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#include <stdio.h>
#include "AIController.h"
AIController::AIController(Player &player, Field& field, int inhibitDelay, int randomThreshold):
Controller(player), m_field(field), m_inhibitDelay(inhibitDelay), m_randomThreshold(randomThreshold)
{
m_inhibit = 0;
}
AIController::~AIController(void)
{
}
void AIController::think() {
Coordinates coord = m_player.getCoordinates();
VelocityVector velocity = m_player.getVelocity();
// assume either x or y is null
int speed = max(abs(velocity.x), abs(velocity.y));
int sgn_x = velocity.x == 0 ? 0 : (velocity.x > 0 ? 1 : -1);
int sgn_y = velocity.y == 0 ? 0 : (velocity.y > 0 ? 1 : -1);
for (int i = 1; i <= m_inhibitDelay*speed+1 ; ++i ) {
try {
if (m_field.getCell(Coordinates(coord.x+i*sgn_x, coord.y+i*sgn_y)).getState()) {
turnRandom();
}
} catch (std::out_of_range e) {
turnRandom();
}
}
if (rand() % 100 <= m_randomThreshold) turnRandom();
m_inhibit = max(0,m_inhibit-1);
}
void AIController::turnRandom() {
if (m_inhibit == 0) {
VelocityVector oldVelocity = m_player.getVelocity();
VelocityVector leftVelocity = VelocityVector(- oldVelocity.y, oldVelocity.x);
// right = -left
int sgn_x = leftVelocity.x == 0 ? 0 : (leftVelocity.x > 0 ? 1 : -1);
int sgn_y = leftVelocity.y == 0 ? 0 : (leftVelocity.y > 0 ? 1 : -1);
Coordinates coord = m_player.getCoordinates();
uint freeSpaceLeft = 1;
uint freeSpaceRight = 1;
try {
while (1) {
if (m_field.getCell(Coordinates(coord.x+freeSpaceLeft*sgn_x, coord.y+freeSpaceLeft*sgn_y)).getState()) break;
freeSpaceLeft++;
}
} catch (std::out_of_range e) {}
try {
while (1) {
if (m_field.getCell(Coordinates(coord.x-freeSpaceRight*sgn_x, coord.y-freeSpaceRight*sgn_y)).getState()) break;
freeSpaceRight++;
}
} catch (std::out_of_range e) {}
if (max(freeSpaceRight,freeSpaceLeft) > m_inhibitDelay*max(abs(leftVelocity.x),abs(leftVelocity.y))+1) {
freeSpaceLeft > freeSpaceRight ? m_player.turnLeft() : m_player.turnRight();
m_inhibit = m_inhibitDelay;
}
}
}
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