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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "DEG_depsgraph_query.h"
#include "node_geometry_util.hh"
#include "BKE_lib_id.h"
#include "BKE_mesh.h"
#include "BKE_mesh_runtime.h"
#include "BKE_mesh_wrapper.h"
#include "BKE_object.h"
#include "BKE_volume.h"
#include "GEO_mesh_to_volume.hh"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "UI_interface.h"
#include "UI_resources.h"
namespace blender::nodes::node_geo_mesh_to_volume_cc {
NODE_STORAGE_FUNCS(NodeGeometryMeshToVolume)
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>(N_("Mesh")).supported_type(GEO_COMPONENT_TYPE_MESH);
b.add_input<decl::Float>(N_("Density")).default_value(1.0f).min(0.01f).max(FLT_MAX);
b.add_input<decl::Float>(N_("Voxel Size"))
.default_value(0.3f)
.min(0.01f)
.max(FLT_MAX)
.subtype(PROP_DISTANCE);
b.add_input<decl::Float>(N_("Voxel Amount")).default_value(64.0f).min(0.0f).max(FLT_MAX);
b.add_input<decl::Float>(N_("Exterior Band Width"))
.default_value(0.1f)
.min(0.0f)
.max(FLT_MAX)
.subtype(PROP_DISTANCE)
.description(N_("Width of the volume outside of the mesh"));
b.add_input<decl::Float>(N_("Interior Band Width"))
.default_value(0.0f)
.min(0.0f)
.max(FLT_MAX)
.subtype(PROP_DISTANCE)
.description(N_("Width of the volume inside of the mesh"));
b.add_input<decl::Bool>(N_("Fill Volume"))
.default_value(true)
.description(N_("Initialize the density grid in every cell inside the enclosed volume"));
b.add_output<decl::Geometry>(N_("Volume"));
}
static void node_layout(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
{
uiLayoutSetPropSep(layout, true);
uiLayoutSetPropDecorate(layout, false);
uiItemR(layout, ptr, "resolution_mode", 0, IFACE_("Resolution"), ICON_NONE);
}
static void node_init(bNodeTree * /*tree*/, bNode *node)
{
NodeGeometryMeshToVolume *data = MEM_cnew<NodeGeometryMeshToVolume>(__func__);
data->resolution_mode = MESH_TO_VOLUME_RESOLUTION_MODE_VOXEL_AMOUNT;
node->storage = data;
}
static void node_update(bNodeTree *ntree, bNode *node)
{
NodeGeometryMeshToVolume &data = node_storage(*node);
bNodeSocket *voxel_size_socket = nodeFindSocket(node, SOCK_IN, "Voxel Size");
bNodeSocket *voxel_amount_socket = nodeFindSocket(node, SOCK_IN, "Voxel Amount");
nodeSetSocketAvailability(ntree,
voxel_amount_socket,
data.resolution_mode == MESH_TO_VOLUME_RESOLUTION_MODE_VOXEL_AMOUNT);
nodeSetSocketAvailability(
ntree, voxel_size_socket, data.resolution_mode == MESH_TO_VOLUME_RESOLUTION_MODE_VOXEL_SIZE);
}
#ifdef WITH_OPENVDB
static Volume *create_volume_from_mesh(const Mesh &mesh, GeoNodeExecParams ¶ms)
{
const NodeGeometryMeshToVolume &storage =
*(const NodeGeometryMeshToVolume *)params.node().storage;
const float density = params.get_input<float>("Density");
const float exterior_band_width = params.get_input<float>("Exterior Band Width");
const float interior_band_width = params.get_input<float>("Interior Band Width");
const bool fill_volume = params.get_input<bool>("Fill Volume");
geometry::MeshToVolumeResolution resolution;
resolution.mode = (MeshToVolumeModifierResolutionMode)storage.resolution_mode;
if (resolution.mode == MESH_TO_VOLUME_RESOLUTION_MODE_VOXEL_AMOUNT) {
resolution.settings.voxel_amount = params.get_input<float>("Voxel Amount");
if (resolution.settings.voxel_amount <= 0.0f) {
return nullptr;
}
}
else if (resolution.mode == MESH_TO_VOLUME_RESOLUTION_MODE_VOXEL_SIZE) {
resolution.settings.voxel_size = params.get_input<float>("Voxel Size");
if (resolution.settings.voxel_size <= 0.0f) {
return nullptr;
}
}
if (mesh.totvert == 0 || mesh.totpoly == 0) {
return nullptr;
}
const float4x4 mesh_to_volume_space_transform = float4x4::identity();
auto bounds_fn = [&](float3 &r_min, float3 &r_max) {
float3 min{std::numeric_limits<float>::max()};
float3 max{-std::numeric_limits<float>::max()};
BKE_mesh_wrapper_minmax(&mesh, min, max);
r_min = min;
r_max = max;
};
const float voxel_size = geometry::volume_compute_voxel_size(params.depsgraph(),
bounds_fn,
resolution,
exterior_band_width,
mesh_to_volume_space_transform);
Volume *volume = reinterpret_cast<Volume *>(BKE_id_new_nomain(ID_VO, nullptr));
BKE_volume_init_grids(volume);
/* Convert mesh to grid and add to volume. */
geometry::volume_grid_add_from_mesh(volume,
"density",
&mesh,
mesh_to_volume_space_transform,
voxel_size,
fill_volume,
exterior_band_width,
interior_band_width,
density);
return volume;
}
#endif /* WITH_OPENVDB */
static void node_geo_exec(GeoNodeExecParams params)
{
#ifdef WITH_OPENVDB
GeometrySet geometry_set(params.extract_input<GeometrySet>("Mesh"));
geometry_set.modify_geometry_sets([&](GeometrySet &geometry_set) {
if (geometry_set.has_mesh()) {
Volume *volume = create_volume_from_mesh(*geometry_set.get_mesh_for_read(), params);
geometry_set.replace_volume(volume);
geometry_set.keep_only_during_modify({GEO_COMPONENT_TYPE_VOLUME});
}
});
params.set_output("Volume", std::move(geometry_set));
#else
params.set_default_remaining_outputs();
params.error_message_add(NodeWarningType::Error,
TIP_("Disabled, Blender was compiled without OpenVDB"));
return;
#endif
}
} // namespace blender::nodes::node_geo_mesh_to_volume_cc
void register_node_type_geo_mesh_to_volume()
{
namespace file_ns = blender::nodes::node_geo_mesh_to_volume_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_MESH_TO_VOLUME, "Mesh to Volume", NODE_CLASS_GEOMETRY);
ntype.declare = file_ns::node_declare;
node_type_size(&ntype, 200, 120, 700);
ntype.initfunc = file_ns::node_init;
ntype.updatefunc = file_ns::node_update;
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.draw_buttons = file_ns::node_layout;
node_type_storage(
&ntype, "NodeGeometryMeshToVolume", node_free_standard_storage, node_copy_standard_storage);
nodeRegisterType(&ntype);
}
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