The Powder Toy

I thought all elements had an update function but it seems that METL (and quite a few others too) doesn't. If I want change METL's update routine, how do I change it. Do I have to make a co...

I have posted in bold on part of the wiki where there seems to be a lack of info on the PMAP command.  https://powdertoy.co.uk/Wiki/W/Variables.html#General  Please provide the requested inf...

Thanks for the info.

I really like the way that electrons move. Photons are limited in initial direction of movement. Neutrons have not only initial random direction selection, but also initial speed selection, and even ...

Why isn't this code working?  int update_TEST(UPDATE_FUNC_ARGS) {  if (parts[i].tmp==0) {  parts[i].vx=(rand()%21-10);  parts[i].vy=sqrt(100-(abs(parts[i].vx...

This program I made in VB6 shows everything you need to make an element. It even has some default values for properties and transitions filled out for you so it will be easy to make your own elements...

Does Rand always give an integer value or does it sometimes give a value with decimal (float or double type value) like 5.43582?

I want to know how to do random numbers in C. Is there a specific random command? Is it math.random like in Lua?

2 things, does the word "double" have to be in parenthethis for this?    Also I just accidentally selected the wrong section, I meant it to go in the development help section. Why...

This C code is supposed to make the element go from black to almost white as you draw it from left to right. Yet it stays black no matter where it is. For some odd reason the "floor" functi...