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Partially slice 3D rendered donut along its torodial direction

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Nils Dagsson Moskopp 2023-10-16 19:08:14 +02:00
parent ef65de54c0
commit 0c6d9a4d85
Signed by untrusted user who does not match committer: erle
GPG Key ID: A3BC671C35191080
1 changed files with 7 additions and 1 deletions
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donut.lua
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@ -43,7 +43,13 @@ function render_frame(A, B)
local sinB = math.sin(B)
-- theta goas around the cross-sectional circle of a torus
for theta=0, 2*math.pi, theta_spacing do
local theta = 0
while theta <= 2*math.pi do
if ( theta < 2*math.pi * 1/8 ) or ( theta > 2*math.pi * 7/8 ) then
theta = theta + (theta_spacing * 16)
else
theta = theta + theta_spacing
end
-- precompute sines and cosines of theta
local costheta = math.cos(theta)
local sintheta = math.sin(theta)