godot/scene/3d/particles.cpp

/*************************************************************************/
/*  particles.cpp                                                        */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/

#include "particles.h"
#include "scene/resources/surface_tool.h"
#include "servers/visual_server.h"

/*
static const char* _var_names[Particles::VAR_MAX]={
	"vars/lifetime",
	"vars/spread",
	"vars/gravity",
	"vars/linear_vel",
	"vars/angular_vel",
	"vars/linear_accel",
	"vars/radial_accel",
	"vars/tan_accel",
	"vars/initial_size",
	"vars/final_size",
	"vars/initial_angle",
	"vars/height",
	"vars/height_speed_scale",
};
*/
static const char *_rand_names[Particles::VAR_MAX] = {
	"rand/lifetime",
	"rand/spread",
	"rand/gravity",
	"rand/linear_vel",
	"rand/angular_vel",
	"rand/linear_accel",
	"rand/radial_accel",
	"rand/tan_accel",
	"rand/damping",
	"rand/initial_size",
	"rand/final_size",
	"rand/initial_angle",
	"rand/height",
	"rand/height_speed_scale",
};

static const Particles::Variable _var_indices[Particles::VAR_MAX] = {
	Particles::VAR_LIFETIME,
	Particles::VAR_SPREAD,
	Particles::VAR_GRAVITY,
	Particles::VAR_LINEAR_VELOCITY,
	Particles::VAR_ANGULAR_VELOCITY,
	Particles::VAR_LINEAR_ACCELERATION,
	Particles::VAR_DRAG,
	Particles::VAR_TANGENTIAL_ACCELERATION,
	Particles::VAR_DAMPING,
	Particles::VAR_INITIAL_SIZE,
	Particles::VAR_FINAL_SIZE,
	Particles::VAR_INITIAL_ANGLE,
	Particles::VAR_HEIGHT,
	Particles::VAR_HEIGHT_SPEED_SCALE,
};

AABB Particles::get_aabb() const {

	return AABB(Vector3(-1, -1, -1), Vector3(2, 2, 2));
}
DVector<Face3> Particles::get_faces(uint32_t p_usage_flags) const {

	return DVector<Face3>();
}

void Particles::set_amount(int p_amount) {

	ERR_FAIL_INDEX(p_amount, 1024);
	amount = p_amount;
	VisualServer::get_singleton()->particles_set_amount(particles, p_amount);
}
int Particles::get_amount() const {

	return amount;
}

void Particles::set_emitting(bool p_emitting) {

	emitting = p_emitting;
	VisualServer::get_singleton()->particles_set_emitting(particles, p_emitting);

	setup_timer();
}
bool Particles::is_emitting() const {

	return emitting;
}

void Particles::set_visibility_aabb(const AABB &p_aabb) {

	visibility_aabb = p_aabb;
	VisualServer::get_singleton()->particles_set_visibility_aabb(particles, p_aabb);
	update_gizmo();
}
AABB Particles::get_visibility_aabb() const {

	return visibility_aabb;
}

void Particles::set_emission_points(const DVector<Vector3> &p_points) {

	using_points = p_points.size();
	VisualServer::get_singleton()->particles_set_emission_points(particles, p_points);
}

DVector<Vector3> Particles::get_emission_points() const {

	if (!using_points)
		return DVector<Vector3>();

	return VisualServer::get_singleton()->particles_get_emission_points(particles);
}

void Particles::set_emission_half_extents(const Vector3 &p_half_extents) {

	emission_half_extents = p_half_extents;
	VisualServer::get_singleton()->particles_set_emission_half_extents(particles, p_half_extents);
}

Vector3 Particles::get_emission_half_extents() const {

	return emission_half_extents;
}

void Particles::set_emission_base_velocity(const Vector3 &p_base_velocity) {

	emission_base_velocity = p_base_velocity;
	VisualServer::get_singleton()->particles_set_emission_base_velocity(particles, p_base_velocity);
}

Vector3 Particles::get_emission_base_velocity() const {

	return emission_base_velocity;
}

void Particles::set_gravity_normal(const Vector3 &p_normal) {

	gravity_normal = p_normal;
	VisualServer::get_singleton()->particles_set_gravity_normal(particles, p_normal);
}

Vector3 Particles::get_gravity_normal() const {

	return gravity_normal;
}

void Particles::set_variable(Variable p_variable, float p_value) {

	ERR_FAIL_INDEX(p_variable, VAR_MAX);
	var[p_variable] = p_value;
	VisualServer::get_singleton()->particles_set_variable(particles, (VS::ParticleVariable)p_variable, p_value);
	if (p_variable == VAR_SPREAD)
		update_gizmo();
}

float Particles::get_variable(Variable p_variable) const {

	ERR_FAIL_INDEX_V(p_variable, VAR_MAX, -1);
	return var[p_variable];
}

void Particles::set_randomness(Variable p_variable, float p_randomness) {

	ERR_FAIL_INDEX(p_variable, VAR_MAX);
	var_random[p_variable] = p_randomness;
	VisualServer::get_singleton()->particles_set_randomness(particles, (VS::ParticleVariable)p_variable, p_randomness);
}
float Particles::get_randomness(Variable p_variable) const {

	ERR_FAIL_INDEX_V(p_variable, VAR_MAX, -1);
	return var_random[p_variable];
}

void Particles::set_color_phase_pos(int p_phase, float p_pos) {

	ERR_FAIL_INDEX(p_phase, VS::MAX_PARTICLE_COLOR_PHASES);
	color_phase[p_phase].pos = p_pos;
	VisualServer::get_singleton()->particles_set_color_phase_pos(particles, p_phase, p_pos);
}
float Particles::get_color_phase_pos(int p_phase) const {

	ERR_FAIL_INDEX_V(p_phase, VS::MAX_PARTICLE_COLOR_PHASES, -1);
	return color_phase[p_phase].pos;
}

void Particles::set_color_phase_color(int p_phase, const Color &p_color) {

	ERR_FAIL_INDEX(p_phase, VS::MAX_PARTICLE_COLOR_PHASES);
	color_phase[p_phase].color = p_color;
	VisualServer::get_singleton()->particles_set_color_phase_color(particles, p_phase, p_color);
}
Color Particles::get_color_phase_color(int p_phase) const {

	ERR_FAIL_INDEX_V(p_phase, VS::MAX_PARTICLE_COLOR_PHASES, Color());
	return color_phase[p_phase].color;
}

void Particles::set_material(const Ref<Material> &p_material) {

	material = p_material;
	if (material.is_null()) {
		VisualServer::get_singleton()->particles_set_material(particles, RID());
	} else {
		VisualServer::get_singleton()->particles_set_material(particles, material->get_rid());
	}
}

void Particles::setup_timer() {

	if (emitting && emit_timeout > 0) {

		timer->set_wait_time(emit_timeout);
		timer->start();
		timer->set_one_shot(true);
	};
};

void Particles::set_emit_timeout(float p_timeout) {

	emit_timeout = p_timeout;
	setup_timer();
};

float Particles::get_emit_timeout() const {

	return emit_timeout;
};

Ref<Material> Particles::get_material() const {

	return material;
}

void Particles::set_height_from_velocity(bool p_enable) {

	height_from_velocity = p_enable;
	VisualServer::get_singleton()->particles_set_height_from_velocity(particles, height_from_velocity);
}

bool Particles::has_height_from_velocity() const {

	return height_from_velocity;
}

void Particles::set_color_phases(int p_phases) {

	color_phase_count = p_phases;
	VisualServer::get_singleton()->particles_set_color_phases(particles, p_phases);
}

int Particles::get_color_phases() const {

	return color_phase_count;
}

bool Particles::_can_gizmo_scale() const {

	return false;
}

void Particles::set_use_local_coordinates(bool p_use) {

	local_coordinates = p_use;
	VisualServer::get_singleton()->particles_set_use_local_coordinates(particles, local_coordinates);
}

bool Particles::is_using_local_coordinates() const {

	return local_coordinates;
}

RES Particles::_get_gizmo_geometry() const {

	Ref<SurfaceTool> surface_tool(memnew(SurfaceTool));

	Ref<FixedMaterial> mat(memnew(FixedMaterial));

	mat->set_parameter(FixedMaterial::PARAM_DIFFUSE, Color(0.0, 0.6, 0.7, 0.2));
	mat->set_parameter(FixedMaterial::PARAM_EMISSION, Color(0.5, 0.7, 0.8));
	mat->set_blend_mode(Material::BLEND_MODE_ADD);
	mat->set_flag(Material::FLAG_DOUBLE_SIDED, true);
	//	mat->set_hint(Material::HINT_NO_DEPTH_DRAW,true);

	surface_tool->begin(Mesh::PRIMITIVE_TRIANGLES);
	surface_tool->set_material(mat);

	int sides = 16;
	int sections = 24;

	//	float len=1;
	float deg = Math::deg2rad(var[VAR_SPREAD] * 180);
	if (deg == 180)
		deg = 179.5;

	Vector3 to = Vector3(0, 0, -1);

	for (int j = 0; j < sections; j++) {

		Vector3 p1 = Matrix3(Vector3(1, 0, 0), deg * j / sections).xform(to);
		Vector3 p2 = Matrix3(Vector3(1, 0, 0), deg * (j + 1) / sections).xform(to);

		for (int i = 0; i < sides; i++) {

			Vector3 p1r = Matrix3(Vector3(0, 0, 1), Math_PI * 2 * float(i) / sides).xform(p1);
			Vector3 p1s = Matrix3(Vector3(0, 0, 1), Math_PI * 2 * float(i + 1) / sides).xform(p1);
			Vector3 p2s = Matrix3(Vector3(0, 0, 1), Math_PI * 2 * float(i + 1) / sides).xform(p2);
			Vector3 p2r = Matrix3(Vector3(0, 0, 1), Math_PI * 2 * float(i) / sides).xform(p2);

			surface_tool->add_normal(p1r.normalized());
			surface_tool->add_vertex(p1r);
			surface_tool->add_normal(p1s.normalized());
			surface_tool->add_vertex(p1s);
			surface_tool->add_normal(p2s.normalized());
			surface_tool->add_vertex(p2s);

			surface_tool->add_normal(p1r.normalized());
			surface_tool->add_vertex(p1r);
			surface_tool->add_normal(p2s.normalized());
			surface_tool->add_vertex(p2s);
			surface_tool->add_normal(p2r.normalized());
			surface_tool->add_vertex(p2r);

			if (j == sections - 1) {

				surface_tool->add_normal(p2r.normalized());
				surface_tool->add_vertex(p2r);
				surface_tool->add_normal(p2s.normalized());
				surface_tool->add_vertex(p2s);
				surface_tool->add_normal(Vector3(0, 0, 1));
				surface_tool->add_vertex(Vector3());
			}
		}
	}

	Ref<Mesh> mesh = surface_tool->commit();

	Ref<FixedMaterial> mat_aabb(memnew(FixedMaterial));

	mat_aabb->set_parameter(FixedMaterial::PARAM_DIFFUSE, Color(0.8, 0.8, 0.9, 0.7));
	mat_aabb->set_line_width(3);
	mat_aabb->set_flag(Material::FLAG_UNSHADED, true);

	surface_tool->begin(Mesh::PRIMITIVE_LINES);
	surface_tool->set_material(mat_aabb);

	for (int i = 0; i < 12; i++) {

		Vector3 f, t;
		visibility_aabb.get_edge(i, f, t);
		surface_tool->add_vertex(f);
		surface_tool->add_vertex(t);
	}

	return surface_tool->commit(mesh);
}

void Particles::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("set_amount", "amount"), &Particles::set_amount);
	ObjectTypeDB::bind_method(_MD("get_amount"), &Particles::get_amount);
	ObjectTypeDB::bind_method(_MD("set_emitting", "enabled"), &Particles::set_emitting);
	ObjectTypeDB::bind_method(_MD("is_emitting"), &Particles::is_emitting);
	ObjectTypeDB::bind_method(_MD("set_visibility_aabb", "aabb"), &Particles::set_visibility_aabb);
	ObjectTypeDB::bind_method(_MD("get_visibility_aabb"), &Particles::get_visibility_aabb);
	ObjectTypeDB::bind_method(_MD("set_emission_half_extents", "half_extents"), &Particles::set_emission_half_extents);
	ObjectTypeDB::bind_method(_MD("get_emission_half_extents"), &Particles::get_emission_half_extents);
	ObjectTypeDB::bind_method(_MD("set_emission_base_velocity", "base_velocity"), &Particles::set_emission_base_velocity);
	ObjectTypeDB::bind_method(_MD("get_emission_base_velocity"), &Particles::get_emission_base_velocity);
	ObjectTypeDB::bind_method(_MD("set_emission_points", "points"), &Particles::set_emission_points);
	ObjectTypeDB::bind_method(_MD("get_emission_points"), &Particles::get_emission_points);
	ObjectTypeDB::bind_method(_MD("set_gravity_normal", "normal"), &Particles::set_gravity_normal);
	ObjectTypeDB::bind_method(_MD("get_gravity_normal"), &Particles::get_gravity_normal);
	ObjectTypeDB::bind_method(_MD("set_variable", "variable", "value"), &Particles::set_variable);
	ObjectTypeDB::bind_method(_MD("get_variable", "variable"), &Particles::get_variable);
	ObjectTypeDB::bind_method(_MD("set_randomness", "variable", "randomness"), &Particles::set_randomness);
	ObjectTypeDB::bind_method(_MD("get_randomness", "variable"), &Particles::get_randomness);
	ObjectTypeDB::bind_method(_MD("set_color_phase_pos", "phase", "pos"), &Particles::set_color_phase_pos);
	ObjectTypeDB::bind_method(_MD("get_color_phase_pos", "phase"), &Particles::get_color_phase_pos);
	ObjectTypeDB::bind_method(_MD("set_color_phase_color", "phase", "color"), &Particles::set_color_phase_color);
	ObjectTypeDB::bind_method(_MD("get_color_phase_color", "phase"), &Particles::get_color_phase_color);
	ObjectTypeDB::bind_method(_MD("set_material", "material:Material"), &Particles::set_material);
	ObjectTypeDB::bind_method(_MD("get_material:Material"), &Particles::get_material);
	ObjectTypeDB::bind_method(_MD("set_emit_timeout", "timeout"), &Particles::set_emit_timeout);
	ObjectTypeDB::bind_method(_MD("get_emit_timeout"), &Particles::get_emit_timeout);
	ObjectTypeDB::bind_method(_MD("set_height_from_velocity", "enable"), &Particles::set_height_from_velocity);
	ObjectTypeDB::bind_method(_MD("has_height_from_velocity"), &Particles::has_height_from_velocity);
	ObjectTypeDB::bind_method(_MD("set_use_local_coordinates", "enable"), &Particles::set_use_local_coordinates);
	ObjectTypeDB::bind_method(_MD("is_using_local_coordinates"), &Particles::is_using_local_coordinates);

	ObjectTypeDB::bind_method(_MD("set_color_phases", "count"), &Particles::set_color_phases);
	ObjectTypeDB::bind_method(_MD("get_color_phases"), &Particles::get_color_phases);

	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "material", PROPERTY_HINT_RESOURCE_TYPE, "Material"), _SCS("set_material"), _SCS("get_material"));

	ADD_PROPERTY(PropertyInfo(Variant::INT, "amount", PROPERTY_HINT_RANGE, "1,1024,1"), _SCS("set_amount"), _SCS("get_amount"));
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "emitting"), _SCS("set_emitting"), _SCS("is_emitting"));
	ADD_PROPERTY(PropertyInfo(Variant::_AABB, "visibility"), _SCS("set_visibility_aabb"), _SCS("get_visibility_aabb"));
	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "emission_extents"), _SCS("set_emission_half_extents"), _SCS("get_emission_half_extents"));
	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "emission_base_velocity"), _SCS("set_emission_base_velocity"), _SCS("get_emission_base_velocity"));
	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3_ARRAY, "emission_points"), _SCS("set_emission_points"), _SCS("get_emission_points"));
	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "gravity_normal"), _SCS("set_gravity_normal"), _SCS("get_gravity_normal"));
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "local_coords"), _SCS("set_use_local_coordinates"), _SCS("is_using_local_coordinates"));
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "emit_timeout", PROPERTY_HINT_RANGE, "0,256,0.01"), _SCS("set_emit_timeout"), _SCS("get_emit_timeout"));

	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/lifetime", PROPERTY_HINT_RANGE, "0.1,60,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_LIFETIME);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/spread", PROPERTY_HINT_RANGE, "0,1,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_SPREAD);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/gravity", PROPERTY_HINT_RANGE, "-48,48,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_GRAVITY);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/linear_vel", PROPERTY_HINT_RANGE, "-100,100,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_LINEAR_VELOCITY);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/angular_vel", PROPERTY_HINT_RANGE, "-100,100,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_ANGULAR_VELOCITY);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/linear_accel", PROPERTY_HINT_RANGE, "-100,100,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_LINEAR_ACCELERATION);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/radial_accel", PROPERTY_HINT_RANGE, "-100,100,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_DRAG);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/tan_accel", PROPERTY_HINT_RANGE, "-100,100,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_TANGENTIAL_ACCELERATION);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/damping", PROPERTY_HINT_RANGE, "0,128,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_DAMPING);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/initial_size", PROPERTY_HINT_RANGE, "0,100,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_INITIAL_SIZE);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/final_size", PROPERTY_HINT_RANGE, "0,100,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_FINAL_SIZE);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/initial_angle", PROPERTY_HINT_RANGE, "0,1,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_INITIAL_ANGLE);
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "vars/height_from_velocity"), _SCS("set_height_from_velocity"), _SCS("has_height_from_velocity"));
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/height", PROPERTY_HINT_RANGE, "0,4096,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_HEIGHT);
	ADD_PROPERTYI(PropertyInfo(Variant::REAL, "vars/height_speed_scale", PROPERTY_HINT_RANGE, "0,4096,0.01"), _SCS("set_variable"), _SCS("get_variable"), VAR_HEIGHT_SPEED_SCALE);

	for (int i = 0; i < VAR_MAX; i++)
		ADD_PROPERTYI(PropertyInfo(Variant::REAL, _rand_names[i], PROPERTY_HINT_RANGE, "-16.0,16.0,0.01"), _SCS("set_randomness"), _SCS("get_randomness"), _var_indices[i]);

	ADD_PROPERTY(PropertyInfo(Variant::INT, "color_phases/count", PROPERTY_HINT_RANGE, "0,4,1"), _SCS("set_color_phases"), _SCS("get_color_phases"));

	for (int i = 0; i < VS::MAX_PARTICLE_COLOR_PHASES; i++) {
		String phase = "phase_" + itos(i) + "/";
		ADD_PROPERTYI(PropertyInfo(Variant::REAL, phase + "pos", PROPERTY_HINT_RANGE, "0,1,0.01"), _SCS("set_color_phase_pos"), _SCS("get_color_phase_pos"), i);
		ADD_PROPERTYI(PropertyInfo(Variant::COLOR, phase + "color"), _SCS("set_color_phase_color"), _SCS("get_color_phase_color"), i);
	}

	BIND_CONSTANT(VAR_LIFETIME);
	BIND_CONSTANT(VAR_SPREAD);
	BIND_CONSTANT(VAR_GRAVITY);
	BIND_CONSTANT(VAR_LINEAR_VELOCITY);
	BIND_CONSTANT(VAR_ANGULAR_VELOCITY);
	BIND_CONSTANT(VAR_LINEAR_ACCELERATION);
	BIND_CONSTANT(VAR_DRAG);
	BIND_CONSTANT(VAR_TANGENTIAL_ACCELERATION);
	BIND_CONSTANT(VAR_INITIAL_SIZE);
	BIND_CONSTANT(VAR_FINAL_SIZE);
	BIND_CONSTANT(VAR_INITIAL_ANGLE);
	BIND_CONSTANT(VAR_HEIGHT);
	BIND_CONSTANT(VAR_HEIGHT_SPEED_SCALE);
	BIND_CONSTANT(VAR_MAX);
}

Particles::Particles() {

	particles = VisualServer::get_singleton()->particles_create();
	timer = memnew(Timer);
	add_child(timer);
	emit_timeout = 0;

	set_amount(64);
	set_emitting(true);
	set_visibility_aabb(AABB(Vector3(-4, -4, -4), Vector3(8, 8, 8)));

	for (int i = 0; i < VAR_MAX; i++) {
		set_randomness((Variable)i, 0.0);
	}

	set_variable(VAR_LIFETIME, 5.0);
	set_variable(VAR_SPREAD, 0.2);
	set_variable(VAR_GRAVITY, 9.8);
	set_variable(VAR_LINEAR_VELOCITY, 0.2);
	set_variable(VAR_ANGULAR_VELOCITY, 0.0);
	set_variable(VAR_LINEAR_ACCELERATION, 0.0);
	set_variable(VAR_DRAG, 0.0);
	set_variable(VAR_TANGENTIAL_ACCELERATION, 0.0);
	set_variable(VAR_DAMPING, 0.0);
	set_variable(VAR_INITIAL_SIZE, 1.0);
	set_variable(VAR_FINAL_SIZE, 1.0);
	set_variable(VAR_INITIAL_ANGLE, 0.0);
	set_variable(VAR_HEIGHT, 1.0);
	set_variable(VAR_HEIGHT_SPEED_SCALE, 0.0);

	color_phase_count = 0;

	set_color_phase_pos(0, 0.0);
	set_color_phase_pos(1, 1.0);
	set_color_phase_pos(2, 1.0);
	set_color_phase_pos(3, 1.0);

	set_color_phase_color(0, Color(1, 1, 1));
	set_color_phase_color(1, Color(0, 0, 0));
	set_color_phase_color(2, Color(0, 0, 0));
	set_color_phase_color(3, Color(0, 0, 0));

	set_gravity_normal(Vector3(0, -1.0, 0));
	set_emission_half_extents(Vector3(0.1, 0.1, 0.1));

	height_from_velocity = false;

	Vector<Variant> pars;
	pars.push_back(false);
	timer->connect("timeout", this, "set_emitting", pars);
	set_base(particles);
	local_coordinates = false;
}

Particles::~Particles() {

	VisualServer::get_singleton()->free(particles);
}