panda/src/particlesystem/baseParticle.I Source File

00001 // Filename: baseParticle.I
00002 // Created by:  charles (16Jun00)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
00008 //
00009 // All use of this software is subject to the terms of the Panda 3d
00010 // Software license.  You should have received a copy of this license
00011 // along with this source code; you will also find a current copy of
00012 // the license at http://www.panda3d.org/license.txt .
00013 //
00014 // To contact the maintainers of this program write to
00015 // panda3d@yahoogroups.com .
00016 //
00017 ////////////////////////////////////////////////////////////////////
00018 
00019 INLINE void BaseParticle::set_age(float age) {
00020   _age = age;
00021 }
00022 
00023 INLINE void BaseParticle::set_lifespan(float lifespan) {
00024   _lifespan = lifespan;
00025 }
00026 
00027 INLINE void BaseParticle::set_alive(bool alive) {
00028   _alive = alive;
00029 }
00030 
00031 INLINE float BaseParticle::get_age(void) const {
00032   return _age;
00033 }
00034 
00035 INLINE float BaseParticle::get_lifespan(void) const {
00036   return _lifespan;
00037 }
00038 
00039 INLINE bool BaseParticle::get_alive(void) const {
00040   return _alive;
00041 }
00042 
00043 INLINE float BaseParticle::get_parameterized_age(void) const {
00044   if (_lifespan <= 0) return 1.0;
00045   return _age / _lifespan;
00046 }
00047 
00048 INLINE float BaseParticle::get_parameterized_vel(void) const {
00049   if (IS_NEARLY_ZERO(get_terminal_velocity())) return 0.0;
00050   return (get_velocity().length()) / get_terminal_velocity();
00051 }