Line data    Source code

       1           0 : /*
       2             : 
       3             : OOPlasmaBurstEntity.m
       4             : 
       5             : 
       6             : Oolite
       7             : Copyright (C) 2004-2013 Giles C Williams and contributors
       8             : 
       9             : This program is free software; you can redistribute it and/or
      10             : modify it under the terms of the GNU General Public License
      11             : as published by the Free Software Foundation; either version 2
      12             : of the License, or (at your option) any later version.
      13             : 
      14             : This program is distributed in the hope that it will be useful,
      15             : but WITHOUT ANY WARRANTY; without even the implied warranty of
      16             : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      17             : GNU General Public License for more details.
      18             : 
      19             : You should have received a copy of the GNU General Public License
      20             : along with this program; if not, write to the Free Software
      21             : Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
      22             : MA 02110-1301, USA.
      23             : 
      24             : */
      25             : 
      26             : #import "OOPlasmaBurstEntity.h"
      27             : #import "Universe.h"
      28             : 
      29             : 
      30           0 : #define kPlasmaBurstInitialSize         64.0f
      31           0 : #define kPlasmaBurstGrowthRate          64.0f
      32           0 : #define kPlasmaBurstDuration            2.0f
      33             : 
      34             : 
      35             : @implementation OOPlasmaBurstEntity
      36             : 
      37             : - (id) initWithPosition:(HPVector)inPosition
      38             : {
      39             :         if ((self = [super initWithDiameter:kPlasmaBurstInitialSize]))
      40             :         {
      41             :                 [self setPosition:inPosition];
      42             :                 [self setCollisionRadius:2.0];
      43             :                 
      44             :                 [self setColor:[OOColor redColor]];
      45             :         }
      46             :         
      47             :         return self;
      48             : }
      49             : 
      50             : 
      51           0 : - (void) update:(double)delta_t
      52             : {
      53             :         [super update:delta_t];
      54             :         
      55             :         OOTimeDelta lifeTime = [self timeElapsedSinceSpawn];
      56             :         float attenuation = OOClamp_0_1_f(1.0f - lifeTime / kPlasmaBurstDuration);
      57             :         
      58             :         _diameter = kPlasmaBurstInitialSize + lifeTime * kPlasmaBurstGrowthRate;
      59             :         
      60             :         _colorComponents[3] = attenuation;
      61             :         
      62             :         if (lifeTime > kPlasmaBurstDuration)  [UNIVERSE removeEntity:self];
      63             : }
      64             : 
      65             : @end