src/LevelLights.h

   1 /*
   2  * LevelLights.h
   3  * Daniel Nelson - 8/24/0
   4  *
   5  * Copyright (C) 2000  Daniel Nelson
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  *
  21  * Daniel Nelson - aluminumangel.org
  22  * 174 W. 18th Ave.
  23  * Columbus, OH  43210
  24  */
  25
  26 #ifndef LEVELLIGHTS_H
  27 #define LEVELLIGHTS_H
  28
  29 using namespace std;
  30
  31 #include "Game.h"
  32 #include "Displayer.h"
  33 #include "Communicator.h"
  34
  35 #define LL_NUMBER_LEVEL_LIGHTS       (GC_SAFE_HEIGHT - 1)
  36
  37 // two light sets
  38 #define LL_LOCAL_LIGHTS              (0)
  39 #define LL_OPPONENT_LIGHTS           (1)
  40
  41 // light states
  42 #define LS_RED                       (1 << 0)
  43 #define LS_BLUE                      (1 << 1)
  44 #define LS_FADE_TO_RED               (1 << 2)
  45 #define LS_FADE_TO_BLUE              (1 << 3)
  46 #define LS_IMPACT_FLASH              (1 << 4)
  47
  48 // communication buffer states
  49 #define LC_BLUE                      (1 << 0)
  50 #define LC_IMPACT                    (1 << 1)
  51 #define LC_DEATH_FLASH_MASK          (1 << (2 * LL_NUMBER_LEVEL_LIGHTS))
  52
  53 class LevelLight {
  54 public:
  55   int state;
  56   int fade_alarm;
  57   int flash_alarm;
  58 };
  59
  60 /* static */ class LevelLights {
  61 public:
  62   static void initialize (   );
  63   static void gameStart (   );
  64   static void timeStep (   );
  65
  66   static inline void levelRaise ( int top_effective_row )
  67   {
  68     top_effective_row--;
  69     if (top_effective_row >= LL_NUMBER_LEVEL_LIGHTS)
  70       top_effective_row = LL_NUMBER_LEVEL_LIGHTS - 1;
  71
  72     while (top_effective_row >= 0) {
  73       LevelLight &light = lights[LL_LOCAL_LIGHTS][top_effective_row];
  74       if (light.state & (LS_RED | LS_FADE_TO_RED)) break;
  75       setRed(light);
  76       top_effective_row--;
  77     }
  78   }
  79
  80   static inline void levelLower ( int top_effective_row )
  81   {
  82     while (top_effective_row < LL_NUMBER_LEVEL_LIGHTS) {
  83       LevelLight &light = lights[LL_LOCAL_LIGHTS][top_effective_row];
  84       if (light.state & (LS_BLUE | LS_FADE_TO_BLUE)) break;
  85       setBlue(light);
  86       top_effective_row++;
  87     }
  88   }
  89
  90   static inline void notifyImpact ( int y, int height )
  91   {
  92     if (y - 1 + height > LL_NUMBER_LEVEL_LIGHTS) {
  93       height = LL_NUMBER_LEVEL_LIGHTS - y + 1;
  94       if (height < 1) return;
  95     }
  96
  97     while (height--) {
  98       LevelLight &light = lights[LL_LOCAL_LIGHTS][y - 1 + height];
  99       Communicator::setLevelLightSendBit(LC_IMPACT << (2 * (y - 1 + height)));
 100       setFlashing(light);
 101     }
 102   }
 103
 104   static inline void notifySafeHeightViolation (   )
 105   {
 106     if (death_flash_alarm[LL_LOCAL_LIGHTS] == -1)
 107       death_flash_alarm[LL_LOCAL_LIGHTS] = DC_LEVEL_LIGHT_DEATH_FLASH_TIME;
 108   }
 109
 110   static inline void readySendBuffer (   )
 111   {
 112     for (int n = LL_NUMBER_LEVEL_LIGHTS; n--; )
 113       if (lights[LL_LOCAL_LIGHTS][n].state & (LS_BLUE | LS_FADE_TO_BLUE))
 114         Communicator::setLevelLightSendBit(LC_BLUE << (2 * n));
 115
 116     if (death_flash_alarm[LL_LOCAL_LIGHTS] != -1)
 117       Communicator::setLevelLightSendBit(LC_DEATH_FLASH_MASK);
 118   }
 119
 120   static inline void handleRecvBuffer (   )
 121   {
 122     if (Communicator::checkLevelLightRecvBit(LC_DEATH_FLASH_MASK)
 123      && death_flash_alarm[LL_OPPONENT_LIGHTS] == -1)
 124       death_flash_alarm[LL_OPPONENT_LIGHTS] = DC_LEVEL_LIGHT_DEATH_FLASH_TIME;
 125
 126     for (int n = LL_NUMBER_LEVEL_LIGHTS; n--; ) {
 127       if (lights[LL_OPPONENT_LIGHTS][n].state & (LS_RED | LS_FADE_TO_RED)) {
 128         if (Communicator::checkLevelLightRecvBit(LC_BLUE << (2 * n)))
 129           setBlue(lights[LL_OPPONENT_LIGHTS][n]);
 130       } else {
 131         if (!Communicator::checkLevelLightRecvBit(LC_BLUE << (2 * n)))
 132           setRed(lights[LL_OPPONENT_LIGHTS][n]);
 133       }
 134
 135       if (Communicator::checkLevelLightRecvBit(LC_IMPACT << (2 * n)))
 136         setFlashing(lights[LL_OPPONENT_LIGHTS][n]);
 137     }
 138   }
 139
 140   // level light n corresponds to row n + 1 in the grid
 141   static LevelLight lights[2][LL_NUMBER_LEVEL_LIGHTS];
 142
 143   static int death_flash_alarm[2];
 144
 145 private:
 146   static inline void setBlue ( LevelLight &light )
 147   {
 148     if (light.state & LS_FADE_TO_RED)
 149       light.fade_alarm = DC_LEVEL_LIGHT_FADE_TIME - light.fade_alarm;
 150     else
 151       light.fade_alarm = DC_LEVEL_LIGHT_FADE_TIME;
 152     light.state &= ~(LS_RED | LS_FADE_TO_RED);
 153     light.state |= LS_FADE_TO_BLUE;
 154   }
 155
 156   static inline void setRed ( LevelLight &light )
 157   {
 158     if (light.state & LS_FADE_TO_BLUE)
 159       light.fade_alarm = DC_LEVEL_LIGHT_FADE_TIME - light.fade_alarm;
 160     else
 161       light.fade_alarm = DC_LEVEL_LIGHT_FADE_TIME;
 162     light.state &= ~(LS_BLUE | LS_FADE_TO_BLUE);
 163     light.state |= LS_FADE_TO_RED;
 164   }
 165
 166   static inline void setFlashing ( LevelLight &light )
 167   {
 168     if (light.state & LS_IMPACT_FLASH) {
 169       // if past flash inflection point, sync flash start
 170       if (light.flash_alarm < (int) (DC_LEVEL_LIGHT_FLASH_INFLECTION
 171        * DC_LEVEL_LIGHT_IMPACT_FLASH_TIME))
 172         light.flash_alarm = (int) (DC_LEVEL_LIGHT_FLASH_INFLECTION
 173          * DC_LEVEL_LIGHT_IMPACT_FLASH_TIME)
 174          + (int) (((1.0f - DC_LEVEL_LIGHT_FLASH_INFLECTION)
 175          * DC_LEVEL_LIGHT_IMPACT_FLASH_TIME) * (1.0f
 176          - light.flash_alarm * (1.0f / (DC_LEVEL_LIGHT_FLASH_INFLECTION
 177          * DC_LEVEL_LIGHT_IMPACT_FLASH_TIME))));
 178
 179     } else {
 180       light.state |= LS_IMPACT_FLASH;
 181       light.flash_alarm = DC_LEVEL_LIGHT_IMPACT_FLASH_TIME;
 182     }
 183   }
 184 };
 185
 186 #endif