33 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.

[weapon121]

Hello!

I was just wondering what variable would have to be changed in order to place the grid somewhere other than the default one? For instance if I wanted to place a 200* 200 grid in the lower right corner.

Thx in advance

 

Alex

[chestertagat]

[Trinnexx]

Neat example, I love seeing things like this with GML.
The movement seems localized to where it originates from, I'd love to learn how to make motion pass on to other points and 'ripple' out.