A fast, easy to use, free, and community supported 2D game engine
vutronic
Member
Hey all, here is a sneak preview of a physics side scrolling game I've been working on forever. My last 3 iphone games were really bad and I've removed most of them from the app store. I wanted spend more effort on this one. What do you think? Thanks.
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looks really good! has a locoroco kind of feeling... seems to be quite good :) Keep it up!
vutronic
Member
Sunsu, correct. I use external xml files to store the terrain coordinates. cp segment shapes are genereated based on the coordinates. To speed up development I built a custom game level editor with Flex so I could easily tweak and make new terrains.
Ob1, I use the Iphone's accelometer to control the av.
Looks really good. I think you need to do some tweaking of the physics though. The way I imagine it is almost exactly how JellyCar is with their car physics.
Also, I've done loading of terrains and CPSegs using an XML, I don't remember how let me dig it up and if I find it I'll post.
I have one more question:
You generate your whole level map at loading time, correct? How do you move the layer? you use camera? or seperate layers for movement??
I'm trying to achieve something similar to the movement of the scene according to the vechile's position...
Could you share a bit about your technique for moving/manipulating your map?
Much appreciated, Natanavra.
vutronic
Member
Natanavra,
You're correct the map for each mission is built at runtime. I have a seperate layer for movement like you said. The terrain for each mission is about 5000 px wide I can go up to 10,000 px too. First, I create the cp segment shapes for collision detection and then I build out the terrain graphics using cocos2d. For example, if the terrain is 5000 px wide, I load 5 1000x320 graphic slices and align the graphic slices in my game layer to match the cp segment shapes. The background is just another layer I put behind the game layer.
For scrolling the map I simply move the entire game layer( 5000 px wide ) by calling the setPosition method in every step based on the x position of the vehicle. Here's what I use
CGPoint tempPos = [ self position ];
[ self setPosition:ccp( -(chassis->p.x- xScrollOffset ), tempPos.y ) ];
I haven't tried using the camera.
Very interesting, you render huge textures and with an amazing FPS, I think I might go for your method, kina cool - setting layer center to vechile position... I had a huge algorithm creation in my head for side scrolling according to a char.
Thank you very much!!
This looks really good! I can imagine a lot of cool possibilities with this sort of a game. You could have different cars with different characteristics and what not. But even now I like the graphics and seems like the gameplay will be fun!
vutronic
Member
Natavra, Yeah I'm surprised at the FPS( 55 - 60 ) I'm getting in my game too with all the particle explosions, actions and large graphics. I'm using [Director useFastDirector] otherwise the frame rate will drop to around 30 fps.
Thanks plasticpower, I might add power ups to increase the car's performance if there's time. Maybe in version 2. I've spent over a month with this already. I just don't think it's a good business sense for anyone to spend this long building an iphone game:) I'm just doing this for fun.
vutronic
Member
Here is another video capture of my game. This one is quite long. At the end you see some "stick aliens" I just added inspired by stickwars. :)
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I've being thinking a bit about your game and analyzing the game ( I mean for fun, I love thinking how games work)
So... you vechile is one body while the wheels are 2 other bodies attached with joints, correct?
One question if you don't mind, how do turn the wheels? does the vechile by wheel friction?
Thank you for taking the time answering my questions, I am just a young curious "dev".
~ Natanavra
vutronic
Member
Natanavra, vehicle is made of one poly shape and two circle shapes. They're joint by cpPinJoint. To move the vehicle I either set the torque of the left wheel or the right wheel.
Codemattic, a month seems kinda long to me for a small game. This game is only about 80% complete at the moment. BTW, I haven't heard you announce any game yet. How long does it take you to develop an Iphone game??:)
One month heh. I have been making my game for close to 5 months now. If I could deliver something like that in a month or even two months I'd be extremely excited.
Awesome! I'm really digging the particle effects, great explosions.
vutronic
Member
Thanks all, this is my 4th iphone game, so I reused a lot of code from my previous games. I'm trying to build a nice reusable framework for building chipmunk/cocos2d games. DectectiveCakes, if you're curious, search for a discussion by Zommbie and Adrian regarding a technique for creating reusable particle systems. That's what I'm using..very nice stuff.
vutronic
Member
Oops ..Conor not Adrian,
http://www.cocos2d-iphone.org/forum/topic/177/page/2#post-4779
I think with the "angular you're dead sign" he meant to say that your game mostly consists of sharp shapes with angles, and the smooth pop-up is not consistent with the rest of the game. Though, I'm sure you'll polish things up when the game is done, I tend to agree that the "game over" screen should probably be a design with more angles in it.
With that said, major kudos if you're doing the graphics yourself. Other than the "game over" popup, it looks very good and consistent across the board! And I like the choice of colors. Definitely looks like a feature game in the making.
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