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DarkBASIC Discussion / Texturing a Matrix

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Jackdaw11
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Joined: 29th Sep 2003
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Posted: 29th Sep 2003 17:27
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This is what I have...

a 64x64 pixel bitmap
a 6400x6400 matrix with 64x64 tiles

This is what I want...

apply that bitmap to that matrix in such a way that the entire bitmap fits over the entire matrix

This is what happened...

First, I tried without splitting it into different tiles and every tile had the entire bitmap.

Second, I tried to split the bitmap into 64x64 tiles and applying each tile from the bitmap to the tile on the matrix. This worked, however, it doesn't look good. The edges are very pronounced.

Any ideas?

Thanks.
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skovron
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Posted: 29th Sep 2003 18:30
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Yeah I know the problem. It happens due to pixel filtering algorithm which takes for processing neighboring pixels. It looks good along entire texture except the edges, where it have to take pixels from neighboring tiles or from out of texture.
You need to use command SET MATRIX TRIM matrix, trimx, trimy. It moves texture border by offset (trimx, trimy)
But you must experiment with values and find that suits your program. I used 0.24, 0.24
I hope it'll help
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Jackdaw11
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Posted: 29th Sep 2003 18:55
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I am using DB Classic, and I think SET MATRIX TRIM is only available on DB Pro.

Can anyone confirm that DBC doesn't support SET MATRIX TRIM or anything like that?

Thanks.
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skovron
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Posted: 29th Sep 2003 19:23
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If so then sorry! I have used this command only once with DBP ofcourse (I dont use matrix anymore, I am trying to replace matrix with meshes) and i didnt know its missing in DBC.
Sorry but in this situation I dont know how to solve your problem.
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ReD_eYe
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Posted: 29th Sep 2003 22:14
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try playing with the set matrix command, i think setting the filter to 2 might make the edges blur or something similar, so it might look at bit better


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TDK_Man
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Posted: 4th Oct 2003 16:51
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The problem is quite simple to solve - increase the size of your texture bitmap.

64x64 pixels is not enough data so DB does it's best to stretch onto the matrix. Try with a 1024x1024 texture and you'll notice the difference.

DB's Prepare Matrix Texture is all that is needed to create the tiles from the texture bitmap and there's an example program demonstrating this on the Source Library board at the MatEdit forum (http://www.matedit.com/forums). You will have to register (free) to access all of the boards though.

TDK

MatEdit Pro Info & Progress Reports: http://www.matedit.com
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