FSO.Vitaboy.Animator.RenderFrame C# (CSharp) Method

        public static AnimationStatus RenderFrame(Avatar avatar, Animation animation, int frame, float fraction, float weight)
        {
            bool completed = (frame < 0 || frame > animation.NumFrames);
            frame = Math.Max(Math.Min(frame, animation.NumFrames), 0);

            var numDone = 0;

            foreach (var motion in animation.Motions)
            {
                var bone = avatar.Skeleton.GetBone(motion.BoneName);
                if (bone == null) continue; //fixes bugs with missing bones.. need to find out what R_FINGERPOLY0 is though.

                var motionFrame = frame;
                if (frame >= motion.FrameCount)
                {
                    numDone++;
                    motionFrame = (int)motion.FrameCount - 1;
                }

                if (motion.HasTranslation)
                {
                    Vector3 trans;
                    if (fraction >= 0)
                    {
                        var trans1 = animation.Translations[motion.FirstTranslationIndex + motionFrame];
                        var trans2 = (frame + 1 >= motion.FrameCount) ? trans1 : animation.Translations[motion.FirstTranslationIndex + motionFrame+1];
                        trans = Vector3.Lerp(trans1, trans2, fraction);
                    }
                    else
                    {
                        trans = animation.Translations[motion.FirstTranslationIndex + motionFrame];
                    }
                    if (weight == 1) bone.Translation = trans;
                    else bone.Translation = Vector3.Lerp(bone.Translation, trans, weight);
                }
                if (motion.HasRotation)
                {
                    Quaternion quat;
                    if (fraction >= 0)
                    {
                        var quat1 = animation.Rotations[motion.FirstRotationIndex + motionFrame];
                        var quat2 = (frame + 1 >= motion.FrameCount) ? quat1 : animation.Rotations[motion.FirstRotationIndex + motionFrame + 1];
                        quat = Quaternion.Slerp(quat1, quat2, fraction);
                    }
                    else
                    {
                        quat = animation.Rotations[motion.FirstRotationIndex + motionFrame];
                    }
                    if (weight == 1) bone.Rotation = quat;
                    else bone.Rotation = Quaternion.Slerp(bone.Rotation, quat, weight);
                }
            }

            if (completed || frame+1 > animation.NumFrames) return AnimationStatus.COMPLETED;
            return AnimationStatus.IN_PROGRESS;
        }