initial commit to new instance

src/Camera/Camera.cs

@@ -0,0 +1,113 @@
+using Silk.NET.Maths;
+
+namespace Engine_silk.NET;
+
+public enum MovementDirection
+{
+	Forward,
+	Backward,
+	Left,
+	Right,
+	Up,
+	Down,
+}
+
+public class Camera
+{
+	private readonly Vector3D<float> _worldUp;
+	private Vector3D<float> _position;
+	private Vector3D<float> _front;
+	private Vector3D<float> _right;
+	private Vector3D<float> _up;
+	private float _yaw;
+	private float _pitch;
+	private float _movementSpeed;
+
+	/// <summary>
+	/// The view matrix according to the current camera position and rotation
+	/// </summary>
+	public Matrix4X4<float> ViewMatrix { get => Matrix4X4.CreateLookAt(_position, _position + _front, _worldUp); }
+	public float MouseSensitivity { get; set; } = 0.1f;
+	/// <summary>
+	/// Controlls how fast the camera moves if a key is pressed
+	/// </summary>
+	public float MovementSpeed { get; set; } = 2.5f;
+	public float Fov { get; set; }
+
+	public Camera(Vector3D<float> position, float yaw = -90.0f, float pitch = 0, float movementSpeed = 2.5f, float fov = 45.0f)
+	{
+		_position = position;
+		_yaw = yaw;
+		_pitch = pitch;
+		_movementSpeed = movementSpeed;
+		Fov = fov;
+		_worldUp = Vector3D<float>.UnitY;
+
+		UpdateCameraVectors();
+	}
+
+	public void ProcessKeyboard(float deltaTime, MovementDirection direction)
+	{
+		float velocity = MovementSpeed * deltaTime;
+
+		switch (direction)
+		{
+			case MovementDirection.Forward:
+				_position += _front * velocity;
+				break;
+			case MovementDirection.Backward:
+				_position -= _front * velocity;
+				break;
+			case MovementDirection.Left:
+				_position -= _right * velocity;
+				break;
+			case MovementDirection.Right:
+				_position += _right * velocity;
+				break;
+			case MovementDirection.Up:
+				_position += _up * velocity;
+				break;
+			case MovementDirection.Down:
+				_position -= _up * velocity;
+				break;
+		}
+	}
+
+	public void ProcessMouseMovement(float xOffset, float yOffset)
+	{
+		xOffset *= MouseSensitivity; yOffset *= MouseSensitivity;
+
+		_yaw += xOffset;
+		_pitch += yOffset;
+
+		if (_pitch > 89.0f)
+			_pitch = 89.0f;
+		else if (_pitch < -89.0f)
+			_pitch = -89.0f;
+
+		UpdateCameraVectors(); // Recalculate front, right and up vectors since the view angle has changed
+	}
+
+	public void ProcessMouseScroll(float yOffset)
+	{
+		Fov -= yOffset;
+		if (Fov < 1.0f)
+			Fov = 1.0f;
+		if (Fov > 90.0f)
+			Fov = 90.0f;
+	}
+
+	private void UpdateCameraVectors()
+	{
+		Vector3D<float> front = new(
+			MathF.Cos(Maths.Convert.ToRadians(_yaw)) * MathF.Cos(Maths.Convert.ToRadians(_pitch)),
+			MathF.Sin(Maths.Convert.ToRadians(_pitch)),
+			MathF.Sin(Maths.Convert.ToRadians(_yaw)) * MathF.Cos(Maths.Convert.ToRadians(_pitch))
+			);
+		_front = Vector3D.Normalize(front);
+
+		_right = Vector3D.Normalize(Vector3D.Cross(_front, _worldUp));
+		_up = Vector3D.Normalize(Vector3D.Cross(_right, _front));
+	}
+
+}