Wrong Voxel Viewer Cos coeffs ?

Andrei Talapov

Prodigy 60 points

Document sbas703a claims that cos coefficients should be given by the next formula:

cos_fx_qn_coeff=32767*Cos(2*p/N), which disagrees with the screenshot of Voxel Viewer attached here.

Any explanation?

over 8 years ago

0 Anand Gadiyar over 8 years ago

TI__Genius 15005 points

For f2, by default N is 3.

0 Andrei Talapov over 8 years ago in reply to Anand Gadiyar

Prodigy 60 points

Voxel Viewer shows quad_cnt_max=6. So, you mean the statement "N is the number of quads (same as quad_cnt_max)" on page 31 of sbas703a is wrong?

0 Anand Gadiyar over 8 years ago in reply to Andrei Talapov

TI__Genius 15005 points

The quad angles for F2 are not the same as that for F1. The number of quads is indeed set by quad_cnt_max, but the angles are not.

Also, you would not normally need to change the sin and cos coefficients. The defaults are correct for 4 quads without dealiasing and 6 quads with dealiasing.

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Wrong Voxel Viewer Cos coeffs ?