How do you use the Interpolation Curve in MMD? What does the Interpolation Curve do in MMD? What is the purpose of the
Using the Interpolation Curve in MikuMikuDance.
Remember in Math class when you studied graphing and you had to plot and connect your answers on a grid? You didn’t know it, but you were interpolating your answers. Interpolation, in MMD, is showing the relational change in movement between
You read MikuMikuDance’s Interpolation Curve (IC) from left to right. You can adjust the curve by grabbing the two red “X’s” and changing the shape. What the curve does is to distribute the velocity of the movement. This is all done within the frames you have selected in the Frame Manipulation Panel. The diagonal line shows that the speed dispersed evenly throughout the movement. A plateau shows a pause or slowing of the motion. Peaks and valleys denote a sharp increase or decrease in speed and location of the movement.
I created motion data showing a simple slide across the field. I’ve loaded 5 beach balls and given them the exact same motion data. Using the Interpolation Curve will create some radically different effects to the motion data. These are, by far, the most extreme examples of using the Interpolation Curve. Remember, this is only a demonstration- So please no wagering.
This will be the fastest interpolation out of all the examples. The ball shoots out ahead and then eases slowly toward the end. This starts out with a peak and then the curve flattens out.
Notice how differently each of these balls move according to the changes made to the Interpolation Curve. Yet, they all end the motion almost simultaneously. An important distinction to remember is that no matter what you do using the IC the motion data itself is unchanged. Knowing this, you can tweak all your motion data using the other Y and Z axes and create more fluid and realistic motions.
You can switch between axes by using the arrow button. You have X, Y, and Z axes; rotation, distance, view angle and all. The auto adjust resets all your changes. This is good if you just want to “audition” a change using the Interpolation Curve without committing. Otherwise, it seems to be more of a nuisance than a help. Load up a model and create some motion data and play around with Interpolation Curve. You do have to set the IC selection field to “all” or the axis you are working on. “Rotation” is the default setting. Don’t forget to play with the other axes.
A slight S-curve is, by far, the most commonly used curve in MikuMikuDance. However, most things in nature move with sudden starts and jerks. So, prudent use of the Interpolation Curve can take your animation to another level.
Credits: Beach ball by Bolloz111.
Have fun with this.
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