MythoLogic Interactive Forums

Posted: **Sat Jul 27, 2019 2:06 pm**

Scripting 10 - Listening on explosions

Scripting in SFD assumes you have a fair knowledge of C#.

The following code demonstrates how to listen on triggered explosions in v.1.3.0.

Code: Select all

Events.ExplosionHitCallback m_explosionHitEvent = null;
         
 public void OnStartup() {
	m_explosionHitEvent = Events.ExplosionHitCallback.Start(OnExplosionHit);
 }
 public void OnExplosionHit(ExplosionData explosion, ExplosionHitArg[] args) {
	// explosion triggered
	for(int i = 0; i < args.Length; i ++) {
	   switch (args[i].HitType) {
		case ExplosionHitType.Damage:
			Game.WriteToConsole(string.Format("Explosion {0} hit {1} {2} for {3} damage", explosion.InstanceID, (args[i].IsPlayer ? "player" : "object"), args[i].ObjectID, args[i].Damage));
			break;
		case ExplosionHitType.Shockwave:
			Game.WriteToConsole(string.Format("Explosion {0} pushed {1} {2}", explosion.InstanceID, (args[i].IsPlayer ? "player" : "object"), args[i].ObjectID));
			break;
		case ExplosionHitType.None:
			Game.WriteToConsole(string.Format("Explosion {0} overlapped {1} {2}", explosion.InstanceID, (args[i].IsPlayer ? "player" : "object"), args[i].ObjectID));
			break;
	   }
	}
 }

Note: If you only want to listen on player damage you could use the PlayerDamageCallback event instead. See viewtopic.php?f=22&t=3771

ScriptAPI Implementation

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Code: Select all

	/// <summary>
    /// ExplosionHitCallback.Event explosion data
    /// </summary>
    [Serializable()]
    public struct ExplosionData
    {
        /// <summary>
        /// Instance ID of the explosion.
        /// Note that the same explosion can affect different objects under several updates, so track unique explosions using this InstanceID.
        /// </summary>
        public readonly int InstanceID;

        /// <summary>
        /// Gets the source explosion position.
        /// </summary>
        public readonly Vector2 Position;

        /// <summary>
        /// Gets the radius of the explosion.
        /// </summary>
        public readonly float Radius;

        /// <summary>
        /// Gets the max damage of the explosion
        /// </summary>
        public readonly float MaxDamage;
    }

    /// <summary>
    /// ExplosionHitCallback.Event explosion hit argument for one object
    /// </summary>
    [Serializable()]
    public struct ExplosionHitArg
    {

        /// <summary>
        /// Gets the affected object ID. 
        /// </summary>
        public readonly int ObjectID;
        
        /// <summary>
        /// Gets the hit object.
        /// </summary>
        public readonly IObject HitObject;

        /// <summary>
        /// Gets if the affected object is a player.
        /// </summary>
        public readonly bool IsPlayer;

        /// <summary>
        /// Gets the registered hit position.
        /// </summary>
        public readonly Vector2 HitPosition;

        /// <summary>
        /// Gets the explosion hit type.
        /// </summary>
        public readonly ExplosionHitType HitType;

        /// <summary>
        /// Gets the taken damage caused by the explosion after modifiers and distance to the center.
        /// </summary>
        public readonly float Damage;

        /// <summary>
        /// Gets the explosion force direction vector.
        /// </summary>
        public readonly Vector2 ForceDirection;

        /// <summary>
        /// The explosion impact percentage power in the range [0.0 - 1.0]
        /// </summary>
        public readonly float ImpactPercentage;
    }

    /// <summary>
    /// Explosion hit type
    /// </summary>
    public enum ExplosionHitType 
    {
        /// <summary>
        /// 0, None. Explosion doesn't affect the object.
        /// </summary>
        None = 0,

        /// <summary>
        /// 1, Damage. Explosion affects the object directly, causing damage.
        /// </summary>
        Damage = 1,

        /// <summary>
        /// 2, Shockwave. Explosion affects the object but doesn't damage it (maybe it's behind something blocking the explosion).
        /// </summary>
        Shockwave = 2
    }