Puppet2D.Engine/Common/ContactHitEvent.cs - master - EugenyCh7/Puppet2D.Net

Puppet2D.Engine/Common/ContactHitEvent.cs

63 строки2 KB

EugenyCh7

Puppet2D.Engine.Common fix

24 авг 2025, 20:48

24 авг 2025, 20:486ed4095

using Puppet2D.Engine.Components.RigidBodies;
using Puppet2D.Engine.Worlds;
using Puppet2D.System;

namespace Puppet2D.Engine.Common
{
    /// <summary>
    /// A hit touch event is generated when two shapes collide with a speed faster than the hit speed threshold.
    /// </summary>
    public struct ContactHitEvent
    {
        private readonly B2.ShapeId shapeIdA;
        private readonly B2.ShapeId shapeIdB;

        /// <summary>
        /// The speed the shapes are approaching. Always positive. Typically in meters per second.
        /// </summary>
        public float ApproachSpeed { get; }

        /// <summary>
        /// Normal vector pointing from body A to body B.
        /// </summary>
        public Vector2 Normal { get; }

        /// <summary>
        /// Point where the shapes hit.
        /// </summary>
        public Vector2 Point { get; }

        /// <summary>
        /// Body A.
        /// </summary>
        public RigidBody BodyA { get; }

        /// <summary>
        /// Body B.
        /// </summary>
        public RigidBody BodyB { get; }

        internal ContactHitEvent(B2.ContactHitEvent contactHitEvent, World world)
        {
            shapeIdA = contactHitEvent.shapeIdA;
            shapeIdB = contactHitEvent.shapeIdB;
            ApproachSpeed = contactHitEvent.approachSpeed;
            Normal = contactHitEvent.normal;
            Point = contactHitEvent.point;
            BodyA = world.GetRigidBody(shapeIdA);
            BodyB = world.GetRigidBody(shapeIdB);
        }

        internal B2.ContactHitEvent Cast()
        {
            return new B2.ContactHitEvent
            {
                approachSpeed = ApproachSpeed,
                normal = Normal,
                point = Point,
                shapeIdA = shapeIdA,
                shapeIdB = shapeIdB
            };
        }
    }
}