CollisionProfile.cs

using Newtonsoft.Json;
 
namespace Gondwana.Physics.Collisions;

public sealed class CollisionProfile
{
    [JsonConstructor]
    public CollisionProfile(
        string name,
        string collisionGroup,
        IEnumerable<string>? collidesWith = null,
        bool collidesWithAll = false)
    {
        if (string.IsNullOrWhiteSpace(name))
            throw new ArgumentException("Collision profile name cannot be empty.", nameof(name));
 
        if (string.IsNullOrWhiteSpace(collisionGroup))
            throw new ArgumentException("Collision profile group cannot be empty.", nameof(collisionGroup));
 
        Name = name;
        CollisionGroup = collisionGroup;
        CollidesWith = collidesWith?.ToList() ?? [];
        CollidesWithAll = collidesWithAll;
    }

    public string Name { get; private set; }

    public string CollisionGroup { get; set; }

    public List<string> CollidesWith { get; private set; }

    public bool CollidesWithAll { get; set; }

    public int ResolveCollisionGroup(CollisionGroupRegistry groups)
    {
        ArgumentNullException.ThrowIfNull(groups);
        return groups.Get(CollisionGroup);
    }

    public int ResolveCollidesWith(CollisionGroupRegistry groups)
    {
        ArgumentNullException.ThrowIfNull(groups);
        return CollidesWithAll
            ? CollisionMasks.All
            : groups.GetMask(CollidesWith);
    }
}