Question

For Drawimage, how do I load seethrough bitmaps?

Asked by: xannus

I have bitmaps I want to load into a game. They are not entire images. What is behind them must be visible.

The first one is a Mutalisk (attack bird) animated gif.
To get it animated in my game, I split the gif into its 8 frames.
I then load all 8 images in as Image objects.
To animate the mutalisks, I proceed through the bitmaps as necessary, to animate.
How do I load in see-through bitmaps / gifs.

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Asked On
2009-10-08 at 14:21:14ID24797649
Tags

Java swing

Topics

Java Programming Language

,

Java AWT & Swing

Participating Experts
2
Points
500
Comments
18

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Answers

 

by: federicomarinucciPosted on 2009-10-09 at 03:01:08ID: 25533498

You should use an image format which allow transparency (.png or .gif), in both cases depending on the software you use to build them, you may need to explicty set the transparency when saving the image.

 

by: xannusPosted on 2009-10-09 at 18:39:45ID: 25540279

Do you mean in photoshop?
Will the Image Object detect this appropriately?

 

by: objectsPosted on 2009-10-09 at 18:44:24ID: 25540293

java supports transaparency, and also animated gifs so you shouldn't need to bother with animating yourself

 

by: federicomarinucciPosted on 2009-10-14 at 00:50:23ID: 25568091

Yeah, in Photoshop or any other graphic software you may use.
Setting the transparency property is needed when saving an image, both with static or animated ones.

 

by: xannusPosted on 2009-10-14 at 06:42:40ID: 25570333

How is transparancy specified?
It isnt automatic when the gif is loaded in. Is there a parameter to indicate it?

The animated gif is already transparent.
In
this.drawimage(...) , for example, must it already be a transparent object?

 

by: objectsPosted on 2009-10-14 at 16:43:10ID: 25576247

its automatic, you don't need to do anything

 

by: xannusPosted on 2009-10-26 at 15:16:38ID: 25667525

How do you load in a transparent moving image, properly?
To work w/ drawmage?

 

by: xannusPosted on 2009-10-26 at 15:19:05ID: 25667547

Or, if not drawImage, what is the best way to do it?

 

by: objectsPosted on 2009-10-26 at 15:27:56ID: 25667647

just load it same way you load any image and use a JLabel to display it

 

by: xannusPosted on 2009-10-26 at 18:43:25ID: 25668587

-thx,
I tried it,
but I think my activity in the paint(
method messes everything up, cause it isnt a regular interface type window, it is full-screen, all black, everything done in paint method - no choice boxes, just the game. See attched java code in .txt, plz.
How can I get the animated muta gif at the URL to be animated? Spacebar and left click fires.
What can I do?
thx

 

by: xannusPosted on 2009-11-07 at 13:32:59ID: 25768152

B.T.W.
Is the mutalisk at
http://www.jamescomp.com/pics/mutalisk.gif
transparent?

 

by: objectsPosted on 2009-11-07 at 13:36:32ID: 25768165

yes

 

by: xannusPosted on 2009-11-07 at 17:39:57ID: 25768997

Thx
a relief on the transparent muta :)
What might a paint(...) method / JFrame class look like to display this crackheaded Mutalisk, flapping at x,y

? :)

 

by: objectsPosted on 2009-11-07 at 23:44:19ID: 25769713

have you tried just displaying the image in a JLabel?

 

by: xannusPosted on 2009-11-08 at 07:16:38ID: 25770700

No, I couldnt get it to work. :)
I'd prefer it if I could place the moving gif at any x,y in the paint() method.
That's why I was doing it frame by frame. But that isnt transparent.
I say any x,y because the muta will fly around the screen in my Mario-Bros like game.
Is that possible?
Would you please be able to show the code, the paint() method with this muta, at
http://www.jamescomp.com/pics/mutalisk.gif, placed at, say 80,80 in a 200x200 window
-thanks

 

by: xannusPosted on 2009-11-08 at 16:11:10ID: 25772676

I just got the JLabel thing to work !
Thanks objects...I just didnt try long enough.
See attached code
Now, how do I get the image to move around in this code.
Changing its position in  the Paint() method does nothing. Where should I move the mutalisk?

import java.awt.*;
import java.net.*;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
 
public class animatedGIF extends JFrame {
    JPanel contentPane;
    JLabel label;
    int x,y;
    JLabel imageLabel = new JLabel();
    JLabel headerLabel = new JLabel();
 
    public void paint() {
    	Graphics G = this.getGraphics();
    	G.setColor(Color.black);
    	...???how.do.I.move.the.mutalisk??
    	
    	
    	
    	
    	
    
    }
    public animatedGIF() {
        try {
        	
        	x=100;
        	y=100;
        	JFrame f = new JFrame("Animation");
        	 
        	label = new JLabel(new ImageIcon(new URL("http://www.jamescomp.com/pics/mutalisk.gif")));
        	 
        	f.getContentPane().add(label);
        	f.pack();
        	f.setLocationRelativeTo(null);
        	f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        	f.setVisible(true);
        } catch (Exception e) {
        	System.out.println("animGIF() excep : "+e);
            e.printStackTrace();
        }
    }
}
                                              
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by: xannusPosted on 2009-11-09 at 13:27:03ID: 25780280

Thanks
Now that the Mutalisk is added to the window, flaps its wings, how do I get it to move?

 

by: objectsPosted on 2009-11-09 at 13:52:57ID: 25780523

20120131-EE-VQP-002

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