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| [[Translation:en/Manual/Heightmap]] | ||
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| {{zh/翻译|origin= en/Manual/Heightmap| from=en | to=zh | Percentage=0}} | ||
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| A '''heightmap''' is a computer image that can be used to generate maps based on pixel brightness (See [https://www.wikipedia.org/wiki/Heightmap wikipedia]). | ||
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| ==使用高度图== | ||
| A heightmap can be considered a grayscale image where the brightest white (closest to '''#FFFFFF''') is considered as the highest point of the map, and the darkest black (closest to '''#000000''') is considered as the lowest point of the map. Look at the [[#grayscale-table|grayscale table]] below for more accurate info. | ||
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| On a 1:1 image to map conversion, one pixel from the image file represents a corner of 4 tiles. Therefore, if you wish to lower/raise one whole tile, you need to make the 2x2 surrounding pixels brighter/darker. | ||
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| Since edges of the map must be at sea level, at least one tile, the heightmap border can be seen as 2 pixels wide. | ||
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| ===支持的文件格式=== | ||
| * [https://www.wikipedia.org/wiki/Bitmap_Image BMP] | ||
| * [https://www.wikipedia.org/wiki/PNG PNG] | ||
| ===例子=== | ||
| <gallery> | ||
| File:en/Manual/Heightmap img.png|If you would create heightmap from this file... | ||
| File:en/Manual/Heightmap map.png|... this is what you would get | ||
| </gallery> | ||
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| ==灰阶表== | ||
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| NOTE: Since r27010 OpenTTD has supported height levels of up to 255 (Including Sea Level); and the 8-bit palette is not forced into generating the 16 levels below. | ||
| This table is therefore defunct when more than 16 height levels are enabled. | ||
| The range of colours between levels now splits according to 255/n where "n" is the number of height levels specified in the settings... Or Value * height_levels / 255, (255 being the limit of an 8 bit value)... | ||
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| {| | ||
| ! hex | ||
| ! elevation | ||
| |- | ||
| | 00 - 0F | ||
| | 0m (sea) | ||
| |- | ||
| | 10 - 1F | ||
| | 30m | ||
| |- | ||
| | 20 - 2F | ||
| | 70m | ||
| |- | ||
| | 30 - 3F | ||
| | 100m | ||
| |- | ||
| | 40 - 4F | ||
| | 130m | ||
| |- | ||
| | 50 - 5F | ||
| | 170m | ||
| |- | ||
| | 60 - 6F | ||
| | 200m | ||
| |- | ||
| | 70 - 7F | ||
| | 230m | ||
| |- | ||
| | 80 - 8F | ||
| | 270m | ||
| |- | ||
| | 90 - 9F | ||
| | 300m | ||
| |- | ||
| | A0 - AF | ||
| | 330m | ||
| |- | ||
| | B0 - BF | ||
| | 370m | ||
| |- | ||
| | C0 - CF | ||
| | 400m | ||
| |- | ||
| | D0 - DF | ||
| | 430m | ||
| |- | ||
| | E0 - EF | ||
| | 470m | ||
| |- | ||
| | F0 - FF | ||
| | 500m | ||
| |} | ||
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| ==外部链接== | ||
| *[http://www.tt-forums.net/viewtopic.php?t=27052 How To: Generate Superb Heightmaps :)] | ||
| *[http://www.tt-forums.net/download/file.php?id=92633 Updated version (Jun 2008) of the HowTo by sootynz (Word Document)] | ||
| *[http://www.tt-forums.net/viewtopic.php?t=29323 Heightmaps (available and on request) on the Forum] | ||
| *[https://github.com/bunburya/bother Bother - a tool to generate heightmaps from real-world elevation data] |