Atom Smash simulation

coderJeff · Site Admin

EDIT: All of the source mentioned in this post is available for download here: http://frontpage.execulink.com/coder/freebasic/atoms.asp

I was looking around for a module in my old qb code and I found this instead:

Blocks (made of simulated bonded atoms) are dropped from some height and smash against the ground and each other.

I made it about 6 years ago in QB. It's one of several that I did trying to simulate things like jello and dominos. Anyway, I only had to change a few lines to get it to compile and run in freebasic. (it could not have been easier).

There are some constants at the top of the program that can be tweaked to give different effects. Since the simulation is not based on any real physics, numbers don't have any real world meaning: so you will just have to play with the values. And I'm sorry if it's too fast for newer computers, there's no timing code. Maybe you can add a sleep or something in the main loop.

Download Source :atom_smash.bas 10k

I now go back to my search for what I was really looking for.

Pritchard · Guru

Can you add a feature so I can hit space or click and bounce them against each other? I really like this program.

coderJeff · Site Admin

Hmmm, looking at the code, looks like I put something like that in there. (Must have been thinking the same thing as you) Press uppercase "A" and it will give one of the atoms a jerk upward. Look in the code around line 129 where it has CASE "A" Maybe you could add some of your own CASE statements in there and play around with it.

Pritchard · Guru

Thanks ^_~

redcrab · Sr. Member

That's cool , and look so realistic .... great physic stuff

I added SCREENSYNC before "FLIP" and the motion looks even better (less nervous move)

I really like it !

coderJeff · Site Admin

screensync ... great idea, I wish I thought of that. I noticed that I was also missing a constant for the maximum speed an atom could go. (It is set to 5). So I also added that and updated the posted source. Thanks!

mambazo · Sr. Member

Brilliant!

I see the makings of a 2D Stickman Ragdoll System!!!

http://mambazo.langfordtavern.com/zips/atom_smash_lines.bas

Who's up for the challenge! :P

arenth · Sr. Member

The fact that nodes snap off is incredible, imagine using this as a ragdoll system in some side scrolling game, your guy leaps off an edge, impacts the ground, and he is dismembered...

Pritchard · Guru

coderJeff · Site Admin

2D stickmen ... Cool idea! Maybe a good way to get out aggressiveness by tossing them and squashing them with heavy virtual bricks. (Oh, nooo! who will help Mr. Bill? SPLAT!)

Some of the global constants could be coded in to the "Bonds" type so that things like body joints could have different properties from things like legs and arms. So that when dismemberment occurs, it's more likely to occur at a joint.

Here's an idea. Create a program that takes a color bitmap and converts it to an atom lattice structure, different colors could indicate different properties.

I added some of mambazo's code bits to add color to the atoms. Also, press "ESC" to exit, "R" to restart, SPACE to add random velocities.

I added a function to create a triangular shaped block, and I also re-read though my code and made a comment about how the program is supposed to work.

Link is as before: atom_smash.bas 12 k

mambazo · Sr. Member

Did anyone see that "game", where you had a 3D Stickman, and a scene (like a flight of stairs, or a truck) and you had to cause as much damage as possible to the stick man by 'pushing' his limbs?

coderJeff · Site Admin

Oh, I know what you're talking about now: http://jet.ro/dismount/
Not sure how it would work in 2D though ...

mambazo · Sr. Member

Thats the one! :P

coderJeff · Site Admin

OK, here's another version that can load a from a bitmap.

ragdoll_smash.bas 14 k
ragdoll.bmp 4 k

WARNING: Some may find this program offensive and may not be suitable for younger audiences.

mambazo · Sr. Member

EDIT: Brilliant! :P