From 32e323c64ca7e81d8eff0fd3da5198a01b484539 Mon Sep 17 00:00:00 2001 From: tamasmeszaros Date: Wed, 4 Jan 2023 12:59:05 +0100 Subject: [PATCH] Fix supports below ground --- src/libslic3r/SLA/SupportTreeUtils.hpp | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/src/libslic3r/SLA/SupportTreeUtils.hpp b/src/libslic3r/SLA/SupportTreeUtils.hpp index 8f27ab914..a7220ce0e 100644 --- a/src/libslic3r/SLA/SupportTreeUtils.hpp +++ b/src/libslic3r/SLA/SupportTreeUtils.hpp @@ -517,6 +517,11 @@ Vec3d check_ground_route( const auto sd = sm.cfg.safety_distance(source.r); const auto gndlvl = ground_level(sm); + // Intersection of the suggested bridge with ground plane. If the bridge + // spans below ground, stop it at ground level. + double t = (gndlvl - source.pos.z()) / dir.z(); + bridge_len = std::min(t, bridge_len); + Vec3d bridge_end = source.pos + bridge_len * dir; double down_l = bridge_end.z() - gndlvl; @@ -648,6 +653,9 @@ GroundConnection deepsearch_ground_connection( Vec3d n = spheric_to_dir(plr, azm); assert(std::abs(n.norm() - 1.) < EPSILON); + double t = (gndlvl - source.pos.z()) / n.z(); + bridge_l = std::min(t, bridge_l); + // Now the optimizer gave a possible route to ground with a bridge direction // and length. This length can be shortened further by brute-force queries // of free route straigt down for a possible pillar. @@ -655,7 +663,7 @@ GroundConnection deepsearch_ground_connection( // constraint, but it would not find quickly enough an accurate solution, // and it would be very hard to define a stop score which is very useful in // terminating the search as soon as the ground is found. - double l = 0., l_max = sm.cfg.max_bridge_length_mm; + double l = 0., l_max = bridge_l; double zlvl = std::numeric_limits::infinity(); while(zlvl > gndlvl && l <= l_max) {