openrw/rwgame/ingamestate.cpp

#include "ingamestate.hpp"
#include "RWGame.hpp"
#include "pausestate.hpp"
#include "debugstate.hpp"
#include "DrawUI.hpp"

#include <ai/PlayerController.hpp>
#include <objects/CharacterObject.hpp>
#include <objects/VehicleObject.hpp>
#include <objects/ItemPickup.hpp>
#include <render/Model.hpp>
#include <items/WeaponItem.hpp>
#include <engine/GameWorld.hpp>
#include <engine/GameState.hpp>
#include <script/ScriptMachine.hpp>
#include <dynamics/RaycastCallbacks.hpp>

#define AUTOLOOK_TIME 2.f

IngameState::IngameState(RWGame* game, bool newgame, bool test)
	: State(game), started(false), newgame(newgame), test(test),
	autolookTimer(0.f), camMode(IngameState::CAMERA_NORMAL)
{
}

void IngameState::startTest()
{
	auto playerChar = getWorld()->createPlayer({270.f, -605.f, 40.f});
	auto player = new PlayerController(playerChar);

	getWorld()->state->playerObject = playerChar->getGameObjectID();

	/*auto bat = new WeaponItem(getWorld()->data.weaponData["ak47"]);
	_playerCharacter->addToInventory(bat);
	_playerCharacter->setActiveItem(bat->getInventorySlot());*/

	glm::vec3 itemspawn( 276.5f, -609.f, 36.5f);
	for( auto& w : getWorld()->data->weaponData ) {
		if( w->name == "unarmed" ) continue;
		getWorld()->insertObject(new ItemPickup(getWorld(), itemspawn,
												  w));
		itemspawn.x += 2.5f;
	}

	auto carPos = glm::vec3( 286.f, -591.f, 37.f );
	auto carRot = glm::angleAxis(glm::radians(90.f), glm::vec3(0.f, 0.f, 1.f));
	//auto boatPos = glm::vec3( -1000.f, -1040.f, 5.f );
	int i = 0;
	for( auto& vi : getWorld()->data->objectTypes ) {
		switch( vi.first ) {
		case 140: continue;
		case 141: continue;
		}
		if( vi.second->class_type == ObjectInformation::_class("CARS") )
		{
			if ( i++ > 20 ) break;
			auto vehicle = std::static_pointer_cast<VehicleData>(vi.second);

			auto& sp = carPos;
			auto& sr = carRot;
			auto v = getWorld()->createVehicle(vi.first, sp, sr);

			sp += sr * glm::vec3( 2.f + v->info->handling.dimensions.x, 0.f, 0.f);
		}
	}
}

void IngameState::startGame()
{
	game->startScript("data/main.scm");
	game->getScript()->startThread(0);
	getWorld()->sound.playBackground( getWorld()->data->getDataPath() + "/audio/City.wav" );
}

void IngameState::enter()
{
	if( ! started )
	{
		if( newgame )
		{
			if( test ) {
				startTest();
			}
			else {
				startGame();
			}
		}
		started = true;
	}
}

void IngameState::exit()
{

}

void IngameState::tick(float dt)
{
	autolookTimer = std::max(autolookTimer - dt, 0.f);

	auto player = game->getPlayer();
	if( player && player->isInputEnabled() && game->hasFocus() )
	{
		float qpi = glm::half_pi<float>();

		sf::Vector2f screenSize(getWindow().getSize());
		sf::Vector2f screenCenter(screenSize / 2.f);
		sf::Vector2f mousePos(sf::Mouse::getPosition(getWindow()));
		sf::Vector2f deltaMouse = (mousePos - screenCenter);
		sf::Vector2f mouseMove(deltaMouse.x / screenSize.x, deltaMouse.y / screenSize.y);
		sf::Mouse::setPosition(sf::Vector2i(screenCenter), getWindow());
		
		if(deltaMouse.x != 0 || deltaMouse.y != 0)
		{
			autolookTimer = AUTOLOOK_TIME;
		}

		float viewDistance = 4.f;
		switch( camMode )
		{
		case IngameState::CAMERA_CLOSE:
			viewDistance = 2.f;
			break;
		case IngameState::CAMERA_NORMAL:
			viewDistance = 4.0f;
			break;
		case IngameState::CAMERA_FAR:
			viewDistance = 6.f;
			break;
		case IngameState::CAMERA_TOPDOWN:
			viewDistance = 15.f;
			break;
		default:
			viewDistance = 4.f;
		}
		
		auto target = getWorld()->findObject(getWorld()->state->cameraTarget);

		if( target == nullptr )
		{
			target = player->getCharacter();
		}

		glm::vec3 targetPosition = target->getPosition();
		glm::vec3 lookTargetPosition = targetPosition;
		targetPosition += glm::vec3(0.f, 0.f, 1.f);
		lookTargetPosition += glm::vec3(0.f, 0.f, 0.5f);

		btCollisionObject* physTarget = player->getCharacter()->physObject;

		auto vehicle = ( target->type() == GameObject::Character ) ? static_cast<CharacterObject*>(target)->getCurrentVehicle() : nullptr;
		if( vehicle ) {
			auto model = vehicle->model;
			float maxDist = 0.f;
			for(auto& g : model->resource->geometries) {
				float partSize = glm::length(g->geometryBounds.center) + g->geometryBounds.radius;
				maxDist = std::max(partSize, maxDist);
			}
			viewDistance = viewDistance + maxDist;
			targetPosition = vehicle->getPosition();
			lookTargetPosition = targetPosition;
			lookTargetPosition.z += (vehicle->info->handling.dimensions.z);
			targetPosition.z += (vehicle->info->handling.dimensions.z * 2.f);
			physTarget = vehicle->physBody;
		}

		// Non-topdown camera can orbit
		if( camMode != IngameState::CAMERA_TOPDOWN )
		{
			// Rotate the cameraPosition vector around targetPosition by the mouse movement
			auto camtotarget = targetPosition - cameraPosition;
			float camAngle = glm::atan(camtotarget.y, camtotarget.x);
			glm::quat epsilon( glm::vec3( 0.f, 0.f, camAngle) );
			glm::quat theta( glm::vec3(0.f, 0.f, -mouseMove.x) );
			glm::quat rho( epsilon * glm::vec3(0.f, mouseMove.y, 0.f) );
			cameraPosition = targetPosition - (theta * (rho * camtotarget));
		}
		else
		{
			cameraPosition = targetPosition + glm::vec3(0.f, 0.f, viewDistance);
		}

		glm::quat angle;

		auto camtotarget = targetPosition - cameraPosition;
		auto dir = glm::normalize(camtotarget);
		float correction = glm::length(camtotarget) - viewDistance;
		if( correction < 0.f )
		{
			float innerDist = viewDistance * 0.1f;
			correction = glm::min(0.f, correction + innerDist);
		}
		cameraPosition += dir * 10.f * correction * dt;

		auto lookdir = glm::normalize(lookTargetPosition - cameraPosition);
		// Calculate the yaw to look at the target.
		float angleYaw = glm::atan(lookdir.y, lookdir.x);
		angle = glm::quat( glm::vec3(0.f, 0.f, angleYaw) );

		// Update player with camera yaw
		if( player->isInputEnabled() )
		{
			player->updateMovementDirection(angle * _movement, _movement);
		}
		else
		{
			player->updateMovementDirection(glm::vec3(0.f, 0.f, 0.f), glm::vec3(0.f,0.f,0.f));
		}

		float len2d = glm::length(glm::vec2(lookdir));
		float anglePitch = glm::atan(lookdir.z, len2d);
		angle *= glm::quat( glm::vec3(0.f, -anglePitch, 0.f) );

		// Use rays to ensure target is visible from cameraPosition
		auto rayEnd = cameraPosition;
		auto rayStart = targetPosition;
		auto to = btVector3(rayEnd.x, rayEnd.y, rayEnd.z);
		auto from = btVector3(rayStart.x, rayStart.y, rayStart.z);
		ClosestNotMeRayResultCallback ray(physTarget, from, to);

		getWorld()->dynamicsWorld->rayTest(from, to, ray);
		if( ray.hasHit() && ray.m_closestHitFraction < 1.f )
		{
			cameraPosition = glm::vec3(ray.m_hitPointWorld.x(), ray.m_hitPointWorld.y(),
							ray.m_hitPointWorld.z());
			cameraPosition += glm::vec3(ray.m_hitNormalWorld.x(), ray.m_hitNormalWorld.y(),
							ray.m_hitNormalWorld.z()) * 0.1f;
		}

		_look.position = cameraPosition;
		_look.rotation = angle;
	}
}

void IngameState::draw(GameRenderer* r)
{
	if( !getWorld()->state->isCinematic && getWorld()->isCutsceneDone() )
	{
		drawHUD(game->getPlayer(), getWorld(), r);
	}
	
    State::draw(r);
}

void IngameState::handleEvent(const sf::Event &event)
{
	auto player = game->getPlayer();

	switch(event.type) {
	case sf::Event::KeyPressed:
		switch(event.key.code) {
		case sf::Keyboard::Escape:
			StateManager::get().enter(new PauseState(game));
			break;
		case sf::Keyboard::M:
			StateManager::get().enter(new DebugState(game, _look.position, _look.rotation));
			break;
		case sf::Keyboard::Space:
			if( getWorld()->state->currentCutscene )
			{
				getWorld()->state->skipCutscene = true;
			}
			break;
		case sf::Keyboard::C:
			camMode = CameraMode((camMode+(CameraMode)1)%CAMERA_MAX);
			break;
		case sf::Keyboard::W:
			_movement.x = 1.f;
			break;
		case sf::Keyboard::S:
			_movement.x =-1.f;
			break;
		case sf::Keyboard::A:
			_movement.y = 1.f;
			break;
		case sf::Keyboard::D:
			_movement.y =-1.f;
			break;
		default: break;
		}
		break;
	case sf::Event::KeyReleased:
		switch(event.key.code) {
		case sf::Keyboard::W:
		case sf::Keyboard::S:
			_movement.x = 0.f;
			break;
		case sf::Keyboard::A:
		case sf::Keyboard::D:
			_movement.y = 0.f;
			break;
		default: break;
		}
		break;
	default: break;
	}
	
	if( player && player->isInputEnabled() )
	{
		handlePlayerInput(event);
	}
	State::handleEvent(event);
}

void IngameState::handlePlayerInput(const sf::Event& event)
{
	auto player = game->getPlayer();
	switch(event.type) {
	case sf::Event::KeyPressed:
		switch(event.key.code) {
		case sf::Keyboard::Space:
			if( player->getCharacter()->getCurrentVehicle() ) {
				player->getCharacter()->getCurrentVehicle()->setHandbraking(true);
			}
			else
			{
				player->jump();
			}
			break;
		case sf::Keyboard::LShift:
			player->setRunning(true);
			break;
		case sf::Keyboard::F:
			if( player->getCharacter()->getCurrentVehicle()) {
				player->exitVehicle();
			}
			else {
				player->enterNearestVehicle();
			}
			break;
		default:
			break;
		}
	case sf::Event::KeyReleased:
		switch(event.key.code) {
		case sf::Keyboard::LShift:
			player->setRunning(false);
			break;
		default: break;
		}
	break;
	case sf::Event::MouseButtonPressed:
		switch(event.mouseButton.button) {
		case sf::Mouse::Left:
			player->useItem(true, true);
			break;
		default: break;
		}
		break;
	case sf::Event::MouseButtonReleased:
		switch(event.mouseButton.button) {
		case sf::Mouse::Left:
			player->useItem(false, true);
			break;
		default: break;
		}
		break;
	case sf::Event::MouseWheelMoved:
		player->getCharacter()->cycleInventory(event.mouseWheel.delta > 0);
		break;
	default:
		break;
	}
}


bool IngameState::shouldWorldUpdate()
{
    return true;
}

const ViewCamera &IngameState::getCamera()
{
	return _look;
}