Problem with Get Image - GameCreators Forum

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Christoffer

15

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Joined: 8th Feb 2011

Location: Sweden

Posted: 22nd Jul 2011 01:52

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Hi there, i have a small problem..
When i try to use Get Image with predefined variables it gives me an error saying ".....illegal area at line blah blah"
but when i use it with integers directly it works.
Here is an example.

This will give me that error.

+ Code Snippet

x As Integer = 0
y As Integer = 0

Load Bitmap "media\shipAnimation.png", 1
   For ix = 1 To 8
      Get Image ix, x,y,x+116,y+68,0 //Wont work
      x = x + 116
   Next ix
Delete Bitmap 1

While this will work without errors but does not do what i want.

+ Code Snippet

x As Integer = 0
y As Integer = 0

Load Bitmap "media\shipAnimation.png", 1
   For ix = 1 To 8
      Get Image ix, 0,0,116,68,0 //Now it works
      x = x + 116
   Next ix
Delete Bitmap 1

Maby i'm going all wrong on this, any suggestions?

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Rich Dersheimer

AGK Developer

17

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Joined: 1st Jul 2009

Location: Inside the box

Posted: 22nd Jul 2011 08:16 Edited at: 22nd Jul 2011 08:24

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How big is the image you load?

try this...

+ Code Snippet

Load Bitmap "media\shipAnimation.png", 1
   For ix = 1 To 8
      Get Image ix, (ix-1)*116, 0, ix*116, 68, 0
   Next ix
Delete Bitmap 1

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Grog Grueslayer

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Joined: 30th May 2005

Playing: Green Hell

Posted: 22nd Jul 2011 11:01

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If you go outside of the size of the bitmap with GET IMAGE it'll produce that error. To test it out load it as bitmap zero instead and make a box over where each GET IMAGE would be to see if it's going to grab the right area.

+ Code Snippet

x As Integer = 0
y As Integer = 0

` Load bitmap to screen zero instead of 1 (so you can see it)
Load Bitmap "media\shipAnimation.png",0

   For ix = 1 To 8
      ` Pick a random color
      ink rgb(rnd(255),rnd(255),rnd(255)),0
      ` Make a box (to see if it's going to grab the right area
      box x,y,x+116,y+68
      
      `Get Image ix, x,y,x+116,y+68,0
      wait key
            
      x = x + 116
   Next ix

wait key

If that's going to be a sprite eventually you should look up the CREATE ANIMATED SPRITE command... it's much easier to use.

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Green Gandalf

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Joined: 3rd Jan 2005

Playing: Malevolence:Sword of Ahkranox, Skyrim, Civ6.

Posted: 22nd Jul 2011 12:48

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I guess the reason it works in one case and not the other is because you are grabbing different areas of the bitmap and I'd also guess in your first case you are doing what the error message says.

In your non-working snippet you are incrementing x by 116 so your 8th get image is actually grabbing the region 812, 0, 928, 68. But your working snippet is grabbing the same region in each case. Perhaps your bitmap is not at least 928 pixels wide?

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Christoffer

15

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Joined: 8th Feb 2011

Location: Sweden

Posted: 22nd Jul 2011 14:32

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I have tried Rich Dersheimer suggestion and it still not work.
i did even try with this

+ Code Snippet

x1 As Integer = 1
y1 As Integer = 1

x2 As Integer = 10
y2 As Integer = 10

Load Bitmap "media\shipAnimation.png",0
Get Image 1,x1,y1,x2,y2

This will still give the error, and the image is bigger that.. :S

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Green Gandalf

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Joined: 3rd Jan 2005

Playing: Malevolence:Sword of Ahkranox, Skyrim, Civ6.

Posted: 22nd Jul 2011 16:22

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That code works fine for me so something else must be the problem.

Which version of DBPro and the Editor are you using (look at Help/About)?

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Grog Grueslayer

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Joined: 30th May 2005

Playing: Green Hell

Posted: 22nd Jul 2011 18:14

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Quote: "This will still give the error, and the image is bigger that.. :S"

The same error or a different error like "Could not load bitmap.". Perhaps the image is corrupt... attach it to your next message.

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Christoffer

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Joined: 8th Feb 2011

Location: Sweden

Posted: 23rd Jul 2011 01:14

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Well i did not work then, but it works now, well without errors anyway... haha i don't know really what i did, but thanks for all the help!

This is how the code looks now:

+ Code Snippet


_loadGraphics:
	Set Image Colorkey 255,255,255
	
	//Create the sprite for player, Image number 1 - 8
	Load Bitmap "media\shipAnimation.png", 1
	For ix = 1 To 8
		Get Image ix, (ix-1)*115, 0,ix*115,68,0
	Next ix
	Delete Bitmap 1
	
	//Create the sprite for enemyMine, Image number 9 - 16
	Load Bitmap "media\mineAnimation.png", 2
	For ix = 9 To 16
		Get Image ix, (ix-9)*46,0,(ix-8)*46,60, 0
	Next ix
	Delete Bitmap 2
	
	//Create the sprite for explosion, Image number 17 - 28
	Load Bitmap "media\explosion.png", 3
	For ix = 17 To 28
		Get Image ix, (ix-17)*133,0,(ix-16)*133,133, 0
	Next ix
	Delete Bitmap 3
	
	//Load the laser sprite Image number 30
	Load Image "media\laser.png", 30
	//Load the mainMenu, Image number 31
	Load Image "media\mainMenu.png", 31
	//Load the endMenu, Image number 32
	Load Image "media\endMenu.png", 32
	
Return

I think it was when i used a variable from outside the for loop? maby it's a bug but i tried run it in the lates ide that comes with dbp and i usally use Indigo, same error there.

Well it works now with that code. (made sure all the perimeter is inside the image)

thanks all!

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DarkBASIC Professional Discussion / Problem with Get Image