Comora

A simple 2D camera for Monogame.

Install

Available on NuGet

Quickstart

private Camera camera;

protected override void Initialize()
{
	this.camera = new Camera(this.graphics);
	
	base.Initialize();
}

protected override void Update(GameTime gameTime)
{
	this.camera.Update(gameTime);
	
	this.camera.Position = Mouse.GetState().Position.ToVector2();
	
	base.Update(gameTime);
}

protected override void Draw(GameTime gameTime)
{
    graphics.GraphicsDevice.Clear(Color.CornflowerBlue);
    
	spriteBatch.Begin(this.camera);
	// Draw here
	spriteBatch.End();

	base.Draw(gameTime);
}

Draw

Through the SpriteBatch extension methods, simply call Begin as usual, but with your camera :

spriteBatch.Begin(this.camera);

You can add a parralax factor too :

spriteBatch.Begin(this.camera, new Vector2(0.85f,0.85f));

Animations

You can add animation by applying Transform velocities or tweens onto the the camera's Transform property.

Conversion

You can convert a point from screen unit to world :

var screenPosition = Vector.Zero;
var worldPosition = Vector.Zero;
camera.ToWorld(ref screenPosition, out worldPosition);

Converting world coordinates to screen coordinates is also possible.

var screenPosition = Vector.Zero;
var worldPosition = Vector.Zero;
camera.ToScreen(ref worldPosition, out screenPosition);

Debug tools

The framework provide several tools for debugging purpose.

camera.Debug.IsVisible = Keyboard.GetState().IsKeyDown(Keys.F1);

Make sure to load content too :

this.camera.LoadContent(GraphicsDevice);

And then draw it with Draw extension method. You don't have to call spriteBatch.Begin and spriteBatch.End which are already invoked by the method.

this.spriteBatch.Draw(this.camera.Debug);

FPS

The number of frame per seconds will be displayed on the layer.

Grid

A visual grid for world units.

// To draw a white line of size 2 every 50 world units
// and a red one of size 4 every 200 world units.
camera.Debug.Grid.AddLines(50, Color.White, 2);
camera.Debug.Grid.AddLines(200, Color.Red, 4);

Roadmap / Ideas

• Integrate shaders for easy screen effects.
• Add more built-in animations.
• Clean and improve debug layer.

Why?

"Seriously, just a camera ?" ... Yes! I often see full engines with tons of stuff I never need. I'm looking about modularity and easy APIs (like many awesome LÖVE libraries) and that's why I created Comora. I'm sure this could be useful for someone else.

Thanks

• david-gouveia
• Monogame.Extended

Contributions

Contributions are welcome! If you find a bug please report it and if you want a feature please report it.

If you want to contribute code please file an issue and create a branch off of the current dev branch and file a pull request.

License

MIT © Aloïs Deniel