Brow + Head tilt reactive ears || Live2D model tutorial/tips
Hello hello today imma bring a small new explanation this is one I've seen alot in more fancy models but never seen like a tutorial or explanation (hell finding out how from better rig makers was like pulling teeth)
what I'm talking about is having the ears on a character or pieces react to the eyebrows plus the head tilt all in one
So let's get started :3
I showed above what I did to make the ears and wings on this new model react to both movements but I'll also explain for those curious who would prefer to read over just looking and copying
I'll be explaining it for what I have since I use a web camera this is more simplified but can be used for more parameters
You'll need at least 4 base parameters
Your movements which in my case one brow movement (the tracking your brow up and down) and angle z (head tilt)
Then your ear/item movement on each side (have your left and right seperate-) you can seperate each ear/item like I did (such as having my wings and ears seperate)
I have a deform labeling what it is then the base parameters movement ontop labeled flop as my movement, to make the movement easier without rotation deformers (as these can be very picky)
You can hold ctrl (control) on your keyboard and move the deformer/red box
I place it near the base of the ear/item then rotate it by holding the corner giving me the option to rotate back and forth, you can then apply the end frames as how far you want
Please note deformers like this when rotated and pushed to far without the proper techniques will squish and distort the image/art, so do not push the rotation very far
Once you have all your movements done you can go into your physics settings/physics window which is where you'll make this movement happen, this is also the same place any physics are done (such as bouncy hair to eye effects etc)
next to duplicate press add to make a new physics group and label this group as whatever side of ear movement your doing, for this I'll be explaining the right as the one you see
Your input settings which I'm tabbed on is where your movement is, basically what is the beggining movement to cause the effect, which in this case what are my ear movements tracking??
For me in particular I have angle Z and browL Y, so you press add above the both then add those two parameters in, please note effectiveness can only react a max of 100 overall per angle (or position) so I've split it down an even 50/50
Next is normalization of input, this is what you need to edit to make the ears react the way they do
If you do not edit this your ears will react like a normal physic and not move the way you want it to
Since our type of input is angle we are editing the angle option in this, and setting it to minimum of -90 and maximum of 90
Normalization of input is basically the programs version of gravity, it's what tells your program where 0 is on your physics engine and reacting accordingly
Next is our output setting and physics model (aka the pendulum)
You will want your output as your item/ear flop/movement, but if you move it after adding this you'll see it's not reacting so you needed to add a pendulum point
Bellow pendulum setting pressing add, adds a point to the pendulum, and the NO (such as 1) is what number the blue dot is in the preview
To go over the basics
Duration- how long
Shaking influence- how much the point shakes when moved
Reaction time- how fast it reacts to a movement
Overall acceleration- how fast it moves after a movement
For this I set my duration to 15, since I don't want alot of shake/wiggle when the ears move I lowered the shaking influence, reaction time is 1 so it's a more simple but steady movement if you wish for the ears to move faster when you tracking or slower you can up or lower this, overall acceleration I keep at base 4.
This is the basis for the ear tracking
The left side is the same thing id just duplicate the group you just did change out the ear output for the other side parameters
If own of the angles is reacting the wrong way (such as opposite direction you want) you can in your input setting press reflect which will make it move the opposite direction output wise for that parameter movement
Thank you all so much for reading
Honestly these explanations are really fun to do and gives me a long time to yap and help people with issues I ran into myself- I kinda hope maybe this will help someone in the future who was just as stuck as me
