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AppGameKit Classic Chat / GetObjectHeightMapHeight() returns 0 if heightmap non-power-of-2

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Nieb
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Posted: 12th Jul 2018 10:52 Edited at: 22nd Jul 2018 14:25
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If either the heightmap image is non-power-of-2 or if the heightmap-object's size is set to non-power-of-2, then GetObjectHeightMapHeight() returns 0.

I would like my terrain to have 256x256 faces, with each face being 1x1 units, which requires 257x257 verts. Or, 256x256 verts which requires the object's size be 255x255. Either way GetObjectHeightMapHeight() won't work.

@_Nieb_

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Santman
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Posted: 12th Jul 2018 11:47
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You could try just using recasting to get the height at any given spot.
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Bengismo
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Posted: 12th Jul 2018 12:00 Edited at: 12th Jul 2018 12:05
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Ive just tried GetHeightmapHeight with a 256x256 image and it works fine and returns the height absolutely fine.

I then tried with a 255x255 and then a 127x127 and they also work fine too.

With all due respect - your doing something wrong if its not working for you. Maybe check you coordinates that your checking the height for are actually within your terrain ??




Raycasting also works but requires a bit more calculation in the code and from AppGameKit too and is slower generally so I wouldnt use it unless you need to.
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Bored of the Rings
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Posted: 12th Jul 2018 12:18
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@Nieb-do have a code snippet so we can help?
Professional Programmer, languages: SAS, C++, SQL, PL-SQL, DBPro, Purebasic, JavaScript, others
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Nieb
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Posted: 12th Jul 2018 13:42 Edited at: 12th Jul 2018 16:06
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I've decided to use RayCasting as Santman suggested.
Because I wanted the height of the center of the face, not the vertex, anyhow.
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Nieb
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Posted: 12th Jul 2018 13:58 Edited at: 22nd Jul 2018 14:26
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I've attached a test project, with code, demonstrating the issue.
It is attached to the original post.

Change the "Which" var to see the different examples.
@_Nieb_

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Bengismo
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Posted: 12th Jul 2018 14:47 Edited at: 12th Jul 2018 14:56
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Quote: "Because I wanted the height of the center of the face, not the vertex, anyhow."


GetHeightmapHeight() doesnt give you the vertex height....it calculates the position on the face. (interpolates)
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Nieb
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Posted: 12th Jul 2018 16:06
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Ah right, suppose it does..
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