forked from bartvdbraak/blender
Add convex hull operator (bmesh operator and wm operator.)
Image-heavy user documentation: http://wiki.blender.org/index.php/User:Nicholasbishop/Convex_Hull Thanks to Campbell for providing code review: http://codereview.appspot.com/6114060
This commit is contained in:
parent
650edc90b1
commit
70f1279eab
@ -41,6 +41,7 @@ set(SRC
|
||||
operators/bmo_dupe.c
|
||||
operators/bmo_edgesplit.c
|
||||
operators/bmo_extrude.c
|
||||
operators/bmo_hull.c
|
||||
operators/bmo_inset.c
|
||||
operators/bmo_join_triangles.c
|
||||
operators/bmo_mesh_conv.c
|
||||
|
@ -69,6 +69,7 @@ void BMO_error_clear(BMesh *bm);
|
||||
#define BMERR_NONMANIFOLD 8
|
||||
#define BMERR_INVALID_SELECTION 9
|
||||
#define BMERR_MESH_ERROR 10
|
||||
#define BMERR_CONVEX_HULL_FAILED 11
|
||||
|
||||
/* BMESH_ASSERT */
|
||||
#ifdef WITH_ASSERT_ABORT
|
||||
|
@ -1144,6 +1144,35 @@ static BMOpDefine bmo_vertex_slide_def = {
|
||||
BMO_OP_FLAG_UNTAN_MULTIRES
|
||||
};
|
||||
|
||||
/*
|
||||
* Convex Hull
|
||||
*
|
||||
* Builds a convex hull from the vertices in 'input'.
|
||||
*
|
||||
* If 'use_existing_faces' is true, the hull will not output triangles
|
||||
* that are covered by a pre-existing face.
|
||||
*
|
||||
* All hull vertices, faces, and edges are added to 'geomout'. Any
|
||||
* input elements that end up inside the hull (i.e. are not used by an
|
||||
* output face) are added to the 'interior_geom' slot. The
|
||||
* 'unused_geom' slot will contain all interior geometry that is
|
||||
* completely unused. Lastly, 'holes_geom' contains edges and faces
|
||||
* that were in the input and are part of the hull.
|
||||
*/
|
||||
static BMOpDefine bmo_convex_hull_def = {
|
||||
"convex_hull",
|
||||
{{BMO_OP_SLOT_ELEMENT_BUF, "input"},
|
||||
{BMO_OP_SLOT_BOOL, "use_existing_faces"},
|
||||
|
||||
/* Outputs */
|
||||
{BMO_OP_SLOT_ELEMENT_BUF, "geomout"},
|
||||
{BMO_OP_SLOT_ELEMENT_BUF, "interior_geom"},
|
||||
{BMO_OP_SLOT_ELEMENT_BUF, "unused_geom"},
|
||||
{BMO_OP_SLOT_ELEMENT_BUF, "holes_geom"},
|
||||
{0} /* null-terminating sentinel */},
|
||||
bmo_convex_hull_exec,
|
||||
0
|
||||
};
|
||||
|
||||
BMOpDefine *opdefines[] = {
|
||||
&bmo_split_def,
|
||||
@ -1214,6 +1243,7 @@ BMOpDefine *opdefines[] = {
|
||||
&bmo_inset_def,
|
||||
&bmo_wireframe_def,
|
||||
&bmo_vertex_slide_def,
|
||||
&bmo_convex_hull_def,
|
||||
};
|
||||
|
||||
int bmesh_total_ops = (sizeof(opdefines) / sizeof(void *));
|
||||
|
@ -101,5 +101,6 @@ void bmo_bridge_loops_exec(BMesh *bm, BMOperator *op);
|
||||
void bmo_solidify_face_region_exec(BMesh *bm, BMOperator *op);
|
||||
void bmo_inset_exec(BMesh *bm, BMOperator *op);
|
||||
void bmo_wireframe_exec(BMesh *bm, BMOperator *op);
|
||||
void bmo_convex_hull_exec(BMesh *bm, BMOperator *op);
|
||||
|
||||
#endif /* __BMESH_OPERATORS_PRIVATE_H__ */
|
||||
|
742
source/blender/bmesh/operators/bmo_hull.c
Normal file
742
source/blender/bmesh/operators/bmo_hull.c
Normal file
@ -0,0 +1,742 @@
|
||||
/*
|
||||
* ***** BEGIN GPL LICENSE BLOCK *****
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* of the License, or (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software Foundation,
|
||||
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||||
*
|
||||
* Contributor(s): Nicholas Bishop
|
||||
*
|
||||
* ***** END GPL LICENSE BLOCK *****
|
||||
*/
|
||||
|
||||
/** \file blender/bmesh/operators/bmo_hull.c
|
||||
* \ingroup bmesh
|
||||
*/
|
||||
|
||||
#include "MEM_guardedalloc.h"
|
||||
|
||||
#include "BLI_ghash.h"
|
||||
#include "BLI_listbase.h"
|
||||
#include "BLI_math.h"
|
||||
#include "BLI_utildefines.h"
|
||||
|
||||
/* XXX: using 128 for totelem and pchunk of mempool, no idea what good
|
||||
values would be though */
|
||||
#include "BLI_mempool.h"
|
||||
|
||||
#include "bmesh.h"
|
||||
|
||||
/* Internal operator flags */
|
||||
typedef enum {
|
||||
HULL_FLAG_INPUT = (1 << 0),
|
||||
HULL_FLAG_TETRA_VERT = (1 << 1),
|
||||
|
||||
HULL_FLAG_INTERIOR_ELE = (1 << 2),
|
||||
HULL_FLAG_OUTPUT_GEOM = (1 << 3),
|
||||
|
||||
HULL_FLAG_DEL = (1 << 4),
|
||||
HULL_FLAG_HOLE = (1 << 5)
|
||||
} HullFlags;
|
||||
|
||||
/* Store hull triangles seperate from BMesh faces until the end; this
|
||||
way we don't have to worry about cleaning up extraneous edges or
|
||||
incorrectly deleting existing geometry. */
|
||||
typedef struct HullTriangle {
|
||||
BMVert *v[3];
|
||||
float no[3];
|
||||
int skip;
|
||||
} HullTriangle;
|
||||
|
||||
/* These edges define the hole created in the hull by deleting faces
|
||||
that can "see" a new vertex (the boundary edges then form the edge
|
||||
of a new triangle fan that has the new vertex as its center) */
|
||||
typedef struct HullBoundaryEdge {
|
||||
struct HullBoundaryEdge *next, *prev;
|
||||
BMVert *v[2];
|
||||
} HullBoundaryEdge;
|
||||
|
||||
|
||||
|
||||
/*************************** Boundary Edges ***************************/
|
||||
|
||||
static int edge_match(BMVert *e1_0, BMVert *e1_1, BMVert *e2[2])
|
||||
{
|
||||
return (e1_0 == e2[0] && e1_1 == e2[1]) ||
|
||||
(e1_0 == e2[1] && e1_1 == e2[0]);
|
||||
}
|
||||
|
||||
/* Returns true if the edge (e1, e2) is already in edges; that edge is
|
||||
deleted here as well. if not found just returns 0 */
|
||||
static int check_for_dup(ListBase *edges, BLI_mempool *pool,
|
||||
BMVert *e1, BMVert *e2)
|
||||
{
|
||||
HullBoundaryEdge *e, *next;
|
||||
|
||||
for (e = edges->first; e; e = next) {
|
||||
next = e->next;
|
||||
|
||||
if (edge_match(e1, e2, e->v)) {
|
||||
/* remove the interior edge */
|
||||
BLI_remlink(edges, e);
|
||||
BLI_mempool_free(pool, e);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void expand_boundary_edges(ListBase *edges, BLI_mempool *edge_pool,
|
||||
const HullTriangle *t)
|
||||
{
|
||||
HullBoundaryEdge *new;
|
||||
int i;
|
||||
|
||||
/* Insert each triangle edge into the boundary list; if any of
|
||||
its edges are already in there, remove the edge entirely */
|
||||
for (i = 0; i < 3; i++) {
|
||||
if (!check_for_dup(edges, edge_pool, t->v[i], t->v[(i + 1) % 3])) {
|
||||
new = BLI_mempool_calloc(edge_pool);
|
||||
new->v[0] = t->v[i];
|
||||
new->v[1] = t->v[(i + 1) % 3];
|
||||
BLI_addtail(edges, new);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*************************** Hull Triangles ***************************/
|
||||
|
||||
static void hull_add_triangle(GHash *hull_triangles, BLI_mempool *pool,
|
||||
BMVert *v1, BMVert *v2, BMVert *v3)
|
||||
{
|
||||
HullTriangle *t;
|
||||
|
||||
t = BLI_mempool_calloc(pool);
|
||||
t->v[0] = v1;
|
||||
t->v[1] = v2;
|
||||
t->v[2] = v3;
|
||||
|
||||
BLI_ghash_insert(hull_triangles, t, NULL);
|
||||
normal_tri_v3(t->no, v1->co, v2->co, v3->co);
|
||||
}
|
||||
|
||||
static int hull_point_tri_side(const HullTriangle *t, const float co[3])
|
||||
{
|
||||
float p[3], d;
|
||||
sub_v3_v3v3(p, co, t->v[0]->co);
|
||||
d = dot_v3v3(t->no, p);
|
||||
if (d < 0) return -1;
|
||||
else if (d > 0) return 1;
|
||||
else return 0;
|
||||
}
|
||||
|
||||
/* Get all hull triangles that vertex 'v' is outside of */
|
||||
static GHash *hull_triangles_v_outside(GHash *hull_triangles, const BMVert *v)
|
||||
{
|
||||
GHash *outside;
|
||||
GHashIterator iter;
|
||||
|
||||
outside = BLI_ghash_new(BLI_ghashutil_ptrhash,
|
||||
BLI_ghashutil_ptrcmp,
|
||||
"outside");
|
||||
|
||||
GHASH_ITER (iter, hull_triangles) {
|
||||
HullTriangle *t = BLI_ghashIterator_getKey(&iter);
|
||||
|
||||
if (hull_point_tri_side(t, v->co) >= 0)
|
||||
BLI_ghash_insert(outside, t, NULL);
|
||||
}
|
||||
|
||||
return outside;
|
||||
}
|
||||
|
||||
/* Similar to above, but just get true/false rather than triangles */
|
||||
static int hull_test_v_outside(GHash *hull_triangles, const BMVert *v)
|
||||
{
|
||||
GHashIterator iter;
|
||||
|
||||
GHASH_ITER (iter, hull_triangles) {
|
||||
HullTriangle *t = BLI_ghashIterator_getKey(&iter);
|
||||
|
||||
if (hull_point_tri_side(t, v->co) >= 0)
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
|
||||
/* For vertex 'v', find which triangles must be deleted to extend the
|
||||
hull; find the boundary edges of that hole so that it can be filled
|
||||
with connections to the new vertex, and update the hull_triangles
|
||||
to delete the marked triangles */
|
||||
static void add_point(GHash *hull_triangles, BLI_mempool *hull_pool,
|
||||
BLI_mempool *edge_pool, GHash *outside, BMVert *v)
|
||||
{
|
||||
ListBase edges = {NULL, NULL};
|
||||
HullBoundaryEdge *e, *next;
|
||||
GHashIterator iter;
|
||||
|
||||
GHASH_ITER (iter, outside) {
|
||||
HullTriangle *t = BLI_ghashIterator_getKey(&iter);
|
||||
expand_boundary_edges(&edges, edge_pool, t);
|
||||
|
||||
/* Delete the triangle */
|
||||
BLI_ghash_remove(hull_triangles, t, NULL, NULL);
|
||||
BLI_mempool_free(hull_pool, t);
|
||||
}
|
||||
|
||||
/* Fill hole boundary with triangles to new point */
|
||||
for (e = edges.first; e; e = next) {
|
||||
next = e->next;
|
||||
hull_add_triangle(hull_triangles, hull_pool, e->v[0], e->v[1], v);
|
||||
BLI_mempool_free(edge_pool, e);
|
||||
}
|
||||
}
|
||||
|
||||
static BMFace *hull_find_example_face(BMesh *bm, BMEdge *e)
|
||||
{
|
||||
BMIter iter;
|
||||
BMFace *f;
|
||||
|
||||
BM_ITER_ELEM (f, &iter, e, BM_FACES_OF_EDGE) {
|
||||
if (BMO_elem_flag_test(bm, f, HULL_FLAG_INPUT) ||
|
||||
!BMO_elem_flag_test(bm, f, HULL_FLAG_OUTPUT_GEOM))
|
||||
return f;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void hull_output_triangles(BMesh *bm, GHash *hull_triangles)
|
||||
{
|
||||
GHashIterator iter;
|
||||
|
||||
GHASH_ITER (iter, hull_triangles) {
|
||||
HullTriangle *t = BLI_ghashIterator_getKey(&iter);
|
||||
|
||||
if (!t->skip) {
|
||||
BMEdge *edges[3] = {
|
||||
BM_edge_create(bm, t->v[0], t->v[1], NULL, TRUE),
|
||||
BM_edge_create(bm, t->v[1], t->v[2], NULL, TRUE),
|
||||
BM_edge_create(bm, t->v[2], t->v[0], NULL, TRUE)
|
||||
};
|
||||
BMFace *f, *example = NULL;
|
||||
int i;
|
||||
|
||||
/* Look for an adjacent face that existed before the hull */
|
||||
for (i = 0; i < 3; i++) {
|
||||
if (!example)
|
||||
example = hull_find_example_face(bm, edges[i]);
|
||||
}
|
||||
|
||||
f = BM_face_create_quad_tri_v(bm, t->v, 3, example, FALSE);
|
||||
BM_face_copy_shared(bm, f);
|
||||
|
||||
/* Mark face/verts/edges for 'geomout' slot and select */
|
||||
BMO_elem_flag_enable(bm, f, HULL_FLAG_OUTPUT_GEOM);
|
||||
BM_face_select_set(bm, f, TRUE);
|
||||
for (i = 0; i < 3; i++) {
|
||||
BMO_elem_flag_enable(bm, t->v[i], HULL_FLAG_OUTPUT_GEOM);
|
||||
BMO_elem_flag_enable(bm, edges[i], HULL_FLAG_OUTPUT_GEOM);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
/***************************** Final Edges ****************************/
|
||||
|
||||
typedef struct {
|
||||
GHash *edges;
|
||||
BLI_mempool *base_pool, *link_pool;
|
||||
} HullFinalEdges;
|
||||
|
||||
static LinkData *final_edges_find_link(ListBase *adj, BMVert *v)
|
||||
{
|
||||
LinkData *link;
|
||||
|
||||
for (link = adj->first; link; link = link->next) {
|
||||
if (link->data == v)
|
||||
return link;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int hull_final_edges_lookup(HullFinalEdges *final_edges,
|
||||
BMVert *v1, BMVert *v2)
|
||||
{
|
||||
ListBase *adj;
|
||||
|
||||
/* Use lower vertex pointer for hash key */
|
||||
if (v1 > v2)
|
||||
SWAP(BMVert*, v1, v2);
|
||||
|
||||
adj = BLI_ghash_lookup(final_edges->edges, v1);
|
||||
if (!adj)
|
||||
return FALSE;
|
||||
|
||||
return !!final_edges_find_link(adj, v2);
|
||||
}
|
||||
|
||||
/* Used for checking whether a pre-existing edge lies on the hull */
|
||||
static HullFinalEdges *hull_final_edges(GHash *hull_triangles)
|
||||
{
|
||||
HullFinalEdges *final_edges;
|
||||
GHashIterator iter;
|
||||
|
||||
final_edges = MEM_callocN(sizeof(HullFinalEdges), "HullFinalEdges");
|
||||
final_edges->edges = BLI_ghash_new(BLI_ghashutil_ptrhash,
|
||||
BLI_ghashutil_ptrcmp,
|
||||
"final edges ghash");
|
||||
final_edges->base_pool = BLI_mempool_create(sizeof(ListBase), 128, 128, 0);
|
||||
final_edges->link_pool = BLI_mempool_create(sizeof(LinkData), 128, 128, 0);
|
||||
|
||||
GHASH_ITER (iter, hull_triangles) {
|
||||
LinkData *link;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 3; i++) {
|
||||
HullTriangle *t = BLI_ghashIterator_getKey(&iter);
|
||||
BMVert *v1 = t->v[i];
|
||||
BMVert *v2 = t->v[(i + 1) % 3];
|
||||
ListBase *adj;
|
||||
|
||||
/* Use lower vertex pointer for hash key */
|
||||
if (v1 > v2)
|
||||
SWAP(BMVert*, v1, v2);
|
||||
|
||||
adj = BLI_ghash_lookup(final_edges->edges, v1);
|
||||
if (!adj) {
|
||||
adj = BLI_mempool_calloc(final_edges->base_pool);
|
||||
BLI_ghash_insert(final_edges->edges, v1, adj);
|
||||
}
|
||||
|
||||
if (!final_edges_find_link(adj, v2)) {
|
||||
link = BLI_mempool_calloc(final_edges->link_pool);
|
||||
link->data = v2;
|
||||
BLI_addtail(adj, link);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return final_edges;
|
||||
}
|
||||
|
||||
static void hull_final_edges_free(HullFinalEdges *final_edges)
|
||||
{
|
||||
BLI_ghash_free(final_edges->edges, NULL, NULL);
|
||||
BLI_mempool_destroy(final_edges->base_pool);
|
||||
BLI_mempool_destroy(final_edges->link_pool);
|
||||
MEM_freeN(final_edges);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/************************* Initial Tetrahedron ************************/
|
||||
|
||||
static void hull_add_tetrahedron(GHash *hull_triangles, BLI_mempool *pool,
|
||||
BMVert *tetra[4])
|
||||
{
|
||||
float center[3];
|
||||
int i, indices[4][3] = {
|
||||
{0, 1, 2},
|
||||
{0, 2, 3},
|
||||
{1, 0, 3},
|
||||
{2, 1, 3}};
|
||||
|
||||
/* Calculate center */
|
||||
zero_v3(center);
|
||||
for (i = 0; i < 4; i++)
|
||||
add_v3_v3(center, tetra[i]->co);
|
||||
mul_v3_fl(center, 0.25f);
|
||||
|
||||
for (i = 0; i < 4; i++) {
|
||||
BMVert *v1 = tetra[indices[i][0]];
|
||||
BMVert *v2 = tetra[indices[i][1]];
|
||||
BMVert *v3 = tetra[indices[i][2]];
|
||||
float no[3], d[3];
|
||||
|
||||
normal_tri_v3(no, v1->co, v2->co, v3->co);
|
||||
sub_v3_v3v3(d, center, v1->co);
|
||||
if (dot_v3v3(no, d) > 0)
|
||||
SWAP(BMVert*, v1, v3);
|
||||
|
||||
hull_add_triangle(hull_triangles, pool, v1, v2, v3);
|
||||
}
|
||||
}
|
||||
|
||||
/* For each axis, get the minimum and maximum input vertices */
|
||||
static void hull_get_min_max(BMesh *bm, BMOperator *op,
|
||||
BMVert *min[3], BMVert *max[3])
|
||||
{
|
||||
BMOIter oiter;
|
||||
BMVert *v;
|
||||
|
||||
min[0] = min[1] = min[2] = NULL;
|
||||
max[0] = max[1] = max[2] = NULL;
|
||||
|
||||
BMO_ITER (v, &oiter, bm, op, "input", BM_VERT) {
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 3; i++) {
|
||||
if (!min[i] || v->co[i] < min[i]->co[i])
|
||||
min[i] = v;
|
||||
if (!max[i] || v->co[i] > max[i]->co[i])
|
||||
max[i] = v;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Returns true if input is coplanar */
|
||||
static int hull_find_large_tetrahedron(BMesh *bm, BMOperator *op,
|
||||
BMVert *tetra[4])
|
||||
{
|
||||
BMVert *min[3], *max[3], *v;
|
||||
BMOIter oiter;
|
||||
float widest_axis_len, largest_dist, plane_normal[3];
|
||||
int i, j, widest_axis;
|
||||
|
||||
hull_get_min_max(bm, op, min, max);
|
||||
|
||||
/* Check for flat axis */
|
||||
for (i = 0; i < 3; i++) {
|
||||
if (min[i] == max[i]) {
|
||||
return TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
/* Find widest axis */
|
||||
widest_axis_len = 0;
|
||||
for (i = 0; i < 3; i++) {
|
||||
float len = (max[i]->co[i] - min[i]->co[i]);
|
||||
if (len >= widest_axis_len) {
|
||||
widest_axis_len = len;
|
||||
widest_axis = i;
|
||||
}
|
||||
}
|
||||
|
||||
/* Use widest axis for first two points */
|
||||
tetra[0] = min[widest_axis];
|
||||
tetra[1] = max[widest_axis];
|
||||
BMO_elem_flag_enable(bm, tetra[0], HULL_FLAG_TETRA_VERT);
|
||||
BMO_elem_flag_enable(bm, tetra[1], HULL_FLAG_TETRA_VERT);
|
||||
|
||||
/* Choose third vertex farthest from existing line segment */
|
||||
largest_dist = 0;
|
||||
for (i = 0; i < 3; i++) {
|
||||
BMVert *v;
|
||||
float dist;
|
||||
|
||||
if (i == widest_axis)
|
||||
continue;
|
||||
|
||||
v = min[i];
|
||||
for (j = 0; j < 2; j++) {
|
||||
dist = dist_to_line_segment_v3(v->co, tetra[0]->co, tetra[1]->co);
|
||||
if (dist > largest_dist) {
|
||||
largest_dist = dist;
|
||||
tetra[2] = v;
|
||||
}
|
||||
|
||||
v = max[i];
|
||||
}
|
||||
}
|
||||
|
||||
BMO_elem_flag_enable(bm, tetra[2], HULL_FLAG_TETRA_VERT);
|
||||
/* Check for colinear vertices */
|
||||
if (largest_dist < 0.0001)
|
||||
return TRUE;
|
||||
|
||||
/* Choose fourth point farthest from existing plane */
|
||||
largest_dist = 0;
|
||||
normal_tri_v3(plane_normal, tetra[0]->co, tetra[1]->co, tetra[2]->co);
|
||||
BMO_ITER (v, &oiter, bm, op, "input", BM_VERT) {
|
||||
if (!BMO_elem_flag_test(bm, v, HULL_FLAG_TETRA_VERT)) {
|
||||
float dist = dist_to_plane_v3(v->co, tetra[0]->co, plane_normal);
|
||||
if (dist > largest_dist) {
|
||||
largest_dist = dist;
|
||||
tetra[3] = v;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
BMO_elem_flag_enable(bm, tetra[3], HULL_FLAG_TETRA_VERT);
|
||||
if (largest_dist < 0.0001)
|
||||
return TRUE;
|
||||
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**************************** Final Output ****************************/
|
||||
|
||||
static void hull_remove_overlapping(BMesh *bm, GHash *hull_triangles,
|
||||
HullFinalEdges *final_edges)
|
||||
{
|
||||
GHashIterator hull_iter;
|
||||
|
||||
GHASH_ITER (hull_iter, hull_triangles) {
|
||||
HullTriangle *t = BLI_ghashIterator_getKey(&hull_iter);
|
||||
BMIter bm_iter1, bm_iter2;
|
||||
BMFace *f;
|
||||
int f_on_hull;
|
||||
|
||||
BM_ITER_ELEM (f, &bm_iter1, t->v[0], BM_FACES_OF_VERT) {
|
||||
BMEdge *e;
|
||||
|
||||
/* Check that all the face's edges are on the hull,
|
||||
otherwise can't reuse it */
|
||||
f_on_hull = TRUE;
|
||||
BM_ITER_ELEM (e, &bm_iter2, f, BM_EDGES_OF_FACE) {
|
||||
if (!hull_final_edges_lookup(final_edges, e->v1, e->v2)) {
|
||||
f_on_hull = FALSE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Note: can't change ghash while iterating, so mark
|
||||
with 'skip' flag rather than deleting triangles */
|
||||
if (BM_vert_in_face(f, t->v[1]) &&
|
||||
BM_vert_in_face(f, t->v[2]) && f_on_hull) {
|
||||
t->skip = TRUE;
|
||||
BMO_elem_flag_disable(bm, f, HULL_FLAG_INTERIOR_ELE);
|
||||
BMO_elem_flag_enable(bm, f, HULL_FLAG_HOLE);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void hull_mark_interior_elements(BMesh *bm, BMOperator *op,
|
||||
GHash *hull_triangles,
|
||||
HullFinalEdges *final_edges)
|
||||
{
|
||||
BMVert *v;
|
||||
BMEdge *e;
|
||||
BMFace *f;
|
||||
BMOIter oiter;
|
||||
|
||||
/* Check all input vertices again to see if they are actually part
|
||||
of the hull */
|
||||
BMO_ITER (v, &oiter, bm, op, "input", BM_VERT) {
|
||||
if (!hull_test_v_outside(hull_triangles, v)) {
|
||||
/* Mark for 'interior_verts' slot */
|
||||
BMO_elem_flag_enable(bm, v, HULL_FLAG_INTERIOR_ELE);
|
||||
}
|
||||
}
|
||||
|
||||
/* Check for interior edges too */
|
||||
BMO_ITER (e, &oiter, bm, op, "input", BM_EDGE) {
|
||||
if (!hull_final_edges_lookup(final_edges, e->v1, e->v2))
|
||||
BMO_elem_flag_enable(bm, e, HULL_FLAG_INTERIOR_ELE);
|
||||
}
|
||||
|
||||
/* Mark all input faces as interior, some may be unmarked in
|
||||
hull_remove_overlapping() */
|
||||
BMO_ITER (f, &oiter, bm, op, "input", BM_FACE) {
|
||||
BMO_elem_flag_enable(bm, f, HULL_FLAG_INTERIOR_ELE);
|
||||
}
|
||||
}
|
||||
|
||||
static void hull_tag_unused(BMesh *bm, BMOperator *op)
|
||||
{
|
||||
BMIter iter;
|
||||
BMOIter oiter;
|
||||
BMVert *v;
|
||||
BMEdge *e;
|
||||
BMFace *f;
|
||||
|
||||
/* Mark vertices, edges, and faces that are already marked
|
||||
interior (i.e. were already part of the input, but not part of
|
||||
the hull), but that aren't also used by elements outside the
|
||||
input set */
|
||||
BMO_ITER (v, &oiter, bm, op, "input", BM_VERT) {
|
||||
if (BMO_elem_flag_test(bm, v, HULL_FLAG_INTERIOR_ELE)) {
|
||||
int del = TRUE;
|
||||
|
||||
BM_ITER_ELEM(e, &iter, v, BM_EDGES_OF_VERT) {
|
||||
if (!BMO_elem_flag_test(bm, e, HULL_FLAG_INPUT)) {
|
||||
del = FALSE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
BM_ITER_ELEM(f, &iter, v, BM_FACES_OF_VERT) {
|
||||
if (!BMO_elem_flag_test(bm, f, HULL_FLAG_INPUT)) {
|
||||
del = FALSE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (del)
|
||||
BMO_elem_flag_enable(bm, v, HULL_FLAG_DEL);
|
||||
}
|
||||
}
|
||||
|
||||
BMO_ITER (e, &oiter, bm, op, "input", BM_EDGE) {
|
||||
if (BMO_elem_flag_test(bm, e, HULL_FLAG_INTERIOR_ELE)) {
|
||||
int del = TRUE;
|
||||
|
||||
BM_ITER_ELEM(f, &iter, e, BM_FACES_OF_EDGE) {
|
||||
if (!BMO_elem_flag_test(bm, f, HULL_FLAG_INPUT)) {
|
||||
del = FALSE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (del)
|
||||
BMO_elem_flag_enable(bm, e, HULL_FLAG_DEL);
|
||||
}
|
||||
}
|
||||
|
||||
BMO_ITER (f, &oiter, bm, op, "input", BM_FACE) {
|
||||
if (BMO_elem_flag_test(bm, f, HULL_FLAG_INTERIOR_ELE))
|
||||
BMO_elem_flag_enable(bm, f, HULL_FLAG_DEL);
|
||||
}
|
||||
}
|
||||
|
||||
void hull_tag_holes(BMesh *bm, BMOperator *op)
|
||||
{
|
||||
BMIter iter;
|
||||
BMOIter oiter;
|
||||
BMFace *f;
|
||||
BMEdge *e;
|
||||
|
||||
/* Unmark any hole faces if they are isolated or part of a
|
||||
border */
|
||||
BMO_ITER (f, &oiter, bm, op, "input", BM_FACE) {
|
||||
if (BMO_elem_flag_test(bm, f, HULL_FLAG_HOLE)) {
|
||||
BM_ITER_ELEM(e, &iter, f, BM_EDGES_OF_FACE) {
|
||||
if (BM_edge_face_count(e) == 1) {
|
||||
BMO_elem_flag_disable(bm, f, HULL_FLAG_HOLE);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Mark edges too if all adjacent faces are holes */
|
||||
BMO_ITER (e, &oiter, bm, op, "input", BM_EDGE) {
|
||||
int hole = TRUE;
|
||||
|
||||
BM_ITER_ELEM(f, &iter, e, BM_FACES_OF_EDGE) {
|
||||
if (!BMO_elem_flag_test(bm, f, HULL_FLAG_HOLE)) {
|
||||
hole = FALSE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (hole)
|
||||
BMO_elem_flag_enable(bm, e, HULL_FLAG_HOLE);
|
||||
}
|
||||
}
|
||||
|
||||
void bmo_convex_hull_exec(BMesh *bm, BMOperator *op)
|
||||
{
|
||||
HullFinalEdges *final_edges;
|
||||
BLI_mempool *hull_pool, *edge_pool;
|
||||
BMVert *v, *tetra[4];
|
||||
BMElemF *ele;
|
||||
BMOIter oiter;
|
||||
GHash *hull_triangles;
|
||||
|
||||
/* Verify that at least four verts in the input */
|
||||
if (BMO_slot_get(op, "input")->len < 4) {
|
||||
BMO_error_raise(bm, op, BMERR_CONVEX_HULL_FAILED,
|
||||
"Requires at least four vertices");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Initialize the convex hull by building a tetrahedron. A
|
||||
degenerate tetrahedron can cause problems, so report error and
|
||||
fail if the result is coplanar */
|
||||
if (hull_find_large_tetrahedron(bm, op, tetra)) {
|
||||
BMO_error_raise(bm, op, BMERR_CONVEX_HULL_FAILED,
|
||||
"Input vertices are coplanar");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Tag input elements */
|
||||
BMO_ITER (ele, &oiter, bm, op, "input", BM_ALL)
|
||||
BMO_elem_flag_enable(bm, ele, HULL_FLAG_INPUT);
|
||||
|
||||
edge_pool = BLI_mempool_create(sizeof(HullBoundaryEdge), 128, 128, 0);
|
||||
hull_pool = BLI_mempool_create(sizeof(HullTriangle), 128, 128, 0);
|
||||
hull_triangles = BLI_ghash_new(BLI_ghashutil_ptrhash,
|
||||
BLI_ghashutil_ptrcmp,
|
||||
"hull_triangles");
|
||||
|
||||
/* Add tetrahedron triangles */
|
||||
hull_add_tetrahedron(hull_triangles, hull_pool, tetra);
|
||||
|
||||
/* Expand hull to cover new vertices outside the existing hull */
|
||||
BMO_ITER (v, &oiter, bm, op, "input", BM_VERT) {
|
||||
if (!BMO_elem_flag_test(bm, v, HULL_FLAG_TETRA_VERT)) {
|
||||
GHash *outside = hull_triangles_v_outside(hull_triangles, v);
|
||||
if (BLI_ghash_size(outside)) {
|
||||
/* Expand hull and delete interior triangles */
|
||||
add_point(hull_triangles, hull_pool, edge_pool, outside, v);
|
||||
}
|
||||
BLI_ghash_free(outside, NULL, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
BLI_mempool_destroy(edge_pool);
|
||||
final_edges = hull_final_edges(hull_triangles);
|
||||
|
||||
hull_mark_interior_elements(bm, op, hull_triangles, final_edges);
|
||||
|
||||
/* Remove hull triangles covered by an existing face */
|
||||
if (BMO_slot_bool_get(op, "use_existing_faces")) {
|
||||
hull_remove_overlapping(bm, hull_triangles, final_edges);
|
||||
|
||||
hull_tag_holes(bm, op);
|
||||
}
|
||||
|
||||
/* Done with edges */
|
||||
hull_final_edges_free(final_edges);
|
||||
|
||||
/* Convert hull triangles to BMesh faces */
|
||||
hull_output_triangles(bm, hull_triangles);
|
||||
BLI_mempool_destroy(hull_pool);
|
||||
|
||||
BLI_ghash_free(hull_triangles, NULL, NULL);
|
||||
|
||||
hull_tag_unused(bm, op);
|
||||
|
||||
/* Output slot of input elements that ended up inside the hull
|
||||
rather than part of it */
|
||||
BMO_slot_buffer_from_enabled_flag(bm, op, "interior_geom", BM_ALL,
|
||||
HULL_FLAG_INTERIOR_ELE);
|
||||
|
||||
/* Output slot of input elements that ended up inside the hull and
|
||||
* are are unused by other geometry. */
|
||||
BMO_slot_buffer_from_enabled_flag(bm, op, "unused_geom", BM_ALL,
|
||||
HULL_FLAG_DEL);
|
||||
|
||||
/* Output slot of faces and edges that were in the input and on
|
||||
the hull (useful for cases like bridging where you want to
|
||||
delete some input geometry) */
|
||||
BMO_slot_buffer_from_enabled_flag(bm, op, "holes_geom", BM_ALL,
|
||||
HULL_FLAG_HOLE);
|
||||
|
||||
/* Output slot of all hull vertices, faces, and edges */
|
||||
BMO_slot_buffer_from_enabled_flag(bm, op, "geomout", BM_ALL,
|
||||
HULL_FLAG_OUTPUT_GEOM);
|
||||
}
|
@ -3123,10 +3123,22 @@ static int edbm_tris_convert_to_quads_exec(bContext *C, wmOperator *op)
|
||||
return OPERATOR_FINISHED;
|
||||
}
|
||||
|
||||
void MESH_OT_tris_convert_to_quads(wmOperatorType *ot)
|
||||
static void join_triangle_props(wmOperatorType *ot)
|
||||
{
|
||||
PropertyRNA *prop;
|
||||
|
||||
prop = RNA_def_float_rotation(ot->srna, "limit", 0, NULL, 0.0f, DEG2RADF(180.0f),
|
||||
"Max Angle", "Angle Limit", 0.0f, DEG2RADF(180.0f));
|
||||
RNA_def_property_float_default(prop, DEG2RADF(40.0f));
|
||||
|
||||
RNA_def_boolean(ot->srna, "uvs", 0, "Compare UVs", "");
|
||||
RNA_def_boolean(ot->srna, "vcols", 0, "Compare VCols", "");
|
||||
RNA_def_boolean(ot->srna, "sharp", 0, "Compare Sharp", "");
|
||||
RNA_def_boolean(ot->srna, "materials", 0, "Compare Materials", "");
|
||||
}
|
||||
|
||||
void MESH_OT_tris_convert_to_quads(wmOperatorType *ot)
|
||||
{
|
||||
/* identifiers */
|
||||
ot->name = "Tris to Quads";
|
||||
ot->idname = "MESH_OT_tris_convert_to_quads";
|
||||
@ -3139,14 +3151,7 @@ void MESH_OT_tris_convert_to_quads(wmOperatorType *ot)
|
||||
/* flags */
|
||||
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
|
||||
|
||||
prop = RNA_def_float_rotation(ot->srna, "limit", 0, NULL, 0.0f, DEG2RADF(180.0f),
|
||||
"Max Angle", "Angle Limit", 0.0f, DEG2RADF(180.0f));
|
||||
RNA_def_property_float_default(prop, DEG2RADF(40.0f));
|
||||
|
||||
RNA_def_boolean(ot->srna, "uvs", 0, "Compare UVs", "");
|
||||
RNA_def_boolean(ot->srna, "vcols", 0, "Compare VCols", "");
|
||||
RNA_def_boolean(ot->srna, "sharp", 0, "Compare Sharp", "");
|
||||
RNA_def_boolean(ot->srna, "materials", 0, "Compare Materials", "");
|
||||
join_triangle_props(ot);
|
||||
}
|
||||
|
||||
static int edbm_dissolve_exec(bContext *C, wmOperator *op)
|
||||
@ -4335,3 +4340,93 @@ void MESH_OT_wireframe(wmOperatorType *ot)
|
||||
RNA_def_boolean(ot->srna, "use_replace", TRUE, "Replace", "Remove original faces");
|
||||
}
|
||||
|
||||
static int edbm_convex_hull_exec(bContext *C, wmOperator *op)
|
||||
{
|
||||
Object *obedit = CTX_data_edit_object(C);
|
||||
BMEditMesh *em = BMEdit_FromObject(obedit);
|
||||
BMOperator bmop;
|
||||
|
||||
EDBM_op_init(em, &bmop, op, "convex_hull input=%hvef "
|
||||
"use_existing_faces=%b",
|
||||
BM_ELEM_SELECT,
|
||||
RNA_boolean_get(op->ptr, "use_existing_faces"));
|
||||
BMO_op_exec(em->bm, &bmop);
|
||||
|
||||
/* Hull fails if input is coplanar */
|
||||
if (BMO_error_occurred(em->bm)) {
|
||||
EDBM_op_finish(em, &bmop, op, TRUE);
|
||||
return OPERATOR_CANCELLED;
|
||||
}
|
||||
|
||||
|
||||
/* Delete unused vertices, edges, and faces */
|
||||
if (RNA_boolean_get(op->ptr, "delete_unused")) {
|
||||
if(!EDBM_op_callf(em, op, "del geom=%s context=%i",
|
||||
&bmop, "unused_geom", DEL_ONLYTAGGED)) {
|
||||
EDBM_op_finish(em, &bmop, op, TRUE);
|
||||
return OPERATOR_CANCELLED;
|
||||
}
|
||||
}
|
||||
|
||||
/* Delete hole edges/faces */
|
||||
if (RNA_boolean_get(op->ptr, "make_holes")) {
|
||||
if(!EDBM_op_callf(em, op, "del geom=%s context=%i",
|
||||
&bmop, "holes_geom", DEL_ONLYTAGGED)) {
|
||||
EDBM_op_finish(em, &bmop, op, TRUE);
|
||||
return OPERATOR_CANCELLED;
|
||||
}
|
||||
}
|
||||
|
||||
/* Merge adjacent triangles */
|
||||
if (RNA_boolean_get(op->ptr, "join_triangles")) {
|
||||
if(!EDBM_op_callf(em, op, "join_triangles faces=%s limit=%f",
|
||||
&bmop, "geomout",
|
||||
RNA_float_get(op->ptr, "limit"))) {
|
||||
EDBM_op_finish(em, &bmop, op, TRUE);
|
||||
return OPERATOR_CANCELLED;
|
||||
}
|
||||
}
|
||||
|
||||
if (!EDBM_op_finish(em, &bmop, op, TRUE)) {
|
||||
return OPERATOR_CANCELLED;
|
||||
}
|
||||
else {
|
||||
EDBM_update_generic(C, em, TRUE);
|
||||
EDBM_selectmode_flush(em);
|
||||
return OPERATOR_FINISHED;
|
||||
}
|
||||
}
|
||||
|
||||
void MESH_OT_convex_hull(wmOperatorType *ot)
|
||||
{
|
||||
/* identifiers */
|
||||
ot->name = "Convex Hull";
|
||||
ot->description = "Enclose selected vertices in a convex polyhedron";
|
||||
ot->idname = "MESH_OT_convex_hull";
|
||||
|
||||
/* api callbacks */
|
||||
ot->exec = edbm_convex_hull_exec;
|
||||
ot->poll = EM_view3d_poll;
|
||||
|
||||
/* flags */
|
||||
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
|
||||
|
||||
/* props */
|
||||
RNA_def_boolean(ot->srna, "delete_unused", TRUE,
|
||||
"Delete Unused",
|
||||
"Delete selected elements that are not used by the hull");
|
||||
|
||||
RNA_def_boolean(ot->srna, "use_existing_faces", TRUE,
|
||||
"Use Existing Faces",
|
||||
"Skip hull triangles that are covered by a pre-existing face");
|
||||
|
||||
RNA_def_boolean(ot->srna, "make_holes", FALSE,
|
||||
"Make Holes",
|
||||
"Delete selected faces that are used by the hull");
|
||||
|
||||
RNA_def_boolean(ot->srna, "join_triangles", TRUE,
|
||||
"Join Triangles",
|
||||
"Merge adjacent triangles into quads");
|
||||
|
||||
join_triangle_props(ot);
|
||||
}
|
||||
|
@ -214,6 +214,8 @@ void MESH_OT_inset(struct wmOperatorType *ot);
|
||||
void MESH_OT_wireframe(struct wmOperatorType *ot);
|
||||
void MESH_OT_vert_slide(struct wmOperatorType *ot);
|
||||
|
||||
void MESH_OT_convex_hull(struct wmOperatorType *ot);
|
||||
|
||||
/* ******************* mesh_navmesh.c */
|
||||
void MESH_OT_navmesh_make(struct wmOperatorType *ot);
|
||||
void MESH_OT_navmesh_face_copy(struct wmOperatorType *ot);
|
||||
|
@ -167,6 +167,8 @@ void ED_operatortypes_mesh(void)
|
||||
WM_operatortype_append(MESH_OT_wireframe);
|
||||
WM_operatortype_append(MESH_OT_edge_split);
|
||||
|
||||
WM_operatortype_append(MESH_OT_convex_hull);
|
||||
|
||||
#ifdef WITH_GAMEENGINE
|
||||
WM_operatortype_append(MESH_OT_navmesh_make);
|
||||
WM_operatortype_append(MESH_OT_navmesh_face_copy);
|
||||
|
Loading…
Reference in New Issue
Block a user