71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
#include "Inky.hpp"
|
|
#include "GameState.hpp"
|
|
|
|
namespace pacman {
|
|
|
|
Inky::Inky()
|
|
: Ghost(Atlas::Ghost::inky) {
|
|
pos = initialPosition();
|
|
}
|
|
|
|
double Inky::speed(const GameState &) const {
|
|
if (state == State::Eyes)
|
|
return 2;
|
|
if (state == State::Frightened)
|
|
return 0.5;
|
|
return 0.75;
|
|
}
|
|
|
|
Position Inky::target(const GameState & gameState) const {
|
|
if (state == State::Eyes)
|
|
return initialPosition();
|
|
|
|
if (isInPen())
|
|
return penDoorPosition();
|
|
|
|
if (state == State::Scatter)
|
|
return scatterTarget();
|
|
|
|
// Inky first selects a position 2 cell away from pacman in his direction.
|
|
GridPosition targetPosition = gameState.pacMan.positionInGrid();
|
|
switch (gameState.pacMan.currentDirection()) {
|
|
case Direction::LEFT:
|
|
targetPosition.x -= 2;
|
|
break;
|
|
case Direction::RIGHT:
|
|
targetPosition.x += 2;
|
|
break;
|
|
case Direction::UP:
|
|
targetPosition.y -= 2;
|
|
targetPosition.x -= 2;
|
|
break;
|
|
case Direction::DOWN:
|
|
targetPosition.y += 2;
|
|
break;
|
|
case Direction::NONE:
|
|
assert("Pacman should be moving!");
|
|
break;
|
|
}
|
|
|
|
// Then it calculates the distance between Blinky and this position
|
|
const auto & blinkyPosition = gameState.blinky.positionInGrid();
|
|
auto distanceBetweenBlinkyAndTarget = std::hypot(blinkyPosition.x - targetPosition.x, blinkyPosition.y - targetPosition.y);
|
|
|
|
// And selects a point on the line crossing blinky and this position that is at twice that distance
|
|
// away from blinky
|
|
targetPosition.x += int64_t((targetPosition.x - blinkyPosition.x) / distanceBetweenBlinkyAndTarget) * 2;
|
|
targetPosition.y += int64_t((targetPosition.y - blinkyPosition.y) / distanceBetweenBlinkyAndTarget) * 2;
|
|
|
|
return gridPositionToPosition(targetPosition);
|
|
}
|
|
|
|
Position Inky::initialPosition() const {
|
|
return { 13.5, 14 };
|
|
}
|
|
|
|
Position Inky::scatterTarget() const {
|
|
return { 27, 30 };
|
|
}
|
|
|
|
}
|