如何读取这些紫外线坐标？

我正在尝试从1997年的赛车游戏（测试驱动器4）中对3D模型（汽车）进行反向工程。我能够提取3D网格和纹理，但无法弄清楚UV贴图的工作原理。

每辆车只有一个文件，其中包含所有内容（3D模型，纹理，仪表板，调整，等等。）。 3D模型部分包含一个顶点列表和多边形列表。单个多边形如下所示：我发现6字节的unknown部分包含UV数据，因为修改这些值时游戏中存在明显差异。它的长度为6个字节，因此可以为3个顶点中的每个顶点保留一个U＆V值。但是，我绝对不知道如何解释这些数字。我尝试将它们读取为字节并除以255，以将其转换为0到1的浮点数，但没有成功。它们可能是8位浮点数吗？（我不知道这些是如何工作的，所以不能确定。）

下面是80个多边形的十六进制转储（每行一个）。

Triangle
{
    ulong       beg = 0xffff0000
    ushort      texture     // 0 = car bottom, 3 = body
    ubyte[6]    unknown     // UV mapping???
    ulong[3]    vertices    // Indices
    ulong       end = 0x00000000
}

如果需要，我可以发布完整的文件结构。在此先谢谢您！

编辑： br />

FF FF 00 00 03 00 7B 7B 7D AD BE AD 00 00 00 00 01 00 00 00 02 00 00 00 00 00 00 00
FF FF 00 00 03 00 7B 7D 7D BE BE AD 01 00 00 00 03 00 00 00 02 00 00 00 00 00 00 00
FF FF 00 00 03 00 3E 1C 3E BE BE C9 04 00 00 00 05 00 00 00 06 00 00 00 00 00 00 00
FF FF 00 00 03 00 1C 1C 3E BE CB C9 05 00 00 00 07 00 00 00 06 00 00 00 00 00 00 00
FF FF 00 00 03 00 7B 7B 7D AD BE AD 08 00 00 00 09 00 00 00 0A 00 00 00 00 00 00 00
FF FF 00 00 03 00 7B 7D 7D BE BE AD 09 00 00 00 0B 00 00 00 0A 00 00 00 00 00 00 00
FF FF 00 00 03 00 09 09 02 AC 9E AC 0C 00 00 00 0D 00 00 00 0E 00 00 00 00 00 00 00
FF FF 00 00 03 00 09 00 02 9E 9E AC 0D 00 00 00 0F 00 00 00 0E 00 00 00 00 00 00 00
FF FF 00 00 00 00 A0 A7 A0 1D 1D 00 10 00 00 00 11 00 00 00 12 00 00 00 00 00 00 00
FF FF 00 00 00 00 A7 A7 A0 1D 00 00 11 00 00 00 13 00 00 00 12 00 00 00 00 00 00 00
FF FF 00 00 03 00 45 45 67 3F 48 3F 14 00 00 00 15 00 00 00 01 00 00 00 00 00 00 00
FF FF 00 00 03 00 44 44 46 5B 5B 48 16 00 00 00 17 00 00 00 18 00 00 00 00 00 00 00
FF FF 00 00 03 00 44 47 46 5B 49 48 17 00 00 00 19 00 00 00 18 00 00 00 00 00 00 00
FF FF 00 00 00 00 92 97 98 1D 1D 1A 1A 00 00 00 17 00 00 00 16 00 00 00 00 00 00 00
FF FF 00 00 03 00 00 19 19 7B 7E 60 1B 00 00 00 00 00 00 00 1C 00 00 00 00 00 00 00
FF FF 00 00 03 00 46 44 29 47 5B 4A 19 00 00 00 17 00 00 00 1D 00 00 00 00 00 00 00
FF FF 00 00 03 00 44 2B 29 5B 5C 4A 17 00 00 00 1A 00 00 00 1D 00 00 00 00 00 00 00
FF FF 00 00 00 00 98 97 92 03 00 00 1E 00 00 00 1F 00 00 00 20 00 00 00 00 00 00 00
FF FF 00 00 03 00 3E 3E 2D BE BB BE 14 00 00 00 1B 00 00 00 21 00 00 00 00 00 00 00
FF FF 00 00 03 00 3E 2D 2D BB BC BE 1B 00 00 00 22 00 00 00 21 00 00 00 00 00 00 00
FF FF 00 00 03 00 2D 2D 1C 90 81 90 23 00 00 00 24 00 00 00 25 00 00 00 00 00 00 00
FF FF 00 00 03 00 2D 1C 1C 81 81 90 24 00 00 00 26 00 00 00 25 00 00 00 00 00 00 00
FF FF 00 00 03 00 2D 2D 18 BE BC BE 21 00 00 00 22 00 00 00 27 00 00 00 00 00 00 00
FF FF 00 00 03 00 2D 18 18 BC BB BE 22 00 00 00 28 00 00 00 27 00 00 00 00 00 00 00
FF FF 00 00 03 00 1C 1C 09 90 81 90 25 00 00 00 26 00 00 00 29 00 00 00 00 00 00 00
FF FF 00 00 03 00 1C 12 09 81 82 90 26 00 00 00 2A 00 00 00 29 00 00 00 00 00 00 00
FF FF 00 00 00 00 92 92 91 07 00 00 2B 00 00 00 20 00 00 00 2C 00 00 00 00 00 00 00
FF FF 00 00 03 00 18 18 11 BD BB BD 27 00 00 00 28 00 00 00 2D 00 00 00 00 00 00 00
FF FF 00 00 03 00 18 11 11 BB BB BD 28 00 00 00 2E 00 00 00 2D 00 00 00 00 00 00 00
FF FF 00 00 03 00 03 0B 0C 86 8E 7F 2F 00 00 00 29 00 00 00 30 00 00 00 00 00 00 00
FF FF 00 00 03 00 0B 13 0C 8E 81 7F 29 00 00 00 2A 00 00 00 30 00 00 00 00 00 00 00
FF FF 00 00 03 00 0D 0C 00 4D 57 57 31 00 00 00 32 00 00 00 33 00 00 00 00 00 00 00
FF FF 00 00 00 00 83 81 87 03 07 01 34 00 00 00 35 00 00 00 36 00 00 00 00 00 00 00
FF FF 00 00 00 00 81 87 87 07 07 01 35 00 00 00 37 00 00 00 36 00 00 00 00 00 00 00
FF FF 00 00 03 00 5D 5E 3F BD AD BD 38 00 00 00 39 00 00 00 03 00 00 00 00 00 00 00
FF FF 00 00 03 00 5E 3F 3F AD AD BD 39 00 00 00 02 00 00 00 03 00 00 00 00 00 00 00
FF FF 00 00 03 00 7C 5E 7C AD AD BD 3A 00 00 00 39 00 00 00 3B 00 00 00 00 00 00 00
FF FF 00 00 03 00 5E 5D 7C AD BD BD 39 00 00 00 38 00 00 00 3B 00 00 00 00 00 00 00
FF FF 00 00 00 00 AA AA AB 16 1D 1E 3C 00 00 00 3D 00 00 00 3E 00 00 00 00 00 00 00
FF FF 00 00 00 00 BC BA B5 06 01 08 3F 00 00 00 40 00 00 00 41 00 00 00 00 00 00 00
FF FF 00 00 00 00 BA B5 B5 01 00 08 40 00 00 00 42 00 00 00 41 00 00 00 00 00 00 00
FF FF 00 00 03 00 5D 5D 43 0C 1B 0C 43 00 00 00 44 00 00 00 45 00 00 00 00 00 00 00
FF FF 00 00 03 00 5D 48 43 1B 1B 0C 44 00 00 00 46 00 00 00 45 00 00 00 00 00 00 00
FF FF 00 00 03 00 7B 59 7B BF BF C9 3B 00 00 00 05 00 00 00 3A 00 00 00 00 00 00 00
FF FF 00 00 03 00 59 5A 7B BF C9 C9 05 00 00 00 47 00 00 00 3A 00 00 00 00 00 00 00
FF FF 00 00 03 00 00 00 1C DC F7 CB 48 00 00 00 40 00 00 00 07 00 00 00 00 00 00 00
FF FF 00 00 03 00 00 1C 1C F7 F3 CB 40 00 00 00 3F 00 00 00 07 00 00 00 00 00 00 00
FF FF 00 00 03 00 5F 3F 1C F2 EB F2 49 00 00 00 4A 00 00 00 3F 00 00 00 00 00 00 00
FF FF 00 00 03 00 7D 7D 60 DC C3 CE 43 00 00 00 4B 00 00 00 4C 00 00 00 00 00 00 00
FF FF 00 00 03 00 7D 5F 60 C3 BE CE 4B 00 00 00 4D 00 00 00 4C 00 00 00 00 00 00 00
FF FF 00 00 03 00 04 0C 0B B7 BE AF 4E 00 00 00 2D 00 00 00 0C 00 00 00 00 00 00 00
FF FF 00 00 03 00 0C 13 0B BE BC AF 2D 00 00 00 2E 00 00 00 0C 00 00 00 00 00 00 00
FF FF 00 00 03 00 7D 62 73 00 00 13 2F 00 00 00 33 00 00 00 4F 00 00 00 00 00 00 00
FF FF 00 00 03 00 62 5F 73 00 13 13 33 00 00 00 50 00 00 00 4F 00 00 00 00 00 00 00
FF FF 00 00 03 00 73 5E 73 1F 1F 2B 0F 00 00 00 51 00 00 00 0E 00 00 00 00 00 00 00
FF FF 00 00 03 00 5E 5F 73 1F 2B 2B 51 00 00 00 35 00 00 00 0E 00 00 00 00 00 00 00
FF FF 00 00 03 00 5E 5D 3F AD BD AD 52 00 00 00 53 00 00 00 08 00 00 00 00 00 00 00
FF FF 00 00 03 00 5D 3F 3F BD BD AD 53 00 00 00 09 00 00 00 08 00 00 00 00 00 00 00
FF FF 00 00 00 00 A7 AA AA 1D 1D 16 11 00 00 00 3D 00 00 00 3C 00 00 00 00 00 00 00
FF FF 00 00 00 00 B5 B5 B4 08 00 00 41 00 00 00 42 00 00 00 54 00 00 00 00 00 00 00
FF FF 00 00 03 00 43 48 5D 0C 1B 0C 54 00 00 00 42 00 00 00 48 00 00 00 00 00 00 00
FF FF 00 00 03 00 48 5D 5D 1B 1B 0C 42 00 00 00 40 00 00 00 48 00 00 00 00 00 00 00
FF FF 00 00 03 00 7C 5D 7C BD BD AD 4B 00 00 00 53 00 00 00 55 00 00 00 00 00 00 00
FF FF 00 00 03 00 5D 5E 7C BD AD AD 53 00 00 00 52 00 00 00 55 00 00 00 00 00 00 00
FF FF 00 00 03 00 19 18 2D 7F 82 7F 56 00 00 00 26 00 00 00 57 00 00 00 00 00 00 00
FF FF 00 00 03 00 18 2D 2D 82 82 7F 26 00 00 00 24 00 00 00 57 00 00 00 00 00 00 00
FF FF 00 00 03 00 10 12 19 7F 82 7F 30 00 00 00 2A 00 00 00 56 00 00 00 00 00 00 00
FF FF 00 00 03 00 12 18 19 82 82 7F 2A 00 00 00 26 00 00 00 56 00 00 00 00 00 00 00
FF FF 00 00 00 00 87 87 87 16 1C 1C 58 00 00 00 32 00 00 00 31 00 00 00 00 00 00 00
FF FF 00 00 03 00 06 07 1E 32 0B 3B 59 00 00 00 5A 00 00 00 5B 00 00 00 00 00 00 00
FF FF 00 00 03 00 07 1E 1E 0B 04 3B 5A 00 00 00 1C 00 00 00 5B 00 00 00 00 00 00 00
FF FF 00 00 03 00 1C 1C 2D AC BB AC 5C 00 00 00 28 00 00 00 5D 00 00 00 00 00 00 00
FF FF 00 00 03 00 1C 2D 2D BB BC AC 28 00 00 00 22 00 00 00 5D 00 00 00 00 00 00 00
FF FF 00 00 03 00 09 12 1C AC BB AC 0C 00 00 00 2E 00 00 00 5C 00 00 00 00 00 00 00
FF FF 00 00 03 00 12 1C 1C BB BB AC 2E 00 00 00 28 00 00 00 5C 00 00 00 00 00 00 00
FF FF 00 00 03 00 1C 1C 09 9E 90 9E 5E 00 00 00 25 00 00 00 0D 00 00 00 00 00 00 00
FF FF 00 00 03 00 1C 09 09 90 90 9E 25 00 00 00 29 00 00 00 0D 00 00 00 00 00 00 00
FF FF 00 00 03 00 2D 2D 1C 9E 90 9E 5F 00 00 00 23 00 00 00 5E 00 00 00 00 00 00 00
FF FF 00 00 03 00 2D 1C 1C 90 90 9E 23 00 00 00 25 00 00 00 5E 00 00 00 00 00 00 00
FF FF 00 00 03 00 3D 2D 2D 90 90 9E 59 00 00 00 23 00 00 00 5F 00 00 00 00 00 00 00

这看起来像一个四边形序列，一点点外推使我假设unknown [0]和unknown [3]属于顶点1，unknown [1]和unknown [4]属于顶点2，unknown [2]和unknown [5]属于顶点3

@ratchetfreak是的，我已经尝试了所有可能的组合，但是没有正确的选择。当我按照您提到的顺序或任何其他顺序转换它们（除以255）时，我得到了很多不合理的数字（例如0.666667）。

那么为什么UV坐标不能不为2/3？

@Jongware可以，但是在这种情况下UV坐标是错误的（我在3D建模软件中进行了检查）。

也许它们是另一个缓冲区的索引？

#1 楼

问题解决了！

我发现unknown值实际上是纹理贴图上的像素坐标（正整数）。汽车的纹理尺寸为128 x 256，因此通过将每个U或V坐标除以该方向上的最大值，我们可以进行正确的浮点转换：此外，我的转换器中存在一些错误，阻止了此操作...

编程黑洞网

如何读取这些紫外线坐标？

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#1 楼