Archive 17/01/2023.

Animation events?

smellymumbler

Is it possible to create some sort of “event” that triggers from a specific point in an animation playback? I’m trying to tie a “footstep” sound to the moment that the foot touches the ground.

Sinoid

See AnimationTriggerPoint and Animation::AddTrigger (Animation.h).

weitjong

NinjaSnowWar shows how to do that.

github.com

urho3d/Urho3D/blob/master/bin/Data/Scripts/NinjaSnowWar/FootSteps.as

class FootSteps : ScriptObject
{
    void Start()
    {
        // Subscribe to animation triggers, which are sent by the AnimatedModel's node (same as our node)
        SubscribeToEvent(node, "AnimationTrigger", "HandleAnimationTrigger");
    }

    void HandleAnimationTrigger(StringHash eventType, VariantMap& eventData)
    {
        AnimatedModel@ model = node.GetComponent("AnimatedModel");
        AnimationState@ state = model.animationStates[eventData["Name"].GetString()];
        if (state is null)
            return;

        // If the animation is blended with sufficient weight, instantiate a local particle effect for the footstep.
        // The trigger data (string) tells the bone scenenode to use. Note: called on both client and server
        if (state.weight > 0.5f)
        {
            Node@ bone = node.GetChild(eventData["Data"].GetString(), true);

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smellymumbler

Thank you so much, guys! I swear I couldn’t find this in the docs.