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Remove start/end angle, do substantial cleanup

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This commit is contained in:
Ian Gulliver
2016-11-08 18:27:03 -06:00
parent 86d96dff17
commit 75d15d5364
1 changed files with 51 additions and 59 deletions
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74
fcad.scad
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@@ -1,4 +1,4 @@
fDraw(fSphere(5));
fDraw(fSphere(10));
///// Drawing modules
module fDraw(model) {
@@ -45,59 +45,40 @@ function fCube(dims) = (
]
);
function fCylinder(r, h, start_angle=0, end_angle=360, sides=36) = (
let(degrees_per_face = (end_angle - start_angle) / sides,
face_range = [0 : sides - 1],
vertical_range = [0 : sides],
complete = (start_angle == 0 && end_angle == 360),
bottom_index = (sides + 1) * 2)
function fCylinder(h, r, sides=36) = (
let(degrees_per_side = 360 / sides,
side_range = [0 : sides - 1])
[
[fKeyPoints, concat(
[fKeyPoints,
fCartesianProduct([
[for (i = vertical_range)
let (angle = start_angle + (i * degrees_per_face))
[for (side = side_range)
let (angle = side * degrees_per_side)
[r * sin(angle), r * cos(angle)]],
[0, h],
]),
complete ? [] : [
[0, 0, 0], // bottom center
[0, 0, h], // top center
]
)],
],
[fKeyFaces, concat(
// bottom
[concat(
[for (i = [sides : -1 : 0]) i * 2],
complete ? [] : [bottom_index]
)],
[[for (side = [sides : -1 : 0]) side * 2]],
// top
[concat(
[for (i = [0 : sides]) i * 2 + 1],
complete ? [] : [bottom_index + 1]
)],
[[for (side = [0 : sides]) side * 2 + 1]],
// sides
[for (i = face_range)
[for (j = [2, 3, 1, 0]) i * 2 + j]],
// cut ins
complete ? [] : [
[0, 1, bottom_index + 1, bottom_index],
[bottom_index - 1, bottom_index - 2, bottom_index, bottom_index + 1],
]
[for (side = side_range)
[for (vertex = [2, 3, 1, 0]) (side * 2 + vertex) % (sides * 2)]]
)],
]
);
function fSphere(r, sides=36, stripes=18) = (
let(stripe_slice = 180 / stripes,
side_slice = 360 / sides,
top_index = (stripes - 1) * sides,
bottom_index = top_index + 1)
let(degrees_per_slice = 180 / stripes,
degrees_per_side = 360 / sides,
top_index = (stripes - 1) * sides)
[
[fKeyPoints, concat(
[for (stripe_index = [1 : stripes - 1])
for (side_index = [0 : sides - 1])
let (stripe_angle = stripe_index * stripe_slice,
side_angle = side_index * side_slice,
let (stripe_angle = stripe_index * degrees_per_slice,
side_angle = side_index * degrees_per_side,
stripe_radius = r * sin(stripe_angle),
stripe_z = r * cos(stripe_angle),
side_x = stripe_radius * sin(side_angle),
@@ -110,23 +91,34 @@ function fSphere(r, sides=36, stripes=18) = (
]
)],
[fKeyFaces, concat(
// side squares
[for (stripe_index = [2 : stripes - 1])
for (side_index = [0 : sides - 1])
let (prev_side_base = (stripe_index - 2) * sides,
side_base = (stripe_index - 1) * sides)
[prev_side_base + (side_index + 1) % sides,
[
prev_side_base + (side_index + 1) % sides,
prev_side_base + side_index,
side_base + side_index,
side_base + (side_index + 1) % sides]
side_base + (side_index + 1) % sides,
]
],
// top triangles
[for (side_index = [0 : sides - 1])
[top_index, side_index, (side_index + 1) % sides]
[
top_index,
side_index,
(side_index + 1) % sides,
]
],
// bottom triangles
[for (side_index = [0 : sides - 1])
let (side_base = (stripes - 2) * sides)
[bottom_index,
[
top_index + 1,
side_base + (side_index + 1) % sides,
side_base + side_index]
side_base + side_index,
]
]
)],
]