3 files changed, 131 insertions, 11 deletions

diff --git a/src/libjin/Graphics/particle/je_particle.h b/src/libjin/Graphics/particle/je_particle.h
index 474e15b..cb176bb 100644
--- a/src/libjin/Graphics/particle/je_particle.h
+++ b/src/libjin/Graphics/particle/je_particle.h
@@ -10,6 +10,77 @@ namespace JinEngine
 
         class ParticleSystem;
 
+        struct LifeTimeDef
+        {
+            bool enableRandom = false;
+            union
+            {
+                struct
+                {
+                    float min, max; 
+                } random;
+                float life; 
+            } life;
+        };
+
+        struct SpeedOverTimeDef
+        {
+            bool enable = false;
+            bool enableRandom = false;
+            union
+            {
+                struct
+                {
+                    Math::Vector2<float> startFloor;
+                    Math::Vector2<float> startCeil;
+                    Math::Vector2<float> endFloor;
+                    Math::Vector2<float> endCeil;
+                } random;
+                struct
+                {
+                    Math::Vector2<float> start;
+                    Math::Vector2<float> end;
+                } speed;
+            } speed;
+        };
+
+        struct SizeOverTimeDef
+        {
+            bool enable = false;
+            bool enableRandom = false;
+            union {
+                struct {
+                    float startFloor = 1;
+                    float startCeil = 1;
+                    float endFloor = 1;
+                    float endCeil = 1;
+                } random;
+                struct {
+                    float start = 1;
+                    float end = 1;
+                } size;
+            } size;
+        };
+
+        struct ColorOverTime 
+        {
+            bool enable = false;
+            Color colorStart = Color::WHITE;
+            Color colorEnd = Color::WHITE;
+        };
+
+        ///
+        ///
+        ///
+        struct ParticleDef
+        {
+            LifeTimeDef lifeTimeDef;           ///< 
+            // Optional definitions.
+            SpeedOverTimeDef speedOverTimeDef; ///< 
+            SizeOverTimeDef sizeOverTimeDef;   ///< 
+            ColorOverTime colorOverTimeDef;    ///< 
+        };
+
         ///
         /// A single particle contains various properties of particle, such as position, accelaration, color and 
         /// other attributes changed over time.
diff --git a/src/libjin/Graphics/particle/je_particle_emitter.h b/src/libjin/Graphics/particle/je_particle_emitter.h
index 95b7875..e700f16 100644
--- a/src/libjin/Graphics/particle/je_particle_emitter.h
+++ b/src/libjin/Graphics/particle/je_particle_emitter.h
@@ -11,29 +11,75 @@ namespace JinEngine
     namespace Graphics
     {
 
+        struct PositionDef
+        {
+            bool enableRandom = false;
+            union 
+            {
+                struct 
+                {
+                    Math::Vector2<float> min;
+                    Math::Vector2<float> max;
+                } random;
+                Math::Vector2<float> position;
+            } position;
+        };
+
+        struct DirectionDef 
+        {
+            bool enableRandom = false;
+            union 
+            {
+                struct 
+                {
+                    float min = 0;
+                    float max = 0;
+                } random;
+                float direction = 0;
+            } direction;
+        };
+
+        struct EmitRateDef
+        {
+            bool enableRandom = false; 
+            union
+            {
+                struct
+                {
+                    float min = 1; 
+                    float max = 1;
+                } random;
+                float rate = 1;
+            } rate;
+        };
+
         ///
         /// Definition of particle emitter.
         ///
         struct ParticleEmitterDef : public Temporary
         {
-            Math::Vector2<float> position; 
-
+            PositionDef positionDef;   ///< Emit position(relativily to the particle system center).
+            DirectionDef directionDef; ///< Emit direction.
+            EmitRateDef emitRateDef;   ///< Emit rate.
+            ///
+            /// Particle definition.
+            ///
+            ParticleDef particleDef;   ///< Particle definition.
         };
 
+        ///
+        /// Emit a single particle.
+        ///
         class ParticleEmitter
         {
         public:
             ParticleEmitter(const ParticleEmitterDef& def);
 
             ///
-            /// Create new particle.
-            ///
-            Particle* emit();
-
-            ///
-            /// Emitter position.
+            /// Emit a particle, particle system should assign particle value to the particle in particle pool, 
+            /// but not use this return particle.
             ///
-            Math::Vector2<float> mPosition;
+            Particle emit();
 
             ///
             ///
diff --git a/src/libjin/Graphics/particle/je_particle_system.h b/src/libjin/Graphics/particle/je_particle_system.h
index c5db938..9ccb8df 100644
--- a/src/libjin/Graphics/particle/je_particle_system.h
+++ b/src/libjin/Graphics/particle/je_particle_system.h
@@ -4,6 +4,7 @@
 #include <vector>
 
 #include "../../common/je_temporary.h"
+#include "../../game/je_game_object.h"
 
 #include "../je_sprite.h"
 
@@ -21,14 +22,16 @@ namespace JinEngine
         ///
         struct ParticleSystemDef : public Temporary
         {
-            uint maxParticleCount = 1; ///< Max count of particles. 1 by default.
+            uint maxParticleCount = 1; ///< Max count of particles in pool. 1 by default.
+
+            ParticleEmitter emitterDef;
 
         };
 
         ///
         /// Particle emitter, handle all particles it emitts.
         ///
-        class ParticleSystem
+        class ParticleSystem : public Game::GameObject
         {
         public:
             ///