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Removed the belt gap options and changed the tests to use open loops instead.

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Note previous belt lengths were incorrect with negative turns.
Fixed spelling typos.
_belt_length() no longer needs belt type.
Uptated images and readme.
This commit is contained in:
Chris Palmer
2021-03-14 18:53:37 +00:00
parent 42e03679b4
commit 9ded315801
11 changed files with 123 additions and 94 deletions
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11
utils/rounded_polygon.scad
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@@ -37,7 +37,7 @@ function circle_tangent(p1, p2) = //! Compute the clockwise tangent between two
v = [cos(theta), sin(theta)]
)[ p1 + r1 * v, p2 + r2 * v ];
function rounded_polygon_arcs(points, tangents) = //! Compute the arcs at the points, for each point [angle,rotate_angle,length]
function rounded_polygon_arcs(points, tangents) = //! Compute the arcs at the points, for each point [angle, rotate_angle, length]
let(
len = len(points)
) [ for (i = [0: len-1])
@@ -49,12 +49,12 @@ function rounded_polygon_arcs(points, tangents) = //! Compute the arcs at the po
v2 = p2 - p,
sr = points[i][2],
r = abs(sr),
a = r < 0.001 ? 0 : let( aa = acos((v1 * v2) / sqr(r)) ) cross(v1, v2)*sign(sr) <= 0 ? aa : 360 - aa,
a = r < 0.001 ? 0 : let( aa = acos((v1 * v2) / sqr(r)) ) cross(v1, v2) * sign(sr) <= 0 ? aa : 360 - aa,
l = PI * a * r / 180,
v0 = [r, 0],
v = let (
vv = norm(v0-v2) < 0.001 ? 0 : abs(v2.y) < 0.001 ? 180 :
let( aa = acos((v0 * v2) / sqr(r)) ) cross(v0, v2)*sign(sr) <= 0 ? aa : 360 - aa
vv = norm(v0 - v2) < 0.001 ? 0 : abs(v2.y) < 0.001 ? 180 :
let( aa = acos((v0 * v2) / sqr(r)) ) cross(v0, v2) * sign(sr) <= 0 ? aa : 360 - aa
) sr > 0 ? 360 - vv : vv - a
) [a, v, l]
];
@@ -84,6 +84,7 @@ module rounded_polygon(points, _tangents = undef) { //! Draw the rounded polygon
hull() {
translate([points[i].x, points[i].y])
circle(points[i][2]);
polygon([tangents[(2 * i - 1 + 2 * len) % (2 * len)], tangents[2 * i], [points[i].x, points[i].y]]);
}
@@ -95,7 +96,7 @@ module rounded_polygon(points, _tangents = undef) { //! Draw the rounded polygon
translate([points[i].x, points[i].y])
circle(-points[i][2]);
polygon([tangents[(2 * i - 1 + 2 * len) % (2 *len)], tangents[2 * i], [points[i].x, points[i].y]]);
polygon([tangents[(2 * i - 1 + 2 * len) % (2 * len)], tangents[2 * i], [points[i].x, points[i].y]]);
}
}
}