As my actor moves, have it go slightly up and down

daverenner

i have actors that automatically move across the screen. How can i have it so they kinda move up and down sorta like a sine wave?

StusApps

Easy if they don't move up and down (this example will only work for characters that move in a straight left or right line) and this doesn't use any timers.

when RIGHT = true (or whatever tells your character to move right).

RULE - if self.positionY=120 (characters height on screen)

interpolate self.positionY to 123 - Linear
duration 0.1

RULE - if self.positionY=123

interpolate self.positionY to 120 - Linear
duration 0.1

Change the amount and duration for the effect you need..

daverenner

Man i love the GS forums! Everyone is so helpful. I will try that out Stu.

AfterBurnett

Or you could do it with "move" using angles under the same rules Stu has pointed out when y = 120, move diagonally down... when y = 100, move diagonally up.... Not sure which is heavier on the processor though...

StusApps

not sure how good my solution would be for a moving actor, should be fine going along a single Y line, but not for anything else. I only used it to make a fish look like it's bobbing up and down in the water, but the fish was still at that point.

AfterBurnett

Would the interpolate behaviour override the move rule?

scitunes

there is a spot in the wiki on sin movement