30 replies to this topic

[teej]

Nice effect, it could be useful for something.

[ninja_x]

Awesome effect! I was able to make a distorting bomb shock-wave, something I've wanted to do for a while now, by combining this with background_create_from_screen().
Views were tricky until I figured out to draw the grid at (view_xview,view_yview) and to create the explosion effect at (-view_xview,-v_yview)

One suggestion:
in eg_explode there's the line:

eg_vx[a0,i]+=(eg_dsx[a0,i]+lengthdir_x(dist,dir)-eg_dx[a0,i])/5;
eg_vy[a0,i]+=(eg_dsy[a0,i]+lengthdir_y(dist,dir)-eg_dy[a0,i])/5;

Since "5" here is effectively the damping of the effect, maybe you should include it as an argument? (The argument would stored into a variable before the loop of course, and that variable would be used in the loop rather than referring to the argument for the sake of performance, of course.)

[Dark Matter]

(The argument would stored into a variable before the loop of course, and that variable would be used in the loop rather than referring to the argument for the sake of performance, of course.)

I think "argumentn" is going to be just as quick as "var n; n = argumentn".

[ninja_x]

(The argument would stored into a variable before the loop of course, and that variable would be used in the loop rather than referring to the argument for the sake of performance, of course.)

I think "argumentn" is going to be just as quick as "var n; n = argumentn".

Oh, my bad. I always kind of assumed "argument" was slower since it was passing the value by reference every time or something, but now that I think about it I don't really know why I assumed that.

[xot]

In my experience, using argument is generally faster than using a temporary variable. For cases where the variable is accessed many times (in a loop, for instance) the difference can be significant. GM8.1 has made some changes to argument handling and it is possible this is no longer be the case.

[vertex67]

wow, this is soo much better than the first version (which i have been using in my WIP for the past year).
The velocity variables, eg_vx and eg_vy were not declared in the create script, so it threw errors until i added them, but seriously, amazing work!

btw, I was able to implement a very nice ripple effect by layering an implode on top of an explode, with the implode radius a bit smaller.

[deluksic]

Realy good engine.. I see u used startx and y variables to move dots back in place, but what if u use relative position of other dots that are conected... u'd get a wave effect wich would be cooler than this... i cant use your engine cause i dont realy understand it well but u could rewrite it in this way and show us the result!

[Osmium]

Nice example! Might look a little pixelated at times but still amazing.

[lolmister]

This looks amazing, but sadly since i have a mac I cannot use it... im just wondering what is done in the draw event. Im trying to do a similar distortion effect, but im having problems. So if I could see an example it could help clear things up for me.

Edited by lolmister, 22 February 2012 - 06:23 PM.

[thecatlover1996]

*bump* ^^

I was wondering if there would be a possiblity to have this distortion effect on the surface of the game itself, not just a background or a created surface.
I've tried some things, but it works quite slow and I was wondering if someone has done this already?

[Dark Matter]

*bump* ^^

I was wondering if there would be a possiblity to have this distortion effect on the surface of the game itself, not just a background or a created surface.
I've tried some things, but it works quite slow and I was wondering if someone has done this already?

Yep. All you have to do is draw everything on to a surface instead of using the standard draw event, and use that as the distortion surface.