Making an actor "wiggle"

Player_E

I have a thin line that stretches across my screen. Is it possible to make the actor wiggle like a string when I touch it. I do not want the two endpoints to move at all. Just the middle.

Basically I am going for a guitar string effect. any idea on how to do this?

rebump

Only way to do so currently, if you don't want the endpoints to move and thus wiggle in an upward arc to a downward arc, would be to "animate" the strummed string. Have a couple upward arc string images (sprites) of varying arc, a straight string, and a few downward arc images and then cycle through them in an "animate" step.

If you don't mind the whole string moving (endpoints included), you can just move the Y coordinate of the string actor up and down a bit.

You could also have three or more layered and constrained actors that move up and down in the Y direction a little more than each other at each layer creating an arc but then you may have issues keeping them in sync.

rebump

You could just re-size in the Y position from a default string width to string width + 2 and then string width + 4 and then back down. Do this quickly and it would look like it is vibrating while keeping the endpoints fixed. I chose 2 and 4 to get an even stretch of the image in the Y dimension but you may want to play around a bit. Still think the "animate" method would be most realistic.

(All my info in this thread pertain to Y coordinate/position when using the current GS default of a landscape mode...not that it really matters but never know if someone may be accidently in portrait at a later date but using it in a landscape manner so then X would replace Y in that instance.)