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update doc

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Justin Lin
2022-04-04 16:31:44 +08:00
parent 438e9cfd93
commit d90b0c20fc
1 changed files with 14 additions and 17 deletions
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9
docs/lib3x-sf_thickenT.md
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@@ -14,17 +14,15 @@ It thickens a surface with triangular mesh.
use <surface/sf_thickenT.scad>; use <surface/sf_thickenT.scad>;
radius = 100; radius = 100;
width = 2;
thickness = .2; thickness = .2;
a_step = 10; a_step = 10;
r_step = 0.2; r_step = 0.2;
function f(x, y) = (pow(y,2)/pow(2, 2))-(pow(x,2)/pow(2, 2)); function f(x, y) = (y^2 - x^2) / 4;
points = [ points = [
for(a = [a_step:a_step:360]) for(a = [a_step:a_step:360], r = [r_step:r_step:2])
for(r = [r_step:r_step:2])
let( let(
x = round(r * cos(a) * 100) / 100, x = round(r * cos(a) * 100) / 100,
y = round(r * sin(a) * 100) / 100 y = round(r * sin(a) * 100) / 100
@@ -44,8 +42,7 @@ It thickens a surface with triangular mesh.
thickness = .2; thickness = .2;
points = [ points = [
for(u = [0:u_step:360]) for(u = [0:u_step:360], v = [-1:v_step:1])
for(v = [-1:v_step:1])
let( let(
x = (1 + v / 2 * cos(u / 2)) * cos(u), x = (1 + v / 2 * cos(u / 2)) * cos(u),
y = (1 + v / 2 * cos(u / 2)) * sin(u), y = (1 + v / 2 * cos(u / 2)) * sin(u),