From 2e93e755a4f4631419ba0eee26660a5638a7a7c6 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Sun, 23 Nov 2008 22:13:40 +0000
Subject: particle systems

---
 src/render/particles.h | 144 +++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 122 insertions(+), 22 deletions(-)

(limited to 'src/render/particles.h')

diff --git a/src/render/particles.h b/src/render/particles.h
index 400971c..e74c3d8 100644
--- a/src/render/particles.h
+++ b/src/render/particles.h
@@ -9,64 +9,164 @@
 
 #include <deque>
 
+#include "math/axis.h"
 #include "math/color.h"
 #include "math/vector3f.h"
 #include "core/entity.h"
 
 namespace render {
 
+/* ---- class Particle --------------------------------------------- */
+
+/// one particle
 class Particle {
 public:
 	Particle(const math::Vector3f &location, float time);
-	Particle(const math::Vector3f &location, const math::Vector3f &up, const math::Vector3f &left, float time);
-
-	inline const math::Vector3f &location() const { return particle_location; }
+	Particle(const math::Vector3f &location, const math::Axis &axis, float time);
 
-	inline const math::Vector3f &up() const { return particle_up; }
+	/// location of the particle, in world coordinates
+	inline math::Vector3f &location() { return particle_location; }
 
-	inline const math::Vector3f &left() const { return particle_left; }
+	inline math::Axis &axis() { return particle_axis; }
 
 	inline const float time() const { return particle_time; }
 
 protected:
 	math::Vector3f	particle_location;
-	math::Vector3f  particle_up;
-	math::Vector3f  particle_left;
+	math::Axis  	particle_axis;
 
 	float		particle_time;
 };
 
+/* ---- class ParticleScript --------------------------------------- */
 
-class ParticleStream {
+/// class to hold particle scripts
+class ParticleScript {
 public:
-	ParticleStream(const math::Vector3f &location, const math::Color &color, float radius, size_t texture, core::EntityControlable *entity = 0, bool oriented = false);
-	~ParticleStream();
 
-	void draw();
+	enum Type {Jet=0, Trail=1, Flame=2 };
 
-	inline const size_t texture() const { return particles_texture; }
+	inline const Type type() const { return particles_type; }
 
-	inline const math::Vector3f &location() const { return particles_location; }
+	inline const std::string &label() const { return particles_label; }
 
-protected:
-	typedef std::deque<Particle *> Particles;
+	inline const std::string &texture() const { return particles_texture; }
+
+	inline const math::Color &color() const { return particles_color; }
+
+	inline float radius() const { return particles_radius; }
+
+	inline float timeout() const { return particles_timeout; }
+
+	inline float eject() const { return particles_eject; }
+
+	inline float speed() const { return particles_speed; }
+
+	inline float alpha() const { return particles_alpha; }
+
+	static ParticleScript *find(const std::string &label);
+	
+	static void init();
 
-	math::Vector3f	particles_location;
-	math::Color	particles_color;
-	size_t		particles_texture;
-	bool		particles_oriented;
+	static void clear();
+
+private:
+	ParticleScript();
+	~ParticleScript();
+
+	std::string	particles_label;
+	std::string	particles_texture;
+	Type		particles_type;
+	math::Color	particles_color;	
 	
 	float 		particles_radius;
 	float		particles_timeout;
 	float		particles_eject;
+	float 		particles_speed;
+	float		particles_alpha;
+
+	typedef std::map<std::string, ParticleScript *> Registry;
+
+	static Registry particles_registry;
+};
+
+/* ---- class ParticleSystem --------------------------------------- */
+
+/// abstract base class for a particle system attached to an entity
+class ParticleSystem {
+public:
+	ParticleSystem(ParticleScript *script, core::Entity *entity, const math::Vector3f &location);
+	virtual ~ParticleSystem();
+
+	/// index of the texture to use
+	inline const size_t texture() const { return particlesystem_texture; }
+
+	/// location of the particle system within the entity
+	inline const math::Vector3f &location() const { return particlesystem_location; }
+
+	/// axis of the particle system within the entity
+	inline const math::Axis &axis() const { return particlesystem_axis; }
 
-	float		particles_last_eject;
+	virtual void draw(float elapsed);
 
-	core::EntityControlable	*particles_entity;
+	void set_timeout(float timeout);
 
-	Particles	particles_stream;
+	void set_eject(float eject);
+
+protected:
+	core::Entity	*particlesystem_entity;
+	
+	typedef std::deque<Particle *> Stream;
+
+	inline Stream & stream() { return particlesystem_stream; }
+
+	size_t		particlesystem_texture;
+
+	math::Axis	particlesystem_axis;
+	math::Vector3f	particlesystem_location;
+	
+	float		particlesystem_last_eject;
+
+	ParticleScript	*particlesystem_script;
+
+	Stream		particlesystem_stream;
+
+	math::Vector3f  ejector_location;
+	bool		ejector_active;
+	float		now;
+	math::Color	color;
+};
+	
+/* ---- class Flame ------------------------------------------------ */
+
+/// flame style particles, like engine flames
+class Flame : public ParticleSystem
+{
 };
 
+/* ---- class Jet -------------------------------------------------- */
+
+/// jet style particles, like smoke
+class Jet : public ParticleSystem
+{
+public:
+	Jet(ParticleScript *script, core::Entity *entity, const math::Vector3f &location);
+	virtual ~Jet();
+	
+	virtual void draw(float elapsed);
+};
+
+/* ---- class Trail ------------------------------------------------ */
+
+/// trail style particles, like an engine trail
+class Trail : public ParticleSystem
+{
+public:
+	Trail(ParticleScript *script, core::Entity *entity, const math::Vector3f &location);
+	virtual ~Trail();
+
+	virtual void draw(float elapsed);
+};
 
 } // namespace render
 
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