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refactored

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Justin Lin
2017-05-25 09:39:36 +08:00
parent e02721ade4
commit 2335ee8268
2 changed files with 42 additions and 39 deletions
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40
src/__private__/__shape_arc.scad Normal file
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@@ -0,0 +1,40 @@
function __edge_r_begin(orig_r, a, a_step, m) =
let(leng = orig_r * cos(a_step / 2))
leng / cos((m - 0.5) * a_step - a);
function __edge_r_end(orig_r, a, a_step, n) =
let(leng = orig_r * cos(a_step / 2))
leng / cos((n + 0.5) * a_step - a);
function __shape_arc(radius, angle, width, width_mode = "LINE_CROSS") =
let(
w_offset = width_mode == "LINE_CROSS" ? [width / 2, -width / 2] : (
width_mode == "LINE_INWARD" ? [0, -width] : [width, 0]
),
frags = __frags(radius),
a_step = 360 / frags,
half_a_step = a_step / 2,
angles = __is_vector(angle) ? angle : [0, angle],
m = floor(angles[0] / a_step) + 1,
n = floor(angles[1] / a_step),
r_outer = radius + w_offset[0],
r_inner = radius + w_offset[1],
points = concat(
// outer arc path
[__ra_to_xy(__edge_r_begin(r_outer, angles[0], a_step, m), angles[0])],
m > n ? [] : [
for(i = [m:n])
__ra_to_xy(r_outer, a_step * i)
],
angles[1] == a_step * n ? [] : [__ra_to_xy(__edge_r_end(r_outer, angles[1], a_step, n), angles[1])],
// inner arc path
angles[1] == a_step * n ? [] : [__ra_to_xy(__edge_r_end(r_inner, angles[1], a_step, n), angles[1])],
m > n ? [] : [
for(i = [m:n])
let(idx = (n + (m - i)))
__ra_to_xy(r_inner, a_step * idx)
],
[__ra_to_xy(__edge_r_begin(r_inner, angles[0], a_step, m), angles[0])]
)
) points;

41
src/shape_arc.scad
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@@ -15,44 +15,7 @@
include <__private__/__frags.scad>; include <__private__/__frags.scad>;
include <__private__/__is_vector.scad>; include <__private__/__is_vector.scad>;
include <__private__/__ra_to_xy.scad>; include <__private__/__ra_to_xy.scad>;
include <__private__/__shape_arc.scad>;
function __edge_r_begin(orig_r, a, a_step, m) =
let(leng = orig_r * cos(a_step / 2))
leng / cos((m - 0.5) * a_step - a);
function __edge_r_end(orig_r, a, a_step, n) =
let(leng = orig_r * cos(a_step / 2))
leng / cos((n + 0.5) * a_step - a);
function shape_arc(radius, angle, width, width_mode = "LINE_CROSS") = function shape_arc(radius, angle, width, width_mode = "LINE_CROSS") =
let( __shape_arc(radius, angle, width, width_mode);
w_offset = width_mode == "LINE_CROSS" ? [width / 2, -width / 2] : (
width_mode == "LINE_INWARD" ? [0, -width] : [width, 0]
),
frags = __frags(radius),
a_step = 360 / frags,
half_a_step = a_step / 2,
angles = __is_vector(angle) ? angle : [0, angle],
m = floor(angles[0] / a_step) + 1,
n = floor(angles[1] / a_step),
r_outer = radius + w_offset[0],
r_inner = radius + w_offset[1],
points = concat(
// outer arc path
[__ra_to_xy(__edge_r_begin(r_outer, angles[0], a_step, m), angles[0])],
m > n ? [] : [
for(i = [m:n])
__ra_to_xy(r_outer, a_step * i)
],
angles[1] == a_step * n ? [] : [__ra_to_xy(__edge_r_end(r_outer, angles[1], a_step, n), angles[1])],
// inner arc path
angles[1] == a_step * n ? [] : [__ra_to_xy(__edge_r_end(r_inner, angles[1], a_step, n), angles[1])],
m > n ? [] : [
for(i = [m:n])
let(idx = (n + (m - i)))
__ra_to_xy(r_inner, a_step * idx)
],
[__ra_to_xy(__edge_r_begin(r_inner, angles[0], a_step, m), angles[0])]
)
) points;