From 85fec74abc5bf333e73a109e676a6424e7df34b6 Mon Sep 17 00:00:00 2001 From: Adrian Mariano Date: Wed, 17 Jan 2024 19:55:59 -0500 Subject: [PATCH] add remark on triangulation of vnfs --- skin.scad | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/skin.scad b/skin.scad index 636c677d..edf5d91f 100644 --- a/skin.scad +++ b/skin.scad @@ -2876,6 +2876,16 @@ function associate_vertices(polygons, split, curpoly=0) = // cyl(d=10/PI, h=5, chamfer=0, // texture=texture("bricks_vnf"), tex_samples=8, tex_reps=[6,3], tex_depth=.2); // } +// Continues: +// Note that when the VNF is sliced, +// extra points can be introduced in the interior of faces leading to unexpected irregularities in the textures, which appear +// as extra triangles. These artifacts can be minimized by making the VNF texture's faces as large as possible rather than using +// a triangulated VNF, but depending on the specific VNF texture, it may be impossible to entirely eliminate them. +// Figure(3D,Big,NoAxes,VPR=[140.9,0,345.7],VPT=[9.48289,-0.88709,5.7837],VPD=39.5401): The left shows a normal bricks_vnf texture. The right shows a texture that was first passed through {{vnf_triangulate()}}. Note the extra triangle artifacts visible across the brick faces. +// tex = texture("bricks_vnf"); +// cyl(d=10,h=15,texture=tex, tex_reps=[4,2],tex_samples=5); +// up(7)fwd(-3)right(15)cyl(d=10,h=15,texture=vnf_triangulate(tex), tex_reps=[4,2],tex_samples=5); + // Function: texture() // Topics: Textures, Knurling