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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef LEGACYTRACKHANDLER_H
#define LEGACYTRACKHANDLER_H
#include <array>
#include <deque>
#include <vector>
#include <string>
#include "Rendering/GL/RenderDataBufferFwd.hpp"
#include "System/float3.h"
#include "System/EventClient.h"
#include "System/UnorderedMap.hpp"
// comment out if using DecalsDrawerGL4
#define USE_DECALHANDLER_STATE
class CSolidObject;
class CUnit;
struct SolidObjectDecalDef;
namespace Shader {
struct IProgramObject;
}
class LegacyTrackHandler: public CEventClient
{
public:
LegacyTrackHandler();
~LegacyTrackHandler();
void Draw(Shader::IProgramObject* shader);
public:
//CEventClient
bool WantsEvent(const std::string& eventName) override {
return
(eventName == "SunChanged") ||
(eventName == "RenderUnitDestroyed") ||
(eventName == "UnitMoved");
}
bool GetFullRead() const override { return true; }
int GetReadAllyTeam() const override { return AllAccessTeam; }
void SunChanged() override;
void RenderUnitDestroyed(const CUnit*) override;
void UnitMoved(const CUnit* unit) override;
private:
bool GetDrawTracks() const;
void LoadDecalShaders();
void DrawObjectDecals();
static void BindTextures();
static void KillTextures();
void BindShader(const float3& ambientColor);
void AddTracks();
void DrawTracks(GL::RenderDataBufferTC* buffer, Shader::IProgramObject* shader);
void CleanTracks();
void RemoveTrack(CUnit* unit);
void AddTrack(const CUnit* unit, const float3& newPos);
void CreateOrAddTrackPart(const CUnit* unit, const SolidObjectDecalDef& decalDef, const float3& pos);
int GetTrackType(const SolidObjectDecalDef& def);
unsigned int LoadTexture(const std::string& name);
private:
struct TrackPart {
float3 pos1;
float3 pos2;
float texPos = 0.0f;
unsigned int creationTime = 0;
bool connected = false;
};
struct UnitTrack {
UnitTrack( ) = default;
UnitTrack(const UnitTrack& ut) = delete;
UnitTrack( UnitTrack&& ut) { *this = std::move(ut); }
UnitTrack& operator = (const UnitTrack& ut) = delete;
UnitTrack& operator = ( UnitTrack&& ut) {
owner = ut.owner;
ut.owner = nullptr;
id = ut.id;
lastUpdate = ut.lastUpdate;
lifeTime = ut.lifeTime;
alphaFalloff = ut.alphaFalloff;
parts = std::move(ut.parts);
return *this;
}
const CUnit* owner = nullptr;
unsigned int id = -1u;
unsigned int lastUpdate = 0;
unsigned int lifeTime = 0;
float alphaFalloff = 0.0f;
std::deque<TrackPart> parts;
};
struct TrackType {
TrackType(const std::string& s, unsigned t): name(s), texture(t) {}
std::string name;
std::vector<unsigned int> trackIDs;
unsigned int texture;
};
struct TrackToClean {
TrackToClean(unsigned int id, unsigned tti): trackID(id), ttIndex(tti) {}
unsigned int trackID;
unsigned int ttIndex;
};
enum DecalShaderProgram {
DECAL_SHADER_NULL,
DECAL_SHADER_GLSL,
DECAL_SHADER_CURR,
DECAL_SHADER_LAST
};
#ifndef USE_DECALHANDLER_STATE
std::array<Shader::IProgramObject*, DECAL_SHADER_LAST> decalShaders;
#endif
std::vector<TrackType> trackTypes;
spring::unsynced_map<int, UnitTrack> unitTracks;
std::vector<unsigned int> updatedTrackIDs;
std::vector<TrackToClean> cleanedTrackIDs;
};
#endif // LEGACYTRACKHANDLER_H
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