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Fix .binvox files being saved with the inverse scale #4710

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According to the binvox specification the scale stored in binvox should be what the normalized voxel coordinates (in the interval [0, 1]) should be scaled by.

binvox now includes two extra lines in the header (which may be omitted, viewvox and thinvox don't need them):
translate <t_x> <t_y> <t_z>
scale <scale factor>
First scale (x_n, y_n, z_n) by the scale factor, then translate them by (t_x, t_y, t_z)

This is also how the scale is interpreted in this Python binvox implementation.

How Has This Been Tested?

Tested by using other implementations to read the resulting .binvox files.

According to the specification the scale stored in binvox should be what
the normalized voxel coordinates (in the interval [0, 1]) should be
scaled by.

https://www.patrickmin.com/binvox/binvox.html
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