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Improved rendering of cubic beziers.

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Revar Desmera 2019-02-03 00:13:21 -08:00
parent 67dbb575c6
commit 4762d72090
1 changed files with 7 additions and 15 deletions
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22
debug.scad
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@ -32,6 +32,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
include <transforms.scad> include <transforms.scad>
include <math.scad> include <math.scad>
include <paths.scad>
include <beziers.scad> include <beziers.scad>
@ -47,7 +48,7 @@ include <beziers.scad>
// [-10, 0, 0], [-15, -5, 9], [0, -3, 5], [5, -10, 0], // [-10, 0, 0], [-15, -5, 9], [0, -3, 5], [5, -10, 0],
// [15, 0, -5], [5, 12, -8], [0, 10, -5] // [15, 0, -5], [5, 12, -8], [0, 10, -5]
// ]; // ];
// trace_polyline(bez, N=1, showpts=true, size=0.5, color="lightgreen"); // trace_polyline(bez, N=3, showpts=true, size=0.5, color="lightgreen");
module trace_polyline(pline, N=1, showpts=false, size=1, color="yellow") { module trace_polyline(pline, N=1, showpts=false, size=1, color="yellow") {
if (showpts) { if (showpts) {
for (i = [0:len(pline)-1]) { for (i = [0:len(pline)-1]) {
@ -65,17 +66,8 @@ module trace_polyline(pline, N=1, showpts=false, size=1, color="yellow") {
} }
} }
for (i = [0:len(pline)-2]) { for (i = [0:len(pline)-2]) {
delta = pline[i+1] - pline[i]; if (N!=3 || (i%N) != 1) {
dist2d = norm([delta[0], delta[1], 0]); color(color) extrude_from_to(pline[i], pline[i+1]) circle(d=size/2);
dist3d = norm(delta);
theta = atan2(delta[1], delta[0]);
phi = atan2(delta[2], dist2d);
translate(pline[i]) {
rotate([0, -phi, theta]) {
yrot(90) {
color(color) cylinder(d=size, h=dist3d, center=false, $fn=4);
}
}
} }
} }
} }
@ -220,9 +212,9 @@ module debug_faces(vertices, faces, size=1, disabled=false) {
// txtsize = The size of the text used to label the faces and vertices. // txtsize = The size of the text used to label the faces and vertices.
// disabled = If true, act exactly like `polyhedron()`. Default = false. // disabled = If true, act exactly like `polyhedron()`. Default = false.
// Example: // Example:
pts = [[-5,0,-5], [5,0,-5], [0,-5,5], [0,5,5]]; // pts = [[-5,0,-5], [5,0,-5], [0,-5,5], [0,5,5]];
fcs = [[0,2,1], [1,2,3], [1,3,0], [0,2,3]]; // Last face reversed // fcs = [[0,2,1], [1,2,3], [1,3,0], [0,2,3]]; // Last face reversed
debug_polyhedron(points=pts, faces=fcs, txtsize=1); // debug_polyhedron(points=pts, faces=fcs, txtsize=1);
module debug_polyhedron(points, faces, convexity=10, txtsize=1, disabled=false) { module debug_polyhedron(points, faces, convexity=10, txtsize=1, disabled=false) {
debug_faces(vertices=points, faces=faces, size=txtsize, disabled=disabled) { debug_faces(vertices=points, faces=faces, size=txtsize, disabled=disabled) {
polyhedron(points=points, faces=faces, convexity=convexity); polyhedron(points=points, faces=faces, convexity=convexity);