Engine-Pong/Game/Behaviours/CameraController.cs

77 lines
3.4 KiB
C#

using Microsoft.Xna.Framework.Input;
using Syntriax.Engine.Core;
using Syntriax.Engine.Input;
namespace Pong.Behaviours;
public class CameraController : BehaviourOverride
{
private MonoGameCamera2DBehaviour cameraBehaviour = null!;
private IButtonInputs<Keys> buttonInputs = null!;
private float defaultZoomLevel = 1f;
protected override void OnFirstActiveFrame()
{
if (BehaviourController.TryGetBehaviour(out MonoGameCamera2DBehaviour? foundCameraBehaviour))
cameraBehaviour = foundCameraBehaviour;
cameraBehaviour ??= BehaviourController.AddBehaviour<MonoGameCamera2DBehaviour>();
if (BehaviourController.TryGetBehaviour(out IButtonInputs<Keys>? foundButtonInputs))
buttonInputs = foundButtonInputs;
buttonInputs ??= BehaviourController.AddBehaviour<KeyboardInputsBehaviour>();
buttonInputs.RegisterOnPress(Keys.F, SwitchToFullScreen);
buttonInputs.RegisterOnPress(Keys.R, ResetCamera);
}
protected override void OnUpdate()
{
if (buttonInputs.IsPressed(Keys.U))
cameraBehaviour.Zoom += Time.Elapsed.Nanoseconds * 0.00025f;
if (buttonInputs.IsPressed(Keys.J))
cameraBehaviour.Zoom -= Time.Elapsed.Nanoseconds * 0.00025f;
if (buttonInputs.IsPressed(Keys.NumPad8))
cameraBehaviour.BehaviourController.GameObject.Transform.Position += Vector2D.Up;
if (buttonInputs.IsPressed(Keys.NumPad2))
cameraBehaviour.BehaviourController.GameObject.Transform.Position -= Vector2D.Up;
if (buttonInputs.IsPressed(Keys.NumPad6))
cameraBehaviour.BehaviourController.GameObject.Transform.Position += Vector2D.Right;
if (buttonInputs.IsPressed(Keys.NumPad4))
cameraBehaviour.BehaviourController.GameObject.Transform.Position -= Vector2D.Right;
if (buttonInputs.IsPressed(Keys.Q))
cameraBehaviour.BehaviourController.GameObject.Transform.Rotation += Time.Elapsed.Nanoseconds * 0.0025f;
if (buttonInputs.IsPressed(Keys.E))
cameraBehaviour.BehaviourController.GameObject.Transform.Rotation -= Time.Elapsed.Nanoseconds * 0.0025f;
}
private void SwitchToFullScreen(IButtonInputs<Keys> inputs, Keys keys)
{
if (cameraBehaviour.Graphics.IsFullScreen)
return;
cameraBehaviour.Graphics.PreferMultiSampling = false;
cameraBehaviour.Graphics.PreferredBackBufferWidth = cameraBehaviour.Graphics.GraphicsDevice.Adapter.CurrentDisplayMode.Width;
cameraBehaviour.Graphics.PreferredBackBufferHeight = cameraBehaviour.Graphics.GraphicsDevice.Adapter.CurrentDisplayMode.Height;
cameraBehaviour.Graphics.IsFullScreen = true;
cameraBehaviour.Graphics.ApplyChanges();
float previousScreenSize = Math.Sqrt(Math.Sqr(cameraBehaviour.Viewport.Width) + Math.Sqr(cameraBehaviour.Viewport.Height));
float currentScreenSize = Math.Sqrt(Math.Sqr(cameraBehaviour.Graphics.GraphicsDevice.Viewport.Width) + Math.Sqr(cameraBehaviour.Graphics.GraphicsDevice.Viewport.Height));
defaultZoomLevel /= previousScreenSize / currentScreenSize;
cameraBehaviour.Zoom /= previousScreenSize / currentScreenSize;
cameraBehaviour.Viewport = cameraBehaviour.Graphics.GraphicsDevice.Viewport;
}
private void ResetCamera(IButtonInputs<Keys> inputs, Keys keys)
{
cameraBehaviour.Zoom = defaultZoomLevel;
Transform.Position = Vector2D.Zero;
Transform.Rotation = 0f;
}
}