Game.cpp

Game.cpp

/*
	Copyright (C) 2018 Pharap (@Pharap)

	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing, software
	distributed under the License is distributed on an "AS IS" BASIS,
	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	See the License for the specific language governing permissions and
	limitations under the License.

	Modified by Filmote and Vampirics
*/

#include "Game.h"

#include "states/States.h"
#include "utils/Utils.h"

long t;

ISR(TIMER1_COMPA_vect)
{
    t++;
    OCR4A = ((t*(t>>8|t>>9)&46&t>>8))^(t&t>>13|t>>6); // by xpansive
}

void Game::setup(void) {

    // set up Timer 1
    TCCR1A = 0; // normal operation
    TCCR1B = _BV(WGM12) | _BV(CS10); // CTC, no pre-scaling
    OCR1A = 1999; // compare A register value (8000Hz)
    TIMSK1 = _BV(OCIE1A); // interrupt on Compare A Match

    //set up Timer 4
    TCCR4A = _BV(COM4A0) | _BV(PWM4A); // Fast-PWM 8-bit
    TCCR4B = _BV(CS40); // 62500Hz
    OCR4C = 0xFF; // Resolution to 8-bit (TOP=0xFF)
    
	auto & arduboy = this->context.arduboy;

	arduboy.boot();
	arduboy.flashlight();
	arduboy.systemButtons();
	arduboy.audio.begin();
	arduboy.initRandomSeed();
	arduboy.setFrameRate(60);

	this->currentStateId = GameStateType::SplashScreen;
	this->currentState = createState(this->currentStateId);
	this->nextStateId = this->currentStateId;

	this->currentState->activate(*this);

}

void Game::loop(void) {

	auto &arduboy = this->context.arduboy;
	if (!arduboy.nextFrame()) return;

	arduboy.pollButtons();

	if (this->currentState != nullptr) this->currentState->update(*this);

	arduboy.clear();

	if (this->currentState != nullptr) this->currentState->render(*this);

	arduboy.display();

	while (this->changePending) {

		this->currentState->deactivate(*this);

		if (this->currentStateId != this->nextStateId) {
			// Strictly speaking this does nothing, but I'm keeping it for the sake of correctness
			this->currentState->~GameState();
			this->currentState = this->createState(this->nextStateId);
			this->currentStateId = this->nextStateId;
		}

		this->changePending = false;
  	this->context.gameState = this->currentStateId;
		this->currentState->activate(*this);

	}

}

Game::Context & Game::getContext(void) {
	return this->context;
}

const Game::Context & Game::getContext(void) const {
	return this->context;
}

void Game::changeState(const StateId & stateId) {
	this->nextStateId = stateId;
	this->changePending = true;
}

Game::State * Game::createState(const StateId & stateType) {

	switch (stateType) {

		case GameStateType::Event: 		      					return new (&this->stateData[0])  EventState();
		case GameStateType::ShowCards:       					return new (&this->stateData[0])  ShowCardsState();
		case GameStateType::Resting:                  return new (&this->stateData[0])  RestingState();
		case GameStateType::TitleScreen:              return new (&this->stateData[0])  TitleScreenState();
		case GameStateType::Trap:              				return new (&this->stateData[0])  TrapState();
		case GameStateType::Treasure:      		      	return new (&this->stateData[0])  TreasureState();
		case GameStateType::Merchant:      		      	return new (&this->stateData[0])  MerchantState();
		case GameStateType::SplashScreen:             return new (&this->stateData[0])  SplashScreenState();
		case GameStateType::Winner: 			            return new (&this->stateData[0])  GameOverState();
		case GameStateType::PlayerDead: 	            return new (&this->stateData[0])  GameOverState();

		case GameStateType::Monster:
		case GameStateType::BossMonster:
		case GameStateType::MonsterFromEvent: 				return new (&this->stateData[0])  FightMonstersState();

		default: return nullptr;

	}

}