AdventuresInLestoria/Adventures in Lestoria/Bullet.cpp

#pragma region License
/*
License (OLC-3)
~~~~~~~~~~~~~~~

Copyright 2024 Joshua Sigona <sigonasr2@gmail.com>

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

1. Redistributions or derivations of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

2. Redistributions or derivative works in binary form must reproduce the above
copyright notice. This list of conditions and the following	disclaimer must be
reproduced in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may
be used to endorse or promote products derived from this software without specific
prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	"AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
SHALL THE COPYRIGHT	HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL,	SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

Portions of this software are copyright © 2024 The FreeType
Project (www.freetype.org). Please see LICENSE_FT.txt for more information.
All rights reserved.
*/
#pragma endregion
#include "Bullet.h"
#include "AdventuresInLestoria.h"
#include "DEFINES.h"
#include "safemap.h"
#include "util.h"

INCLUDE_ANIMATION_DATA
INCLUDE_game
INCLUDE_GFX
INCLUDE_MONSTER_LIST
INCLUDE_WINDOW_SIZE

Bullet::Bullet(vf2d pos,vf2d vel,float radius,int damage,bool upperLevel,bool friendly,Pixel col,vf2d scale,float image_angle)
	:pos(pos),vel(vel),radius(radius),damage(damage),col(col),friendly(friendly),upperLevel(upperLevel),scale(scale),image_angle(image_angle){};

Bullet::Bullet(vf2d pos,vf2d vel,float radius,int damage,std::string animation,bool upperLevel,bool hitsMultiple,float lifetime,bool rotatesWithAngle,bool friendly,Pixel col,vf2d scale,float image_angle)
	:pos(pos),vel(vel),radius(radius),damage(damage),col(col),animated(true),rotates(rotatesWithAngle),lifetime(lifetime),hitsMultiple(hitsMultiple),friendly(friendly),upperLevel(upperLevel),scale(scale),image_angle(image_angle){
	this->animation.AddState(animation,ANIMATION_DATA[animation]);
	this->animation.ChangeState(internal_animState,animation);
};

Animate2D::Frame Bullet::GetFrame()const{
	return animation.GetFrame(internal_animState);
}
void Bullet::UpdateFadeTime(float fElapsedTime)
{
	if(fadeInTime>0){
		if(fadeInTimer<fadeInTime){
			fadeInTimer=std::min(fadeInTime,fadeInTimer+fElapsedTime);
			if(fadeInTimer==fadeInTime)deactivated=false;
		}
	}
	if(fadeOutTime>0){
		if(fadeOutTimer==0){
			lifetime=fadeOutTime;
		}
		fadeOutTimer+=fElapsedTime;
	}
}

void Bullet::Update(float fElapsedTime){}

void Bullet::SimulateUpdate(const float fElapsedTime){
	simulated=true;
	_Update(fElapsedTime);
	simulated=false;
}

void Bullet::_Update(const float fElapsedTime){
	UpdateFadeTime(fElapsedTime);
	Update(fElapsedTime);
	animation.UpdateState(internal_animState,fElapsedTime);
	if(!deactivated){
		float totalDistance=(vel*fElapsedTime).mag();
		int iterations=int(std::max(1.f,(vel*fElapsedTime).mag()));
		int totalIterations=iterations;
		vf2d finalBulletPos=pos+vel*fElapsedTime;
		distanceTraveled+=totalDistance/24.f*100.f;
		const auto CollisionCheck=[&](){
			if(simulated)return true;
			if(friendly){
				for(std::unique_ptr<Monster>&m:MONSTER_LIST){
					if(geom2d::overlaps(m->BulletCollisionHitbox(),geom2d::circle(pos,radius))){
						if(hitList.find(&*m)==hitList.end()&&m->Hurt(damage,OnUpperLevel(),z)){
							if(!hitsMultiple){
								if(_MonsterHit(*m)){
									dead=true;
								}
								return false;
							}else _MonsterHit(*m);
							hitList.insert(&*m);
						}
					}
				}
			} else {
				if(geom2d::overlaps(game->GetPlayer()->Hitbox(),geom2d::circle(pos,radius))){
					if(hitList.find(game->GetPlayer())==hitList.end()&&game->GetPlayer()->Hurt(damage,OnUpperLevel(),z)){
						if(!hitsMultiple){
							if(_PlayerHit(&*game->GetPlayer())){
								dead=true;
							}
							return false;
						}else _PlayerHit(&*game->GetPlayer());
						hitList.insert(game->GetPlayer());
					}
				}
			}
			return true;
		};

		while(iterations>0){
			iterations--;
			pos+=(vel*fElapsedTime)/float(totalIterations);
			if(!CollisionCheck()){
				return;
			}
		}
		pos=finalBulletPos;
		if(!CollisionCheck()){
			return;
		}
	}else{
		pos+=vel*fElapsedTime;
	}
	if(IsPlayerAutoAttackProjectile()){pos+=game->GetWindSpeed()*game->GetElapsedTime();}
	if(/*World size in PIXELS!*/vi2d worldSize=game->GetCurrentMapData().MapSize*game->GetCurrentMapData().TileSize;pos.x+radius<-WINDOW_SIZE.x||pos.x-radius>worldSize.x+WINDOW_SIZE.x||pos.y+radius<-WINDOW_SIZE.y||pos.y-radius>worldSize.y+WINDOW_SIZE.y){
		dead=true;
		return;
	}
	lifetime-=fElapsedTime;
	if(lifetime<=0){
		dead=true;
		return;
	}
}

void Bullet::Draw()const{
	Pixel blendCol=col;
	
	if(fadeInTime==0&&fadeOutTime==0)blendCol.a=col.a;
	else if(fadeOutTime>0)blendCol.a=uint8_t(util::lerp(col.a,0,1-((fadeOutTime-fadeOutTimer)/fadeOutTime)));
	else if(fadeInTime>0)blendCol.a=uint8_t(util::lerp(col.a,0,((fadeInTime-fadeInTimer)/fadeInTime)));

	if(GetZ()>0){
		vf2d shadowScale=vf2d{8*scale.x/3.f,1}/std::max(1.f,GetZ()/8);
		game->view.DrawDecal(pos-vf2d{3,3}*shadowScale/2+vf2d{0,12*scale.y},GFX["circle.png"].Decal(),shadowScale,BLACK);
	}
	
	const bool NotOnTitleScreen=GameState::STATE!=GameState::states[States::MAIN_MENU];

	if(NotOnTitleScreen
		&&(game->GetPlayer()->HasIframes()||game->GetPlayer()->GetZ()>1)){
		blendCol.a/=1.59f; //Comes from 255 divided by 160 which is roughly what we want the alpha to be when the bullet has full transparency.
	}

	if(animated){
		game->view.DrawPartialRotatedDecal(pos-vf2d{0,GetZ()}+drawOffsetY,GetFrame().GetSourceImage()->Decal(),rotates?atan2(vel.y,vel.x)-PI/2+image_angle:image_angle,GetFrame().GetSourceRect().size/2,GetFrame().GetSourceRect().pos,GetFrame().GetSourceRect().size,scale,blendCol);
	}else{
		game->view.DrawRotatedDecal(pos-vf2d{0,GetZ()}+drawOffsetY-GFX["circle.png"].Sprite()->Size()*scale/2,GFX["circle.png"].Decal(),image_angle,GFX["circle.png"].Sprite()->Size()/2,scale,blendCol);
		game->view.DrawRotatedDecal(pos-vf2d{0,GetZ()}+drawOffsetY-GFX["circle.png"].Sprite()->Size()*scale/2,GFX["circle_outline.png"].Decal(),image_angle,GFX["circle.png"].Sprite()->Size()/2,scale,Pixel{WHITE.r,WHITE.g,WHITE.b,blendCol.a});
	}
}

bool Bullet::_PlayerHit(Player*player){
	const bool destroyBullet=PlayerHit(player);
	if(iframeTimerOnHit>0.f)player->ApplyIframes(iframeTimerOnHit);
	return destroyBullet;
}
bool Bullet::_MonsterHit(Monster&monster){
	const bool destroyBullet=MonsterHit(monster);
	if(iframeTimerOnHit>0.f)monster.ApplyIframes(iframeTimerOnHit);
	return destroyBullet;
}
bool Bullet::PlayerHit(Player*player){return true;}
bool Bullet::MonsterHit(Monster&monster){return true;}
bool Bullet::OnUpperLevel(){return upperLevel;}

const bool Bullet::IsDead()const{
	return dead;
}

const float Bullet::GetZ()const{
	return z;
}

Bullet&Bullet::SetIframeTimeOnHit(float iframeTimer){
	iframeTimerOnHit=iframeTimer;
	return *this;
}
Bullet&Bullet::SetFadeinTime(float fadeInTime){
	const float durationDiff=fadeInTime-fadeInTimer;
	this->fadeInTime=fadeInTime;
	lifetime+=durationDiff;
	deactivated=true;
	return *this;
}

const float&Bullet::GetFadeoutTimer()const{
	return fadeOutTimer;
}

Bullet&Bullet::SetIsPlayerAutoAttackProjectile(){
	playerAutoAttackProjectile=true;
	return *this;
}

const bool Bullet::IsPlayerAutoAttackProjectile()const{
	return playerAutoAttackProjectile;
}

void Bullet::AddVelocity(vf2d vel){
	this->vel+=vel*game->GetElapsedTime();
}