[Question] Altering player physic via items

[Emetchi]

In the past two months, I have been having a blast making my own mod (which I hope to finalize and release eventually) using google, some discord friends, and Rubenwardy's book (huge thanks to him for that) as guides. This is my first project related to coding other than a class I'm taking in JS, so I hope you can excuse a little lack of knowledge on my part.

Anyway, my question is, how (if possible) would I go about creating items that can be used to alter player physics using the API? (ie, craftitem that the player can click to set gravity to a certain value)

Any help is appreciated (especially code snippets, because it helps to copy working code and mess around with it)

[GreenXenith]

By the way, this belongs here viewforum.php?f=47 :P

The lua_api is a handy thing ;)

Anywhos, line 3730-3740 says this:

Code: Select all

* `set_physics_override(override_table)`
    * `override_table` is a table with the following fields:
        * `speed`: multiplier to default walking speed value (default: `1`)
        * `jump`: multiplier to default jump value (default: `1`)
        * `gravity`: multiplier to default gravity value (default: `1`)
        * `sneak`: whether player can sneak (default: `true`)
        * `sneak_glitch`: whether player can use the new move code replications
          of the old sneak side-effects: sneak ladders and 2 node sneak jump
          (default: `false`)
        * `new_move`: use new move/sneak code. When `false` the exact old code
          is used for the specific old sneak behaviour (default: `true`)

So if you wanted to do something with an item, you would do something like

Code: Select all

minetest.register_craftitem("mymod:jumpything", {
	description = "use to jump higher",
	inventory_image = "default_stick.png",
	on_use = function(user)
		user:set_physics_override("gravity",2) --this part is wrong. I dont know how to do it properly - just mess around with it.
	end,
})

[Pyrollo]

It's even better to use Player Effects Framework (see this forum post).

Player effects handles concurent effects from different mods. If your mod modifies player physics using the API and another mod does this also in the same time, this may lead to unwanted situations.

[Emetchi]

Thanks for the tips! Going to work on the mod later today, hopefully everything will work!

edit: still haven't gotten things to work

[Emetchi]

Anyone have anything else I can try?

[Byakuren]

Anyone have anything else I can try?

What's blocking you?

[Emetchi]

Anyone have anything else I can try?

What's blocking you?

I tried a bunch of version of the code given, and they all crashed the game. My guess is that it tries to execute the playereffect command but the player username has not been property acquired.

[Byakuren]

What was the error? What was your (full) code?

[paramat]

Maybe

Code: Select all

user:set_physics_override({speed = 2, jump = 2, gravity = 0.5})

?
Do post the whole error message.