battle_context_unit_stats::battle_context_unit_stats(const unit &u,
const map_location& u_loc, int u_attack_num, bool attacking,
const unit &opp, const map_location& opp_loc,
const attack_type *opp_weapon, const unit_map& units) :
weapon(NULL),
attack_num(u_attack_num),
is_attacker(attacking),
is_poisoned(u.get_state(unit::STATE_POISONED)),
is_slowed(u.get_state(unit::STATE_SLOWED)),
slows(false),
drains(false),
petrifies(false),
plagues(false),
poisons(false),
backstab_pos(false),
swarm(false),
firststrike(false),
experience(u.experience()),
max_experience(u.max_experience()),
level(u.level()),
rounds(1),
hp(0),
max_hp(u.max_hitpoints()),
chance_to_hit(0),
damage(0),
slow_damage(0),
drain_percent(0),
drain_constant(0),
num_blows(0),
swarm_min(0),
swarm_max(0),
plague_type()
{
// Get the current state of the unit.
if (attack_num >= 0) {
weapon = &u.attacks()[attack_num];
}
if(u.hitpoints() < 0) {
LOG_CF << "Unit with " << u.hitpoints() << " hitpoints found, set to 0 for damage calculations\n";
hp = 0;
} else if(u.hitpoints() > u.max_hitpoints()) {
// If a unit has more hp than its maximum, the engine will fail
// with an assertion failure due to accessing the prob_matrix
// out of bounds.
hp = u.max_hitpoints();
} else {
hp = u.hitpoints();
}
// Get the weapon characteristics, if any.
if (weapon) {
weapon->set_specials_context(u_loc, opp_loc, attacking, opp_weapon);
if (opp_weapon)
opp_weapon->set_specials_context(opp_loc, u_loc, !attacking, weapon);
slows = weapon->get_special_bool("slow");
drains = !opp.get_state("undrainable") && weapon->get_special_bool("drains");
petrifies = weapon->get_special_bool("petrifies");
poisons = !opp.get_state("unpoisonable") && weapon->get_special_bool("poison") && !opp.get_state(unit::STATE_POISONED);
backstab_pos = is_attacker && backstab_check(u_loc, opp_loc, units, *resources::teams);
rounds = weapon->get_specials("berserk").highest("value", 1).first;
firststrike = weapon->get_special_bool("firststrike");
// Handle plague.
unit_ability_list plague_specials = weapon->get_specials("plague");
plagues = !opp.get_state("unplagueable") && !plague_specials.empty() &&
strcmp(opp.undead_variation().c_str(), "null") && !resources::game_map->is_village(opp_loc);
if (plagues) {
plague_type = (*plague_specials.front().first)["type"].str();
if (plague_type.empty())
plague_type = u.type().base_id();
}
// Compute chance to hit.
chance_to_hit = opp.defense_modifier(
resources::game_map->get_terrain(opp_loc)) + weapon->accuracy() -
(opp_weapon ? opp_weapon->parry() : 0);
if(chance_to_hit > 100) {
chance_to_hit = 100;
}
unit_ability_list cth_specials = weapon->get_specials("chance_to_hit");
unit_abilities::effect cth_effects(cth_specials, chance_to_hit, backstab_pos);
chance_to_hit = cth_effects.get_composite_value();
// Compute base damage done with the weapon.
int base_damage = weapon->modified_damage(backstab_pos);
// Get the damage multiplier applied to the base damage of the weapon.
int damage_multiplier = 100;
// Time of day bonus.
damage_multiplier += combat_modifier(u_loc, u.alignment(), u.is_fearless());
// Leadership bonus.
int leader_bonus = 0;
if (under_leadership(units, u_loc, &leader_bonus).valid())
damage_multiplier += leader_bonus;
// Resistance modifier.
damage_multiplier *= opp.damage_from(*weapon, !attacking, opp_loc);
// Compute both the normal and slowed damage.
damage = round_damage(base_damage, damage_multiplier, 10000);
slow_damage = round_damage(base_damage, damage_multiplier, 20000);
if (is_slowed)
damage = slow_damage;
// Compute drain amounts only if draining is possible.
if(drains) {
unit_ability_list drain_specials = weapon->get_specials("drains");
// Compute the drain percent (with 50% as the base for backward compatibility)
unit_abilities::effect drain_percent_effects(drain_specials, 50, backstab_pos);
drain_percent = drain_percent_effects.get_composite_value();
}
// Add heal_on_hit (the drain constant)
unit_ability_list heal_on_hit_specials = weapon->get_specials("heal_on_hit");
unit_abilities::effect heal_on_hit_effects(heal_on_hit_specials, 0, backstab_pos);
drain_constant += heal_on_hit_effects.get_composite_value();
drains = drain_constant || drain_percent;
// Compute the number of blows and handle swarm.
weapon->modified_attacks(backstab_pos, swarm_min, swarm_max);
swarm = swarm_min != swarm_max;
num_blows = calc_blows(hp);
}
}
battle_context_unit_stats::battle_context_unit_stats(const unit_type* u_type,
const attack_type* att_weapon, bool attacking,
const unit_type* opp_type,
const attack_type* opp_weapon,
unsigned int opp_terrain_defense,
int lawful_bonus) :
weapon(att_weapon),
attack_num(-2), // This is and stays invalid. Always use weapon, when using this constructor.
is_attacker(attacking),
is_poisoned(false),
is_slowed(false),
slows(false),
drains(false),
petrifies(false),
plagues(false),
poisons(false),
backstab_pos(false),
swarm(false),
firststrike(false),
disable(false),
experience(0),
max_experience(0),
level(0),
rounds(1),
hp(0),
max_hp(0),
chance_to_hit(0),
damage(0),
slow_damage(0),
drain_percent(0),
drain_constant(0),
num_blows(0),
swarm_min(0),
swarm_max(0),
plague_type()
{
if (!u_type || !opp_type) {
return;
}
// Get the current state of the unit.
if (u_type->hitpoints() < 0) {
hp = 0;
} else {
hp = u_type->hitpoints();
}
max_experience = u_type->experience_needed();
level = (u_type->level());
max_hp = (u_type->hitpoints());
// Get the weapon characteristics, if any.
if (weapon) {
weapon->set_specials_context(map_location::null_location(), attacking);
if (opp_weapon) {
opp_weapon->set_specials_context(map_location::null_location(), !attacking);
}
slows = weapon->get_special_bool("slow");
drains = !opp_type->musthave_status("undrainable") && weapon->get_special_bool("drains");
petrifies = weapon->get_special_bool("petrifies");
poisons = !opp_type->musthave_status("unpoisonable") && weapon->get_special_bool("poison");
rounds = weapon->get_specials("berserk").highest("value", 1).first;
firststrike = weapon->get_special_bool("firststrike");
disable = weapon->get_special_bool("disable");
unit_ability_list plague_specials = weapon->get_specials("plague");
plagues = !opp_type->musthave_status("unplagueable") && !plague_specials.empty() &&
strcmp(opp_type->undead_variation().c_str(), "null");
if (plagues) {
plague_type = (*plague_specials.front().first)["type"].str();
if (plague_type.empty()) {
plague_type = u_type->base_id();
}
}
signed int cth = 100 - opp_terrain_defense + weapon->accuracy() -
(opp_weapon ? opp_weapon->parry() : 0);
cth = std::min(100, cth);
cth = std::max(0, cth);
chance_to_hit = cth;
unit_ability_list cth_specials = weapon->get_specials("chance_to_hit");
unit_abilities::effect cth_effects(cth_specials, chance_to_hit, backstab_pos);
chance_to_hit = cth_effects.get_composite_value();
int base_damage = weapon->modified_damage(backstab_pos);
int damage_multiplier = 100;
damage_multiplier += generic_combat_modifier(lawful_bonus, u_type->alignment(),
u_type->musthave_status("fearless"));
damage_multiplier *= opp_type->resistance_against(weapon->type(), !attacking);
damage = round_damage(base_damage, damage_multiplier, 10000);
slow_damage = round_damage(base_damage, damage_multiplier, 20000);
if (drains) {
unit_ability_list drain_specials = weapon->get_specials("drains");
// Compute the drain percent (with 50% as the base for backward compatibility)
unit_abilities::effect drain_percent_effects(drain_specials, 50, backstab_pos);
drain_percent = drain_percent_effects.get_composite_value();
}
// Add heal_on_hit (the drain constant)
unit_ability_list heal_on_hit_specials = weapon->get_specials("heal_on_hit");
unit_abilities::effect heal_on_hit_effects(heal_on_hit_specials, 0, backstab_pos);
drain_constant += heal_on_hit_effects.get_composite_value();
drains = drain_constant || drain_percent;
// Compute the number of blows and handle swarm.
weapon->modified_attacks(backstab_pos, swarm_min, swarm_max);
swarm = swarm_min != swarm_max;
num_blows = calc_blows(hp);
}
}