Java-Gaming.org Hi !
Featured games (83)
games approved by the League of Dukes
Games in Showcase (538)
Games in Android Showcase (132)
games submitted by our members
Games in WIP (601)
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  
  Rotating Sprites [Solved]  (Read 343 times)
0 Members and 1 Guest are viewing this topic.
Offline GlennBrann
« Posted 2013-12-06 14:27:31 »

Hey Everyone,

I am using pure Java, no 3rd party libraries and I want to be able to rotate one of my sprites. My sprite is 16x16 pixels. Right now i know how to rotate with AffineTransformation but for some reason when it rotates the sprite looks very weird. This might be due to it being very small. but maybe someone could help me. Thanks

~GlennBrann
Offline Varkas
« Reply #1 - Posted 2013-12-06 14:50:19 »

How exactly is it looking weird? Rotation will come with a (more or less ) notable loss of quality, depeing on the exact setting (anti-aliasing, transparency etc.)

I seem to remember that old games had all rotations as separate sprites, mostly likely all views were separetly made or retouched. I don't know if rotation was just too slow that times, or if it was a quality problem.

if (error) throw new Brick(); // Blog (german): http://gedankenweber.wordpress.com
Offline Damocles
« Reply #2 - Posted 2013-12-06 15:16:49 »

Do you want to just flip / mirror or do a 90 Degree turn,
or do you want to make a fine rotation (under 90 Degrees)

In the case of a fine rotation, I suggest to use a propper graphics program for this, and render every frame
onto a bitmap, this will have much better quality and is faster to render (unless you prerender your graphics).


Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline saucymeatman
« Reply #3 - Posted 2013-12-07 04:11:23 »

I can help you with this!  Grin

Ive had a simmiliar issue and the reason for it is because when you use affinetransform even if you are not using any antiailiasing when you rotate an image multiple times it begins to be "weird".

So the answer to this is to instead of actually rotating the image, you should store a double with the desired rotation and right before rendering rotate it that amount and render the rotated image. The rendered image will be perfect.

Code example from TheEntropyGameEngine :


1  
2  
3  
4  
5  
6  
7  
                AffineTransform at = new AffineTransform();
               
                at.translate(image.getImageLocationX(), image.getImageLocationY());
                at.rotate(image.getImageRotation(), image.imageSrc.getWidth()/2, image.imageSrc.getHeight()/2);
               
                Graphics2D g2d = (Graphics2D) g;
                g2d.drawImage(image.imageSrc, at, null);


Within the,
1  
paintComponent(Graphics g)

Remember that all the image.whatever(); code is irrelevant to you, that is specific data for rendering objects in my engine.
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.

rwatson462 (30 views)
2014-12-15 09:26:44

Mr.CodeIt (20 views)
2014-12-14 19:50:38

BurntPizza (42 views)
2014-12-09 22:41:13

BurntPizza (76 views)
2014-12-08 04:46:31

JscottyBieshaar (37 views)
2014-12-05 12:39:02

SHC (50 views)
2014-12-03 16:27:13

CopyableCougar4 (48 views)
2014-11-29 21:32:03

toopeicgaming1999 (114 views)
2014-11-26 15:22:04

toopeicgaming1999 (102 views)
2014-11-26 15:20:36

toopeicgaming1999 (30 views)
2014-11-26 15:20:08
Resources for WIP games
by kpars
2014-12-18 10:26:14

Understanding relations between setOrigin, setScale and setPosition in libGdx
by mbabuskov
2014-10-09 22:35:00

Definite guide to supporting multiple device resolutions on Android (2014)
by mbabuskov
2014-10-02 22:36:02

List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50

List of Learning Resources
by SilverTiger
2014-07-31 16:29:50
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!