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#include "Ghost2.h"
#include "time.h"
#include "math.h"
#include <string>
class Ghost2;
Ghost2::Ghost2(char* filename, int x, int y, int speed, AnimationFactory* af) : Ghost(filename,x,y,speed, af){
this->speed = speed;
this->startx = x;
this->starty = y;
direction = 2;
xpos = 50 + (x*SIZET);
ypos = 50 + (y*SIZET);
nextypos = ypos;
nextxpos = xpos;
// annoyingly must currently be a divisor of 30
//speed = 5;
int n; int j;
for(j=0;j<SIZEY;j++){
for(n=0; n<SIZEX;n++){
this->lev.map[n][j] = lev.map[n][j];
}
}
//printf("%c\n",this->map[1][1]);
};
//Ghost2::~Ghost2(){
// int i;
// for(i=0; i<frames.size(); i++){
// SDL_FreeSurface(frames[i]);
// }
//};
// x & y are pacman's current grid positions
void Ghost2::move(int x, int y){
if(timeleft>0) timeleft--; else effect = ' ';
if(respawntime>0){
respawntime--;
} else {
// pacman's X / Y
int pacx = (x / SIZET) - 1;
int pacy = (y / SIZET) - 1;
// ghost's X / Y
int ax = (xpos / SIZET) - 1;
int ay = (ypos / SIZET) - 1;
bool infront = false; // pac is above
bool left = false; // pac is left
// determine which direction pacman is in
switch(direction){
case 1: if(pacy < ay){
infront = true;
} else {
infront = false;
}
if(pacx < ax){
left = true;
} else {
left = false;
} break;
case 2: if(pacy < ay){
left = true;
} else {
left = false;
}
if(pacx < ax){
infront = false;
} else {
infront = true;
} break;
case 3: if(pacy < ay){
infront = false;
} else {
infront = true;
}
if(pacx < ax){
left = false;
} else {
left = true;
} break;
case 4: if(pacy < ay){
left = false;
} else {
left = true;
}
if(pacx < ax){
infront = true;
} else {
infront = false;
} break;
};
// need to ensure it keeps going forwards unless interrupted
if(nextxpos == xpos && nextypos == ypos){
// actual position matches wanted position, so
// pacman is in square, so move
int lft = 0;
int rit = 0;
int back = 0;
lft = direction - 1;
if(lft == 0) lft = 4;
rit = direction + 1;
if(rit == 5) rit = 1;
back = direction - 2;
if(back < 1) back = (0 - back) + (2 * direction);
int newdirection = 0; // test left right and set as newdirection
// temporarily. Then test if straight on. If straight on is ok,
// take 50-50 chance between straight on and a turn.
//if(testdirection(direction)==false){
// cannot go forwards, try left and right...
if(testdirection(lft) && !testdirection(rit)){
// left is ok, right is blocked
newdirection = lft;
} else if(!testdirection(lft) && testdirection(rit)){
// right is ok, left is blocked
newdirection = rit;
} else if(!testdirection(lft) && !testdirection(rit)){
// left and right are blocked
// ...go backwards
newdirection = back;
} else if(testdirection(lft) && testdirection(rit)){
// left / right both ok. pick one at random.
int rn = rand()%8;
// random between 0 and 1 inclusive
int biaseddirection = 0;
int unbiaseddirection = 0;
if(left){ biaseddirection = lft; unbiaseddirection = rit; }
if(!left){ biaseddirection = rit; unbiaseddirection = lft; }
if(rn==0){
newdirection = unbiaseddirection;
} else {
newdirection = biaseddirection;
}
}
if(!testdirection(direction)){
direction = newdirection;
} else if(testdirection(direction) && !testdirection(rit)
&& !testdirection(lft)){
// only forward and back are available, go forwards.
direction = direction;
} else {
// 50% move forwards, 50% turn
int rn = rand()%8;
int biaseddirection = 0;
int unbiaseddirection = 0;
if(infront){ biaseddirection = direction; unbiaseddirection = newdirection; }
if(!infront){ biaseddirection = newdirection; unbiaseddirection = direction; }
if(rn==0){
direction = unbiaseddirection;
} else {
direction = biaseddirection;
}
}
switch(direction){
case 1: nextypos = lev.map[ax][ay-1].t; break;
case 2: nextxpos = lev.map[ax+1][ay].l; break;
case 3: nextypos = lev.map[ax][ay+1].t; break;
case 4: nextxpos = lev.map[ax-1][ay].l; break;
};
} else if(nextxpos!=xpos){
switch(direction){
case 4: xpos = xpos - speed; break;
case 2: xpos = xpos + speed; break;
};
} else if(nextypos!=ypos){
switch(direction){
case 1: ypos = ypos - speed; break;
case 3: ypos = ypos + speed; break;
};
}
}
};
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