99 lines
2.6 KiB
C#
99 lines
2.6 KiB
C#
using System;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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using Syntriax.Engine.Core.Abstract;
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namespace Syntriax.Engine.Core;
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public class CameraBehaviour : BehaviourOverride, ICamera
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{
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public Action<ICamera>? OnPositionChanged { get; set; } = null;
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public Action<ICamera>? OnMatrixTransformChanged { get; set; } = null;
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public Action<ICamera>? OnViewportChanged { get; set; } = null;
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public Action<ICamera>? OnRotationChanged { get; set; } = null;
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public Action<ICamera>? OnZoomChanged { get; set; } = null;
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private Matrix _matrixTransform = Matrix.Identity;
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private Viewport _viewport = default;
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private float _zoom = 1f;
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public Matrix MatrixTransform
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{
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get => _matrixTransform;
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set
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{
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if (_matrixTransform == value)
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return;
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_matrixTransform = value;
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OnMatrixTransformChanged?.Invoke(this);
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}
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}
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public Vector2 Position
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{
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get => Transform.Position;
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set => Transform.Position = value;
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}
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public Viewport Viewport
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{
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get => _viewport;
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set
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{
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if (_viewport.Equals(value))
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return;
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_viewport = value;
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OnViewportChanged?.Invoke(this);
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}
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}
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public float Zoom
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{
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get => _zoom;
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set
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{
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float newValue = value >= .1f ? value : .1f;
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if (_zoom == newValue)
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return;
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_zoom = newValue;
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OnZoomChanged?.Invoke(this);
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}
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}
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public float Rotation
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{
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get => Transform.Rotation;
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set => Transform.Rotation = value;
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}
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public void Update()
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{
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MatrixTransform =
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Matrix.CreateTranslation(new Vector3(-Position.X, Position.Y, 0f)) *
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Matrix.CreateRotationZ(Rotation) *
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Matrix.CreateScale(Zoom) *
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Matrix.CreateTranslation(new Vector3(_viewport.Width * .5f, _viewport.Height * .5f, 0f));
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}
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protected override void OnInitialize()
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{
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Transform.OnRotationChanged += OnTransformRotationChanged;
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Transform.OnPositionChanged += OnTransformPositionChanged;
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}
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protected override void OnFinalize()
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{
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Transform.OnRotationChanged -= OnTransformRotationChanged;
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Transform.OnPositionChanged -= OnTransformPositionChanged;
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}
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private void OnTransformRotationChanged(ITransform _) => OnRotationChanged?.Invoke(this);
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private void OnTransformPositionChanged(ITransform _) => OnPositionChanged?.Invoke(this);
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}
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