Line data    Source code

       1           0 : /*
       2             : 
       3             : OOPlasmaShotEntity.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 "OOPlasmaShotEntity.h"
      27             : #import "Universe.h"
      28             : #import "PlayerEntity.h"
      29             : #import "OOColor.h"
      30             : #import "OOPlasmaBurstEntity.h"
      31             : 
      32             : 
      33           0 : #define kPlasmaShotSize                         12.0f
      34           0 : #define kPlasmaShotActivationDelay      0.05f
      35             : 
      36             : 
      37             : /*      If nonzero, plasma shots fade with distance. Bits of this were in the old
      38             :         ParticleEntity code, but I think it was disabled on purpose.
      39             :         -- Ahruman 2009-09-25
      40             : */
      41           0 : #define PLASMA_ATTENUATION 0
      42             : 
      43             : 
      44             : @implementation OOPlasmaShotEntity
      45             : 
      46             : - (id) initWithPosition:(HPVector)inPosition
      47             :                            velocity:(Vector)inVelocity
      48             :                                  energy:(float)inEnergy
      49             :                            duration:(OOTimeDelta)duration
      50             :                                   color:(OOColor *)color
      51             : {
      52             :         if ((self = [super initWithDiameter:kPlasmaShotSize]))
      53             :         {
      54             :                 [self setPosition:inPosition];
      55             :                 [self setVelocity:inVelocity];
      56             :                 [self setCollisionRadius:2.0];
      57             :                 
      58             :                 [self setColor:color alpha:1.0];
      59             :                 _colorComponents[3] = 1.0f;
      60             :                 
      61             :                 [self setEnergy:inEnergy];
      62             :                 _duration = duration;
      63             :         }
      64             :         
      65             :         return self;
      66             : }
      67             : 
      68             : 
      69           0 : - (BOOL) canCollide
      70             : {
      71             :         return [UNIVERSE getTime] > [self spawnTime] + kPlasmaShotActivationDelay;
      72             : }
      73             : 
      74             : 
      75           0 : - (BOOL) checkCloseCollisionWith:(Entity *)other
      76             : {
      77             :         return ([other rootShipEntity] != [self owner]) && ![other isEffect];
      78             : }
      79             : 
      80             : 
      81           0 : - (void) update:(double)delta_t
      82             : {
      83             :         [super update:delta_t];
      84             :         
      85             :         OOTimeDelta lifeTime = [self timeElapsedSinceSpawn];
      86             :         
      87             : #if PLASMA_ATTENUATION
      88             :         float attenuation = OOClamp_0_1_f(1.0f - lifeTime / _duration);
      89             : #else
      90             :         const float attenuation = 1.0f;
      91             : #endif
      92             :         
      93             :         NSUInteger i, count = [collidingEntities count];
      94             :         for (i = 0; i < count; i++)
      95             :         {
      96             :                 Entity *e = (Entity *)[collidingEntities objectAtIndex:i];
      97             :                 if ([e rootShipEntity] != [self owner])
      98             :                 {
      99             :                         // we're going to force the weapon id to be a phantom equipment key so there is something for 
     100             :                         // the PlayerEntitySound to reference. it allow allows for the sound effects to be overridden by OXP.
     101             :                         [e takeEnergyDamage:[self energy] * attenuation
     102             :                                                    from:self
     103             :                                           becauseOf:[self owner]
     104             :                            weaponIdentifier:@"EQ_WEAPON_PLASMA_SHOT"];
     105             :                         [UNIVERSE removeEntity:self];
     106             :                         
     107             :                         // Spawn a plasma burst.
     108             :                         OOPlasmaBurstEntity *burst = [[OOPlasmaBurstEntity alloc] initWithPosition:[self position]];
     109             :                         [UNIVERSE addEntity:burst];
     110             :                         [burst release];
     111             :                 }
     112             :         }
     113             :         
     114             : #if PLASMA_ATTENUATION
     115             :         _colorComponents[3] = attenuation;
     116             : #endif
     117             :         
     118             :         if (lifeTime > _duration)  [UNIVERSE removeEntity:self];
     119             : }
     120             : 
     121             : @end