Java-Gaming.org    
Featured games (91)
games approved by the League of Dukes
Games in Showcase (581)
games submitted by our members
Games in WIP (500)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Isometric & Screen Space  (Read 2195 times)
0 Members and 1 Guest are viewing this topic.
Online Agro
« Posted 2012-11-04 04:19:46 »

I'm working on a game that required me to convert screen -> isometric space, and it took me some time to come up with these equations, and theagentd suggested I post my findings: https://gist.github.com/4009942

in case it gets deleted
1  
2  
3  
4  
5  
6  
7  
8  
9  
Screen -> Isometric space equations
iX = (((ScreenX) / tileWidth) - ((ScreenY) / tileHeight));
iY = (((ScreenX) / tileWidth) + ((ScreenY) / tileHeight));

Isometric -> Screen space equations
ScreenX = (iX + iY) * tileWidth / 2;
ScreenY = (iY - iX) * tileHeight / 2;

Assuming the isometric coordinating system goes as this: http://i.imgur.com/aUM4g.png

Offline masteryoom

JGO Coder


Medals: 5
Projects: 3


If you look closely, you might see it turning...


« Reply #1 - Posted 2012-11-04 04:20:33 »

cool. I hope it works.  Grin

Smiley
Offline theagentd
« Reply #2 - Posted 2012-11-04 04:33:20 »

In case anyone's wondering, those equations can for example be used to find which tile the player is clicking on, something I've seen people struggle with before.

Myomyomyo.
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline ReBirth
« Reply #3 - Posted 2012-11-04 04:45:48 »

Good, it's simple Smiley

Offline masteryoom

JGO Coder


Medals: 5
Projects: 3


If you look closely, you might see it turning...


« Reply #4 - Posted 2012-11-04 04:46:24 »

In case anyone's wondering, those equations can for example be used to find which tile the player is clicking on, something I've seen people struggle with before.
I'm not.  Grin

Smiley
Offline theagentd
« Reply #5 - Posted 2012-11-04 04:48:07 »

1  
2  
iX = (((2*ScreenX) / tileWidth) - ((2*ScreenY) / tileHeight)) / 2;
iY = (((2*ScreenX) / tileWidth) + ((2*ScreenY) / tileHeight)) / 2;


Wait a minute, I'm pretty sure

((2*ScreenY) / tileHeight)) / 2

is exactly the same as

ScreenY / tileHeight

...

Myomyomyo.
Online Agro
« Reply #6 - Posted 2012-11-04 05:03:58 »

Sorry, I'll fix it in a bit, I didn't take the time to simplify it because I was dying to see it work.

EDIT: theagentd, take a look at the parentheses again XD Its a bit confusing, but look here

((2*ScreenY) / tileHeight)) / 2

Offline sproingie
« Reply #7 - Posted 2012-11-04 05:58:38 »

The parens don't matter -- the 2's should cancel out regardless.
Offline matheus23

JGO Kernel


Medals: 98
Projects: 3


You think about my Avatar right now!


« Reply #8 - Posted 2012-11-04 13:02:57 »

Yes, if you put this into a fraction you get this:

   2 * screenY
   -----------
    tileHeight
-------------------
        2

You can leave out all the brackets here, because you only do * and / calculations.
So you can also form this into this:

      screenY
2 * -----------
    tileHeight
-------------------
        2

and then you can cancel out those 2's:

  screenY
-----------
 tileHeight

See my:
    My development Blog:     | Or look at my RPG | Or simply my coding
http://matheusdev.tumblr.comRuins of Revenge  |      On Github
Offline matheus23

JGO Kernel


Medals: 98
Projects: 3


You think about my Avatar right now!


« Reply #9 - Posted 2012-11-04 13:07:44 »

Also, what I want to add:
We sould create a Wiki for isometric resources.
We've got soooo good resources: Jonjava  Roll Eyes

See my:
    My development Blog:     | Or look at my RPG | Or simply my coding
http://matheusdev.tumblr.comRuins of Revenge  |      On Github
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Online Agro
« Reply #10 - Posted 2012-11-04 15:08:11 »

Oh ok, let me check one second.

Online Agro
« Reply #11 - Posted 2012-11-04 15:12:06 »

Alright, I fixed it. It made more sense when I entered it on wolfram to simplify. xD

Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

xsi3rr4x (55 views)
2014-04-15 18:08:23

BurntPizza (53 views)
2014-04-15 03:46:01

UprightPath (66 views)
2014-04-14 17:39:50

UprightPath (49 views)
2014-04-14 17:35:47

Porlus (66 views)
2014-04-14 15:48:38

tom_mai78101 (90 views)
2014-04-10 04:04:31

BurntPizza (151 views)
2014-04-08 23:06:04

tom_mai78101 (246 views)
2014-04-05 13:34:39

trollwarrior1 (204 views)
2014-04-04 12:06:45

CJLetsGame (211 views)
2014-04-01 02:16:10
List of Learning Resources
by SHC
2014-04-18 03:17:39

List of Learning Resources
by Longarmx
2014-04-08 03:14:44

Good Examples
by matheus23
2014-04-05 13:51:37

Good Examples
by Grunnt
2014-04-03 15:48:46

Good Examples
by Grunnt
2014-04-03 15:48:37

Good Examples
by matheus23
2014-04-01 18:40:51

Good Examples
by matheus23
2014-04-01 18:40:34

Anonymous/Local/Inner class gotchas
by Roquen
2014-03-11 15:22:30
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!