From 0558b53493a77bae44831cf87bb0f59359828ef5 Mon Sep 17 00:00:00 2001 From: bubnikv Date: Wed, 19 Sep 2018 11:02:24 +0200 Subject: WIP: Moved sources int src/, separated most of the source code from Perl. The XS was left only for the unit / integration tests, and it links libslic3r only. No wxWidgets are allowed to be used from Perl starting from now. --- src/qhull/html/qh-optp.htm | 253 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 253 insertions(+) create mode 100644 src/qhull/html/qh-optp.htm (limited to 'src/qhull/html/qh-optp.htm') diff --git a/src/qhull/html/qh-optp.htm b/src/qhull/html/qh-optp.htm new file mode 100644 index 000000000..9c6df90f5 --- /dev/null +++ b/src/qhull/html/qh-optp.htm @@ -0,0 +1,253 @@ + + + + +Qhull print options (P) + + + + +

Up: Home page for Qhull
+Up: Qhull manual: Table of Contents
+To: Programs +• Options +• Output +• Formats +• Geomview +• Print +• Qhull +• Precision +• Trace +• Functions

+ +

Qhull print options (P)

+ +This section lists the print options for Qhull. These options are +indicated by 'P' followed by a letter. See +Output, Geomview, +and Format for other output options. + + +

+ +

» Programs +• Options +• Output +• Formats +• Geomview +• Print +• Qhull +• Precision +• Trace +• Functions

+ +

Print options

+
+

+
General
+
Pp
+
do not report precision problems
+
Po
+
force output despite precision problems
+
Po
+
if error, output neighborhood of facet
+

+

+
Select
+
Pdk:n
+
print facets with normal[k] >= n (default 0.0)
+
PDk:n
+
print facets with normal[k] <= n
+
PFn
+
print facets whose area is at least n
+
Pg
+
print good facets only (needs 'QGn' + or 'QVn ')
+
PMn
+
print n facets with most merges
+
PAn
+
print n largest facets by area
+
PG
+
print neighbors of good facets
+
+

+ +

»PAn - keep n largest +facets by area

+ +

The n largest facets are marked good for printing. This +may be useful for approximating +a hull. Unless 'PG' is set, 'Pg' +is automatically set.

+ +

»Pdk:n - print facet if +normal[k] >= n

+ +

For a given output, print only those facets with normal[k] >= n +and drop the others. For example, 'Pd0:0.5' prints facets with normal[0] +>= 0.5 . The default value of n is zero. For +example in 3-d, 'Pd0d1d2' prints facets in the positive octant. +

+If no facets match, the closest facet is returned.

+On Windows 95, do not combine multiple options. A 'd' is considered +part of a number. For example, use 'Pd0:0.5 Pd1:0.5' instead of +'Pd0:0.5d1:0.5'. + +

»PDk:n - print facet if +normal[k] <= n

+ +

For a given output, print only those facets with normal[k] <= n +and drop the others. +For example, 'PD0:0.5' prints facets with normal[0] +<= 0.5 . The default value of n is zero. For +example in 3-d, 'PD0D1D2' displays facets in the negative octant. +

+If no facets match, the closest facet is returned.

+ +

In 2-d, 'd G PD2' displays the Delaunay triangulation instead +of the corresponding paraboloid.

+ +

Be careful of placing 'Dk' or 'dk' immediately after a real +number. Some compilers treat the 'D' as a double precision +exponent.

+ +

»PFn - keep facets whose +area is at least n

+ +

The facets with area at least n are marked good for +printing. This may be useful for approximating a hull. Unless +'PG' is set, 'Pg' is +automatically set.

+ +

»Pg - print good facets

+ +

Qhull can mark facets as "good". This is used to

+ +

mark the lower convex hull for Delaunay triangulations + and Voronoi diagrams
mark the facets that are visible from a point (the 'QGn ' option)
mark the facets that contain a point (the 'QVn' option).
indicate facets with a large enough area (options 'PAn' and 'PFn')

+ +

Option 'Pg' only prints good facets that +also meet 'Pdk' and 'PDk' +options. It is automatically set for options 'PAn', +'PFn ', 'QGn', +and 'QVn'.

+ +

»PG - print neighbors of +good facets

+ +

Option 'PG' can be used with or without option 'Pg' +to print the neighbors of good facets. For example, options 'QGn' and 'QVn' +print the horizon facets for point n.

+ +

»PMn - keep n facets with +most merges

+ +

The n facets with the most merges are marked good for +printing. This may be useful for approximating a hull. Unless +'PG' is set, 'Pg' is +automatically set.

+ +

Use option 'Fm' to print merges +per facet. + +

»Po - force output despite +precision problems

+ +

Use options 'Po' and 'Q0' if you +can not merge facets, triangulate the output ('Qt'), +or joggle the input (QJ). + +

Option 'Po' can not force output when +duplicate ridges or duplicate facets occur. It may produce +erroneous results. For these reasons, merged facets, joggled input, or exact arithmetic are better.

+ +

If you need a simplicial Delaunay triangulation, use +joggled input 'QJ' or triangulated +output 'Ft'. + +

Option 'Po' may be used without 'Q0' +to remove some steps from Qhull or to output the neighborhood of +an error.

+ +

Option 'Po' may be used with option 'Q5') +to skip qh_check_maxout (i.e., do not determine the maximum outside distance). +This can save a significant amount of time. + +

If option 'Po' is used,

+ +

most precision errors allow Qhull to continue.
verify ('Tv') does not check + coplanar points.
points are not partitioned into flipped facets and a + flipped facet is always visible to a point. This may + delete flipped facets from the output.

+ +

»Po - if error, output +neighborhood of facet

+ +

If an error occurs before the completion of Qhull and tracing +is not active, 'Po' outputs a neighborhood of the erroneous +facets (if any). It uses the current output options.

+ +

See 'Po' - force output despite +precision problems. + +

»Pp - do not report +precision problems

+ +

With option 'Pp', Qhull does not print statistics about +precision problems, and it removes some of the warnings. It +removes the narrow hull warning.

+ + +

+ +

The Geometry Center +Home Page

+ +

Comments to: qhull@qhull.org +
+Created: Sept. 25, 1995 --- Last modified: see top

+ + -- cgit v1.2.3