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add sf_splines

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Justin Lin
2021-06-02 17:26:21 +08:00
parent 3e51eb9afe
commit 2c02c0ff59
1 changed files with 90 additions and 0 deletions
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90
src/surface/sf_splines.scad Normal file
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function sf_splines(ctrl_pts, rspline, cspline) =
let(
leng_ctrl_pts = len(ctrl_pts),
cspl = is_undef(cspline) ? rspline : cspline,
r_pts = [
for(r = 0; r < leng_ctrl_pts; r = r + 1)
rspline(ctrl_pts[r])
],
leng_r_pts0 = len(r_pts[0]),
leng_r_pts = len(r_pts)
)
[
for(c = 0; c < leng_r_pts0; c = c + 1)
cspl([for(r = 0; r < leng_r_pts; r = r + 1) r_pts[r][c]])
];
/*
use <bspline_curve.scad>;
use <function_grapher.scad>;
use <surface/sf_splines.scad>;
ctrl_pts = [
[[0, 0, 20], [60, 0, -35], [90, 0, 60], [200, 0, 5]],
[[0, 50, 30], [100, 60, -25], [120, 50, 120], [200, 50, 5]],
[[0, 100, 0], [60, 120, 35], [90, 100, 60], [200, 100, 45]],
[[0, 150, 0], [60, 150, -35], [90, 180, 60], [200, 150, 45]]
];
thickness = 2;
t_step = 0.05;
degrees = 2;
rspline = function(points) bspline_curve(t_step, degrees, points);
cspline = function(points) bspline_curve(t_step, degrees, points);
function_grapher(sf_splines(ctrl_pts, rspline, cspline), thickness);
*/
/*
use <bezier_curve.scad>;
use <function_grapher.scad>;
use <surface/sf_splines.scad>;
ctrl_pts = [
[[0, 0, 20], [60, 0, -35], [90, 0, 60], [200, 0, 5]],
[[0, 50, 30], [100, 60, -25], [120, 50, 120], [200, 50, 5]],
[[0, 100, 0], [60, 120, 35], [90, 100, 60], [200, 100, 45]],
[[0, 150, 0], [60, 150, -35], [90, 180, 60], [200, 150, 45]]
];
thickness = 2;
t_step = 0.05;
rspline = function(points) bezier_curve(t_step, points);
cspline = function(points) bezier_curve(t_step, points);
function_grapher(sf_splines(ctrl_pts, rspline, cspline), thickness);
*/
/*
use <curve.scad>;
use <function_grapher.scad>;
use <surface/sf_splines.scad>;
use <hull_polyline3d.scad>;
ctrl_pts = [
[[0, 0, 20], [20, 0, -15], [90, 0, 30], [200, 0, 5]],
[[0, 20, 30], [30, 30, -25], [80, 40, 20], [100, 50, 5]],
[[0, 100, 0], [20, 90, 15], [90, 100, 10], [100, 100, 45]],
[[0, 110, 0], [40, 120, -35], [90, 130, 20], [120, 120, 15]]
];
thickness = 2;
t_step = 0.05;
rspline = function(points) curve(t_step, points);
cspline = function(points) curve(t_step, points);
function_grapher(sf_splines(ctrl_pts, rspline, cspline), thickness);
for(i = [0:3]) {
%hull_polyline3d(ctrl_pts[i]);
#hull_polyline3d(curve(t_step, ctrl_pts[i]));
}
*/