fault in 3d surface draw.

alirezagholamian shared this question 1 week ago
Answered

hi everybody

in attach file i draw serface b: z = sqrt((-1)^floor(x) (-1)^floor(y)) sqrt(16 - x² - y²) but not exact . why? or how i can correct it?

thanks

Files: 3d.ggb

Comments (2)

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1

the account of points needed for more accuracy is out of the default settings of GG.

you will need more points

try

m1 = Sequence(Sequence(If(k ≤ x ≤ k + 1 ∧ j ≤ y ≤ j + 1 ∧ Mod(k + j, 2) ≟ 0, sqrt(16 - x² - y²)), k, -4, 4), j, -4, 4)

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1

this is nice and exact.

thanks mathmagic

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