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// Description:
// Particle type base.
//
// Copyright (C) 2001 Frank Becker
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation; either version 2 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 General Public License for more details
//
#include <Trace.hpp>
#include <ParticleType.hpp>
#include <ParticleGroup.hpp>
#include <GameState.hpp>
ParticleType::ParticleType( const string &name, bool manage):
_name( name)
{
XTRACE();
if( manage) ParticleGroup::addParticleType( this);
}
ParticleType::~ParticleType()
{
XTRACE();
}
void ParticleType::updatePrevs( ParticleInfo *p)
{
p->prevPosition = p->position;
p->prevVelocity = p->velocity;
p->prevExtra = p->extra;
p->prevColor = p->color;
}
void ParticleType::interpolate( ParticleInfo *p, ParticleInfo &pi)
{
interpolateImpl( p, pi, GameState::frameFraction);
}
void ParticleType::interpolateOther( ParticleInfo *p, ParticleInfo &pi)
{
interpolateImpl( p, pi, GameState::frameFractionOther);
}
void ParticleType::interpolateImpl( ParticleInfo *p, ParticleInfo &pi, const float &gf)
{
pi.position.x = p->prevPosition.x+ (p->position.x - p->prevPosition.x) * gf;
pi.position.y = p->prevPosition.y+ (p->position.y - p->prevPosition.y) * gf;
pi.position.z = p->prevPosition.z+ (p->position.z - p->prevPosition.z) * gf;
#if 0
//velocity and color interpolation isn't required for now.
pi.velocity.x = p->prevVelocity.x+ (p->velocity.x - p->prevVelocity.x) * gf;
pi.velocity.y = p->prevVelocity.y+ (p->velocity.y - p->prevVelocity.y) * gf;
pi.velocity.z = p->prevVelocity.z+ (p->velocity.z - p->prevVelocity.z) * gf;
#endif
pi.extra.x = p->prevExtra.x + (p->extra.x - p->prevExtra.x) * gf;
pi.extra.y = p->prevExtra.y + (p->extra.y - p->prevExtra.y) * gf;
pi.extra.z = p->prevExtra.z + (p->extra.z - p->prevExtra.z) * gf;
}
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