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[等角地图瓷砖：1:1比率][SA Pixel Tutorial] 作者：Karen [www.spriteart.com] 译者：狂人=Madman=

开始之前，我假定你已经阅读过“标准的等角瓷砖教程”了，这种风格普遍的应用在大量的流行作品和游戏世界中。

本教程介绍少见的斜45度等角瓷砖制作技法，我希望能够讲得比较全面。为了方便你的学习我提供了大量范例。印象中有一个使用这种透视的游戏，那就是 Konami 在 GBA 上的杰作《Boktai: The Sun is in Your Hands》。观察这款游戏的屏幕截图，其透视简直是难以忍受（不可思议），基本为“等角透视”；透视线无法相交于一个灭点（按照物理学的规则，现实中的透视是有灭点的）。

诚然，由于水平和垂直角的比率相同，为 1:1，这个透视法要比“标准的等角透视”简单的多。我们进入细节来看是什么使它这么简单化。

从一个基本瓷砖开始。尺寸是 32x32 ，各处的同向水平垂直距离相同。每个角尖部都是 2 个像素，这个和“标准的等角瓷砖”不同。

基本等角块的示例在这里，上面还标记了半块的位置。与标准瓷砖相同，半块 和 整块 的垂直像素相差为 8 个像素。 这种类型的等角瓷砖表面拼接很简单。由于是完美的菱角，没有任何重叠，拼接不会出现任何错误。拼接的时候水平和垂直不会出现，例图就拼接出了完美的 64x64 大小，所有数据都可以被 8 除尽。如果你拼出的地图尺寸不能被 8 除尽，那你肯定是哪里拼错了。 我们看看 1:1 等角地图的基本建筑块。第一个例子是一个等角堆。上面的瓷砖很简单，可四等分为 16x16 的瓷砖，保持 1:1 的纵横比，水平倾斜为 1 。尽管我们的等角堆看起来有些怪。如果我需要插入瓷砖表现想要多高都可以的墙，我会绘制一块大小至少为 16x8 的特殊瓷砖，来达到这个要求。这种特殊的瓷砖在标准的瓷砖块中本来就存在可以直接切割，但是我们的1:1 等角块，就要纵向加长，产生一块完全独特的瓷砖。

If you were to break a half block into tiles, as you can imagine on the top illustration with the white box of 16x8 dimension, a similar meta tile common in the standard isometric view would be applicable to hold that data, as opposed to making it a 16x16 tile block that consisted of 3/4 floor area. Also note, that in general, these 16x16 blocks might even be compressed further with a tool that could break a tileset up into 8x8 blocks and test for repetition of unique tiles. Once again, this is an engineering issue, and will not be further discussed in this tutorial.

Lets look at a situation where two floor textures would meet. The four corners consisting of 16x16 tiles would be required to make the floor textures meet at each quadrant, assuming that you only have 1 tile layer to work with (if not the case, you might want to consider layering and using transparencies to hold the unknown data for overlapping textures, as mentioned previously in this tutorial and heavily in the standard isometric tile tutorial). Note that the minimal amount of 16x16 tiles needed to repeat a single floor texture is 2 tiles, as shown in the bottom illustration with the white bounding boxes. This "4 tiles required for merging textures, 2 tiles required for a single texture" theme is the same for both 1:1 and 2:1 isometric viewpoints, only difference being the actual meta tile dimensions. Thats it for 1:1 isometric tiling technicalities. look for the map building tutorial to put all this great info to good use!