Kav/Cameras/Camera.cs

using Microsoft.Xna.Framework;

namespace Kav
{
    public struct PerspectiveCamera
    {
        public Matrix View { get; }
        public Matrix Projection { get; }

        public Vector3 Position { get; }
        public Vector3 Forward { get; }
        public Vector3 Up { get; }
        public Vector3 Right { get; }

        public float FieldOfView { get; }
        public float AspectRatio { get; }
        public float NearPlane { get; }
        public float FarPlane { get; }

        public PerspectiveCamera(
            Vector3 position,
            Vector3 forward,
            Vector3 up,
            float fieldOfView,
            float aspectRatio,
            float nearPlane,
            float farPlane
        ) {
            Position = position;
            Forward = forward;
            Up = up;
            Right = Vector3.Cross(forward, up);
            View = Matrix.CreateLookAt(Position, Position + Forward, Up);

            FieldOfView = fieldOfView;
            AspectRatio = aspectRatio;
            NearPlane = nearPlane;
            FarPlane = farPlane;
            Projection = Matrix.CreatePerspectiveFieldOfView(FieldOfView, AspectRatio, NearPlane, FarPlane);
        }
    }
}