Engine-Pong/Game/Behaviours/CameraController.cs

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using Microsoft.Xna.Framework.Input;
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using Syntriax.Engine.Core;
using Syntriax.Engine.Input;
namespace Pong.Behaviours;
public class CameraController : BehaviourOverride
{
private MonoGameCameraBehaviour cameraBehaviour = null!;
private IButtonInputs<Keys> buttonInputs = null!;
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private float defaultZoomLevel = 1f;
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protected override void OnFirstActiveFrame()
{
if (BehaviourController.TryGetBehaviour(out MonoGameCameraBehaviour? foundCameraBehaviour))
cameraBehaviour = foundCameraBehaviour;
cameraBehaviour ??= BehaviourController.AddBehaviour<MonoGameCameraBehaviour>();
if (BehaviourController.TryGetBehaviour(out IButtonInputs<Keys>? foundButtonInputs))
buttonInputs = foundButtonInputs;
buttonInputs ??= BehaviourController.AddBehaviour<KeyboardInputsBehaviour>();
buttonInputs.RegisterOnPress(Keys.F, SwitchToFullScreen);
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buttonInputs.RegisterOnPress(Keys.R, ResetCamera);
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}
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.Q))
cameraBehaviour.BehaviourController.GameObject.Transform.Rotation += Time.Elapsed.Nanoseconds * 0.000025f;
if (buttonInputs.IsPressed(Keys.E))
cameraBehaviour.BehaviourController.GameObject.Transform.Rotation -= Time.Elapsed.Nanoseconds * 0.000025f;
}
private void SwitchToFullScreen(IButtonInputs<Keys> inputs, Keys keys)
{
if (cameraBehaviour.Graphics.IsFullScreen)
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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();
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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));
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defaultZoomLevel /= previousScreenSize / currentScreenSize;
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cameraBehaviour.Zoom /= previousScreenSize / currentScreenSize;
cameraBehaviour.Viewport = cameraBehaviour.Graphics.GraphicsDevice.Viewport;
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}
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private void ResetCamera(IButtonInputs<Keys> inputs, Keys keys)
{
cameraBehaviour.Zoom = defaultZoomLevel;
Transform.Position = Vector2D.Zero;
Transform.Rotation = 0f;
}
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}