Allow spawning particles from the server, from lua

Spawn single particles or make use of ParticleSpawner for many randomly spawned particles.
Accessible in Lua using minetest.spawn_particle and minetest.add_particlespawner.
Increase Protocol Version to 17.

Conflicts:
	src/clientserver.h

1 files changed, 272 insertions, 48 deletions

diff --git a/src/particles.cpp b/src/particles.cpp
index fef21d91b..0445d7726 100644
--- a/src/particles.cpp
+++ b/src/particles.cpp
@@ -32,19 +32,34 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "clientmap.h"
 #include "mapnode.h"
 
+/*
+	Utility
+*/
+
+v3f random_v3f(v3f min, v3f max)
+{
+	return v3f( rand()/(float)RAND_MAX*(max.X-min.X)+min.X,
+			rand()/(float)RAND_MAX*(max.Y-min.Y)+min.Y,
+			rand()/(float)RAND_MAX*(max.Z-min.Z)+min.Z);
+}
+
+std::vector<Particle*> all_particles;
+std::map<u32, ParticleSpawner*> all_particlespawners;
+
 Particle::Particle(
 	IGameDef *gamedef,
 	scene::ISceneManager* smgr,
 	LocalPlayer *player,
-	s32 id,
+	ClientEnvironment &env,
 	v3f pos,
 	v3f velocity,
 	v3f acceleration,
 	float expirationtime,
 	float size,
+	bool collisiondetection,
 	AtlasPointer ap
 ):
-	scene::ISceneNode(smgr->getRootSceneNode(), smgr, id)
+	scene::ISceneNode(smgr->getRootSceneNode(), smgr)
 {
 	// Misc
 	m_gamedef = gamedef;
@@ -57,7 +72,6 @@ Particle::Particle(
 	m_material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 	m_material.setTexture(0, ap.atlas);
 	m_ap = ap;
-	m_light = 0;
 
 
 	// Particle related
@@ -68,10 +82,20 @@ Particle::Particle(
 	m_time = 0;
 	m_player = player;
 	m_size = size;
+	m_collisiondetection = collisiondetection;
 
-	// Irrlicht stuff (TODO)
-	m_collisionbox = core::aabbox3d<f32>(-size/2,-size/2,-size/2,size/2,size/2,size/2);
+	// Irrlicht stuff
+	m_collisionbox = core::aabbox3d<f32>
+			(-size/2,-size/2,-size/2,size/2,size/2,size/2);
 	this->setAutomaticCulling(scene::EAC_OFF);
+
+	// Init lighting
+	updateLight(env);
+
+	// Init model
+	updateVertices();
+
+	all_particles.push_back(this);
 }
 
 Particle::~Particle()
@@ -82,8 +106,10 @@ void Particle::OnRegisterSceneNode()
 {
 	if (IsVisible)
 	{
-		SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
-		SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
+		SceneManager->registerNodeForRendering
+				(this, scene::ESNRP_TRANSPARENT);
+		SceneManager->registerNodeForRendering
+				(this, scene::ESNRP_SOLID);
 	}
 
 	ISceneNode::OnRegisterSceneNode();
@@ -96,45 +122,45 @@ void Particle::render()
 	video::IVideoDriver* driver = SceneManager->getVideoDriver();
 	driver->setMaterial(m_material);
 	driver->setTransform(video::ETS_WORLD, AbsoluteTransformation);
-	video::SColor c(255, m_light, m_light, m_light);
-
-	video::S3DVertex vertices[4] =
-	{
-		video::S3DVertex(-m_size/2,-m_size/2,0, 0,0,0, c, m_ap.x0(), m_ap.y1()),
-		video::S3DVertex(m_size/2,-m_size/2,0, 0,0,0, c, m_ap.x1(), m_ap.y1()),
-		video::S3DVertex(m_size/2,m_size/2,0, 0,0,0, c, m_ap.x1(), m_ap.y0()),
-		video::S3DVertex(-m_size/2,m_size/2,0, 0,0,0, c ,m_ap.x0(), m_ap.y0()),
-	};
-
-	for(u16 i=0; i<4; i++)
-	{
-		vertices[i].Pos.rotateYZBy(m_player->getPitch());
-		vertices[i].Pos.rotateXZBy(m_player->getYaw());
-		m_box.addInternalPoint(vertices[i].Pos);
-		vertices[i].Pos += m_pos*BS;
-	}
 
 	u16 indices[] = {0,1,2, 2,3,0};
-	driver->drawVertexPrimitiveList(vertices, 4, indices, 2,
-			video::EVT_STANDARD, scene::EPT_TRIANGLES, video::EIT_16BIT);
+	driver->drawVertexPrimitiveList(m_vertices, 4,
+			indices, 2, video::EVT_STANDARD,
+			scene::EPT_TRIANGLES, video::EIT_16BIT);
 }
 
 void Particle::step(float dtime, ClientEnvironment &env)
 {
-	core::aabbox3d<f32> box = m_collisionbox;
-	v3f p_pos = m_pos*BS;
-	v3f p_velocity = m_velocity*BS;
-	v3f p_acceleration = m_acceleration*BS;
-	collisionMoveSimple(&env.getClientMap(), m_gamedef,
-		BS*0.5, box,
-		0, dtime,
-		p_pos, p_velocity, p_acceleration);
-	m_pos = p_pos/BS;
-	m_velocity = p_velocity/BS;
-	m_acceleration = p_acceleration/BS;
 	m_time += dtime;
+	if (m_collisiondetection)
+	{
+		core::aabbox3d<f32> box = m_collisionbox;
+		v3f p_pos = m_pos*BS;
+		v3f p_velocity = m_velocity*BS;
+		v3f p_acceleration = m_acceleration*BS;
+		collisionMoveSimple(&env.getClientMap(), m_gamedef,
+			BS*0.5, box,
+			0, dtime,
+			p_pos, p_velocity, p_acceleration);
+		m_pos = p_pos/BS;
+		m_velocity = p_velocity/BS;
+		m_acceleration = p_acceleration/BS;
+	}
+	else
+	{
+		m_velocity += m_acceleration * dtime;
+		m_pos += m_velocity * dtime;
+	}
 
 	// Update lighting
+	updateLight(env);
+
+	// Update model
+	updateVertices();
+}
+
+void Particle::updateLight(ClientEnvironment &env)
+{
 	u8 light = 0;
 	try{
 		v3s16 p = v3s16(
@@ -151,11 +177,37 @@ void Particle::step(float dtime, ClientEnvironment &env)
 	m_light = decode_light(light);
 }
 
-std::vector<Particle*> all_particles;
+void Particle::updateVertices()
+{
+	video::SColor c(255, m_light, m_light, m_light);
+	m_vertices[0] = video::S3DVertex(-m_size/2,-m_size/2,0, 0,0,0,
+			c, m_ap.x0(), m_ap.y1());
+	m_vertices[1] = video::S3DVertex(m_size/2,-m_size/2,0, 0,0,0,
+			c, m_ap.x1(), m_ap.y1());
+	m_vertices[2] = video::S3DVertex(m_size/2,m_size/2,0, 0,0,0,
+			c, m_ap.x1(), m_ap.y0());
+	m_vertices[3] = video::S3DVertex(-m_size/2,m_size/2,0, 0,0,0,
+			c ,m_ap.x0(), m_ap.y0());
+
+	for(u16 i=0; i<4; i++)
+	{
+		m_vertices[i].Pos.rotateYZBy(m_player->getPitch());
+		m_vertices[i].Pos.rotateXZBy(m_player->getYaw());
+		m_box.addInternalPoint(m_vertices[i].Pos);
+		m_vertices[i].Pos += m_pos*BS;
+	}
+}
+
+
+/*
+	Helpers
+*/
+
 
 void allparticles_step (float dtime, ClientEnvironment &env)
 {
-	for(std::vector<Particle*>::iterator i = all_particles.begin(); i != all_particles.end();)
+	for(std::vector<Particle*>::iterator i = all_particles.begin();
+			i != all_particles.end();)
 	{
 		if ((*i)->get_expired())
 		{
@@ -171,22 +223,28 @@ void allparticles_step (float dtime, ClientEnvironment &env)
 	}
 }
 
-void addDiggingParticles(IGameDef* gamedef, scene::ISceneManager* smgr, LocalPlayer *player, v3s16 pos, const TileSpec tiles[])
+void addDiggingParticles(IGameDef* gamedef, scene::ISceneManager* smgr,
+		LocalPlayer *player, ClientEnvironment &env, v3s16 pos,
+		const TileSpec tiles[])
 {
 	for (u16 j = 0; j < 32; j++) // set the amount of particles here
 	{
-		addNodeParticle(gamedef, smgr, player, pos, tiles);
+		addNodeParticle(gamedef, smgr, player, env, pos, tiles);
 	}
 }
 
-void addPunchingParticles(IGameDef* gamedef, scene::ISceneManager* smgr, LocalPlayer *player, v3s16 pos, const TileSpec tiles[])
+void addPunchingParticles(IGameDef* gamedef, scene::ISceneManager* smgr,
+		LocalPlayer *player, ClientEnvironment &env,
+		v3s16 pos, const TileSpec tiles[])
 {
-	addNodeParticle(gamedef, smgr, player, pos, tiles);
+	addNodeParticle(gamedef, smgr, player, env, pos, tiles);
 }
 
 // add a particle of a node
 // used by digging and punching particles
-void addNodeParticle(IGameDef* gamedef, scene::ISceneManager* smgr, LocalPlayer *player, v3s16 pos, const TileSpec tiles[])
+void addNodeParticle(IGameDef* gamedef, scene::ISceneManager* smgr,
+		LocalPlayer *player, ClientEnvironment &env, v3s16 pos,
+		const TileSpec tiles[])
 {
 	// Texture
 	u8 texid = myrand_range(0,5);
@@ -205,7 +263,10 @@ void addNodeParticle(IGameDef* gamedef, scene::ISceneManager* smgr, LocalPlayer
 	ap.pos.Y = ap.y0() + (y1 - ap.y0()) * ((rand()%64)/64.-texsize);
 
 	// Physics
-	v3f velocity((rand()%100/50.-1)/1.5, rand()%100/35., (rand()%100/50.-1)/1.5);
+	v3f velocity(	(rand()%100/50.-1)/1.5,
+			rand()%100/35.,
+			(rand()%100/50.-1)/1.5);
+
 	v3f acceleration(0,-9,0);
 	v3f particlepos = v3f(
 		(f32)pos.X+rand()%100/200.-0.25,
@@ -213,17 +274,180 @@ void addNodeParticle(IGameDef* gamedef, scene::ISceneManager* smgr, LocalPlayer
 		(f32)pos.Z+rand()%100/200.-0.25
 	);
 
-	Particle *particle = new Particle(
+	new Particle(
 		gamedef,
 		smgr,
 		player,
-		0,
+		env,
 		particlepos,
 		velocity,
 		acceleration,
 		rand()%100/100., // expiration time
 		visual_size,
+		true,
 		ap);
+}
 
-	all_particles.push_back(particle);
+/*
+	ParticleSpawner
+*/
+
+ParticleSpawner::ParticleSpawner(IGameDef* gamedef, scene::ISceneManager *smgr, LocalPlayer *player,
+	u16 amount, float time,
+	v3f minpos, v3f maxpos, v3f minvel, v3f maxvel, v3f minacc, v3f maxacc,
+	float minexptime, float maxexptime, float minsize, float maxsize,
+	bool collisiondetection, AtlasPointer ap, u32 id)
+{
+	m_gamedef = gamedef;
+	m_smgr = smgr;
+	m_player = player;
+	m_amount = amount;
+	m_spawntime = time;
+	m_minpos = minpos;
+	m_maxpos = maxpos;
+	m_minvel = minvel;
+	m_maxvel = maxvel;
+	m_minacc = minacc;
+	m_maxacc = maxacc;
+	m_minexptime = minexptime;
+	m_maxexptime = maxexptime;
+	m_minsize = minsize;
+	m_maxsize = maxsize;
+	m_collisiondetection = collisiondetection;
+	m_ap = ap;
+	m_time = 0;
+
+	for (u16 i = 0; i<=m_amount; i++)
+	{
+		float spawntime = (float)rand()/(float)RAND_MAX*m_spawntime;
+		m_spawntimes.push_back(spawntime);
+	}
+
+	all_particlespawners.insert(std::pair<u32, ParticleSpawner*>(id, this));
+}
+
+ParticleSpawner::~ParticleSpawner() {}
+
+void ParticleSpawner::step(float dtime, ClientEnvironment &env)
+{
+	m_time += dtime;
+
+	if (m_spawntime != 0) // Spawner exists for a predefined timespan
+	{
+		for(std::vector<float>::iterator i = m_spawntimes.begin();
+				i != m_spawntimes.end();)
+		{
+			if ((*i) <= m_time && m_amount > 0)
+			{
+				m_amount--;
+
+				v3f pos = random_v3f(m_minpos, m_maxpos);
+				v3f vel = random_v3f(m_minvel, m_maxvel);
+				v3f acc = random_v3f(m_minacc, m_maxacc);
+				float exptime = rand()/(float)RAND_MAX
+						*(m_maxexptime-m_minexptime)
+						+m_minexptime;
+				float size = rand()/(float)RAND_MAX
+						*(m_maxsize-m_minsize)
+						+m_minsize;
+
+				new Particle(
+					m_gamedef,
+					m_smgr,
+					m_player,
+					env,
+					pos,
+					vel,
+					acc,
+					exptime,
+					size,
+					m_collisiondetection,
+					m_ap);
+				m_spawntimes.erase(i);
+			}
+			else
+			{
+				i++;
+			}
+		}
+	}
+	else // Spawner exists for an infinity timespan, spawn on a per-second base
+	{
+		for (int i = 0; i <= m_amount; i++)
+		{
+			if (rand()/(float)RAND_MAX < dtime)
+			{
+				v3f pos = random_v3f(m_minpos, m_maxpos);
+				v3f vel = random_v3f(m_minvel, m_maxvel);
+				v3f acc = random_v3f(m_minacc, m_maxacc);
+				float exptime = rand()/(float)RAND_MAX
+						*(m_maxexptime-m_minexptime)
+						+m_minexptime;
+				float size = rand()/(float)RAND_MAX
+						*(m_maxsize-m_minsize)
+						+m_minsize;
+
+				new Particle(
+					m_gamedef,
+					m_smgr,
+					m_player,
+					env,
+					pos,
+					vel,
+					acc,
+					exptime,
+					size,
+					m_collisiondetection,
+					m_ap);
+			}
+		}
+	}
+}
+
+void allparticlespawners_step (float dtime, ClientEnvironment &env)
+{
+	for(std::map<u32, ParticleSpawner*>::iterator i = 
+			all_particlespawners.begin();
+			i != all_particlespawners.end();)
+	{
+		if (i->second->get_expired())
+		{
+			delete i->second;
+			all_particlespawners.erase(i++);
+		}
+		else
+		{
+			i->second->step(dtime, env);
+			i++;
+		}
+	}
+}
+
+void delete_particlespawner (u32 id)
+{
+	if (all_particlespawners.find(id) != all_particlespawners.end())
+	{
+		delete all_particlespawners.find(id)->second;
+		all_particlespawners.erase(id);
+	}
+}
+
+void clear_particles ()
+{
+	for(std::map<u32, ParticleSpawner*>::iterator i =
+			all_particlespawners.begin();
+			i != all_particlespawners.end();)
+	{
+		delete i->second;
+		all_particlespawners.erase(i++);
+	}
+
+	for(std::vector<Particle*>::iterator i =
+			all_particles.begin();
+			i != all_particles.end();)
+	{
+		(*i)->remove();
+		delete *i;
+		all_particles.erase(i);
+	}	
 }