How do I make enemy knockback?

Hi,

I need to make my enemy be knocked back when it is on collision with the character, I can make the enemy knock back through the bullet behavior, but when it falls down, the enemy should stop falling down on the ground, but it not work use the enemy's y position to set gravity. please help, thanks

file: https://www.dropbox.com/s/yupvnkgy8kr7yk5/2.capx?dl=0

Try adding the "Behaviors" > "Solid" attribute to the ground sprite.

gumshoe2029 it's not work to add solid

Did you add solid to the sprite itself too?

gumshoe2029 add solid to sprite still the same

gumshoe2029 it's not work to add solid

After adding the solid behavior to the ground tiles, try setting Bounce off solids to Yes on the treasureFlower. Still, I don't think this gives the expected result.

It looks like this might be a job better handled by the Platform behavior instead of the Bullet one. I'll post a modified .capx shortly.

EDIT:

Updated .capx: bit.ly/1BOJlWg

(Looks like I can't properly post URLs yet)

mrsocial99mfine thanks, your solution is perfect, thank you so much

mrsocial99mfine i got another problem when I add continuously moving background, the knock back method till work fine, but when the ground move to the second 0(I have draw 0 on the tilebackground), the treasureFlower disappear, and keep disappear when it move to the 0 position, please help, thanks

new file: https://www.dropbox.com/s/dlji5tb8dp0q1 ... .capx?dl=0

It looks like when the highlighted line runs, the ground shifts right?

When this happens, you'll find that if the treasureFlower is on the floor then it will shift along with the the ground tiles. However, if treasureFlower isn't on the floor (i.e., it is in the air being knocked back) then it will stay where it's at while the ground shifts to x=0.

One way to solve this would be to remove the Solid behavior from the current TiledBackground and then add another sprite to act like the real ground and make it

• Invisible
• Stationary and
• Have the Solid behavior

I've went ahead and did this already bit.ly/1eW6qwf but you'll have to decide whether this works for the rest of your game.

mrsocial99mfine cool, thanks