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/*
* 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.
*/
#include "MEM_guardedalloc.h"
#include "BLI_alloca.h"
#include "BLI_math_matrix.h"
#include "DNA_mesh_types.h"
#include "DNA_modifier_types.h"
#include "RNA_enum_types.h"
#include "UI_interface.h"
#include "UI_resources.h"
#include "BKE_mesh.h"
#include "bmesh.h"
#include "tools/bmesh_boolean.h"
#include "node_geometry_util.hh"
static bNodeSocketTemplate geo_node_boolean_in[] = {
{SOCK_GEOMETRY, N_("Geometry 1")},
{SOCK_GEOMETRY, N_("Geometry 2")},
{-1, ""},
};
static bNodeSocketTemplate geo_node_boolean_out[] = {
{SOCK_GEOMETRY, N_("Geometry")},
{-1, ""},
};
static void geo_node_boolean_layout(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
{
uiItemR(layout, ptr, "operation", 0, "", ICON_NONE);
}
static int bm_face_isect_pair(BMFace *f, void *UNUSED(user_data))
{
return BM_elem_flag_test(f, BM_ELEM_DRAW) ? 1 : 0;
}
static Mesh *mesh_boolean_calc(const Mesh *mesh_a, const Mesh *mesh_b, int boolean_mode)
{
const BMAllocTemplate allocsize = BMALLOC_TEMPLATE_FROM_ME(mesh_a, mesh_b);
BMesh *bm;
{
struct BMeshCreateParams bmesh_create_params = {0};
bmesh_create_params.use_toolflags = false;
bm = BM_mesh_create(&allocsize, &bmesh_create_params);
}
{
struct BMeshFromMeshParams bmesh_from_mesh_params = {0};
bmesh_from_mesh_params.calc_face_normal = true;
BM_mesh_bm_from_me(bm, mesh_b, &bmesh_from_mesh_params);
BM_mesh_bm_from_me(bm, mesh_a, &bmesh_from_mesh_params);
}
const int looptris_tot = poly_to_tri_count(bm->totface, bm->totloop);
int tottri;
BMLoop *(*looptris)[3] = (BMLoop *
(*)[3])(MEM_malloc_arrayN(looptris_tot, sizeof(*looptris), __func__));
BM_mesh_calc_tessellation_beauty(bm, looptris, &tottri);
const int i_faces_end = mesh_b->totpoly;
/* We need face normals because of 'BM_face_split_edgenet'
* we could calculate on the fly too (before calling split). */
int i = 0;
BMIter iter;
BMFace *bm_face;
BM_ITER_MESH (bm_face, &iter, bm, BM_FACES_OF_MESH) {
normalize_v3(bm_face->no);
/* Temp tag to test which side split faces are from. */
BM_elem_flag_enable(bm_face, BM_ELEM_DRAW);
i++;
if (i == i_faces_end) {
break;
}
}
BM_mesh_boolean(
bm, looptris, tottri, bm_face_isect_pair, nullptr, 2, false, false, false, boolean_mode);
Mesh *result = BKE_mesh_from_bmesh_for_eval_nomain(bm, nullptr, mesh_a);
BM_mesh_free(bm);
result->runtime.cd_dirty_vert |= CD_MASK_NORMAL;
MEM_freeN(looptris);
return result;
}
namespace blender::nodes {
static void geo_node_boolean_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set_in_a = params.extract_input<GeometrySet>("Geometry 1");
GeometrySet geometry_set_in_b = params.extract_input<GeometrySet>("Geometry 2");
GeometrySet geometry_set_out;
GeometryNodeBooleanOperation operation = (GeometryNodeBooleanOperation)params.node().custom1;
if (operation < 0 || operation > 2) {
BLI_assert(false);
params.set_output("Geometry", std::move(geometry_set_out));
return;
}
/* TODO: Boolean does support an input of multiple meshes. Currently they must all be
* converted to BMesh before running the operation though. D9957 will make it possible
* to use the mesh structure directly. */
geometry_set_in_a = geometry_set_realize_instances(geometry_set_in_a);
geometry_set_in_b = geometry_set_realize_instances(geometry_set_in_b);
const Mesh *mesh_in_a = geometry_set_in_a.get_mesh_for_read();
const Mesh *mesh_in_b = geometry_set_in_b.get_mesh_for_read();
if (mesh_in_a == nullptr || mesh_in_b == nullptr) {
if (operation == GEO_NODE_BOOLEAN_UNION) {
if (mesh_in_a != nullptr) {
params.set_output("Geometry", geometry_set_in_a);
}
else {
params.set_output("Geometry", geometry_set_in_b);
}
}
else {
params.set_output("Geometry", geometry_set_in_a);
}
return;
}
Mesh *mesh_out = mesh_boolean_calc(mesh_in_a, mesh_in_b, operation);
geometry_set_out = GeometrySet::create_with_mesh(mesh_out);
params.set_output("Geometry", std::move(geometry_set_out));
}
} // namespace blender::nodes
void register_node_type_geo_boolean()
{
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_BOOLEAN, "Boolean", NODE_CLASS_GEOMETRY, 0);
node_type_socket_templates(&ntype, geo_node_boolean_in, geo_node_boolean_out);
ntype.draw_buttons = geo_node_boolean_layout;
ntype.geometry_node_execute = blender::nodes::geo_node_boolean_exec;
nodeRegisterType(&ntype);
}
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