Why I was asking all that questions?

Before I was not really interested in how time_step is working. It was working and that was enough for me.

Until I tried the spider script from the old aums:

spider_speed.x = 8 * time_step;
spider_speed.y = 0;
spider_speed.z = 0;
spider_speed *= time_step; // *


The interesting thing is, that the spider would have the double speed with 30 fps than with 60 fps.

And I know it is the 4th line *

But I don't understand why. It is working fine if I delete this line and change the speed. But I ask myself why this line is included in the script.



Now I have also a question about waiting some frames. Not for particles, only for a break of 4 frames.

For example I wanna wait(4); at 60 fps.

But only wait(2); with 30 fps.

What would be the best solution for that?
Something like wait(3.75 * time_step *4)? Because time_step * 3.75 would be 1.

Sorry for the stupid questions. I only wanna understand the complete process.