Java-Gaming.org Hi !
Featured games (81)
games approved by the League of Dukes
Games in Showcase (513)
Games in Android Showcase (119)
games submitted by our members
Games in WIP (576)
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  
  Transparent rectangle using awt ?  (Read 1398 times)
0 Members and 1 Guest are viewing this topic.
Offline ataris

Senior Newbie





« Posted 2005-08-10 21:58:53 »

Hi,
This may sound like a bit of a silly question, but i was wondering if anyone knows how to draw a rectangle over the top of an image. So that i can see both the rectangle on top but also see the image underneath through it. Is this possible ?
Offline Jeff

JGO Coder




Got any cats?


« Reply #1 - Posted 2005-08-11 01:21:25 »

It sounds like you are describing translucency.

AWT doesnt support translucency yet, just 1 bit transparency.

Got a question about Java and game programming?  Just new to the Java Game Development Community?  Try my FAQ.  Its likely you'll learn something!

http://wiki.java.net/bin/view/Games/JeffFAQ
Offline rdcarvallo

Senior Duke


Projects: 5
Exp: 15 years


2D Java games forever!


« Reply #2 - Posted 2005-08-11 14:55:01 »

Hi .
   As Jeff said, AWT doesn't support translucency (it supports it, but it's not hardware accelerated)
   But you want to draw a rectangle over the image, this can be done with:
1  
2  
3  
4  
//in your rendering code
g.drawImage(image,x,y,....);
g.setColor(new Color(0,0,255,100)); //The last param is the alpha that goes from 0: transparent to 255: opaque
g.fillRect(rx,ry,rw,rh);


    The only problem is that not being hardware acceleratred, this drops your performance and (almost) cannot be used in realtime applications.
   
    I use this trick to indicate selections in my tile editor (the tile selected is highlighted in blue).

     Rafael.-
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline ataris

Senior Newbie





« Reply #3 - Posted 2005-08-11 16:25:54 »

Yea, translucency was what i meant, not transparency  Roll Eyes

Thats brilliant rdcarvallo ! That's exactly what i need i think and for exactly the same reason you use it  Grin Will try it when i get in.
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.

Longarmx (38 views)
2014-10-17 03:59:02

Norakomi (29 views)
2014-10-16 15:22:06

Norakomi (24 views)
2014-10-16 15:20:20

lcass (28 views)
2014-10-15 16:18:58

TehJavaDev (57 views)
2014-10-14 00:39:48

TehJavaDev (56 views)
2014-10-14 00:35:47

TehJavaDev (47 views)
2014-10-14 00:32:37

BurntPizza (64 views)
2014-10-11 23:24:42

BurntPizza (36 views)
2014-10-11 23:10:45

BurntPizza (78 views)
2014-10-11 22:30:10
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

List of Learning Resources
by SilverTiger
2014-07-31 16:26:06
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!