From 903536ea0b57700c832705233be45d28bde4a252 Mon Sep 17 00:00:00 2001
From: ZhugeBright <zhugebright@users.noreply.github.com>
Date: Sun, 16 Feb 2025 08:13:55 +0000
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+[[Translation:en/Manual/Heightmap]]
+
+{{zh/翻译|origin= en/Manual/Heightmap| from=en | to=zh | Percentage=0}} 
+
+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]).
+
+==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.
+
+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.
+
+Since edges of the map must be at sea level, at least one tile, the heightmap border can be seen as 2 pixels wide.
+
+===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>
+
+==灰阶表==
+
+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)...
+
+{|
+! 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
+|}
+
+==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]
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