src/common/weapons/WeaponMirv.cpp

   1 ////////////////////////////////////////////////////////////////////////////////
   2 //    Scorched3D (c) 2000-2003
   3 //
   4 //    This file is part of Scorched3D.
   5 //
   6 //    Scorched3D is free software; you can redistribute it and/or modify
   7 //    it under the terms of the GNU General Public License as published by
   8 //    the Free Software Foundation; either version 2 of the License, or
   9 //    (at your option) any later version.
  10 //
  11 //    Scorched3D is distributed in the hope that it will be useful,
  12 //    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //    GNU General Public License for more details.
  15 //
  16 //    You should have received a copy of the GNU General Public License
  17 //    along with Scorched3D; if not, write to the Free Software
  18 //    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 ////////////////////////////////////////////////////////////////////////////////
  20
  21 #include <weapons/WeaponMirv.h>
  22 #include <weapons/AccessoryStore.h>
  23 #include <engine/ActionController.h>
  24 #include <common/Defines.h>
  25
  26 REGISTER_ACCESSORY_SOURCE(WeaponMirv);
  27
  28 WeaponMirv::WeaponMirv() :
  29         noWarheads_(0), hspreadDist_(0), vspreadDist_(0)
  30 {
  31
  32 }
  33
  34 WeaponMirv::~WeaponMirv()
  35 {
  36
  37 }
  38
  39 bool WeaponMirv::parseXML(AccessoryCreateContext &context, XMLNode *accessoryNode)
  40 {
  41         if (!Weapon::parseXML(context, accessoryNode)) return false;
  42
  43         // Get the accessory spread
  44         if (!accessoryNode->getNamedChild("hspreaddist", hspreadDist_))
  45                 return false;
  46         if (!accessoryNode->getNamedChild("vspreaddist", vspreadDist_))
  47                 return false;
  48
  49         // Get the next weapon
  50         XMLNode *subNode = 0;
  51         if (!accessoryNode->getNamedChild("aimedweapon", subNode)) return false;
  52
  53         // Check next weapon is correct type
  54         AccessoryPart *accessory = context.getAccessoryStore().
  55                 createAccessoryPart(context, parent_, subNode);
  56         if (!accessory || accessory->getType() != AccessoryPart::AccessoryWeapon)
  57         {
  58                 return subNode->returnError("Failed to find sub weapon, not a weapon");
  59         }
  60         aimedWeapon_ = (Weapon*) accessory;
  61
  62         // Get the accessory warheads
  63         if (!accessoryNode->getNamedChild("nowarheads", noWarheads_)) return false;
  64
  65         return true;
  66 }
  67
  68 void WeaponMirv::fireWeapon(ScorchedContext &context,
  69         WeaponFireContext &weaponContext, FixedVector &position, FixedVector &velocity)
  70 {
  71         // Add a shot that will fall where the original was aimed
  72         aimedWeapon_->fireWeapon(context, weaponContext, position, velocity);
  73
  74         RandomGenerator &random = context.getActionController().getRandom();
  75
  76         // Add all of the sub warheads that have a random spread
  77         fixed hspreadDist;
  78         for (int i=0; i<noWarheads_ - 1; i++)
  79         {
  80                 FixedVector newDiff = velocity;
  81                 newDiff[2] = 0;
  82                 // Ensure the same value is used in all parts of the calc
  83                 hspreadDist = hspreadDist_.getValue(context);
  84                 if (hspreadDist != 0)
  85                 {
  86                         FixedVector diff = newDiff;
  87                         diff[2] -= 1;
  88                         FixedVector perp = newDiff * diff;
  89
  90                         newDiff += (perp * ((random.getRandFixed() * hspreadDist) - (hspreadDist * fixed(true, 5000))));
  91                 }
  92                 newDiff[2] += (fixed(i - (noWarheads_ / 2)) /
  93                         fixed(noWarheads_ / 2)) * vspreadDist_.getValue(context);
  94
  95                 aimedWeapon_->fireWeapon(context, weaponContext, position, newDiff);
  96         }
  97 }
  98