SFML/DSFML/samples/dsfml/sound3d/sound3d.d

module sound3d;

import dsfml.system.all;
import dsfml.window.all;
import dsfml.graphics.all;
import dsfml.audio.all;

void main()
{
	//We create our window with a limit of 100 and a white backcolor.
	RenderWindow app = new RenderWindow (VideoMode(800, 600, 32), "Sound Spatialization Sample");
	app.useVerticalSync(true);
	
	Font f = new Font("Data/cheeseburger.ttf");
	
	//Some instructions
	Text s = new Text("Click anywhere on screen to change listener position.\nPress + or - to modify the speed of the car."c, f);
	
	s.characterSize = 34;
	s.setPosition(20, 30);
	s.color = Color.BLACK;
	
	//We prepare our images and the sound
	string[2] images = ["Data/bluerallyecarleft.bmp", "Data/bluerallyecarright.bmp"];
	Car c = new Car(images, "Data/car_idle.wav");
	
	int carSpeed = 100;
	
	//Set default position for the car and the listener
	c.position = Vector2f(0, 300);
	SoundListener.position = Vector2f(400, 300);
	
	c.startPlaying();
	
	//Start the main loop
	while (app.isOpened())
	{
		app.clear(Color.WHITE);
		Event evt;
		//The event loop
		while (app.getEvent(evt))
		{
			// if the window is closed, we can leave the game loop
			if (evt.Type == EventType.Closed) 
				app.close();
			// we handle the click event to change listener position
			else if (evt.Type == EventType.MouseButtonPressed && evt.MouseButton.Button == MouseButtons.Left)
			{
				Input i = app.input;
				SoundListener.position = Vector2f(i.mouseX, i.mouseY);
			}
			// and eventual keys press
			else if (evt.Type == EventType.KeyPressed)
			{
				//Change the car speed
				if (evt.Key.Code == KeyCode.Add)
				{
					carSpeed += 25;
				}
				else if (evt.Key.Code == KeyCode.Substract)
				{
					carSpeed -= 25;
				}
			}
		}
		
		//We move constantly our car.
		c.move(Vector2f(app.frameTime * carSpeed, 0));
	
		//Draw all the sprite and string on render window
		app.draw(s);
		app.draw(c.sprite);
		app.draw(SoundListener.sprite);
		
		//And finally display the window
		app.display();
	} 
	
	
}

// Encapsulate the listener position and the visor sprite.
// There is only one listener so all the methods are statics.
class SoundListener
{
	static Sprite s_crosshair;
	static Vector2f s_p;
	
	static this()
	{
		Image crosshairImg = new Image("Data/crosshair.tga");				
		crosshairImg.createMaskFromColor(Color.WHITE);
		
		s_crosshair = new Sprite(crosshairImg);
		s_crosshair.setOrigin(s_crosshair.size.x / 2, s_crosshair.size.y / 2);
		
		//Listener.setTarget(1.f, 0.f, 0.f);
	}
	
	// Adjust position of the listener
	@property static void position(Vector2f p)
	{
		Listener.setPosition(p.x, p.y, 5.f);
		s_crosshair.setPosition(p.x, p.y);
	}
	
	@property static Sprite sprite()
	{
		return s_crosshair;
	}  
}


//! Class encapsulating all data for our car
class Car
{
	Vector2f m_actual;
	Sprite m_sprite;
	Sound m_sound;
	bool reverse;
	Image[2] imgs;
	
	//Constructor with with a fixed size string array of image path, and a string for the sound path 
	this (string[2] images, string soundFilename)
	{
		//load images and create filter
		imgs[0] = new Image(images[0]); imgs[1] = new Image(images[1]);
			
		foreach(img; imgs)
			img.createMaskFromColor(Color(97, 68, 43));
		
		m_sprite = new Sprite(imgs[0]);
		m_sprite.setOrigin(m_sprite.size.x / 2, m_sprite.size.y / 2);
		
		SoundBuffer buff = new SoundBuffer(soundFilename);
		
		//load our sound with loop enabled
		m_sound = new Sound(buff, true);
		m_sound.attenuation = .05f;
	}
	
	// Begin the sound play
	void startPlaying()
	{
		m_sound.play();	
	}
	
	// Set the position of the car on the window
	// Used to setup the begin car window and sound location 
	@property void position(Vector2f p)
	{
		m_sprite.setPosition(p.x, p.y);
		m_sound.setPosition(p.x, 0, p.y);
	}
	
	//Move the car (visual and sound position)
	//If the car leave the screen, we change the sprite image and reverse moving
	void move(Vector2f vec)
	{
		// if the car is beyond the right screen limit
		if (!reverse && m_sprite.position.x > 850)
		{
			m_sprite.setImage(imgs[1]);
			reverse = true;
		}
		// same as above but for left limit
		else if (reverse && vec.x + m_sprite.position.x < -50)
		{
			m_sprite.setImage(imgs[0]);
			reverse = false;
		}
		
		if (reverse)
			vec = -vec;
			
		m_sprite.move(vec);
		Vector2f pos = m_sprite.position;
		m_sound.setPosition(pos.x , pos.y, 0);
	}

	@property Sprite sprite()
	{
		return m_sprite;
	}
}