Copy bitmap 1,0 problem - GameCreators Forum

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Venatusio

12

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Joined: 6th Mar 2012

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Posted: 20th Mar 2012 09:12

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I have been staring at the screen for a while and cannot work out why this isn't working, so I an going to have a break and figure someone here will know in an instant.

+ Code Snippet

function draw_map()
    
    `Draw the map using the loaded sprites and the map data
    for y = 0 to MAPHEIGHT-1
        for x = 0 to MAPWIDTH-1

            `create bitmap 1, 640, 480
            set current bitmap 0

            paste image MAPDATA(x,y)+1, x*32, y*32
            sync

        next x
    next y

`copy bitmap 1,0
`sync
sleep 5000

endfunction

What I am trying to do is paste images onto bitmap 1 and then copy it over to 0.

The code as it is works - it reads the imagenumber(to get the right tile) from the array and draws the map to the screen. But as soon as I change set current bitmap to 1 and then uncomment the copy bitmap 1,0 and sync command I just get a blank screen.

I have obviously misunderstood a concept here or my code sucks :-(

All help greatly appreciated.

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Pincho Paxton

21

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Joined: 8th Dec 2002

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Posted: 20th Mar 2012 10:45

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It looks like you are doing it backwards, and putting the image on bitmap 0.

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Venatusio

12

Years of Service

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Joined: 6th Mar 2012

Location:

Posted: 20th Mar 2012 11:44

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I got it, it was in fact working but the sync in the loop made it draw really slow.

So it was drawing to bitmap 1 but took about 30 seconds to draw it all.

Staring at a blank screen I was giving up on it and hitting esc before it got to the copy bitmap 1,0

Once I removed the sync out of the loop it came up instantly.

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HowDo

21

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Joined: 28th Nov 2002

Location: United Kingdom

Posted: 20th Mar 2012 17:43

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give this a try, what it does is makes a bitmap 1, then pastes everything you wanted to it, does a sync to make everthing stick then copies it to bitmap 0, reset the bitmap to 0, where you should now see what you done.

+ Code Snippet

function draw_map()
    create bitmap 1, 640, 480
    set current bitmap 1
    `Draw the map using the loaded sprites and the map data
    for y = 0 to MAPHEIGHT-1
        for x = 0 to MAPWIDTH-1
            paste image MAPDATA(x,y)+1, x*32, y*32
        next x
    next y
sync
copy bitmap 1,0
sync
set current bitmap 0
sleep 5000

endfunction

Dark Physics makes any hot drink go cold.

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