simple water by shinkan

Hi,

I am new to construct 2. I came across an old post of how to create water in construct 2 by Shinkan.

https://www.scirra.com/tutorials/1124/s ... ter-plugin

so I thought of trying out some modifications to get a boat on the surface just to see how this works with physics. Basically I connected all the waterControls with sprite instances, applied physics behavior to them along with the boat. Everything seemed to be working well until this crash with the following error message:

https://www.dropbox.com/s/n4tpouyhog9zz ... e.JPG?dl=0

I'm not sure what those error messages were saying but it seems like they were referring to construct 2 physics error? Anyways here's the capx. Thanks in advance for taking the time to check this out.

https://www.dropbox.com/sh/c4t264eozkz1 ... ZNCLa?dl=0

Out of interest, is that with box2d web or asm.js?

I see you went a step ahead of me when I was playing with it. For all my tests I've been just adding sine behavior for all my ships xD

Anyways, I run your capx with few different settings and never got this error message. And just to let you know, Canvas+WebGL don't work so great (one of the reasons I abandoned that project) but good luck!

donutpond

I remember having a lot of fun with the capx shinkan made way back then. I tried to make the waves look a little rounder, and I wanted to make splashes too, so I ended up adapting some formulas I found somewhere. It worked well on my desktop, but I was disappointed with the performance on my iPhone... I meant to post a link back on the original thread but never did.

To have things float in the water, I have a row of invisible sprites with the solid behavior - they get updated to the water's surface (minus an offset to make things look partially submerged).

Press space bar to make waves, or click the mouse to make a splash. The beach ball has the platform behavior so you can move it around with the arrow keys. (Flushing drains the water, then it fills up again)

try it out here: http://www.rieperts.com/games/Water

you can get the capx here: http://www.rieperts.com/games/forum/water.capx

Colludium

oh my, I think you just fixed the crashing issue, I was using box2d asm.js for the physics engine. After switching to box2d web, the crashes stopped! I have no idea what's the difference between the 2 engines, but they seem to look and perform the same (by eyeballing).

shinkan

thanks for the original demo. It's really awesome. I was just exploring that construct 2 can do, so was fiddling with various tutorials and plugins.

AllanR

that's a pretty awesome adaptation you got there! I have no coding experience, your capx looks really impressive. Looks more like actual C code than construct 2 lol. I tried it on my mobile and indeed the performance is super sluggish where as it worked very smoothly on the desktop. Do you know why that is?

Aha! I had my suspicions - the asm.js physics is still rather beta and, in my opinion, may never reach full functionality because its use here depends on 3rd party updates.

Ashley says asm.js is much faster than the old Box2d web. But there are known bugs in the asm.js that cause crashes like that. Chipmunk Physics is a really good alturnative (plugin by Rojohound). It is the fastest as far as I can tell, however asm.js is more accurate in terms of simulating real physics.

I think it is sluggish on mobiles because they have much weaker GPUs and can't handle the constant flood fill that creates the water - plus in my version the subroutine that calculates the splashes and smooths out the waves is pretty cpu intensive as well. But I know it should be possible to do on mobile because Jetpack Joyride does it just fine - they must have found some way to optimize the process! : )

AllanR

Sorry for bumping old topic, but I was wondering is there any way to have multiple instances of the water and have each instance of waves behave individually from each other (without duplicating / renaming the objects and events)?