3DPrinting/PrusaSlicer-NonPlainar
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Eradicated admesh from TriangleMesh:

Browse source 
TriangleMesh newly only holds indexed_triangle_set and
TriangleMeshStats. TriangleMeshStats contains an excerpt of stl_stats.
TriangleMeshStats are updated when initializing with indexed_triangle_set.

Admesh triangle mesh fixing is newly only used when loading an STL.
AMF / 3MF / OBJ file formats are already indexed triangle sets, thus
they are no more converted to admesh stl_file format, nor fixed
through admesh repair machinery. When importing AMF / 3MF / OBJ files,
volume is calculated and if negative, all faces are flipped. Also
a bounding box and number of open edges is calculated.

Implemented its_number_of_patches(), its_num_open_edges()
Optimized its_split(), its_is_splittable() using a visitor pattern.

Reworked QHull integration into TriangleMesh:
    1) Face normals were not right.
    2) Indexed triangle set is newly emitted instead of duplicating
       vertices for each face.

Fixed cut_mesh(): Orient the triangulated faces correctly.
This commit is contained in:
Vojtech Bubnik 2021-09-20 17:12:22 +02:00
parent f484953a5a
commit 8a2a9dba2f
59 changed files with 1056 additions and 1758 deletions
Download patch file Download diff file Expand all files Collapse all files

68
src/admesh/connect.cpp
View file

@ -239,6 +239,7 @@ private:
return edge_a.facet_number != edge_b.facet_number && edge_a == edge_b;
}
// Connect edge_a with edge_b, update edge connection statistics.
static void record_neighbors(stl_file *stl, const HashEdge &edge_a, const HashEdge &edge_b)
{
// Facet a's neighbor is facet b
@ -249,7 +250,7 @@ private:
stl->neighbors_start[edge_b.facet_number].neighbor[edge_b.which_edge % 3] = edge_a.facet_number; /* sets the .neighbor part */
stl->neighbors_start[edge_b.facet_number].which_vertex_not[edge_b.which_edge % 3] = (edge_a.which_edge + 2) % 3; /* sets the .which_vertex_not part */
if (((edge_a.which_edge < 3) && (edge_b.which_edge < 3)) || ((edge_a.which_edge > 2) && (edge_b.which_edge > 2))) {
if ((edge_a.which_edge < 3 && edge_b.which_edge < 3) || (edge_a.which_edge > 2 && edge_b.which_edge > 2)) {
// These facets are oriented in opposite directions, their normals are probably messed up.
stl->neighbors_start[edge_a.facet_number].which_vertex_not[edge_a.which_edge % 3] += 3;
stl->neighbors_start[edge_b.facet_number].which_vertex_not[edge_b.which_edge % 3] += 3;
@ -479,12 +480,13 @@ void stl_check_facets_exact(stl_file *stl)
void stl_check_facets_nearby(stl_file *stl, float tolerance)
{
if ( (stl->stats.connected_facets_1_edge == stl->stats.number_of_facets)
&& (stl->stats.connected_facets_2_edge == stl->stats.number_of_facets)
&& (stl->stats.connected_facets_3_edge == stl->stats.number_of_facets)) {
assert(stl->stats.connected_facets_3_edge <= stl->stats.connected_facets_2_edge);
assert(stl->stats.connected_facets_2_edge <= stl->stats.connected_facets_1_edge);
assert(stl->stats.connected_facets_1_edge <= stl->stats.number_of_facets);
if (stl->stats.connected_facets_3_edge == stl->stats.number_of_facets)
// No need to check any further. All facets are connected.
return;
}
HashTableEdges hash_table(stl->stats.number_of_facets);
for (uint32_t i = 0; i < stl->stats.number_of_facets; ++ i) {
@ -514,22 +516,12 @@ void stl_remove_unconnected_facets(stl_file *stl)
/* Update list of connected edges */
stl_neighbors &neighbors = stl->neighbors_start[facet_number];
// Update statistics on unconnected triangle edges.
switch ((neighbors.neighbor[0] == -1) + (neighbors.neighbor[1] == -1) + (neighbors.neighbor[2] == -1)) {
case 0: // Facet has 3 neighbors
-- stl->stats.connected_facets_3_edge;
-- stl->stats.connected_facets_2_edge;
-- stl->stats.connected_facets_1_edge;
break;
case 1: // Facet has 2 neighbors
-- stl->stats.connected_facets_2_edge;
-- stl->stats.connected_facets_1_edge;
break;
case 2: // Facet has 1 neighbor
-- stl->stats.connected_facets_1_edge;
case 3: // Facet has 0 neighbors
break;
default:
assert(false);
switch (neighbors.num_neighbors()) {
case 3: -- stl->stats.connected_facets_3_edge; // fall through
case 2: -- stl->stats.connected_facets_2_edge; // fall through
case 1: -- stl->stats.connected_facets_1_edge; // fall through
case 0: break;
default: assert(false);
}
if (facet_number < int(-- stl->stats.number_of_facets)) {
@ -555,20 +547,14 @@ void stl_remove_unconnected_facets(stl_file *stl)
auto remove_degenerate = [stl, remove_facet](int facet)
{
// Update statistics on face connectivity.
auto stl_update_connects_remove_1 = [stl](int facet_num) {
//FIXME when decreasing 3_edge, should I increase 2_edge etc?
switch ((stl->neighbors_start[facet_num].neighbor[0] == -1) + (stl->neighbors_start[facet_num].neighbor[1] == -1) + (stl->neighbors_start[facet_num].neighbor[2] == -1)) {
case 0: // Facet has 3 neighbors
-- stl->stats.connected_facets_3_edge; break;
case 1: // Facet has 2 neighbors
-- stl->stats.connected_facets_2_edge; break;
case 2: // Facet has 1 neighbor
-- stl->stats.connected_facets_1_edge; break;
case 3: // Facet has 0 neighbors
break;
default:
assert(false);
// Update statistics on face connectivity after one edge was disconnected on the facet "facet_num".
auto update_connects_remove_1 = [stl](int facet_num) {
switch (stl->neighbors_start[facet_num].num_neighbors()) {
case 0: assert(false); break;
case 1: -- stl->stats.connected_facets_1_edge; break;
case 2: -- stl->stats.connected_facets_2_edge; break;
case 3: -- stl->stats.connected_facets_3_edge; break;
default: assert(false);
}
};
@ -604,9 +590,9 @@ void stl_remove_unconnected_facets(stl_file *stl)
// Update statistics on edge connectivity.
if ((neighbor[0] == -1) && (neighbor[1] != -1))
stl_update_connects_remove_1(neighbor[1]);
update_connects_remove_1(neighbor[1]);
if ((neighbor[1] == -1) && (neighbor[0] != -1))
stl_update_connects_remove_1(neighbor[0]);
update_connects_remove_1(neighbor[0]);
if (neighbor[0] >= 0) {
if (neighbor[1] >= 0) {
@ -634,7 +620,7 @@ void stl_remove_unconnected_facets(stl_file *stl)
stl->neighbors_start[neighbor[1]].which_vertex_not[(vnot[1] + 1) % 3] = vnot[0];
}
if (neighbor[2] >= 0) {
stl_update_connects_remove_1(neighbor[2]);
update_connects_remove_1(neighbor[2]);
stl->neighbors_start[neighbor[2]].neighbor[(vnot[2] + 1) % 3] = -1;
}
@ -652,11 +638,9 @@ void stl_remove_unconnected_facets(stl_file *stl)
++ i;
if (stl->stats.connected_facets_1_edge < (int)stl->stats.number_of_facets) {
// remove completely unconnected facets
// There are some faces with no connected edge at all. Remove completely unconnected facets.
for (uint32_t i = 0; i < stl->stats.number_of_facets;)
if (stl->neighbors_start[i].neighbor[0] == -1 &&
stl->neighbors_start[i].neighbor[1] == -1 &&
stl->neighbors_start[i].neighbor[2] == -1) {
if (stl->neighbors_start[i].num_neighbors() == 0) {
// This facet is completely unconnected. Remove it.
remove_facet(i);
assert(stl_validate(stl));