[ad_1]
Hello,
I used to be taking part in some outdated retro video games and began questioning how did they do it again then. There the place shootemups video games the place you actually had lots of of bullets flying across the display. And any of them may kill you.
I’ve been studying some cocos books (outdated however nonetheless legitimate I assume), and evidently the logic is to retailer all of the bulllets on display in a ccArray and within the replace technique you do a CCARRAY_FOREACH (which i assume in cocos3dx 4.0 is now CCARRAYDATA_FOREACH).
So in case you have say, 200 bullets, and the sport is 60 fps, it signifies that the replace technique is checking 12000 intersections per second!! + all the pieces else in your sport logic.
I come from a CGI background the place you progress meshes with thousents of vertices per second ar 24 fps, which is type of regular. So I’m wondering, being new into sport growth, if 12000 intersection checks per seconds is loopy or is doable.
thanks,
R
okay, I’ve been studying abit on the subject and evidently one of the best ways to do it’s to make use of a pool and sphere colliders (apparently sooner than field colliders). So insteand of instanciating and destroying all of the bullets,
they’re created suddenly off display, after which simply transfer round and reposition out of display when not wanted.
1 Like
Hi there, I feel they’d of simply examine the space from and object to object,
not all of the factors of a physics object in an engine.
Example code.
float diffY = p1.y – p2.y;
float diffX = p1.x – p2.x;
return sqrt((diffY * diffY) + (diffX * diffX));
then if the space is much less then say 2 then collide, however again within the day it might of additionally been Assembly language.
That’s is fascinating(You can avoid wasting efficiency although with out making use of the sq. root)
My concern was extra about creating the sprites cases than the collisions. Instead of making and destroying the sprites cases, they will all be created without delay off display at loading time, after which simply transfer then round. For occasion, when colliding, as an alternative of destroying the sprite and creating a brand new one once more, simply transfer it again off display till you want it.
I do one thing comparable with some background clouds. Create as soon as, and as soon as they go away the display, set the place out once more and restart.
Yes thats the enjoyable half about video games programming, you make it up as you go alongside optimisation is vital, however keep in mind it’s all pretend so when your swimming in water your probably not it’s simply graphics, however just like the matrix “Your mind makes it real”, I discover it enjoyable programming and animation, it’s like a superb outdated cartoon it’s left to your creativeness.
We use many tips like hiding issues off display or as a result of cocos makes use of nodes you possibly can simply present or cover node that tells the engine if its is to be drawn, utilizing one participant and altering the colure so it appears to be like like many various gamers to save lots of reminiscence or tile maps reuse the identical tiles to create an infinite scrolling map that was the arcades favour trick if you happen to performed MAME earlier than you possibly can see they rotate pallets and use tiles and all types of trick’s to create the phantasm. Cocos2x can pull off all these tips and them some, “On steroids”, the extra you get into it the extra enjoyable cocos is. I don’t know if you happen to program in any respect or if you happen to do or begin studying this can be a actual enjoyable engine to play with a lot of assistance on right here the admins on listed below are incredible at serving to out too they actually helped me with my ip & pictures this was one thing I neglected and so they picked up on good. anyway get pleasure from and have enjoyable.
sure, I’ve been a software program dev for the final 15 years. I take advantage of to work within the movie CGI business the place I wrote rigging software program in python and C++ plugins when heavy realtime computation the place required.
I just lately swap to the sport business (bought a bit burned from working in large movies studios).
This the sport I at the moment growing
It is small sport that I’m utilizing as a “workshop” for future extra critical and lengthy video games.
Hay thats superior is there an finish boss? jogs my memory of – R TYPE beloved that sport. is it working on Android or IOS appears to be like like its on home windows?
Make me need to write one now ought to solely take about 20 minutes with this engine
[ad_2]