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snake.cpp
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snake.cpp
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#include "snake.h"
Snake::Snake()
{
body[0] = Node(Point(1,2));
length = 1;
direction = EAST;
}
Snake::Snake(ifstream& file)
{
int x, y, dir;
file >> length;
if(length > CAPACITY)
{
length = CAPACITY;
}
file >> dir;
direction = Direction(dir);
for(int i = 0 ; i < length ; i++)
{
file >> x >> y;
body[i] = Node(Point(x,y));
}
}
void Snake::grow()
{
if(length < CAPACITY)
{
length++;
}
}
void Snake::move()
{
moveBody();
moveHead();
}
void Snake::moveBody()
{
for(int i = length-1 ; i > 0 ; i--)
{
body[i] = body[i-1];
}
}
void Snake::moveHead()
{
Point location = body[0].getLocation();
int x = location.getX(), y = location.getY();
switch(direction)
{
case NORTH: location.setY(y-1);
break;
case SOUTH: location.setY(y+1);
break;
case EAST: location.setX(x+1);
break;
case WEST: location.setX(x-1);
break;
}
body[0].setLocation(location);
}
void Snake::clear(Plotter p)
{
Point tail_loc = body[length-1].getLocation();
p.plot(tail_loc.getX(), tail_loc.getY(), ' ');
}
void Snake::draw(Plotter p)
{
Point head_loc = body[0].getLocation();
p.plot(head_loc.getX(), head_loc.getY(), SQUARE);
}
bool Snake::hit(int x_min, int x_max, int y_min, int y_max)
{
return hitItself() || hitWall(x_min , x_max , y_min , y_max);
}
bool Snake::hitItself()
{
bool ret = false;
Point location = body[0].getLocation();
for(int i = 1 ; i < length ; i++)
{
if(body[i].getLocation().equals(location))
{
ret = true;
}
}
return ret;
}
bool Snake::hitWall(int x_min, int x_max, int y_min, int y_max)
{
bool ret = false;
Point location = body[0].getLocation();
if(location.getX() <= x_min)
{
ret = true;
}
if(location.getX() >= x_max)
{
ret = true;
}
if(location.getY() <= y_min)
{
ret = true;
}
if(location.getY() >= y_max)
{
ret = true;
}
return ret;
}
bool Snake::hitNode(Node n)
{
bool ret = false;
for(int i = 0 ; i < length ; i++)
{
if(body[i].equals(n))
{
ret = true;
}
}
return ret;
}
int Snake::getLength()
{
return length;
}
Point Snake::getLocation()
{
return body[0].getLocation();
}
Node Snake::getHead()
{
return body[0];
}
void Snake::setDirection(Direction d)
{
if(direction % 2 != d % 2)
{
direction = d;
}
}
Direction Snake::getDirection()
{
return direction;
}