C++RAW

#include "UnityPrefix.h"
#include "Configuration/UnityConfigure.h"
//#include "Runtime/Graphics/ParticleSystem/ParticleCollisionEvents.h"
#include "Runtime/Graphics/ParticleSystem/ParticleSystem.h"
#include "Runtime/Graphics/ParticleSystem/ParticleSystemRenderer.h"
#include "Runtime/Mono/MonoBehaviour.h"
#include "Runtime/Scripting/ScriptingUtility.h"
#include "Runtime/Filters/Mesh/LodMesh.h"
#include "Runtime/Scripting/Scripting.h"
#if ENABLE_PHYSICS
#include "Runtime/Dynamics/Collider.h"
#endif

#if UNITY_EDITOR
#include "Editor/Src/ParticleSystem/ParticleSystemEditor.h"
#endif

using namespace Unity;
using namespace std;

CSRAW
using System;
using System.Collections.Generic;

namespace UnityEngine
{

C++RAW

// The rendering mode for particle systems (Shuriken).
ENUM ParticleSystemRenderMode
	// Render particles as billboards facing the player. (Default)
	Billboard = 0,
	// Stretch particles in the direction of motion.
	Stretch = 1,
	// Render particles as billboards always facing up along the y-Axis.
	HorizontalBillboard = 2,
	// Render particles as billboards always facing the player, but not pitching along the x-Axis.
	VerticalBillboard = 3,
	
	// Render particles as meshes.
	Mesh = 4
END

// The simulation space for particle systems (Shuriken).
ENUM ParticleSystemSimulationSpace
	// Use local simulation space. (Default)
	Local = 0,
	// Use world simulation space.
	World = 1
END

// Script interface for particle systems (Shuriken).

CLASS ParticleSystem : Component

// Script interface for a Particle
STRUCT Particle
	CSRAW
	private Vector3 m_Position;
	private Vector3 m_Velocity;
	private Vector3 m_AnimatedVelocity;
	private Vector3 m_AxisOfRotation;
	private float m_Rotation;
	private float m_AngularVelocity;
	private float m_Size;
	private Color32 m_Color;
	private UInt32 m_RandomSeed;
	private float m_Lifetime;
	private float m_StartLifetime;
	private float m_EmitAccumulator0;
	private float m_EmitAccumulator1;
	
	// The position of the particle.
	CSRAW public Vector3 position { get { return m_Position; } set { m_Position = value; } }
		
	// The velocity of the particle.
	CSRAW public Vector3 velocity { get { return m_Velocity; } set { m_Velocity = value; } }

	// The lifetime of the particle.
	CSRAW public float lifetime { get { return m_Lifetime; } set { m_Lifetime = value; } }

	// The starting lifetime of the particle.
	CSRAW public float startLifetime { get { return m_StartLifetime; } set { m_StartLifetime = value; } }
	
	// The size of the particle.
	CSRAW public float size { get { return m_Size; } set { m_Size = value; } }
	
	// The rotation axis of the particle.
	CSRAW public Vector3 axisOfRotation { get { return m_AxisOfRotation; } set { m_AxisOfRotation = value; } }

	// The rotation of the particle.
	CSRAW public float rotation { get { return m_Rotation * Mathf.Rad2Deg; } set { m_Rotation = value * Mathf.Deg2Rad; } }

	// The angular velocity of the particle.
	CSRAW public float angularVelocity { get { return m_AngularVelocity * Mathf.Rad2Deg; } set { m_AngularVelocity = value * Mathf.Deg2Rad; } }

	// The color of the particle.
	CSRAW public Color32 color { get { return m_Color; } set { m_Color = value; } }	

	// The random value of the particle.
	CONDITIONAL !UNITY_FLASH
	OBSOLETE warning randomValue property is deprecated. Use randomSeed instead to control random behavior of particles.
	CSRAW public float randomValue { get { return BitConverter.ToSingle(BitConverter.GetBytes(m_RandomSeed), 0); } set { m_RandomSeed = BitConverter.ToUInt32(BitConverter.GetBytes(value), 0); } }	
	
	// The random seed of the particle.
	CSRAW public UInt32 randomSeed { get { return m_RandomSeed; } set { m_RandomSeed = value; } }	
END

CONDITIONAL ENABLE_PHYSICS
CUSTOM static internal Collider InstanceIDToCollider(int instanceID)
 { 
    return instanceID != 0 ? Scripting::ScriptingWrapperFor (PPtr<Collider> (instanceID)) : SCRIPTING_NULL;
 }

// Script interface for a Particle collision event
STRUCT CollisionEvent
	CSRAW
	private Vector3 m_Intersection;
	private Vector3 m_Normal;
	private Vector3 m_Velocity;
	private int m_ColliderInstanceID;

	CSRAW public Vector3 intersection { get { return m_Intersection; }  }
	CSRAW public Vector3 normal { get { return m_Normal; }  }
	CSRAW public Vector3 velocity { get { return m_Velocity; }  }
	CONDITIONAL ENABLE_PHYSICS
	CSRAW public Collider collider { get { return InstanceIDToCollider(m_ColliderInstanceID); } }
END

	// Start delay in seconds.
	SYNC_JOBS AUTO_PROP float startDelay GetStartDelay SetStartDelay

	// Is the particle system playing right now ?
	SYNC_JOBS AUTO_PROP bool isPlaying IsPlaying

	// Is the particle system stopped right now ?
	SYNC_JOBS AUTO_PROP bool isStopped IsStopped	
	
	// Is the particle system paused right now ?
	SYNC_JOBS AUTO_PROP bool isPaused IsPaused
	
	// Is the particle system looping?
	SYNC_JOBS AUTO_PROP bool loop GetLoop SetLoop
	
	// If set to true, the particle system will automatically start playing on startup.
	SYNC_JOBS AUTO_PROP bool playOnAwake GetPlayOnAwake SetPlayOnAwake

	// Playback position in seconds.
	SYNC_JOBS AUTO_PROP float time GetSecPosition SetSecPosition

	// The duration of the particle system in seconds (Read Only)
	SYNC_JOBS AUTO_PROP float duration GetLengthInSec

	// The playback speed of the particle system. 1 is normal playback speed.
	SYNC_JOBS AUTO_PROP float playbackSpeed GetPlaybackSpeed SetPlaybackSpeed

	// The current number of particles (Read Only).
	SYNC_JOBS AUTO_PROP int particleCount GetParticleCount

	// Safe array size for the collision event array used with GetCollisionEvents (Read Only).
	AUTO_PROP int safeCollisionEventSize GetSafeCollisionEventSize	
	
	// When set to false, the particle system will not emit particles
	SYNC_JOBS AUTO_PROP bool enableEmission GetEnableEmission SetEnableEmission
	
	// The rate of emission
	SYNC_JOBS AUTO_PROP float emissionRate GetEmissionRate SetEmissionRate
	
	// The initial speed of particles when emitted. When using curves, this values acts as a scale on the curve.
	SYNC_JOBS AUTO_PROP float startSpeed GetStartSpeed SetStartSpeed
	
	// The initial size of particles when emitted. When using curves, this values acts as a scale on the curve.
	SYNC_JOBS AUTO_PROP float startSize GetStartSize SetStartSize
	
	// The initial color of particles when emitted.
	SYNC_JOBS AUTO_PROP Color startColor GetStartColor SetStartColor
	
	// The initial rotation of particles when emitted. When using curves, this values acts as a scale on the curve.
	SYNC_JOBS AUTO_PROP float startRotation GetStartRotation SetStartRotation
	
	// The total lifetime in seconds that particles will have when emitted. When using curves, this values acts as a scale on the curve. This value is set in the particle when it is create by the particle system.
	SYNC_JOBS AUTO_PROP float startLifetime GetStartLifeTime SetStartLifeTime
	
	// Scale being applied to the gravity defined by [[Physics.gravity]].
	SYNC_JOBS AUTO_PROP float gravityModifier GetGravityModifier SetGravityModifier

	// Maximum number of particles.
	SYNC_JOBS AUTO_PROP int maxParticles GetMaxNumParticles SetMaxNumParticles
	
	// Selects the space in which to simulate particles; can be local (default) or world.
	SYNC_JOBS AUTO_PROP ParticleSystemSimulationSpace simulationSpace GetSimulationSpace SetSimulationSpace

	// Random seed used for the particle system emission. If set to 0, it will be assigned a random value on awake.
	SYNC_JOBS AUTO_PROP UInt32 randomSeed GetRandomSeed SetRandomSeed
	
	// Set the particles of this particle system. /size/ is the number of particles that is set.
	SYNC_JOBS CUSTOM void SetParticles (ParticleSystem.Particle[] particles, int size)
	{
		unsigned int actualSize = GetScriptingArraySize(particles);
		if (size < 0 || actualSize < size)
			size = actualSize;
	
		self->SetParticlesExternal (Scripting::GetScriptingArrayStart<ParticleSystemParticle>(particles), size);
	}
	
	// Get the particles of this particle system. Returns the number of particles written to the input particle array. 
	SYNC_JOBS CUSTOM int GetParticles (ParticleSystem.Particle[] particles)
	{
		int size = std::min<unsigned int>(self->GetParticleCount(), GetScriptingArraySize(particles));
		self->GetParticlesExternal (Scripting::GetScriptingArrayStart<ParticleSystemParticle>(particles), size);
		return size;
	}
	
	// Get the particle collision events recorded for this particle system. Returns the number of particles written to the input collision event array. 
	CUSTOM int GetCollisionEvents (GameObject go, ParticleSystem.CollisionEvent[] collisionEvents)
	{
		return self->GetCollisionEventsExternal (go->GetInstanceID (), Scripting::GetScriptingArrayStart<MonoParticleCollisionEvent>(collisionEvents), GetScriptingArraySize(collisionEvents));
	}

	SYNC_JOBS CUSTOM private void Internal_Simulate (float t, bool restart) { self->Simulate (t, restart); }
	SYNC_JOBS CUSTOM private void Internal_Play () { self->Play (); }
	SYNC_JOBS CUSTOM private void Internal_Stop () { self->Stop (); }
	SYNC_JOBS CUSTOM private void Internal_Pause () { self->Pause (); }
	SYNC_JOBS CUSTOM private void Internal_Clear () { self->Clear (); }
	SYNC_JOBS CUSTOM private bool Internal_IsAlive () { return self->IsAlive(); }

	// Fastforwards the particle system by simulating particles over given period of time, then pauses it.
	CSRAW public void Simulate (float t, bool withChildren = true, bool restart = true)
	{
		if (withChildren)
		{	
			ParticleSystem[] emitters = GetParticleSystems (this);
			foreach (var emitter in emitters)
				emitter.Internal_Simulate (t, restart);
		}
		else
		{
			Internal_Simulate (t, restart);
		}		
	}
	
	// Plays the particle system.
	CSRAW public void Play (bool withChildren = true)
	{
		if (withChildren)
		{	
			ParticleSystem[] emitters = GetParticleSystems (this);
			foreach (var emitter in emitters)
				emitter.Internal_Play ();
		}
		else
		{
			Internal_Play ();
		}
	}
	
	// Stops playing the particle system.
	CSRAW public void Stop (bool withChildren = true)
	{
		if (withChildren)
		{	
			ParticleSystem[] emitters = GetParticleSystems (this);
			foreach (var emitter in emitters)
				emitter.Internal_Stop ();
		}
		else
		{
			Internal_Stop ();
		}	
	}
	
	// Pauses playing the particle system.
	CSRAW public void Pause (bool withChildren = true)
	{
		if (withChildren)
		{	
			ParticleSystem[] emitters = GetParticleSystems (this);
			foreach (var emitter in emitters)
				emitter.Internal_Pause ();
		}
		else
		{
			Internal_Pause ();
		}
		
	}

	// Remove all particles in the particle system
	CSRAW public void Clear (bool withChildren = true)
	{
		if (withChildren)
		{	
			ParticleSystem[] emitters = GetParticleSystems (this);
			foreach (var emitter in emitters)
				emitter.Internal_Clear ();
		}
		else
		{
			Internal_Clear ();
		}	
	}

	// Is the particle system done emitting particles and are all particles dead?
	CSRAW public bool IsAlive (bool withChildren = true)
	{
		if (withChildren)
		{
			ParticleSystem[] emitters = GetParticleSystems (this);
			foreach (var emitter in emitters)
				if(emitter.Internal_IsAlive())
					return true;
			return false;
		}

		return this.Internal_IsAlive ();
	}
	
	// Emit /count/ particles immediately.
	SYNC_JOBS AUTO void Emit (int count);
	
	// Emit a single particle with given parameters.
	CSRAW public void Emit(Vector3 position, Vector3 velocity, float size, float lifetime, Color32 color)
	{
		ParticleSystem.Particle particle = new ParticleSystem.Particle();
		particle.position = position; 
		particle.velocity = velocity;
		particle.lifetime = lifetime; 
		particle.startLifetime = lifetime;
		particle.size = size;
		particle.rotation = 0.0f;
		particle.angularVelocity = 0.0f;
		particle.color = color;
		particle.randomSeed = 5;
		Internal_Emit(ref particle);
	}

	// Emit a single particle.
	CSRAW public void Emit(ParticleSystem.Particle particle)
	{
		Internal_Emit(ref particle);
	}	
	
	SYNC_JOBS CUSTOM private void Internal_Emit (ref ParticleSystem.Particle particle)
	{
		self->EmitParticleExternal (&particle);
	}


	// Returns a list with 'root' and all its direct children.
	CSRAW static internal ParticleSystem[] GetParticleSystems (ParticleSystem root)
	{
		if (!root)
			return null;

		List<ParticleSystem> particleSystems = new List<ParticleSystem>();
		particleSystems.Add(root);
		GetDirectParticleSystemChildrenRecursive(root.transform, particleSystems);
		return particleSystems.ToArray();
	}

	// Adds only active Particle Systems
	CSRAW static private void GetDirectParticleSystemChildrenRecursive(Transform transform, List<ParticleSystem> particleSystems)
	{
		foreach (Transform childTransform in transform)
		{
			ParticleSystem ps = childTransform.gameObject.GetComponent<ParticleSystem>();
			if (ps != null)
			{
				// Note: we do not check for if the gameobject is active (we want inactive particle systems as well due prefabs)
				particleSystems.Add (ps);
				GetDirectParticleSystemChildrenRecursive(childTransform, particleSystems);
			}
		}
	}
	
	CONDITIONAL UNITY_EDITOR
	//*undocumented
	CUSTOM internal void SetupDefaultType (int type)
	{	
		ParticleSystemEditor::SetupDefaultParticleSystemType(*self, (ParticleSystemSubType)type);
	}
END

// Renders particles on to the screen (Shuriken).
CLASS ParticleSystemRenderer : Renderer

	//  How particles are drawn.
	AUTO_PROP ParticleSystemRenderMode renderMode GetRenderMode SetRenderMode

	// How much are the particles stretched in their direction of motion.
	AUTO_PROP float lengthScale GetLengthScale SetLengthScale

	// How much are the particles strectched depending on "how fast they move"
	AUTO_PROP float velocityScale GetVelocityScale SetVelocityScale

	// How much are the particles strected depending on the [[Camera]]'s speed.
	AUTO_PROP float cameraVelocityScale GetCameraVelocityScale SetCameraVelocityScale

	// Clamp the maximum particle size.
	AUTO_PROP float maxParticleSize GetMaxParticleSize SetMaxParticleSize
	
	// Mesh used as particle instead of billboarded texture
	AUTO_PTR_PROP Mesh mesh GetMesh SetMesh

	CONDITIONAL UNITY_EDITOR
	CUSTOM_PROP internal bool editorEnabled { return self->GetEditorEnabled();} {self->SetEditorEnabled(value);} 
END

CSRAW
}