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DarkBASIC Professional Discussion / bump mapping problems

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Vandetta
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Posted: 4th May 2003 00:22
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Has anyone noticed any problems with bump mapping? First of all I thought bump maps were supposed to be black an white images. The one in the example is colored. Second I applied the bump map from the example to a cube, and one face looked pretty nice but all the other faces were either completely dark or nearly completely dark. I also got a regular black and white bump map off the internet and tried the same thing. It looked terrible (kind of just looked like it was using the bump map as a texture) and the cube was very dark.
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KamaKase
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Posted: 4th May 2003 02:36
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...ermmmm. I guess you can use colour. But then it will probably just take the average of the darkness off the amount of colour. As for the rest...
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Vandetta
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Posted: 4th May 2003 12:30
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well when I use a black and white bump map it just looks like some blury black and white texture over the object and makes it real dark. The only semi good results I get is when I use the colored one that came with the examples, then certain parts of the object is real dark but the part that isnt looks pretty good.

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Shadow Robert
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Posted: 4th May 2003 14:21
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invert the bumpmaps colours black=white white=black
should help, but i'm not sure why it'd be doing this

Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?
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Vandetta
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Posted: 4th May 2003 23:08
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Here, I posted some shots over at realgametools.com

http://www.realgametools.net/forums/index.php?board=14;action=display;threadid=15132

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Shadow Robert
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Posted: 4th May 2003 23:11
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firstly i'd make the bumpmap greyscale, secondly i'd invert it... thirdly what graphics card & drivers are you using?

Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?
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Vandetta
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Posted: 4th May 2003 23:28
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Im using a geforce 4 and the drivers that came with it...how do you invert it? I posted a shot over there too with a grey scale bump map and the results dont look so great either.

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Shadow Robert
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Posted: 5th May 2003 01:18
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well just open the file in mspaint and then invert is on one of the menus
and i'd suggest you update to the latest detonator drivers which can be found >here< - the base drivers are oftenly slightly flawed, but they're the most stable at the time of release.

Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?
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Vandetta
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Posted: 5th May 2003 01:54
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I installed the latest drivers and still have the same problems.

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Vandetta
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Posted: 5th May 2003 01:56
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any way to make an image grey scale with paint? I see monochrome but no grey scale.

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Shadow Robert
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Posted: 5th May 2003 01:58
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nope can't grey in mspaint... gotta use something else for it, like photoshop or paintshop

Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?
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Vandetta
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Posted: 5th May 2003 03:03
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Ok, I've tried everything you said and everything still appears very dark.

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Shadow Robert
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Posted: 5th May 2003 09:19
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not really sure what else to suggest, just out of interest is your GeForce4 a Ti/Ultra or is it an Mx?
if it was any other of the GeForce line wouldn't make a different, but the Mx 420,440,460,480 cards don't support any of the advanced features in dbpro. So this could be the actual problem, if not i'd say its time to email Lee because i can't think of anything else you could be doing wrong

Tsu'va Oni Ni Jyuuko Fiori Sei Tau!
One block follows the suit ... the whole suit of blocks is the path ... what have you found?
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Vandetta
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Posted: 5th May 2003 09:45
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mines a TI 4600 8x agp

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Scorpyo
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Posted: 5th May 2003 15:17
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run the demo code in the command help section and you will know ( should be option number 7 if i remember well)
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Vandetta
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Posted: 5th May 2003 23:58
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I ran the the example and inserted a control camera using arrowkeys and set ambient light 100. Then when I hit the bump mapping option I didnt really notice any change in the asteroid except some parts of it seemed darker, then I went to the back side of it and it was nearly completely dark.

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Scorpyo
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Posted: 6th May 2003 00:49
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The thing behaves differently if you go from 1 to 9 instead of 9 to 1.. did you try both ways?..could it be your case? ( your are doing something else before applying the bump)
Sorry i can't test your example i have a Geforce 2 mx
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Vandetta
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Posted: 6th May 2003 03:10
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I dont think so have a look at this over at realgametools.com

http://www.realgametools.net/forums/index.php?board=14;action=display;threadid=15132

I posted some screens and the code I was using.

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