Allow jumping only when entity stands on something

[Doidel]

Hi

My player is able to jump. Yet I want him to only be able to jump if he stands on something, so he doesn't jump in mid-air.
I thought about using collision detection, but if the player just walks over a cliff there's no "noticing" that he's mid-air. Another thought was to use

object._physijs.touches

I could iterate through all touched objects, figure out the contact normal (how? no clue) and like this determine whether he's standing on something or not.

Does someone have a good idea on how to do this? Any suggestions would definitely be appreciated!

Kind regards,
Doidel

[chandlerprall]

Contact normal would need to be added to the collisions report. That's an important part of responding to collisions and should be added.

[Doidel]

heh, I agree ^^
how about looping through the "touches" how I mentioned before. You know anything that speaks against this..?

[chandlerprall]

That's how I would do it. Depending on your set up you may be able to fake the contact normal by checking if the player is above the platform or not.

[Doidel]

Right, I'll give it a shot. Faking it won't be possible, the level's too complex for that (too many objects).
Thanks for the help!

[Doidel]

Hmm touches won't really work, I need that contact normal... if I e.g. have a terrain I can barely figure out whether the player stands upon it or is in the air. Can you drop a message here when you added that contact normal? That'd be neat.. thanks in advance :)

[Doidel]

Is that contact normal available by now..?

[chandlerprall]

Can't believe it's already been 3 weeks... I'll get this pushed out tonight.

[Doidel]

Awesome, thanks!

[chandlerprall]

Wiki Collisions page updated with the new contact_normal parameter in the collision callback.