Programming Forums > Application Development > Java

Eric the Red · May 11th, 2006, 5:14 PM

Hey,

So I've started to make a tetris game for java. So far, I've created a bunch of classes.

Now I need a class to control the drawing of my tetris shapes. What would be the best way to display an image to the screen (such as a jpeg)?

Please help me out. I looked around google and sources tell me that if I don't use the correct methods, that the picture flickers a lot.

Jimbo · May 11th, 2006, 6:47 PM

You probably dont want to actually write an image file. Look into the Swing classes, especially Graphics or Graphics2D. I think you modify the paint() method of the JFrame or JPanel you're drawing in to call the draw method for your stuff, using the Graphics object you get in paint().

Dameon · May 11th, 2006, 7:48 PM

Jimbo is dead on. As for flickering, I wouldn't worry. Swing is double-buffered by default, IIRC.

titaniumdecoy · May 11th, 2006, 10:27 PM

What is the difference between Graphics and Graphics2D? They both appear to be for 2D drawing...

lectricpharaoh · May 11th, 2006, 10:47 PM

You don't need raster images for this. After all, the shapes are quite simple: they're basically squares. You might want bevelled edges with shading, in which case you can draw the block in its regular color, two adjacent edges (using line drawing) in a lighter color, and the remaining two edges in a darker color. You could do what I did, and use rounded rectangles. If you want to see if it looks good enough, the .jar file is here, though I think you'll need to save it locally before running it.

Eric the Red · May 15th, 2006, 4:14 PM

Quote:

Originally Posted by lectricpharaoh

You don't need raster images for this.

Actually, I want import pictures as a .jpeg. I do not want to use the built in draw commands e.x (drawRect, drawOval).

I looked everywhere for swing methods i still can't find any. Please if anyone knows how to draw a jpeg to the screen your help in this would be greatly appreciated.

Freaky Chris · May 18th, 2008, 4:15 AM

[delete me]

andro · May 12th, 2006, 1:47 PM

Quote:

Originally Posted by titaniumdecoy

What is the difference between Graphics and Graphics2D? They both appear to be for 2D drawing...

For one, Graphics2D allows the use of double and float data types.

curiosity-killed-the-cat · May 12th, 2006, 5:56 PM

Quote:

Originally Posted by titaniumdecoy

What is the difference between Graphics and Graphics2D? They both appear to be for 2D drawing...

From memory, i recall one of the differences is the reuse of objects.

Graphics:

(Toggle Plain Text)

    // normal draw large rectangle
    g.drawRect(10,10,300,300);
    g.drawString("First Rectangle",10,10);

Graphics 2D:

(Toggle Plain Text)

    // define a Rectangle2D object and ask g2D to draw it
    Rectangle2D r = new Rectangle2D.Float( 200.0F,30.0F,50.0F,50.0F);
    g2D.draw(r);

    // redefine the position of the rectangle
    r.setRect(20.0F,150.0F,50.0F,50.0F);

Lisa

andro · May 15th, 2006, 4:58 PM

Just use an ImageIcon, and then g.drawImage().

May 11th, 2006, 5:14 PM	#1
Eric the Red Hobbyist Programmer Join Date: Feb 2006 Posts: 214 Rep Power: 0	2-d graphics Hey, So I've started to make a tetris game for java. So far, I've created a bunch of classes. Now I need a class to control the drawing of my tetris shapes. What would be the best way to display an image to the screen (such as a jpeg)? Please help me out. I looked around google and sources tell me that if I don't use the correct methods, that the picture flickers a lot. __________________ Death smiles at us all. All a man can do is smile back.

May 11th, 2006, 7:48 PM	#3
Dameon Troll Join Date: Apr 2005 Location: Texas Posts: 732 Rep Power: 4	Jimbo is dead on. As for flickering, I wouldn't worry. Swing is double-buffered by default, IIRC. __________________ MD5(sig) = bcef75433db02e9ad9bf81d6f7c5c270

May 11th, 2006, 10:47 PM	#5
lectricpharaoh Caffeinated Neural Net Join Date: Jun 2005 Location: Dry west coast of Canada Posts: 1,005 Rep Power: 5	You don't need raster images for this. After all, the shapes are quite simple: they're basically squares. You might want bevelled edges with shading, in which case you can draw the block in its regular color, two adjacent edges (using line drawing) in a lighter color, and the remaining two edges in a darker color. You could do what I did, and use rounded rectangles. If you want to see if it looks good enough, the .jar file is here, though I think you'll need to save it locally before running it. __________________ And once again, Probability proves itself willing to sneak into a back alley and service Drama as would a copper-piece harlot. - Vaarsuvius, Order of the Stick

May 18th, 2008, 4:15 AM	#7
Freaky Chris Hobbyist Programmer Join Date: Dec 2007 Location: England Posts: 169 Rep Power: 1	Re: 2-d graphics [delete me] __________________ Who said i couldn't program `sarcasm = raw_input('Type in a sarcastic remark: ') print sarcasm`

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May 11th, 2006, 6:47 PM	#2
Jimbo Battle Programmer Join Date: Feb 2006 Location: Bellevue, WA, USA Posts: 751 Rep Power: 3	You probably dont want to actually write an image file. Look into the Swing classes, especially Graphics or Graphics2D. I think you modify the paint() method of the JFrame or JPanel you're drawing in to call the draw method for your stuff, using the Graphics object you get in paint().

May 11th, 2006, 10:27 PM	#4
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 839 Rep Power: 3	What is the difference between Graphics and Graphics2D? They both appear to be for 2D drawing...

May 15th, 2006, 4:58 PM	#10
andro Professional Programmer Join Date: Oct 2005 Location: California Posts: 294 Rep Power: 3	Just use an ImageIcon, and then g.drawImage().

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Programming Forums > Application Development > Java

2-d graphics