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<div class="title">source/logic/EnemyCar.cpp</div> </div>
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<a href="_enemy_car_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#include "<a class="code" href="_enemy_car_8h.html">EnemyCar.h</a>"</span>
<a name="l00002"></a>00002
<a name="l00003"></a><a class="code" href="class_enemy_car.html#a8af7d3c56fa9dad09992ce6fbd7389d2">00003</a> <a class="code" href="class_enemy_car.html#a8af7d3c56fa9dad09992ce6fbd7389d2" title="Creates an EnemyCar at the given coordinates.">EnemyCar::EnemyCar</a>(<span class="keywordtype">double</span> x, <span class="keywordtype">double</span> y)
<a name="l00004"></a>00004 :<a class="code" href="class_car.html" title="GameObject that moves through the maze and changes direction.">Car</a>(x,y,<a class="code" href="class_bitmap_store.html" title="Class for accessing images in ALLEGRO_BITMAP format and low level drawing.">BitmapStore</a>::ENEMY,<a class="code" href="class_maze.html" title="A rectangular 2D boolean array, representing where cars can drive and where they cannot.">Maze</a>::UP),
<a name="l00005"></a>00005 _state(CHASING),
<a name="l00006"></a>00006 _targetX(x),
<a name="l00007"></a>00007 _targetY(y)
<a name="l00008"></a>00008 {
<a name="l00009"></a>00009 }
<a name="l00010"></a>00010
<a name="l00011"></a><a class="code" href="class_enemy_car.html#a9f08f73a076e48a0bc0092e72e15e7e4">00011</a> <span class="keywordtype">void</span> <a class="code" href="class_enemy_car.html#a9f08f73a076e48a0bc0092e72e15e7e4" title="Processes one frame's worth of activity for the object, called every frame.">EnemyCar::update</a>(<span class="keyword">const</span> <a class="code" href="class_maze.html" title="A rectangular 2D boolean array, representing where cars can drive and where they cannot.">Maze</a>& maze, <span class="keyword">const</span> list<PlayerCar>& players, <span class="keyword">const</span> list<Rock>& rocks)
<a name="l00012"></a>00012 {
<a name="l00013"></a>00013 <span class="keywordflow">if</span> (!players.empty()) <a class="code" href="class_enemy_car.html#afa61cecf7df51e26edd632303c18945c" title="Updates the direction that the EnemyCar is facing, if neccesary.">checkFacing</a>(maze, players.front().x(), players.front().y(), rocks);
<a name="l00014"></a>00014
<a name="l00015"></a>00015 <span class="keywordflow">if</span> (<a class="code" href="class_enemy_car.html#a65a1c7b520f043aae27800ced9e8d543" title="The state that the object is currently in.">_state</a>!=<a class="code" href="class_enemy_car.html#afdd204c097eda1ff9232743bf216ce87af45d8b201d7334e42651b262a03d631c" title="The EnemyCar can not see, and so does not move.">BLINDED</a>)
<a name="l00016"></a>00016 {
<a name="l00017"></a>00017 <a class="code" href="class_car.html#a85e8699362bb5206e4142dbd5d20dcb9" title="Moves the car by its current speed in the direction of its facing.">move</a>(maze);
<a name="l00018"></a>00018 }
<a name="l00019"></a>00019 <span class="keywordflow">else</span>
<a name="l00020"></a>00020 {
<a name="l00021"></a>00021 <a class="code" href="class_enemy_car.html#a65a1c7b520f043aae27800ced9e8d543" title="The state that the object is currently in.">_state</a> = <a class="code" href="class_enemy_car.html#afdd204c097eda1ff9232743bf216ce87a28df0785e03156c97ddeb81da5e0770c" title="The EnemyCar tries to drive to the block that the player is currently on.">CHASING</a>;
<a name="l00022"></a>00022 <a class="code" href="class_car.html#a84b3d05e98d66f358942193ff54dee51" title="The current speed that the Car is moving at.">_speed</a> = <a class="code" href="class_car.html#a7b942584de02f8af6f571a60a1cf32ba" title="The speed that a Car moves at in normal conditions.">_baseSpeed</a>;
<a name="l00023"></a>00023 }
<a name="l00024"></a>00024 }
<a name="l00025"></a>00025
<a name="l00026"></a><a class="code" href="class_enemy_car.html#afa61cecf7df51e26edd632303c18945c">00026</a> <span class="keywordtype">void</span> <a class="code" href="class_enemy_car.html#afa61cecf7df51e26edd632303c18945c" title="Updates the direction that the EnemyCar is facing, if neccesary.">EnemyCar::checkFacing</a>(<span class="keyword">const</span> <a class="code" href="class_maze.html" title="A rectangular 2D boolean array, representing where cars can drive and where they cannot.">Maze</a>& maze, <span class="keywordtype">double</span> chasingX, <span class="keywordtype">double</span> chasingY, <span class="keyword">const</span> list<Rock>& rocks)
<a name="l00027"></a>00027 {
<a name="l00028"></a>00028 <span class="keywordflow">if</span> (abs(<a class="code" href="class_game_object.html#acc5b8970ff0036786fdd9af621bd1614" title="The x coordinate of the object's position.">_x</a> - <a class="code" href="class_enemy_car.html#aa84ac6485311c535526ea14d02d98cc9" title="The x coordinate that the EnemyCar is driving towards.">_targetX</a>)><a class="code" href="class_car.html#a84b3d05e98d66f358942193ff54dee51" title="The current speed that the Car is moving at.">_speed</a> || abs(<a class="code" href="class_game_object.html#ade9a5568d88963b86547ddcaec465b4e" title="The y coordinate of the object's position.">_y</a> - <a class="code" href="class_enemy_car.html#a61ff3751123febe8bc9ab24d0763245c" title="The y coordinate that the EnemyCar is driving towards.">_targetY</a>)><a class="code" href="class_car.html#a84b3d05e98d66f358942193ff54dee51" title="The current speed that the Car is moving at.">_speed</a>) <span class="keywordflow">return</span>;
<a name="l00029"></a>00029
<a name="l00030"></a>00030 map<Maze::Direction, pair<double, double> > adjacentBlocks;
<a name="l00031"></a>00031 pair<double, double> evaluatingTarget;
<a name="l00032"></a>00032
<a name="l00033"></a>00033 adjacentBlocks[<a class="code" href="class_maze.html#ad12c28d50f4d7457160a70a94acfe28faab1a1fe0274cd139b3c0116d8caf458c">Maze::LEFT</a>] = make_pair(<a class="code" href="class_maze_math.html#a2314f211065f4dc7cb11469770fd2f1c" title="Rounds a value to the nearest integer.">MazeMath::round</a>(<a class="code" href="class_game_object.html#acc5b8970ff0036786fdd9af621bd1614" title="The x coordinate of the object's position.">_x</a>-1), <a class="code" href="class_maze_math.html#a2314f211065f4dc7cb11469770fd2f1c" title="Rounds a value to the nearest integer.">MazeMath::round</a>(<a class="code" href="class_game_object.html#ade9a5568d88963b86547ddcaec465b4e" title="The y coordinate of the object's position.">_y</a>));
<a name="l00034"></a>00034 adjacentBlocks[<a class="code" href="class_maze.html#ad12c28d50f4d7457160a70a94acfe28fa699ae3e1d989e9b12bd200aa86e29e9d">Maze::RIGHT</a>] = make_pair(<a class="code" href="class_maze_math.html#a2314f211065f4dc7cb11469770fd2f1c" title="Rounds a value to the nearest integer.">MazeMath::round</a>(<a class="code" href="class_game_object.html#acc5b8970ff0036786fdd9af621bd1614" title="The x coordinate of the object's position.">_x</a>+1), <a class="code" href="class_maze_math.html#a2314f211065f4dc7cb11469770fd2f1c" title="Rounds a value to the nearest integer.">MazeMath::round</a>(<a class="code" href="class_game_object.html#ade9a5568d88963b86547ddcaec465b4e" title="The y coordinate of the object's position.">_y</a>));
<a name="l00035"></a>00035 adjacentBlocks[<a class="code" href="class_maze.html#ad12c28d50f4d7457160a70a94acfe28fad2e008a4b04be5e2d3559c70193920e7">Maze::UP</a>] = make_pair(<a class="code" href="class_maze_math.html#a2314f211065f4dc7cb11469770fd2f1c" title="Rounds a value to the nearest integer.">MazeMath::round</a>(<a class="code" href="class_game_object.html#acc5b8970ff0036786fdd9af621bd1614" title="The x coordinate of the object's position.">_x</a>), <a class="code" href="class_maze_math.html#a2314f211065f4dc7cb11469770fd2f1c" title="Rounds a value to the nearest integer.">MazeMath::round</a>(<a class="code" href="class_game_object.html#ade9a5568d88963b86547ddcaec465b4e" title="The y coordinate of the object's position.">_y</a>-1));
<a name="l00036"></a>00036 adjacentBlocks[<a class="code" href="class_maze.html#ad12c28d50f4d7457160a70a94acfe28fa89ab143d020541957ab5e0e9cfdd3e23">Maze::DOWN</a>] = make_pair(<a class="code" href="class_maze_math.html#a2314f211065f4dc7cb11469770fd2f1c" title="Rounds a value to the nearest integer.">MazeMath::round</a>(<a class="code" href="class_game_object.html#acc5b8970ff0036786fdd9af621bd1614" title="The x coordinate of the object's position.">_x</a>), <a class="code" href="class_maze_math.html#a2314f211065f4dc7cb11469770fd2f1c" title="Rounds a value to the nearest integer.">MazeMath::round</a>(<a class="code" href="class_game_object.html#ade9a5568d88963b86547ddcaec465b4e" title="The y coordinate of the object's position.">_y</a>+1));
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="comment">//remove adjacent blocks that would result in crashing into a rock or a wall</span>
<a name="l00039"></a>00039 <span class="keywordflow">for</span> (map<<a class="code" href="class_maze.html#ad12c28d50f4d7457160a70a94acfe28f" title="Defines the directions in which movement can happen in the maze.">Maze::Direction</a>, pair<double, double> >::iterator iter=adjacentBlocks.begin(); iter!=adjacentBlocks.end(); )
<a name="l00040"></a>00040 {
<a name="l00041"></a>00041 <span class="keywordflow">if</span> (<a class="code" href="class_enemy_car.html#af0dca9b89448557020ef02a18cffb682" title="Iterates through a list of Rocks and determines if moving to a given position would result in a colli...">rockAtLocation</a>(iter->second.first, iter->second.second, rocks) || maze.<a class="code" href="class_maze.html#a1bbdfece82c4ba90ffcf2fea52e5fef1" title="Checks if a given position contains a wall or not.">getSolid</a>(static_cast<int>(iter->second.first),static_cast<int>(iter->second.second)))
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 adjacentBlocks.erase(iter);
<a name="l00044"></a>00044 iter = adjacentBlocks.begin();
<a name="l00045"></a>00045 }
<a name="l00046"></a>00046 <span class="keywordflow">else</span>
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048 ++iter;
<a name="l00049"></a>00049 }
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keywordflow">if</span> (adjacentBlocks.empty())
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054 <a class="code" href="class_car.html#a84b3d05e98d66f358942193ff54dee51" title="The current speed that the Car is moving at.">_speed</a> = 0;
<a name="l00055"></a>00055 <span class="keywordflow">return</span>;
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057 <span class="keywordflow">else</span>
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 <a class="code" href="class_car.html#a84b3d05e98d66f358942193ff54dee51" title="The current speed that the Car is moving at.">_speed</a> = <a class="code" href="class_car.html#a7b942584de02f8af6f571a60a1cf32ba" title="The speed that a Car moves at in normal conditions.">_baseSpeed</a>;
<a name="l00060"></a>00060 }
<a name="l00061"></a>00061
<a name="l00062"></a>00062 map<Maze::Direction, pair<double, double> >::iterator reverseFacing = adjacentBlocks.find(<a class="code" href="class_maze.html#a79cf362b55c21634a93ef6b7d192b77c" title="Inverts a given direction, to give the value to face in the opposite direction.">Maze::backwards</a>(<a class="code" href="class_game_object.html#a24d36b1a64504298700a7ae7111fad5d" title="The direction in which the object is facing, up, down, left, or right.">_facing</a>));
<a name="l00063"></a>00063 <span class="keywordflow">if</span> ((reverseFacing != adjacentBlocks.end()) && (adjacentBlocks.size()>1))
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 adjacentBlocks.erase(reverseFacing);
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067
<a name="l00068"></a>00068 map<Maze::Direction, pair<double, double> >::const_iterator closestAdjacent = adjacentBlocks.begin();
<a name="l00069"></a>00069 <span class="keywordtype">double</span> closestDistance = <a class="code" href="class_maze_math.html#a5735276fb4c76f25944f2c02d622c3f6" title="Finds the straight line distance between two points on a 2D plane.">MazeMath::distance</a>(closestAdjacent->second.first, closestAdjacent->second.second, chasingX, chasingY);
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="keywordflow">for</span> (map<<a class="code" href="class_maze.html#ad12c28d50f4d7457160a70a94acfe28f" title="Defines the directions in which movement can happen in the maze.">Maze::Direction</a>, pair<double, double> >::const_iterator iter = ++adjacentBlocks.begin(); iter!=adjacentBlocks.end(); ++iter)
<a name="l00072"></a>00072 {
<a name="l00073"></a>00073 <span class="keywordtype">double</span> newDistance = <a class="code" href="class_maze_math.html#a5735276fb4c76f25944f2c02d622c3f6" title="Finds the straight line distance between two points on a 2D plane.">MazeMath::distance</a>(iter->second.first, iter->second.second, chasingX, chasingY);
<a name="l00074"></a>00074 <span class="keywordflow">if</span> (newDistance < closestDistance)
<a name="l00075"></a>00075 {
<a name="l00076"></a>00076 closestDistance = newDistance;
<a name="l00077"></a>00077 closestAdjacent = iter;
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <a class="code" href="class_enemy_car.html#aa84ac6485311c535526ea14d02d98cc9" title="The x coordinate that the EnemyCar is driving towards.">_targetX</a> = closestAdjacent->second.first;
<a name="l00082"></a>00082 <a class="code" href="class_enemy_car.html#a61ff3751123febe8bc9ab24d0763245c" title="The y coordinate that the EnemyCar is driving towards.">_targetY</a> = closestAdjacent->second.second;
<a name="l00083"></a>00083 <a class="code" href="class_game_object.html#a24d36b1a64504298700a7ae7111fad5d" title="The direction in which the object is facing, up, down, left, or right.">_facing</a> = closestAdjacent->first;
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00086"></a><a class="code" href="class_enemy_car.html#af0dca9b89448557020ef02a18cffb682">00086</a> <span class="keywordtype">bool</span> <a class="code" href="class_enemy_car.html#af0dca9b89448557020ef02a18cffb682" title="Iterates through a list of Rocks and determines if moving to a given position would result in a colli...">EnemyCar::rockAtLocation</a>(<span class="keywordtype">double</span> x, <span class="keywordtype">double</span> y, <span class="keyword">const</span> list<Rock>& rocks)
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 <span class="keywordflow">for</span> (list<Rock>::const_iterator iter = rocks.begin(); iter!=rocks.end(); ++iter)
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 <span class="keywordflow">if</span> (abs(x - iter->x())<1 && abs(y - iter->y())<1) <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094
<a name="l00095"></a><a class="code" href="class_enemy_car.html#ac5836046e802a749abb2308886b34060">00095</a> <span class="keywordtype">void</span> <a class="code" href="class_enemy_car.html#ac5836046e802a749abb2308886b34060" title="Function that is called when an EnemyCar crashes into a PlayerCar.">EnemyCar::crash</a>()
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 <a class="code" href="class_game_object.html#adc4a399cc59d5706f75748fb3846faec" title="True if the object has been marked for destruction.">_destroyed</a> = <span class="keyword">true</span>;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a><a class="code" href="class_enemy_car.html#aeb8bf92c965ab33f793b0274a02f142c">00100</a> <span class="keywordtype">void</span> <a class="code" href="class_enemy_car.html#aeb8bf92c965ab33f793b0274a02f142c" title="Function that is called when an EnemyCar drives into a Smokescreen.">EnemyCar::blind</a>()
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102 <a class="code" href="class_enemy_car.html#a65a1c7b520f043aae27800ced9e8d543" title="The state that the object is currently in.">_state</a> = <a class="code" href="class_enemy_car.html#afdd204c097eda1ff9232743bf216ce87af45d8b201d7334e42651b262a03d631c" title="The EnemyCar can not see, and so does not move.">BLINDED</a>;
<a name="l00103"></a>00103 <a class="code" href="class_car.html#a84b3d05e98d66f358942193ff54dee51" title="The current speed that the Car is moving at.">_speed</a> = 0;
<a name="l00104"></a>00104 }
</pre></div></div>
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