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#ifndef __JE_PARTICLE_EMITTER_H__
#define __JE_PARTICLE_EMITTER_H__
#include "../../common/temporary.h"
#include "../../math/vector2.hpp"
#include "particle.h"
namespace JinEngine
{
namespace Graphics
{
namespace Particles
{
struct PositionDef
{
bool enableRandom = false;
Struct(position,
struct
{
Math::Vector2<float> floor;
Math::Vector2<float> ceil;
} random;
Math::Vector2<float> position;
);
};
struct DirectionDef
{
bool enableRandom = false;
Struct(direction,
struct
{
float floor = 0;
float ceil = 0;
} random;
float direction = 0;
);
};
///
/// How many particles emitted per second.
///
struct EmitRateDef
{
bool enableRandom = false;
Struct(rate,
struct
{
float floor = 1;
float ceil = 1;
} random;
float rate = 1;
);
};
///
/// Initial speed of particle.
///
struct ForceDef
{
bool enableRandom = false;
Struct(force,
struct
{
float floor = 1;
float ceil = 1;
} random;
float force = 1;
);
};
///
/// Definition of particle emitter.
///
struct ParticleEmitterDef
{
EmitRateDef emitRateDef; ///< Emit rate.
PositionDef positionDef; ///< Emit position(relativily to the particle system center).
DirectionDef directionDef; ///< Emit direction.
ForceDef forceDef; ///< Emit force.
};
class ParticleSystem;
///
/// Emit a single particle.
///
class ParticleEmitter
{
public:
///
///
///
ParticleEmitter(ParticleSystem& ps);
///
///
///
void update(float dt);
private:
///
///
///
ParticleSystem& mPS;
ParticleEmitterDef& mDef;
ParticleDef& mPDef;
///
/// Emit particle according to emitter definition and particle definition, particle system should
/// assign particle value to the particle in particle pool, but not use this return particle.
///
void emit();
///
///
///
float mTime;
///
///
///
float mInterval;
};
} // namespace Particles
} // namespace Graphics
} // namespace JinEngine
#endif
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