How to make bottom of platform hollow

Hi,

How would i make the bottom of a platform hollow? an example of this is from the mobile game doodle jump, so you can jump through the platform if you are coming from below, but as soon as you land from above you hit a collision so that you don’t end up falling through again.

thanks for any feedback!

Hi,

Just a thought out of the blue… :
Have the platform collision off. Place a trigger volume above the platform. Once the player enters it, activate the collision of the platform.

Cheers,
Klaus

Would this slow performance? i also want to animate the platforms, and so i would have to animate the trigger volumes along with it in this case, i thought maybe there might be a cleaner way to do it, for example, create a collision that is hollow on one side of the face, and not hollow on the other, similar to how 3d modeling software allows you to view one side of a face whilst leaving the other side transparent.

Thanks for your input, i will give that a try now, but still interested in reading alternative ways of doing this.

Hmm,

also out of the blue…:
If you make the platform mesh and the trigger volume as a class blueprint (not using the level blueprint), you should be able to move it around and the trigger volume will always be placed correctly.
What appears “unclean” to you with this approach?

Hi KVogler,

That sounds like a great idea, initially i was hoping it could all be done via collision settings entirely so i wouldn’t have to deal with trigger volumes, i thought this would maybe be unnecessary (messy), if the other way i thought were possible, however setting it up as a class blueprint seems like the ideal way to go and will work just great.

thanks for your help!