AttachRotationTrackModifier.c

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class AttachRotationTrackModifier : CinematicTrackModifier
{
    [Attribute(defvalue:"", desc:"Entity we want be attached to")]
    string entityToAttach;
    
    vector transform[4];
    vector originalVector[4];
    ChimeraWorld chimeraWorld;
    
    override void OnInit(World world)
    {
        chimeraWorld = world;
    }
    
    override vector OnApplyModifierVector(float time, vector originalValue)
    {
        
        IEntity entity =  chimeraWorld.FindEntityByName(entityToAttach);
        
        if (!entity)
            return originalValue;
        
        entity.GetTransform(transform);
        
        Math3D.AnglesToMatrix(originalValue, originalVector);
        Math3D.MatrixMultiply4(transform, originalVector, transform);
        
        return Math3D.MatrixToAngles(transform);
    }
};