HumanoidRetargeter/Core/Formats/Fbx/FbxAnimCurveNode.cs
Represents an FBX animation curve node that targets one transform property and can hold up to three axis channel curves (X/Y/Z). It exposes the underlying FbxObject, a dictionary of channel FbxAnimCurve instances, and a Component method to sample a single axis value from a connected curve, a stored default property (d|X style) or a provided fallback.
File Access
#nullable enable annotations
using System;
using System.Collections.Generic;
using System.Numerics;
namespace HumanoidRetargeter.Core.Formats.Fbx;
using Vector3 = System.Numerics.Vector3; // s&box compat: shadow engine's global-namespace Vector3 (see Code/HumanoidRetargeter/Assembly.cs)
/// <summary>
/// An AnimationCurveNode: up to three channel curves (X/Y/Z) targeting one transform
/// property (<c>"Lcl Translation"</c> / <c>"Lcl Rotation"</c> / <c>"Lcl Scaling"</c>) of one Model.
/// </summary>
public sealed class FbxAnimCurveNode
{
/// <summary>The curve node object.</summary>
public FbxObject Object { get; }
/// <summary>Channel curves by axis ('X'/'Y'/'Z'), from <c>"d|X"</c>-style OP connections.</summary>
public Dictionary<char, FbxAnimCurve> Channels { get; } = new();
internal FbxAnimCurveNode(FbxObject obj) => Object = obj;
/// <summary>
/// Samples one component: the channel curve when connected, else the curve node's static
/// <c>d|X</c> default, else <paramref name="fallback"/> (the model's Lcl value).
/// </summary>
public float Component(char axis, long ticks, float fallback)
{
if (Channels.TryGetValue(axis, out var curve))
return curve.Evaluate(ticks);
if (Object.Properties.TryGetValue("d|" + axis, out var def) && def.Values.Count > 0)
return (float)def.GetDouble();
return fallback;
}
}