Processing 1.0 - Processing Discourse - Space Battles Mini-Game

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Space Battles Mini-Game (Read 3288 times)

Markavian

Space Battles Mini-Game
May 4^th, 2005, 7:52am

EDIT: This post was previously called Draw Points To Target.

Finally! I've figured it out...

This may have taken me many years to figure out, long since my first attempt at adding AI to a computer game version of Asteroids... but here is something -

Draw Points To Target
http://mkv25.net/?item_id=99

A function that will try and turn the shortest distance towards a target and move towards it. Very useful for plotting routes. I finally worked out a (stable?) system that works for all angles. I've always had trouble around the 360 - 0 angle, where my code has been unsure which way to turn.

Please take a look at the code and see if you can think of ways to improve the logic. I'm sure you can see the aim - start off facing in a direction (vertically down) and then turn and step forwards towards the target (mouseX, mouseY) until the target is reached.

I intend to use this logic to build a simple space battles game.

« Last Edit: May 14^th, 2005, 6:41am by Markavian »

otomo YaBB Newbies Offline Posts: 16	Re: Draw Points To Target Reply #1 - May 9^th, 2005, 7:45pm that looks nice. Maybe I can learn something from your code. Tell us, when your game is finished.
	Bernd Salewski&&student of digital media&&Hochschule Bremen

Markavian

Move Towards Target
Reply #2 - May 9^th, 2005, 9:52pm

Well I'm making progress, I'll keep posting here.

The next step was to get an object to move around using the navigation logic. You can see here:
http://mkv25.net/?item_id=100

My next steps will be a) to add sliders/scroll bars to move the accesible area around. b) have a stack of space ships of different types that can be individually selected. c) logic to stop ships flying into each other (without damaging each other).

I intend to make use of multiple files to break the code down. Ic an see the spaceShip class getting quite large in the future.

Markavian Full Member Offline Posts: 174	Slider Bars / Scroll Pane Reply #3 - May 10^th, 2005, 11:34pm So as progress goes I made a slider class and drew a picture which you can slide around, using the sliders. I was wondering, is there any way to include Swing components in processing? Anyhow, heres my latest addition: http://mkv25.net/?item_id=101
	« Last Edit: May 14^th, 2005, 6:46am by Markavian »

Mythmon

Re: Draw Points To Target
Reply #4 - May 11^th, 2005, 12:48am

it is possible (at least it was in alpha) buts its messy, at least in my opinion, because its just like you would do it in java.

i remember some one asked this during alpha and fry told them yes and explained how to do it, then explained how that wasn't exactly what procesing was about, that it was to be able to experiment with gui and graphics and things easily

oh, and by the way, i think you should add something to the code for move to target, that if the target is inside the minimum turning radius, to manevure until it is possible to get it (dont know how though, maybe back up x pixels?)

fry YaBB Moderator Offline Posts: 2623 mass, usa	Re: Draw Points To Target Reply #5 - May 11^th, 2005, 1:40am nah, you can't use swing components inside a p5 app.. if you want to use swing components, you need to make a regular java application using something like eclipse, which you can embed a processing applet inside of, since an applet is just a "Component" (though not JComponent) like any other.

Markavian

Re: Draw Points To Target
Reply #6 - May 14^th, 2005, 6:31am

Thanks fry, I didn't think so - it'd get really messy considering processing handles much of the GUI things on its own.

Like I said, I'd keep posting any new developments towards my game... I've been playing with an object stack, draggable objects, and interface classes:
(see, I actually learnt something on my java course =))

http://mkv25.net/index.php?item_id=102
http://mkv25.net/applets/changeFocus_a1/
(source files)

Edit:
(BTW the description in the code/on the webpage is slightly wrong because I wrote it before I wrote the actual code, and changed my mind half way through).

Markavian

Re: Draw Points To Target
Reply #7 - May 14^th, 2005, 6:38am

mythmon wrote on May 11^th, 2005, 12:48am:

oh, and by the way, i think you should add something to the code for move to target, that if the target is inside the minimum turning radius, to manevure until it is possible to get it (dont know how though, maybe back up x pixels)

Sorry Mythmon, just caught your post... thanks again for the info on processing/swing.

I wasn't sure what to do about targets within the minimum turning circle. For a start I hadn't considered reverse movement - but that would be the fastest way to turn to a close target so I presume I should implement something along those lines.

I don't want to get bogged down with the movement too badly at this stage. I've got plans for fleshing out everything with a turn based movement system, e.g. movement points per turn, each player selecting their units and giving commands etc.

I'll be keeping it modulated tho, so if I do think up new movement methods I can easily drop them in. (I keep thinking about an S-shaped move where the end angle correlates to the start angle).

Markavian

Re: Sliders
Reply #8 - May 14^th, 2005, 6:45am

I think I'll go back and improve my sliders. They currently feel very choppy since only one click is required to set their final position... and I noticed myself trying to smoothly drag along the bar, which is fine so long as I don't move outside the bar.

Also, dragging from left->right and just catching the bottom of the vertical slider sends the bar/box/value right down to the bottom in one jump. This is where my hasFocus idea will come in handy...

ref: http://mkv25.net/?item_id=101

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