// SHEEP_MAX_VELOCITY = 50;
// SHEEP_PERCENT_RULE1 = 0.1; // direction to centre of mass
// SHEEP_SAFE_DISTANCE = 100; // distance to obstacles
// SHEEP_PERCENT_RULE3 = 0.12; // direction to average velocity


// STATE ======================================================================
FLOCK_STATE_IDLE = 'FLOCK_STATE_IDLE';
FLOCK_STATE_SCARE = 'FLOCK_STATE_SCARE';
FLOCK_STATE_WALK = 'FLOCK_STATE_WALK';
FLOCK_STATE_GOAL = 'FLOCK_STATE_GOAL';
FLOCK_STATE_MODIFIERS = {
            // _centering, _avoid, _velocity, _runfromdog, _runfromwolf, softblock, effects
    FLOCK_STATE_IDLE  : [0.01, 0.25, 0.02, 0.3, 1.0, 1.0, 0.7],
    FLOCK_STATE_SCARE : [0.00, 0.50, 0.00, 0.3, 1.0, 1.0, 0.7],
    FLOCK_STATE_WALK  : [0.03, 0.50, 0.07, 0.3, 1.0, 1.0, 0.7],
    FLOCK_STATE_GOAL  : [0.01, 0.25, 0.02, 0.0, 1.0, 1.0, 0.7],
}

PREDATOR_STATE_FOLLOWTARGET = 'PREDATOR_STATE_FOLLOWTARGET';
PREDATOR_STATE_WAITING = 'PREDATOR_STATE_WAITING';
PREDATOR_STATE_FLEEING = 'PREDATOR_STATE_FLEEING';
// ============================================================================

// SHEEP ======================================================================
SHEEP_MAX_VELOCITY = 100;
SHEEP_MAX_NEIGHBORHOOD = 100;
SHEEP_MIN_SAFE_DISTANCE = 32;
SHEEP_PLACE_DISTANCE = 75; // to prefer or walk towards some point
SHEEP_DOG_DISTANCE = 75; // to prefer or walk towards some point
SHEEP_WOLF_DISTANCE = 100; // to prefer or walk towards some point

SHEEP_HARDBLOCK_REPULSION_COEFFICIENT = 5.0;       // 0.5; // from obstacles
SHEEP_HARDBLOCK_REPULSION_DISTANCE = 35.0;       // 0.5; // from obstacles
SHEEP_SOFTBLOCK_REPULSION_COEFFICIENT = 3.0;       // 0.5; // from obstacles
SHEEP_SOFTBLOCK_REPULSION_DISTANCE = 45.0;       // 0.5; // from obstacles
SHEEP_EFFECT_COEFFICIENT = 10.0;
SHEEP_CENTREOFMASS_COEFFICIENT = 1.0;       // 0.01; // from centre of mass
SHEEP_PLACE_COEFFICIENT = 1.0;       // 0.01; // forward to a place
SHEEP_DIRECTION_COEFFICIENT = 1.0;       // 0.01; // to follow herd direction
SHEEP_RUN_COEFFICIENT = 1.0;       // 0.1; // forward to a place

SHEEP_MEMORY_TIME = 3; // seconds to forget enemy or command
SHEEP_VELOCITY_DECAY = 0.99; // how much the velocity decay per miliseconds
SHEEP_ROTATION_SPEED = 10;
SHEEP_SLOW_RATE = 0.3;
SHEEP_SOUND_INTERVAL = 3;
SHEEP_SOUND_MIN_INTERVAL = 0.5;
SHEEP_SOUND_CHANCE_ON_SCARE = 0.25;
// ============================================================================

// WOLF =======================================================================
WOLF_SPAWN_COOLDOWN = 5; // seconds
WOLF_SPAWN_CHANCE = 0.2; // chage to appear wolf
WOLF_KILL_DISTANCE = 25;
WOLF_PERCEPTION_AREA = 150;
WOLF_SPEED = 150;
WOLF_FLEE_DISTANCE = 50;
WOLF_SOUND_INTERVAL = 5;
WOLF_SOUND_MIN_INTERVAL = 1;
// ============================================================================

VOLUME_MUSIC = 0.3;
VOLUME_SFX = 0.1;

TILE_EFFECTS = {
    8: [1, 0],
    9: [0, 1],
    10: [-1, 0],
    11: [0, -1]
}

TILE_MASK = [
    [-1,  -1], [0, -1], [1, -1],
    [-1,   0],          [1,  0],
    [-1,   1], [0,  1], [1,  1],
]
TILE_BLOCK_MASK_DIRECTIONS = [
    [1,  1], [0,  1], [-1,  1],
    [1,  0],          [-1,  0],
    [1, -1], [0, -1], [-1, -1],
]

LEVELS = {
    0: {
        'map': 'map_level01',
        'sheeps': 3,
    },
    1: {
        'map': 'map_level02',
        'sheeps': 5,
    },
    2: {
        'map': 'map_level03',
        'sheeps': 7,
    },
    3: {
        'map': 'map_level04',
        'sheeps': 10,
    },
    4: {
        'map': 'map_level05',
        'sheeps': 5,
    },
}