vectozavr-shooter/weapon/Weapon.cpp

//
// Created by Иван Ильин on 01.06.2021.
//

#include <utility>
#include "Weapon.h"
#include "../engine/ResourceManager.h"
#include "../engine/utils/Log.h"
#include "../engine/animation/AColor.h"
#include "../ShooterConsts.h"

using namespace std;

Weapon::Weapon(int initialPack, int clipCapacity, double reloadTime, double fireDelay, double damage, double spreading, std::string fireSound, std::string reloadSound, ObjectNameTag weaponName, const std::string& objFileName, const Vec3D& s, const Vec3D& t, const Vec3D& r) : RigidBody(std::move(weaponName), objFileName), _initialPack(initialPack), _clipCapacity(clipCapacity), _reloadTime(reloadTime), _fireDelay(fireDelay), _damage(damage), _spreading(spreading), _fireSound(std::move(fireSound)), _reloadSound(std::move(reloadSound)) {
    _stockAmmo = _initialPack - _clipCapacity;
    _clipAmmo = _clipCapacity;

    loadObj(objFileName, s);
    setCollider(false);
    rotate(r);
    translate(t);
}

FireInformation Weapon::fire(std::function<IntersectionInformation(const Vec3D&, const Vec3D&)> rayCastFunction, const Vec3D& position, const Vec3D& direction) {
    if(_clipAmmo == 0) {
        reload();
        if(_clipAmmo == 0) {
            SoundController::playSound(SoundTag("noAmmo"), ShooterConsts::NO_AMMO_SOUND);
        }
    }

    if(_clipAmmo <= 0 || std::abs(Time::time() - _lastFireTime) < _fireDelay || std::abs(Time::time() - _lastReloadTime) < _reloadTime) {
        return FireInformation{std::map<ObjectNameTag, double>(), false};
    }

    _lastFireTime = Time::time();
    _clipAmmo--;

    if(_clipAmmo == 0) {
        reload();
    }

    SoundController::playSound(SoundTag("fire"), _fireSound);
    Log::log("Weapon::fire (" + std::to_string(_stockAmmo) + " : " + std::to_string(_clipAmmo) + ")");

    return FireInformation{processFire(std::move(rayCastFunction), position, direction), true};
}

void Weapon::reload() {
    if (_stockAmmo == 0 || std::abs(Time::time() - _lastReloadTime) < _reloadTime) {
        return;
    }
    if(_clipCapacity - _clipAmmo <= _stockAmmo) {
        _stockAmmo -= _clipCapacity - _clipAmmo;
        _clipAmmo = _clipCapacity;
    } else {
        _clipAmmo += _stockAmmo;
        _stockAmmo = 0;
    }

    SoundController::playSound(SoundTag("reload"), _reloadSound);
    Log::log("Weapon::reload (" + std::to_string(_stockAmmo) + " : " + std::to_string(_clipAmmo) + ")");
    _lastReloadTime = Time::time();
}

std::map<ObjectNameTag, double> Weapon::processFire(std::function<IntersectionInformation(const Vec3D&, const Vec3D&)> rayCastFunction, const Vec3D& position, const Vec3D& direction) {
    return addTrace(std::move(rayCastFunction), position, direction);
}

std::map<ObjectNameTag, double> Weapon::addTrace(std::function<IntersectionInformation(const Vec3D&, const Vec3D&)> rayCastFunction, const Vec3D& from, const Vec3D& directionTo) {
    std::map<ObjectNameTag, double> damagedPlayers;

    double spreading = _spreading*ShooterConsts::FIRE_DISTANCE/100;

    //generate random vector
    Vec3D randV(spreading*(1.0 - 2.0*(double)rand()/RAND_MAX), spreading*(1.0 - 2.0*(double)rand()/RAND_MAX), spreading*(1.0 - 2.0*(double)rand()/RAND_MAX));

    // damage player
    auto rayCast = rayCastFunction(from, from + directionTo * ShooterConsts::FIRE_DISTANCE + randV);
    if(rayCast.objectName.str().find("Enemy") != std::string::npos) {
        damagedPlayers[rayCast.objectName] += _damage / (1.0 + rayCast.distanceToObject);
    }

    // add trace line
    Vec3D lineFrom = position() + model()*Vec3D(triangles().back()[0]);
    Vec3D lineTo = rayCast.intersected ? rayCast.pointOfIntersection : position() + -lookAt() * ShooterConsts::FIRE_DISTANCE + randV;
    _addTraceCallBack(lineFrom, lineTo);

    return damagedPlayers;
}