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add surface_grapher

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Justin Lin
2020-02-18 11:13:11 +08:00
parent 7e0400ea91
commit 018b2e8be2
1 changed files with 159 additions and 0 deletions
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src/experimental/surface_grapher.scad Normal file
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/**
* surface_grapher.scad
*
* @copyright Justin Lin, 2020
* @license https://opensource.org/licenses/lgpl-3.0.html
*
* @see https://openhome.cc/eGossip/OpenSCAD/lib2x-surface_grapher.html
*
**/
use <util/reverse.scad>;
use <experimental/flat.scad>;
module surface_grapher(surface1, surface2, slicing = "SLASH") {
rows = len(surface1);
columns = len(surface1[0]);
yi_range = [0:rows - 2];
xi_range = [0:columns - 2];
module faces() {
function xy_to_index(x, y, columns) = y * columns + x;
flatted_sf1 = flat(surface1);
flatted_sf2 = flat(surface2);
leng_pts = len(flatted_sf1);
sf1_tri_faces1 = slicing == "SLASH" ? [
for(yi = yi_range)
for(xi = xi_range)
[
xy_to_index(xi, yi, columns),
xy_to_index(xi + 1, yi + 1, columns),
xy_to_index(xi + 1, yi, columns)
]
] : [
for(yi = yi_range)
for(xi = xi_range)
[
xy_to_index(xi, yi, columns),
xy_to_index(xi, yi + 1, columns),
xy_to_index(xi + 1, yi, columns)
]
];
sf1_tri_faces2 = slicing == "SLASH" ? [
for(yi = yi_range)
for(xi = xi_range)
[
xy_to_index(xi, yi, columns),
xy_to_index(xi, yi + 1, columns),
xy_to_index(xi + 1, yi + 1, columns)
]
] : [
for(yi = yi_range)
for(xi = xi_range)
[
xy_to_index(xi, yi + 1, columns),
xy_to_index(xi + 1, yi + 1, columns),
xy_to_index(xi + 1, yi, columns)
]
];
offset_v = [leng_pts, leng_pts, leng_pts];
sf2_tri_faces1 = [
for(face = sf1_tri_faces1)
reverse(face) + offset_v
];
sf2_tri_faces2 = [
for(face = sf1_tri_faces2)
reverse(face) + offset_v
];
side_faces1 = [
for(xi = xi_range)
let(
idx1 = xy_to_index(xi, 0, columns),
idx2 = xy_to_index(xi + 1, 0, columns)
)
[
idx1,
idx2,
idx2 + leng_pts,
idx1 + leng_pts
]
];
side_faces2 = [
for(yi = yi_range)
let(
xi = columns - 1,
idx1 = xy_to_index(xi, yi, columns),
idx2 = xy_to_index(xi, yi + 1, columns)
)
[
idx1,
idx2,
idx2 + leng_pts,
idx1 + leng_pts
]
];
side_faces3 = [
for(xi = xi_range)
let(
yi = rows - 1,
idx1 = xy_to_index(xi, yi, columns),
idx2 = xy_to_index(xi + 1, yi, columns)
)
[
idx2,
idx1,
idx1 + leng_pts,
idx2 + leng_pts
]
];
side_faces4 = [
for(yi = yi_range)
let(
idx1 = xy_to_index(0, yi, columns),
idx2 = xy_to_index(0, yi + 1, columns)
)
[
idx2,
idx1,
idx1 + leng_pts,
idx2 + leng_pts
]
];
pts = concat(flatted_sf1, flatted_sf2);
face_idxs = concat(
sf1_tri_faces1, sf1_tri_faces2,
sf2_tri_faces1, sf2_tri_faces2,
side_faces1,
side_faces2,
side_faces3,
side_faces4
);
polyhedron(
points = pts,
faces = face_idxs
);
// hook for testing
test_surface_grapher_faces(pts, face_idxs);
}
faces();
}
// override it to test
module test_surface_grapher_faces(surface1, faces) {
}