| 5 Oct 2024 |
 3dlirious | * dia :: slider \[2,20\] = 12;
height :: slider \[2,20\] = 10;
rib\_width :: slider \[0.1,5\] = 4;
centre\_height :: slider \[0,0.999\] = 0.6;
rib\_num :: int\_slider \[10,30\] = 16;
in
let
pumpkin {d, height, centre\_height, rib\_width, rib\_num} =
let
R = d/2;
dx = rib\_width;
c = dx/2;
dz = height;
b = dz/2;
ctr\_h = centre\_height\*height/2; //mz
// Find dy based on centre_height
a = R/(1 + sqrt(b*b - ctr_h*ctr_h)/b);
dy = 2*a;
my = R - a;
// Find inner radius of ribs so we can hollow the pumpkin without cutting through
angle = pi/rib_num;
tan_a = tan angle;
a2tan2 = a*a*tan_a*tan_a;
// Solve quadratic equation
qa = a2tan2 + c*c;
qb = 2*a2tan2*my;
qc = a2tan2*my*my - a*a*c*c;
ny = (-qb + sqrt(qb*qb - 4*qa*qc))/(2*qa);
ridge_inner_rad = (my + ny)/cos angle;
// Minimum wall thickness of the pumpkin.
shell_min_thickness = 0.2;
pumpkin_body = ellipsoid [dx, dy, dz]
>> colour orange //(lib.web_colour.DarkOrange)
>> move.y (-my) >> repeat_radial rib_num
;
pumpkin_inside = spheroid.exact [2*(ridge_inner_rad - shell_min_thickness),
2*(ctr_h - shell_min_thickness)]
>> colour yellow;
// Stem
stem_out_dia = 2; //outer diameter
stem_ridge_dia = stem_out_dia/2;
stem_h = 4;
stem_bend_dia = 2*stem_h;
stem_bend_ang = 50*deg;
stem = circle stem_ridge_dia >> colour (lib.web_colour.DarkGreen)
>> move.y ((stem_ridge_dia - stem_out_dia)/2)
>> repeat_radial 7
>> reflect.y
>> extrude stem_h
>> local_taper {scale:[[1, 1], [0.5, 0.5]], range:[-stem_h/2,stem_h/2]}
>> about X_axis (bend {d:stem_bend_dia, angle:stem_bend_ang})
>> rotate.x (-stem_bend_ang/2)
>> move.y (stem_bend_dia/2 + stem_out_dia/2)
>> twist 0.3
>> move.z ctr_h
// Fix bbox!
;
whole = difference2.cmix [pumpkin_body, pumpkin_inside] >> into union [stem];
in whole;
face = union \[
triangle \[1,1\] >> move.x 1.5 >> mirror.x >> move.y 1.5,
triangle \[1,1\],
lib.shapes2d.moon {d:4, dx:1} >> rotate (pi/2) >> move.y (-0.5)
\]
\>> colour (lib.web\_colour.Goldenrod)
\>> extrude (dia)
\>> rotate.x (pi/2)
\>> bend {d:0, angle:55\*deg}
;
// Intersection and difference with colour mixing
intersection2 =
let
\_intersection3 mix list = reduce\[everything, \_intersection3b mix\] list;
\_intersection3b mix \[s1,s2\] =
make\_shape {
dist p : max\[s1.dist p, s2.dist p\],
colour p : if mix (
let d1 = s1.dist p;
d2 = s2.dist p;
in if (d2 \<= 0 || d2 \<= d1) s1.colour p else s2.colour p
)
else s1.colour p,
bbox : \[max\[s1.bbox.\[MIN\], s2.bbox.\[MIN\]\], min\[s1.bbox.\[MAX\], s2.bbox.\[MAX\]\]\],
is\_2d : s1.is\_2d && s2.is\_2d,
is\_3d : s1.is\_3d && s2.is\_3d,
};
in {
call : \_intersection3 false,
cmix : \_intersection3 true,
};
difference2 =
let
\_difference2 \[s1,s2\] = intersection2 \[s1, complement s2\];
\_difference2\_col \[s1,s2\] = intersection2.cmix \[s1, complement s2\];
in {
call : \_difference2,
cmix : \_difference2\_col,
};
in
difference2.cmix \[
pumpkin {d:dia, height:height, centre\_height:centre\_height, rib\_width:rib\_width, rib\_num:rib\_num},
face,
\]
> > rotate (10_deg) >> rotate.x (10_deg)
> > lib.utilities.face\_camera
> > //>> show\_axes
| 16:42:36 |
| 3dlirious | * dia :: slider \[2,20\] = 12;
height :: slider \[2,20\] = 10;
rib\_width :: slider \[0.1,5\] = 4;
centre\_height :: slider \[0,0.999\] = 0.6;
rib\_num :: int\_slider \[10,30\] = 16;
in
let
pumpkin {d, height, centre\_height, rib\_width, rib\_num} =
let
R = d/2;
dx = rib\_width;
c = dx/2;
dz = height;
b = dz/2;
ctr\_h = centre\_height\*height/2; //mz
// Find dy based on centre_height
a = R/(1 + sqrt(b*b - ctr_h*ctr_h)/b);
dy = 2*a;
my = R - a;
// Find inner radius of ribs so we can hollow the pumpkin without cutting through
angle = pi/rib_num;
tan_a = tan angle;
a2tan2 = a*a*tan_a*tan_a;
// Solve quadratic equation
qa = a2tan2 + c*c;
qb = 2*a2tan2*my;
qc = a2tan2*my*my - a*a*c*c;
ny = (-qb + sqrt(qb*qb - 4*qa*qc))/(2*qa);
ridge_inner_rad = (my + ny)/cos angle;
// Minimum wall thickness of the pumpkin.
shell_min_thickness = 0.2;
pumpkin_body = ellipsoid [dx, dy, dz]
>> colour orange //(lib.web_colour.DarkOrange)
>> move.y (-my) >> repeat_radial rib_num
;
pumpkin_inside = spheroid.exact [2*(ridge_inner_rad - shell_min_thickness),
2*(ctr_h - shell_min_thickness)]
>> colour yellow;
// Stem
stem_out_dia = 2; //outer diameter
stem_ridge_dia = stem_out_dia/2;
stem_h = 4;
stem_bend_dia = 2*stem_h;
stem_bend_ang = 50*deg;
stem = circle stem_ridge_dia >> colour (lib.web_colour.DarkGreen)
>> move.y ((stem_ridge_dia - stem_out_dia)/2)
>> repeat_radial 7
>> reflect.y
>> extrude stem_h
>> local_taper {scale:[[1, 1], [0.5, 0.5]], range:[-stem_h/2,stem_h/2]}
>> about X_axis (bend {d:stem_bend_dia, angle:stem_bend_ang})
>> rotate.x (-stem_bend_ang/2)
>> move.y (stem_bend_dia/2 + stem_out_dia/2)
>> twist 0.3
>> move.z ctr_h
// Fix bbox!
;
whole = difference2.cmix [pumpkin_body, pumpkin_inside] >> into union [stem];
in whole;
face = union \[
triangle \[1,1\] >> move.x 1.5 >> mirror.x >> move.y 1.5,
triangle \[1,1\],
lib.shapes2d.moon {d:4, dx:1} >> rotate (pi/2) >> move.y (-0.5)
\]
\>> colour (lib.web\_colour.Goldenrod)
\>> extrude (dia)
\>> rotate.x (pi/2)
\>> bend {d:0, angle:55\*deg}
;
// Intersection and difference with colour mixing
intersection2 =
let
\_intersection3 mix list = reduce\[everything, \_intersection3b mix\] list;
\_intersection3b mix \[s1,s2\] =
make\_shape {
dist p : max\[s1.dist p, s2.dist p\],
colour p : if mix (
let d1 = s1.dist p;
d2 = s2.dist p;
in if (d2 \<= 0 || d2 \<= d1) s1.colour p else s2.colour p
)
else s1.colour p,
bbox : \[max\[s1.bbox.\[MIN\], s2.bbox.\[MIN\]\], min\[s1.bbox.\[MAX\], s2.bbox.\[MAX\]\]\],
is\_2d : s1.is\_2d && s2.is\_2d,
is\_3d : s1.is\_3d && s2.is\_3d,
};
in {
call : \_intersection3 false,
cmix : \_intersection3 true,
};
difference2 =
let
\_difference2 \[s1,s2\] = intersection2 \[s1, complement s2\];
\_difference2\_col \[s1,s2\] = intersection2.cmix \[s1, complement s2\];
in {
call : \_difference2,
cmix : \_difference2\_col,
};
in
difference2.cmix \[
pumpkin {d:dia, height:height, centre\_height:centre\_height, rib\_width:rib\_width, rib\_num:rib\_num},
face,
\]
> > rotate (10_deg) >> rotate.x (10_deg)
> > lib.utilities.face\_camera
> > //>> show\_axes
| 16:43:15 |
| 3dlirious | * parametric
dia :: slider [2,20] = 12;
height :: slider [2,20] = 10;
rib_width :: slider [0.1,5] = 4;
centre_height :: slider [0,0.999] = 0.6;
rib_num :: int_slider [10,30] = 16;
in
let
pumpkin {d, height, centre_height, rib_width, rib_num} =
let
R = d/2;
dx = rib_width;
c = dx/2;
dz = height;
b = dz/2;
ctr_h = centre_height*height/2; //mz
// Find dy based on centre_height
a = R/(1 + sqrt(b*b - ctr_h*ctr_h)/b);
dy = 2*a;
my = R - a;
// Find inner radius of ribs so we can hollow the pumpkin without cutting through
angle = pi/rib_num;
tan_a = tan angle;
a2tan2 = a*a*tan_a*tan_a;
// Solve quadratic equation
qa = a2tan2 + c*c;
qb = 2*a2tan2*my;
qc = a2tan2*my*my - a*a*c*c;
ny = (-qb + sqrt(qb*qb - 4*qa*qc))/(2*qa);
ridge_inner_rad = (my + ny)/cos angle;
// Minimum wall thickness of the pumpkin.
shell_min_thickness = 0.2;
pumpkin_body = ellipsoid [dx, dy, dz]
>> colour orange //(lib.web_colour.DarkOrange)
>> move.y (-my) >> repeat_radial rib_num
;
pumpkin_inside = spheroid.exact [2*(ridge_inner_rad - shell_min_thickness),
2*(ctr_h - shell_min_thickness)]
>> colour yellow;
// Stem
stem_out_dia = 2; //outer diameter
stem_ridge_dia = stem_out_dia/2;
stem_h = 4;
stem_bend_dia = 2*stem_h;
stem_bend_ang = 50*deg;
stem = circle stem_ridge_dia >> colour (lib.web_colour.DarkGreen)
>> move.y ((stem_ridge_dia - stem_out_dia)/2)
>> repeat_radial 7
>> reflect.y
>> extrude stem_h
>> local_taper {scale:[[1, 1], [0.5, 0.5]], range:[-stem_h/2,stem_h/2]}
>> about X_axis (bend {d:stem_bend_dia, angle:stem_bend_ang})
>> rotate.x (-stem_bend_ang/2)
>> move.y (stem_bend_dia/2 + stem_out_dia/2)
>> twist 0.3
>> move.z ctr_h
// Fix bbox!
;
whole = difference2.cmix [pumpkin_body, pumpkin_inside] >> into union [stem];
in whole;
face = union [
triangle [1,1] >> move.x 1.5 >> mirror.x >> move.y 1.5,
triangle [1,1],
lib.shapes2d.moon {d:4, dx:1} >> rotate (pi/2) >> move.y (-0.5)
]
>> colour (lib.web_colour.Goldenrod)
>> extrude (dia)
>> rotate.x (pi/2)
>> bend {d:0, angle:55*deg}
;
// Intersection and difference with colour mixing
intersection2 =
let
_intersection3 mix list = reduce[everything, _intersection3b mix] list;
_intersection3b mix [s1,s2] =
make_shape {
dist p : max[s1.dist p, s2.dist p],
colour p : if mix (
let d1 = s1.dist p;
d2 = s2.dist p;
in if (d2 <= 0 || d2 <= d1) s1.colour p else s2.colour p
)
else s1.colour p,
bbox : [max[s1.bbox.[MIN], s2.bbox.[MIN]], min[s1.bbox.[MAX], s2.bbox.[MAX]]],
is_2d : s1.is_2d && s2.is_2d,
is_3d : s1.is_3d && s2.is_3d,
};
in {
call : _intersection3 false,
cmix : _intersection3 true,
};
difference2 =
let
_difference2 [s1,s2] = intersection2 [s1, complement s2];
_difference2_col [s1,s2] = intersection2.cmix [s1, complement s2];
in {
call : _difference2,
cmix : _difference2_col,
};
in
difference2.cmix [
pumpkin {d:dia, height:height, centre_height:centre_height, rib_width:rib_width, rib_num:rib_num},
face,
]
>> rotate (10*deg) >> rotate.x (10*deg)
>> lib.utilities.face_camera
//>> show_axes
| 16:44:00 |
| 3dlirious | 
Download screenshot.1728146340.jpg | 16:44:31 |
| 3dlirious | Still a work in progress, but figure I better go ahead and share, since it won't be October for long. | 16:59:24 |
| 3dlirious | 
Download screenshot.1728157440.jpg | 19:57:54 |
| 3dlirious | Seven pumpkins, fresh from the parametric patch:
row 2 [
difference2.cmix [
pumpkin {d:12, height:10, centre_height:0.6, rib_width:4, rib_num:16},
face,
] >> align.min.z,
pumpkin {d:13, height:19, centre_height:0.8, rib_width:4.2, rib_num:17} >> align.min.z,
pumpkin {d:16, height:7, centre_height:0.6, rib_width:4, rib_num:18} >> align.min.z,
pumpkin {d:14, height:10, centre_height:0.6, rib_width:4, rib_num:15} >> align.min.z,
pumpkin {d:15, height:15, centre_height:0.8, rib_width:3.5, rib_num:16} >> align.min.z,
pumpkin {d:11, height:8, centre_height:0.6, rib_width:3.5, rib_num:12} >> align.min.z,
pumpkin {d:13, height:9, centre_height:0.5, rib_width:4.2, rib_num:15} >> align.min.z,
]
| 19:58:02 |
| 6 Oct 2024 |
| 3dlirious | 
Download screenshot.1728218694.jpg | 12:47:20 |
| 3dlirious | Today's varietal is intersected with the F surface, lib.tpms.tpms_f. It reminds me of Yayoi Kusama's dotted pumpkins, and so I coloured it gold in homage. | 12:47:45 |
 krzno | In reply to @3dlirious:matrix.org
Seven pumpkins, fresh from the parametric patch:
row 2 [
difference2.cmix [
pumpkin {d:12, height:10, centre_height:0.6, rib_width:4, rib_num:16},
face,
] >> align.min.z,
pumpkin {d:13, height:19, centre_height:0.8, rib_width:4.2, rib_num:17} >> align.min.z,
pumpkin {d:16, height:7, centre_height:0.6, rib_width:4, rib_num:18} >> align.min.z,
pumpkin {d:14, height:10, centre_height:0.6, rib_width:4, rib_num:15} >> align.min.z,
pumpkin {d:15, height:15, centre_height:0.8, rib_width:3.5, rib_num:16} >> align.min.z,
pumpkin {d:11, height:8, centre_height:0.6, rib_width:3.5, rib_num:12} >> align.min.z,
pumpkin {d:13, height:9, centre_height:0.5, rib_width:4.2, rib_num:15} >> align.min.z,
]
Yummy, thank | 18:23:40 |
| 15 Oct 2024 |
|  @pedocepe:matrix.org left the room. | 08:35:04 |
