedMultiplier;
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double m_prevNonZeroSpeed;
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QTimer* m_renderTimer;
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std::vector<ActiveBeam> m_activeBeams;
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bool m_finishedEmitted;
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std::optional<entt::entity> m_selectedEntity;
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bool m_debugDraw;
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};
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