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Quick Otter Camera Example

A question about the camera in Otter came up on the forums, and I whipped up a small example that could be useful to take a look at for getting started with Otter in general. The whole program is just this little chunk of code:

using Otter;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;



namespace CameraTestThing {

    class Program {

        static void Main(string[] args) {



            var game = new Game("Camera Test", 320, 180);

            game.SetWindowScale(4);

            game.Start(new TestScene());

        }

    }



    class TestScene : Scene {



        public TestScene() {

            var grid = new Grid(1000, 1000, 20, 20, Color.Grey);

            AddGraphic(grid);

            Add(new Player());

        }

    }



    class Player : Entity {



        Vector2 speed = new Vector2();

        Vector2 targetSpeed = new Vector2();

        Vector2 maxSpeed = new Vector2(2, 2);

        float accel = 0.01f;



        Axis movementAxis = Axis.CreateArrowKeys();



        public Player() {

            SetGraphic(Image.CreateRectangle(10, Color.Red));

            AddComponent(movementAxis);

        }



        public override void Update() {

            base.Update();



            targetSpeed.X = movementAxis.X * maxSpeed.X;

            targetSpeed.Y = movementAxis.Y * maxSpeed.Y;



            speed.X = Util.Approach(speed.X, targetSpeed.X, accel);

            speed.Y = Util.Approach(speed.Y, targetSpeed.Y, accel);



            X += speed.X;

            Y += speed.Y;



            Scene.CenterCamera(X, Y);

        }

    }

}

Compiling that with the latest dev version of Otter gives you a simple player object that can move around a scene. The background is a grid so that you can actually see scrolling happening. This quickly shows how to set up a movement Axis, how to apply speed to an object while getting input from the Axis, and how to center the camera on the object.