In the Terrain.ini files I see this-----TerrainHeightMapSize----but it is not listed in the relevant documentation. At least I cant find it.
Where is this defined please?
Hi, TerrainHeightMapSize is no longer required, so will now be ignored.
In earlier versions, it was previously required to specify the size of a square image defining the heightmap, but because this can be found directly from the image dimensions, it is not required any more.
If you are using a binary heightmap (a list of 32 bit floating point values), TerrainHeightMapRows and TerrainHeightMapColumns are now used instead, as non-square heightmaps are allowed.
Hello Admin,
OK, makes sense.
I am just starting with Bridge Command. So far I have been trying to use (simple) greyscale .png files for height. I am having difficulty getting realistic shorelines--getting the slope right is hard and I usually end up with cliffs because I have the greyscale gradient too steep. To manually edit a large map has consumed many hours late at night already.
One question, for an 8 bit 256 level greyscale, is zero (water level) represented by 127 or half way between Max Height and deepest depth in the terrain.ini file?
Hi, with a normal greyscale image, 0 represents -1*SeaMaxDepth, and 255 represents TerrainMaxHeight, with linear interpolation in between. This actually means that the 'half way' between max height and max depth is between 127 and 128 greyscale values.
I made a simple calculator at https://www.bridgecommand.co.uk/data/_uploaded/file/Height%20conversions_255.xlsx which might be useful.
The relatively small number of steps available in a greyscale image is why there is also the 'RGB' encoding (height in metres is set by (red * 256 + green + blue / 256) - 32768), or raw 32 bit floating point format available, which both allow a much finer elevation step.