Java-Gaming.org    
Featured games (91)
games approved by the League of Dukes
Games in Showcase (578)
games submitted by our members
Games in WIP (499)
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  
  LibGDX rectangles not calculating negative width and heght  (Read 155 times)
0 Members and 1 Guest are viewing this topic.
Offline kingroka123

JGO Knight


Medals: 22
Projects: 3
Exp: 10-12 months


Gamer's Helmet


« Posted 2014-01-24 02:51:34 »

So i've implemented a highlighting box into my game (if not sure what I mean go here  Pointing kind of like this except in 2d) and it works perfectly if my mouse moves in a totally positive manner (+x and +y) but when I try to move my mouse in any negative (-x or -y) it won't move. here is my code :
note: this is the rectangle class from libGDX package
1  
com.badlogic.gdx.math.Rectangle

1  
2  
3  
public static Rectangle mbounds() {
      return new Rectangle(startX, startY, boxSizeX, boxSizeY);
   }

start x is where the mouse was clicked first and the boxSizes are the current mouse position minus the start position
so:
1  
2  
boxSizeX=currentX -startX;
boxSizeY = currentY-startY;


any help would be great
btw, if anyone knows how to draw a rectangle of this kind straight from the function, please tell me thanks again

[EDIT] New Information!!! It seems that the problem may lie in the .overlaps() function because when I set a shape renderer to draw it, it drew correctly. Which means it is probably a problem with collision.

I get collision by calling:

1  
2  
3  
if(mbounds().overlaps(bounds()){
//do something
}


Offline Riven
« League of Dukes »

JGO Overlord


Medals: 605
Projects: 4
Exp: 16 years


Hand over your head.


« Reply #1 - Posted 2014-01-24 08:56:20 »

Just take the 2 coordinates of the start-point and end-point of your area, and calculate the rectangle as such:

1  
2  
3  
4  
5  
6  
pMin.x = Math.min(p1.x, p2.x);
pMin.y = Math.min(p1.y, p2.y);
pMax.x = Math.max(p1.x, p2.x);
pMax.y = Math.max(p1.y, p2.y);

new Rectangle(pMin.x, pMin.y, pMax.x - pMin.x, pMax.y - pMin.y);

Hi, appreciate more people! Σ ♥ = ¾
Learn how to award medals... and work your way up the social rankings
Pages: [1]
  ignore  |  Print  
 
 

 

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 (31 views)
2014-04-15 18:08:23

BurntPizza (28 views)
2014-04-15 03:46:01

UprightPath (43 views)
2014-04-14 17:39:50

UprightPath (25 views)
2014-04-14 17:35:47

Porlus (42 views)
2014-04-14 15:48:38

tom_mai78101 (64 views)
2014-04-10 04:04:31

BurntPizza (124 views)
2014-04-08 23:06:04

tom_mai78101 (223 views)
2014-04-05 13:34:39

trollwarrior1 (190 views)
2014-04-04 12:06:45

CJLetsGame (198 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!