Run time error blues... - GameCreators Forum

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Graiskye

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Joined: 29th Jul 2006

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Posted: 4th Aug 2006 11:04

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Well this is driving me nuts, very simple bit of code, out of a programming book on DB, and as far as I can tell it should work but it doesnt get a runttime error at line 12(IIRC), the first load image cmd.

+ Code Snippet

`-----------------------------------
`Beginner\'s Guide To DarkBASIC Game Programming
`Copyright (C)2002 Jonathan S. Harbour and Joshua R. Smith
`Chapter 11 - TransSprite Program
`-----------------------------------

`Initialize the program
hide mouse
set display mode 800, 600, 32
cls
`Load background bitmap
load image \"testbkgrdBmp664_596\",0
`Load the source bitmap file
load image \"f15Bmp.bmp\", 1

`Grab image 1 from bitmap
get image 1,0,0,300,300

`Draw the sprite
sprite 1,170,90,1

`Wait for keypress
wait key
end

Now I have the media in the project file, I am using my own media, really stumped. Such a simple thing but I cannot get it too work.

Appreciate any help offered.

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Graiskye

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Joined: 29th Jul 2006

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Posted: 4th Aug 2006 11:35

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Okay sorry about this but..alas I cant edit my posts yet. If you notice theres one misnamed .bmp, well so did I , only it was right after I posted !
BUT I fixed it in the code, thinking for sure this is the problem, and still nothing ? Just to be sure here is the corrected code...

+ Code Snippet

`-----------------------------------
`Beginner's Guide To DarkBASIC Game Programming
`Copyright (C)2002 Jonathan S. Harbour and Joshua R. Smith
`Chapter 11 - TransSprite Program
`-----------------------------------

`Initialize the program
hide mouse
set display mode 800, 600, 32
cls
`Load background bitmap
load image "testbkgrdBmp664_596.bmp",0
`Load the source bitmap file
load image "f15Bmp.bmp", 1

`Grab image 1 from bitmap
get image 1,0,0,300,300

`Draw the sprite
sprite 1,170,90,1

`Wait for keypress
wait key
end

My apologies to the post mod... I'll try not to repeat.

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wildbill

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Joined: 14th Apr 2006

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Posted: 4th Aug 2006 17:09

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This line "load image "testbkgrdBmp664_596.bmp",0" may be the problem. You are assigning image number as zero. I think you need to assign something higher than zero. If you load bitmap instead of image and assign as zero it will make it the screen.

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Zergei

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Joined: 9th Feb 2005

Location: Everywhere

Posted: 4th Aug 2006 17:50 Edited at: 4th Aug 2006 17:54

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Well, your loading images, not bitmaps, so, the "get image" command returns nothing but a blank screen. "Get image", grabs a section of the "Current bitmap" (wich is also a command), wich you can set with "Set current bitmap" command. Bitmap 0 is screen. Hope that helps, and just in case, here's the code:

+ Code Snippet

`-----------------------------------
`Beginner's Guide To DarkBASIC Game Programming
`Copyright (C)2002 Jonathan S. Harbour and Joshua R. Smith
`Chapter 11 - TransSprite Program
`-----------------------------------

`Initialize the program
hide mouse
set display mode 800, 600, 32
cls
`Load background bitmap
load bitmap "testbkgrdBmp664_596.bmp",0
`Load the source bitmap file
load bitmap "f15Bmp.bmp", 1

`Grab image 1 from bitmap
set current bitmap 1
get image 1,0,0,300,300
set current bitmap 0
delete bitmap 1

`Draw the sprite
sprite 1,170,90,1

`Wait for keypress
wait key
end

or

+ Code Snippet

`-----------------------------------
`Beginner's Guide To DarkBASIC Game Programming
`Copyright (C)2002 Jonathan S. Harbour and Joshua R. Smith
`Chapter 11 - TransSprite Program
`-----------------------------------

`Initialize the program
hide mouse
set display mode 800, 600, 32
cls
`Load background bitmap
load bitmap "testbkgrdBmp664_596.bmp",0
`Load the source bitmap file
load image "f15Bmp.bmp", 1

`No need for grabbing image 1, as it is directly loaded,
`unless, it's just a part of the image you want.

`Draw the sprite
sprite 1,170,90,1

`Wait for keypress
wait key
end

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Graiskye

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Joined: 29th Jul 2006

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Posted: 4th Aug 2006 21:00

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Thanks again Zergei. Now I have managed to get it to work, somewhat.
I can get the background to show up, if I rem out the second load, otherwise it only flashes the background and then shows thef15 sprite on a blue screen background ?
As you can gather this is a straight copy and paste from a Ebook I found, the syntax got changed slighlty in my quest to try to get it working, the book is written for DarkBasic, and I am using DBPro so I thought maybe that was the prob, the documentation with DBPro leaves a LOT too be desired, aside from a lot of examples of code that I have no idea what they mean, and an index that, well its an index, so Im forced to scour the web for examples and such that I can learn from...
Anyways long story short, I thought there might be a differnce in the code, thus I modified it slightly exchanging the load bitmap, with load image, because I could not find any refeerence to load bitmap in the documentation provided.
What I thought would happen , and what I am trying to get is for the background to be drawn, then the sprit drawn over the background.
Rather than post in two different threads, I'll just mention that in the other proigram I am toying with, the tile based map, I have managed to get the map to appear, but it just flashes quickly on the screen, then it is gone ?
How can I make the image, in this case the completed map, or the background image above, how do I make it stay on the screen, rather than flashing and then black, or blue screen.
Thanks again, appreciate the life line,lol.

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