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/*
render/particlesystem.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include "render/gl.h"
#include "render/particlesystem.h"
namespace render {
ParticleSystem::ParticleSystem(const ParticleSystemScript *script, const core::Entity *entity, const model::Particles *modelclass)
{
// constructor asserts that modelclass->parent == entity->model
particlesystem_modelscale = 1.0f;
particlesystem_entity = entity;
if (modelclass) {
particlesystem_location.assign(modelclass->location());
particlesystem_axis.assign(modelclass->axis());
}
if (entity && entity->model() && entity->model()->radius()) {
particlesystem_modelscale = entity->radius() / entity->model()->radius();
particlesystem_location *= particlesystem_modelscale;
}
// add ParticleEjectors as defined by the ParticleSystemScript
for (ParticleSystemScript::Ejectors::const_iterator it = script->ejectors().begin(); it != script->ejectors().end(); ++it) {
ParticleEjector *ejector = 0;
switch ((*it)->type()) {
case ParticleEjector::Sprite:
ejector = new ParticleEjectorSprite(*(*it));
break;
case ParticleEjector::Flare:
ejector = new ParticleEjectorFlare(*(*it));
break;
case ParticleEjector::Trail:
ejector = new ParticleEjectorTrail(*(*it));
break;
case ParticleEjector::Streak:
ejector = new ParticleEjectorStreak(*(*it));
break;
default:
break;
}
if (ejector) {
// safety values
if (!ejector->interval()) {
ejector->set_interval(1000);
}
ejectors().push_back(ejector);
if (entity) {
if (ejector->entity()) {
if (ejector->entity_second()) {
for (size_t i = 0; i < 3; i++) {
ejector->get_color()[i] = (entity->color()[i] + entity->color_second()[i]) * 0.5f;
}
} else {
ejector->set_color(entity->color());
}
} else if (ejector->entity_second()) {
ejector->set_color(entity->color_second());
} else if (ejector->engine()) {
if (entity->model()) {
ejector->set_color(entity->model()->enginecolor());
}
}
}
if (modelclass) {
// modelclass overrides script parameters
if (modelclass->has_color()) {
ejector->set_color(modelclass->color());
}
if (entity) {
if (modelclass->entity()) {
if (modelclass->entity_second()) {
for (size_t i = 0; i < 3; i++) {
ejector->get_color()[i] = (entity->color()[i] + entity->color_second()[i]) * 0.5f;
}
} else {
ejector->set_color(entity->color());
}
} else if (modelclass->entity_second()) {
ejector->set_color(entity->color_second());
} else if (modelclass->engine()) {
if (entity->model()) {
ejector->set_color(entity->model()->enginecolor());
}
}
}
}
if (entity && ejector->scaled()) {
ejector->get_speed_vec() *= entity->radius();
ejector->get_tailspeed_vec() *= entity->radius();
ejector->get_radius_vec() *= entity->radius();
ejector->set_acceleration(ejector->acceleration() * entity->radius());
}
}
}
}
ParticleSystem::~ParticleSystem()
{
for (Ejectors::iterator it = ejectors().begin(); it != ejectors().end(); ++it) {
delete (*it);
(*it) = 0;
}
ejectors().clear();
}
void ParticleSystem::clear()
{
for (Ejectors::iterator it = ejectors().begin(); it != ejectors().end(); ++it) {
(*it)->clear();
}
}
void ParticleSystem::draw(const float seconds)
{
// clear particles for docked entities
if ( entity() && (entity()->type() == core::Entity::Controlable)) {
const core::EntityControlable *controlable = static_cast<const core::EntityControlable *>(entity());
if (controlable->state() == core::Entity::Docked) {
clear();
return;
}
}
math::Vector3f current_location(entity() ? entity()->location() + (entity()->axis() * location()) : location());
math::Axis current_axis(entity() ? entity()->axis() * axis() : axis());
for (Ejectors::iterator it = ejectors().begin(); it != ejectors().end(); ++it) {
ParticleEjector *ejector = (*it);
if (entity()) {
bool ejector_active = true;
if (entity()->type() == core::Entity::Controlable) {
const core::EntityControlable *controlable = static_cast<const core::EntityControlable *>(entity());
if (ejector->impulse() || ejector->thrust()) {
ejector_active = false;
switch (controlable->state()) {
case core::Entity::Impulse:
case core::Entity::ImpulseInitiate:
if (ejector->impulse() || ejector->thrust()) {
ejector_active = true;
}
break;
case core::Entity::Normal:
if (ejector->thrust()) {
if (controlable->thrust() > 0.0f) {
ejector_active = true;
}
}
break;
default:
ejector_active = false;
break;
}
}
} else if (entity()->type() == core::Entity::Dynamic) {
const core::EntityDynamic *dynamic = static_cast<const core::EntityDynamic *>(entity());
if (dynamic->state() == core::Entity::NoPower) {
ejector_active = false;
}
}
ejector->enable(ejector_active);
}
(*it)->frame(seconds, current_location, current_axis * ejector->axis());
}
}
}
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