Add particles

1 files changed, 229 insertions, 0 deletions

diff --git a/src/particles.cpp b/src/particles.cpp
new file mode 100644
index 000000000..d49e33322
--- /dev/null
+++ b/src/particles.cpp
@@ -0,0 +1,229 @@
+/*
+Minetest-c55
+Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "particles.h"
+#include "constants.h"
+#include "debug.h"
+#include "main.h" // For g_profiler and g_settings
+#include "settings.h"
+#include "tile.h"
+#include "gamedef.h"
+#include "collision.h"
+#include <stdlib.h>
+#include "util/numeric.h"
+#include "light.h"
+#include "environment.h"
+#include "clientmap.h"
+#include "mapnode.h"
+
+Particle::Particle(
+	IGameDef *gamedef,
+	scene::ISceneManager* smgr,
+	LocalPlayer *player,
+	s32 id,
+	v3f pos,
+	v3f velocity,
+	v3f acceleration,
+	float expirationtime,
+	float size,
+	AtlasPointer ap
+):
+	scene::ISceneNode(smgr->getRootSceneNode(), smgr, id)
+{
+	// Misc
+	m_gamedef = gamedef;
+
+	// Texture
+	m_material.setFlag(video::EMF_LIGHTING, false);
+	m_material.setFlag(video::EMF_BACK_FACE_CULLING, false);
+	m_material.setFlag(video::EMF_BILINEAR_FILTER, false);
+	m_material.setFlag(video::EMF_FOG_ENABLE, true);
+	m_material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
+	m_material.setTexture(0, ap.atlas);
+	m_ap = ap;
+	m_light = 0;
+
+
+	// Particle related
+	m_pos = pos;
+	m_velocity = velocity;
+	m_acceleration = acceleration;
+	m_expiration = expirationtime;
+	m_time = 0;
+	m_player = player;
+	m_size = size;
+
+	// Irrlicht stuff (TODO)
+	m_collisionbox = core::aabbox3d<f32>(-size/2,-size/2,-size/2,size/2,size/2,size/2);
+	this->setAutomaticCulling(scene::EAC_OFF);
+}
+
+Particle::~Particle()
+{
+}
+
+void Particle::OnRegisterSceneNode()
+{
+	if (IsVisible)
+	{
+		SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
+		SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
+	}
+
+	ISceneNode::OnRegisterSceneNode();
+}
+
+void Particle::render()
+{
+	// TODO: Render particles in front of water and the selectionbox
+
+	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);
+}
+
+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;
+
+	// Update lighting
+	u8 light = 0;
+	try{
+		v3s16 p = v3s16(
+			floor(m_pos.X+0.5),
+			floor(m_pos.Y+0.5),
+			floor(m_pos.Z+0.5)
+		);
+		MapNode n = env.getClientMap().getNode(p);
+		light = n.getLightBlend(env.getDayNightRatio(), m_gamedef->ndef());
+	}
+	catch(InvalidPositionException &e){
+		light = blend_light(env.getDayNightRatio(), LIGHT_SUN, 0);
+	}
+	m_light = decode_light(light);
+}
+
+std::vector<Particle*> all_particles;
+
+void allparticles_step (float dtime, ClientEnvironment &env)
+{
+	for(std::vector<Particle*>::iterator i = all_particles.begin(); i != all_particles.end();)
+	{
+		if ((*i)->get_expired())
+		{
+			(*i)->remove();
+			delete *i;
+			all_particles.erase(i);
+		}
+		else
+		{
+			(*i)->step(dtime, env);
+			i++;
+		}
+	}
+}
+
+void addDiggingParticles(IGameDef* gamedef, scene::ISceneManager* smgr, LocalPlayer *player, v3s16 pos, const TileSpec tiles[])
+{
+	for (u16 j = 0; j < 32; j++) // set the amount of particles here
+	{
+		addNodeParticle(gamedef, smgr, player, pos, tiles);
+	}
+}
+
+void addPunchingParticles(IGameDef* gamedef, scene::ISceneManager* smgr, LocalPlayer *player, v3s16 pos, const TileSpec tiles[])
+{
+	addNodeParticle(gamedef, smgr, player, 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[])
+{
+	// Texture
+	u8 texid = myrand_range(0,5);
+	AtlasPointer ap = tiles[texid].texture;
+	float size = rand()%64/512.;
+	float visual_size = BS*size;
+	float texsize = size*2;
+
+	float x1 = ap.x1();
+	float y1 = ap.y1();
+
+	ap.size.X = (ap.x1() - ap.x0()) * texsize;
+	ap.size.Y = (ap.x1() - ap.x0()) * texsize;
+
+	ap.pos.X = ap.x0() + (x1 - ap.x0()) * ((rand()%64)/64.-texsize);
+	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 acceleration(0,-9,0);
+	v3f particlepos = v3f(
+		(f32)pos.X+rand()%100/200.-0.25,
+		(f32)pos.Y+rand()%100/200.-0.25,
+		(f32)pos.Z+rand()%100/200.-0.25
+	);
+
+	Particle *particle = new Particle(
+		gamedef,
+		smgr,
+		player,
+		0,
+		particlepos,
+		velocity,
+		acceleration,
+		rand()%100/100., // expiration time
+		visual_size,
+		ap);
+
+	all_particles.push_back(particle);
+}