The Powder Toy

NDR149

I'm working on a custom element (liquid), it needs to be able to check exclusively for solids and powders as part of its update function. That way it doesn't try to react with itself or with gases. Can this be coded for in Lua?

jacob2

Yes. You can use but.band(elem.property(<other element ID>, "Properties"), elem.TYPE_POWDER) ~= 0

Maybe, I'm on a phone so can't test

NDR149

@jacob2 (View Post)

Thank you. What to I replace "<other element id>" with?

jacob2

@NDR149 (View Post)
Whatever the type of the other element is. I don't know how your code is formatted, if you have a nearby particle id in 'r', then it would be sim.partProperty(r, sim.FIELD_TYPE)

NDR149

@jacob2 (View Post)

Wait a second. You were right to think you should test it first. I'd need to replace "elem.TYPE_POWDER" with some kind of or function, plus the bitwise operator might be too picky with neighboring elements. Unless I'm isreading the code, which is totally possible since I'm a potato. Can you show me how to actually use the code you provided?

TPT_PL

@jacob2 (View Post)
@NDR149 (View Post)
Oh, I just found an error in jacob's code. It should be:
bit.band(elem.property(, "Properties"), elem.TYPE_PART) ~= 0
Notice that it isn't but.band, but bit.band and it also isn't elem.TYPE_POWDER, but elem.TYPE_PART

jacob2

@NDR149 (View Post)
If I remember, I'll write some example usage when I'm home

@TPT_PL (View Post)
Oops, phone keyboard.

NDR149

@jacob2 (View Post)

Nevermind, TPT_PL and I figured it out.

Check for Solids/Powders in Lua?