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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.
*
* The Original Code is Copyright (C) 2005 by the Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup modifiers
*/
#include <cstring>
#include <iostream>
#include <string>
#include "MEM_guardedalloc.h"
#include "BLI_float3.hh"
#include "BLI_listbase.h"
#include "BLI_set.hh"
#include "BLI_string.h"
#include "BLI_utildefines.h"
#include "DNA_defaults.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "DNA_node_types.h"
#include "DNA_object_types.h"
#include "DNA_pointcloud_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "BKE_customdata.h"
#include "BKE_idprop.h"
#include "BKE_lib_query.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_pointcloud.h"
#include "BKE_screen.h"
#include "BKE_simulation.h"
#include "BLO_read_write.h"
#include "UI_interface.h"
#include "UI_resources.h"
#include "RNA_access.h"
#include "RNA_enum_types.h"
#include "DEG_depsgraph_build.h"
#include "DEG_depsgraph_query.h"
#include "MOD_modifiertypes.h"
#include "MOD_nodes.h"
#include "MOD_ui_common.h"
#include "NOD_derived_node_tree.hh"
#include "NOD_geometry.h"
#include "NOD_geometry_exec.hh"
#include "NOD_node_tree_multi_function.hh"
#include "NOD_type_callbacks.hh"
using blender::float3;
using blender::IndexRange;
using blender::Map;
using blender::Set;
using blender::Span;
using blender::StringRef;
using blender::Vector;
using blender::fn::GMutablePointer;
using blender::fn::GValueMap;
using blender::nodes::GeoNodeExecParams;
using namespace blender::nodes::derived_node_tree_types;
using namespace blender::fn::multi_function_types;
static void initData(ModifierData *md)
{
NodesModifierData *nmd = (NodesModifierData *)md;
BLI_assert(MEMCMP_STRUCT_AFTER_IS_ZERO(nmd, modifier));
MEMCPY_STRUCT_AFTER(nmd, DNA_struct_default_get(NodesModifierData), modifier);
}
static void addIdsUsedBySocket(const ListBase *sockets, Set<ID *> &ids)
{
LISTBASE_FOREACH (const bNodeSocket *, socket, sockets) {
if (socket->type == SOCK_OBJECT) {
Object *object = ((bNodeSocketValueObject *)socket->default_value)->value;
if (object != nullptr) {
ids.add(&object->id);
}
}
}
}
static void findUsedIds(const bNodeTree &tree, Set<ID *> &ids)
{
Set<const bNodeTree *> handled_groups;
LISTBASE_FOREACH (const bNode *, node, &tree.nodes) {
addIdsUsedBySocket(&node->inputs, ids);
addIdsUsedBySocket(&node->outputs, ids);
if (node->type == NODE_GROUP) {
const bNodeTree *group = (bNodeTree *)node->id;
if (group != nullptr && handled_groups.add(group)) {
findUsedIds(*group, ids);
}
}
}
}
static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphContext *ctx)
{
NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
if (nmd->node_group != nullptr) {
DEG_add_node_tree_relation(ctx->node, nmd->node_group, "Nodes Modifier");
Set<ID *> used_ids;
findUsedIds(*nmd->node_group, used_ids);
for (ID *id : used_ids) {
if (GS(id->name) == ID_OB) {
Object *object = reinterpret_cast<Object *>(id);
DEG_add_object_relation(ctx->node, object, DEG_OB_COMP_TRANSFORM, "Nodes Modifier");
if (id != &ctx->object->id) {
if (object->type != OB_EMPTY) {
DEG_add_object_relation(
ctx->node, (Object *)id, DEG_OB_COMP_GEOMETRY, "Nodes Modifier");
}
}
}
}
}
/* TODO: Add relations for IDs in settings. */
}
static void foreachIDLink(ModifierData *md, Object *ob, IDWalkFunc walk, void *userData)
{
NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
walk(userData, ob, (ID **)&nmd->node_group, IDWALK_CB_USER);
struct ForeachSettingData {
IDWalkFunc walk;
void *userData;
Object *ob;
} settings = {walk, userData, ob};
IDP_foreach_property(
nmd->settings.properties,
IDP_TYPE_FILTER_ID,
[](IDProperty *id_prop, void *user_data) {
ForeachSettingData *settings = (ForeachSettingData *)user_data;
settings->walk(
settings->userData, settings->ob, (ID **)&id_prop->data.pointer, IDWALK_CB_USER);
},
&settings);
}
static bool isDisabled(const struct Scene *UNUSED(scene),
ModifierData *md,
bool UNUSED(useRenderParams))
{
NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
if (nmd->node_group == nullptr) {
return true;
}
return false;
}
class GeometryNodesEvaluator {
private:
blender::LinearAllocator<> allocator_;
Map<const DInputSocket *, GMutablePointer> value_by_input_;
Vector<const DInputSocket *> group_outputs_;
blender::nodes::MultiFunctionByNode &mf_by_node_;
const blender::nodes::DataTypeConversions &conversions_;
const blender::bke::PersistentDataHandleMap &handle_map_;
const Object *self_object_;
public:
GeometryNodesEvaluator(const Map<const DOutputSocket *, GMutablePointer> &group_input_data,
Vector<const DInputSocket *> group_outputs,
blender::nodes::MultiFunctionByNode &mf_by_node,
const blender::bke::PersistentDataHandleMap &handle_map,
const Object *self_object)
: group_outputs_(std::move(group_outputs)),
mf_by_node_(mf_by_node),
conversions_(blender::nodes::get_implicit_type_conversions()),
handle_map_(handle_map),
self_object_(self_object)
{
for (auto item : group_input_data.items()) {
this->forward_to_inputs(*item.key, item.value);
}
}
Vector<GMutablePointer> execute()
{
Vector<GMutablePointer> results;
for (const DInputSocket *group_output : group_outputs_) {
GMutablePointer result = this->get_input_value(*group_output);
results.append(result);
}
for (GMutablePointer value : value_by_input_.values()) {
value.destruct();
}
return results;
}
private:
GMutablePointer get_input_value(const DInputSocket &socket_to_compute)
{
std::optional<GMutablePointer> value = value_by_input_.pop_try(&socket_to_compute);
if (value.has_value()) {
/* This input has been computed before, return it directly. */
return *value;
}
Span<const DOutputSocket *> from_sockets = socket_to_compute.linked_sockets();
Span<const DGroupInput *> from_group_inputs = socket_to_compute.linked_group_inputs();
const int total_inputs = from_sockets.size() + from_group_inputs.size();
BLI_assert(total_inputs <= 1);
if (total_inputs == 0) {
/* The input is not connected, use the value from the socket itself. */
return get_unlinked_input_value(socket_to_compute);
}
if (from_group_inputs.size() == 1) {
/* The input gets its value from the input of a group that is not further connected. */
return get_unlinked_input_value(socket_to_compute);
}
/* Compute the socket now. */
const DOutputSocket &from_socket = *from_sockets[0];
this->compute_output_and_forward(from_socket);
return value_by_input_.pop(&socket_to_compute);
}
void compute_output_and_forward(const DOutputSocket &socket_to_compute)
{
const DNode &node = socket_to_compute.node();
const bNode &bnode = *node.bnode();
if (!socket_to_compute.is_available()) {
/* If the output is not available, use a default value. */
const CPPType &type = *blender::nodes::socket_cpp_type_get(*socket_to_compute.typeinfo());
void *buffer = allocator_.allocate(type.size(), type.alignment());
type.copy_to_uninitialized(type.default_value(), buffer);
this->forward_to_inputs(socket_to_compute, {type, buffer});
return;
}
/* Prepare inputs required to execute the node. */
GValueMap<StringRef> node_inputs_map{allocator_};
for (const DInputSocket *input_socket : node.inputs()) {
if (input_socket->is_available()) {
GMutablePointer value = this->get_input_value(*input_socket);
node_inputs_map.add_new_direct(input_socket->identifier(), value);
}
}
/* Execute the node. */
GValueMap<StringRef> node_outputs_map{allocator_};
GeoNodeExecParams params{bnode, node_inputs_map, node_outputs_map, handle_map_, self_object_};
this->execute_node(node, params);
/* Forward computed outputs to linked input sockets. */
for (const DOutputSocket *output_socket : node.outputs()) {
if (output_socket->is_available()) {
GMutablePointer value = node_outputs_map.extract(output_socket->identifier());
this->forward_to_inputs(*output_socket, value);
}
}
}
void execute_node(const DNode &node, GeoNodeExecParams params)
{
const bNode &bnode = params.node();
if (bnode.typeinfo->geometry_node_execute != nullptr) {
bnode.typeinfo->geometry_node_execute(params);
return;
}
/* Use the multi-function implementation of the node. */
const MultiFunction &fn = *mf_by_node_.lookup(&node);
MFContextBuilder fn_context;
MFParamsBuilder fn_params{fn, 1};
Vector<GMutablePointer> input_data;
for (const DInputSocket *dsocket : node.inputs()) {
if (dsocket->is_available()) {
GMutablePointer data = params.extract_input(dsocket->identifier());
fn_params.add_readonly_single_input(GSpan(*data.type(), data.get(), 1));
input_data.append(data);
}
}
Vector<GMutablePointer> output_data;
for (const DOutputSocket *dsocket : node.outputs()) {
if (dsocket->is_available()) {
const CPPType &type = *blender::nodes::socket_cpp_type_get(*dsocket->typeinfo());
void *buffer = allocator_.allocate(type.size(), type.alignment());
fn_params.add_uninitialized_single_output(GMutableSpan(type, buffer, 1));
output_data.append(GMutablePointer(type, buffer));
}
}
fn.call(IndexRange(1), fn_params, fn_context);
for (GMutablePointer value : input_data) {
value.destruct();
}
int output_index = 0;
for (const int i : node.outputs().index_range()) {
if (node.output(i).is_available()) {
GMutablePointer value = output_data[output_index];
params.set_output_by_move(node.output(i).identifier(), value);
value.destruct();
output_index++;
}
}
}
void forward_to_inputs(const DOutputSocket &from_socket, GMutablePointer value_to_forward)
{
Span<const DInputSocket *> to_sockets_all = from_socket.linked_sockets();
const CPPType &from_type = *value_to_forward.type();
Vector<const DInputSocket *> to_sockets_same_type;
for (const DInputSocket *to_socket : to_sockets_all) {
const CPPType &to_type = *blender::nodes::socket_cpp_type_get(*to_socket->typeinfo());
if (from_type == to_type) {
to_sockets_same_type.append(to_socket);
}
else {
void *buffer = allocator_.allocate(to_type.size(), to_type.alignment());
if (conversions_.is_convertible(from_type, to_type)) {
conversions_.convert(from_type, to_type, value_to_forward.get(), buffer);
}
else {
to_type.copy_to_uninitialized(to_type.default_value(), buffer);
}
value_by_input_.add_new(to_socket, GMutablePointer{to_type, buffer});
}
}
if (to_sockets_same_type.size() == 0) {
/* This value is not further used, so destruct it. */
value_to_forward.destruct();
}
else if (to_sockets_same_type.size() == 1) {
/* This value is only used on one input socket, no need to copy it. */
const DInputSocket *to_socket = to_sockets_same_type[0];
value_by_input_.add_new(to_socket, value_to_forward);
}
else {
/* Multiple inputs use the value, make a copy for every input except for one. */
const DInputSocket *first_to_socket = to_sockets_same_type[0];
Span<const DInputSocket *> other_to_sockets = to_sockets_same_type.as_span().drop_front(1);
const CPPType &type = *value_to_forward.type();
value_by_input_.add_new(first_to_socket, value_to_forward);
for (const DInputSocket *to_socket : other_to_sockets) {
void *buffer = allocator_.allocate(type.size(), type.alignment());
type.copy_to_uninitialized(value_to_forward.get(), buffer);
value_by_input_.add_new(to_socket, GMutablePointer{type, buffer});
}
}
}
GMutablePointer get_unlinked_input_value(const DInputSocket &socket)
{
bNodeSocket *bsocket;
if (socket.linked_group_inputs().size() == 0) {
bsocket = socket.bsocket();
}
else {
bsocket = socket.linked_group_inputs()[0]->bsocket();
}
const CPPType &type = *blender::nodes::socket_cpp_type_get(*socket.typeinfo());
void *buffer = allocator_.allocate(type.size(), type.alignment());
if (bsocket->type == SOCK_OBJECT) {
Object *object = ((bNodeSocketValueObject *)bsocket->default_value)->value;
blender::bke::PersistentObjectHandle object_handle = handle_map_.lookup(object);
new (buffer) blender::bke::PersistentObjectHandle(object_handle);
}
else {
blender::nodes::socket_cpp_value_get(*bsocket, buffer);
}
return {type, buffer};
}
};
/**
* This code is responsible for creating the new property and also creating the group of
* properties in the prop_ui_container group for the UI info, the mapping for which is
* scattered about in RNA_access.c.
*
* TODO(Hans): Codify this with some sort of table or refactor IDProperty use in RNA_access.c.
*/
struct SocketPropertyType {
/* Create the actual propery used to store the data for the modifier. */
IDProperty *(*create_prop)(const bNodeSocket &socket, const char *name);
/* Reused to build the "soft_min" property too. */
IDProperty *(*create_min_ui_prop)(const bNodeSocket &socket, const char *name);
/* Reused to build the "soft_max" property too. */
IDProperty *(*create_max_ui_prop)(const bNodeSocket &socket, const char *name);
/* This uses the same values as #create_prop, but sometimes the type is different, so it can't
* be the same function. */
IDProperty *(*create_default_ui_prop)(const bNodeSocket &socket, const char *name);
PropertyType (*rna_subtype_get)(const bNodeSocket &socket);
bool (*is_correct_type)(const IDProperty &property);
void (*init_cpp_value)(const IDProperty &property, void *r_value);
};
static IDProperty *socket_add_property(IDProperty *settings_prop_group,
IDProperty *ui_container,
const SocketPropertyType &property_type,
const bNodeSocket &socket)
{
const char *new_prop_name = socket.identifier;
/* Add the property actually storing the data to the modifier's group. */
IDProperty *prop = property_type.create_prop(socket, new_prop_name);
IDP_AddToGroup(settings_prop_group, prop);
/* Make the group in the ui container group to hold the property's UI settings. */
IDProperty *prop_ui_group;
{
IDPropertyTemplate idprop = {0};
prop_ui_group = IDP_New(IDP_GROUP, &idprop, new_prop_name);
IDP_AddToGroup(ui_container, prop_ui_group);
}
/* Create the properties for the socket's UI settings. */
if (property_type.create_min_ui_prop != nullptr) {
IDP_AddToGroup(prop_ui_group, property_type.create_min_ui_prop(socket, "min"));
IDP_AddToGroup(prop_ui_group, property_type.create_min_ui_prop(socket, "soft_min"));
}
if (property_type.create_max_ui_prop != nullptr) {
IDP_AddToGroup(prop_ui_group, property_type.create_max_ui_prop(socket, "max"));
IDP_AddToGroup(prop_ui_group, property_type.create_max_ui_prop(socket, "soft_max"));
}
if (property_type.create_default_ui_prop != nullptr) {
IDP_AddToGroup(prop_ui_group, property_type.create_default_ui_prop(socket, "default"));
}
if (property_type.rna_subtype_get != nullptr) {
const char *subtype_identifier = nullptr;
RNA_enum_identifier(rna_enum_property_subtype_items,
property_type.rna_subtype_get(socket),
&subtype_identifier);
if (subtype_identifier != nullptr) {
IDPropertyTemplate idprop = {0};
idprop.string.str = subtype_identifier;
idprop.string.len = BLI_strnlen(subtype_identifier, MAX_NAME) + 1;
IDP_AddToGroup(prop_ui_group, IDP_New(IDP_STRING, &idprop, "subtype"));
}
}
return prop;
}
static const SocketPropertyType *get_socket_property_type(const bNodeSocket &bsocket)
{
switch (bsocket.type) {
case SOCK_FLOAT: {
static const SocketPropertyType float_type = {
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueFloat *value = (bNodeSocketValueFloat *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.f = value->value;
return IDP_New(IDP_FLOAT, &idprop, name);
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueFloat *value = (bNodeSocketValueFloat *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.d = value->min;
return IDP_New(IDP_DOUBLE, &idprop, name);
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueFloat *value = (bNodeSocketValueFloat *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.d = value->max;
return IDP_New(IDP_DOUBLE, &idprop, name);
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueFloat *value = (bNodeSocketValueFloat *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.d = value->value;
return IDP_New(IDP_DOUBLE, &idprop, name);
},
[](const bNodeSocket &socket) {
return (PropertyType)((bNodeSocketValueFloat *)socket.default_value)->subtype;
},
[](const IDProperty &property) { return property.type == IDP_FLOAT; },
[](const IDProperty &property, void *r_value) {
*(float *)r_value = IDP_Float(&property);
},
};
return &float_type;
}
case SOCK_INT: {
static const SocketPropertyType int_type = {
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueInt *value = (bNodeSocketValueInt *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.i = value->value;
return IDP_New(IDP_INT, &idprop, name);
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueInt *value = (bNodeSocketValueInt *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.i = value->min;
return IDP_New(IDP_INT, &idprop, name);
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueInt *value = (bNodeSocketValueInt *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.i = value->max;
return IDP_New(IDP_INT, &idprop, name);
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueInt *value = (bNodeSocketValueInt *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.i = value->value;
return IDP_New(IDP_INT, &idprop, name);
},
[](const bNodeSocket &socket) {
return (PropertyType)((bNodeSocketValueInt *)socket.default_value)->subtype;
},
[](const IDProperty &property) { return property.type == IDP_INT; },
[](const IDProperty &property, void *r_value) { *(int *)r_value = IDP_Int(&property); },
};
return &int_type;
}
case SOCK_VECTOR: {
static const SocketPropertyType vector_type = {
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueVector *value = (bNodeSocketValueVector *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.array.len = 3;
idprop.array.type = IDP_FLOAT;
IDProperty *property = IDP_New(IDP_ARRAY, &idprop, name);
copy_v3_v3((float *)IDP_Array(property), value->value);
return property;
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueVector *value = (bNodeSocketValueVector *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.d = value->min;
return IDP_New(IDP_DOUBLE, &idprop, name);
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueVector *value = (bNodeSocketValueVector *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.d = value->max;
return IDP_New(IDP_DOUBLE, &idprop, name);
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueVector *value = (bNodeSocketValueVector *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.array.len = 3;
idprop.array.type = IDP_FLOAT;
IDProperty *property = IDP_New(IDP_ARRAY, &idprop, name);
copy_v3_v3((float *)IDP_Array(property), value->value);
return property;
},
[](const bNodeSocket &socket) {
return (PropertyType)((bNodeSocketValueVector *)socket.default_value)->subtype;
},
[](const IDProperty &property) {
return property.type == IDP_ARRAY && property.subtype == IDP_FLOAT &&
property.len == 3;
},
[](const IDProperty &property, void *r_value) {
copy_v3_v3((float *)r_value, (const float *)IDP_Array(&property));
},
};
return &vector_type;
}
case SOCK_BOOLEAN: {
static const SocketPropertyType boolean_type = {
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueBoolean *value = (bNodeSocketValueBoolean *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.i = value->value != 0;
return IDP_New(IDP_INT, &idprop, name);
},
[](const bNodeSocket &UNUSED(socket), const char *name) {
IDPropertyTemplate idprop = {0};
idprop.i = 0;
return IDP_New(IDP_INT, &idprop, name);
},
[](const bNodeSocket &UNUSED(socket), const char *name) {
IDPropertyTemplate idprop = {0};
idprop.i = 1;
return IDP_New(IDP_INT, &idprop, name);
},
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueBoolean *value = (bNodeSocketValueBoolean *)socket.default_value;
IDPropertyTemplate idprop = {0};
idprop.i = value->value != 0;
return IDP_New(IDP_INT, &idprop, name);
},
nullptr,
[](const IDProperty &property) { return property.type == IDP_INT; },
[](const IDProperty &property, void *r_value) {
*(bool *)r_value = IDP_Int(&property) != 0;
},
};
return &boolean_type;
}
case SOCK_STRING: {
static const SocketPropertyType string_type = {
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueString *value = (bNodeSocketValueString *)socket.default_value;
return IDP_NewString(
value->value, name, BLI_strnlen(value->value, sizeof(value->value)) + 1);
},
nullptr,
nullptr,
[](const bNodeSocket &socket, const char *name) {
bNodeSocketValueString *value = (bNodeSocketValueString *)socket.default_value;
return IDP_NewString(
value->value, name, BLI_strnlen(value->value, sizeof(value->value)) + 1);
},
nullptr,
[](const IDProperty &property) { return property.type == IDP_STRING; },
[](const IDProperty &property, void *r_value) {
new (r_value) std::string(IDP_String(&property));
},
};
return &string_type;
}
default: {
return nullptr;
}
}
}
/**
* Rebuild the list of properties based on the sockets exposed as the modifier's node group
* inputs. If any properties correspond to the old properties by name and type, carry over
* the values.
*/
void MOD_nodes_update_interface(Object *object, NodesModifierData *nmd)
{
if (nmd->node_group == nullptr) {
return;
}
IDProperty *old_properties = nmd->settings.properties;
{
IDPropertyTemplate idprop = {0};
nmd->settings.properties = IDP_New(IDP_GROUP, &idprop, "Nodes Modifier Settings");
}
IDProperty *ui_container_group;
{
IDPropertyTemplate idprop = {0};
ui_container_group = IDP_New(IDP_GROUP, &idprop, "_RNA_UI");
IDP_AddToGroup(nmd->settings.properties, ui_container_group);
}
LISTBASE_FOREACH (bNodeSocket *, socket, &nmd->node_group->inputs) {
const SocketPropertyType *property_type = get_socket_property_type(*socket);
if (property_type == nullptr) {
continue;
}
IDProperty *new_prop = socket_add_property(
nmd->settings.properties, ui_container_group, *property_type, *socket);
if (old_properties != nullptr) {
IDProperty *old_prop = IDP_GetPropertyFromGroup(old_properties, socket->identifier);
if (old_prop != nullptr && property_type->is_correct_type(*old_prop)) {
IDP_CopyPropertyContent(new_prop, old_prop);
}
}
}
if (old_properties != nullptr) {
IDP_FreeProperty(old_properties);
}
DEG_id_tag_update(&object->id, ID_RECALC_GEOMETRY);
}
void MOD_nodes_init(Main *bmain, NodesModifierData *nmd)
{
bNodeTree *ntree = ntreeAddTree(bmain, "Geometry Nodes", ntreeType_Geometry->idname);
nmd->node_group = ntree;
ntreeAddSocketInterface(ntree, SOCK_IN, "NodeSocketGeometry", "Geometry");
ntreeAddSocketInterface(ntree, SOCK_OUT, "NodeSocketGeometry", "Geometry");
bNode *group_input_node = nodeAddStaticNode(nullptr, ntree, NODE_GROUP_INPUT);
bNode *group_output_node = nodeAddStaticNode(nullptr, ntree, NODE_GROUP_OUTPUT);
group_input_node->locx = -200 - group_input_node->width;
group_output_node->locx = 200;
group_output_node->flag |= NODE_DO_OUTPUT;
nodeAddLink(ntree,
group_output_node,
(bNodeSocket *)group_output_node->inputs.first,
group_input_node,
(bNodeSocket *)group_input_node->outputs.first);
ntreeUpdateTree(bmain, ntree);
}
static void initialize_group_input(NodesModifierData &nmd,
const bNodeSocket &socket,
const CPPType &cpp_type,
void *r_value)
{
const SocketPropertyType *property_type = get_socket_property_type(socket);
if (property_type == nullptr) {
cpp_type.copy_to_uninitialized(cpp_type.default_value(), r_value);
return;
}
if (nmd.settings.properties == nullptr) {
blender::nodes::socket_cpp_value_get(socket, r_value);
return;
}
const IDProperty *property = IDP_GetPropertyFromGroup(nmd.settings.properties,
socket.identifier);
if (property == nullptr) {
blender::nodes::socket_cpp_value_get(socket, r_value);
return;
}
if (!property_type->is_correct_type(*property)) {
blender::nodes::socket_cpp_value_get(socket, r_value);
}
property_type->init_cpp_value(*property, r_value);
}
static void fill_data_handle_map(const DerivedNodeTree &tree,
blender::bke::PersistentDataHandleMap &handle_map)
{
Set<ID *> used_ids;
findUsedIds(*tree.btree(), used_ids);
int current_handle = 0;
for (ID *id : used_ids) {
handle_map.add(current_handle, *id);
current_handle++;
}
}
/**
* Evaluate a node group to compute the output geometry.
* Currently, this uses a fairly basic and inefficient algorithm that might compute things more
* often than necessary. It's going to be replaced soon.
*/
static GeometrySet compute_geometry(const DerivedNodeTree &tree,
Span<const DOutputSocket *> group_input_sockets,
const DInputSocket &socket_to_compute,
GeometrySet input_geometry_set,
NodesModifierData *nmd,
const ModifierEvalContext *ctx)
{
blender::ResourceCollector resources;
blender::LinearAllocator<> &allocator = resources.linear_allocator();
blender::nodes::MultiFunctionByNode mf_by_node = get_multi_function_per_node(tree, resources);
Map<const DOutputSocket *, GMutablePointer> group_inputs;
if (group_input_sockets.size() > 0) {
Span<const DOutputSocket *> remaining_input_sockets = group_input_sockets;
/* If the group expects a geometry as first input, use the geometry that has been passed to
* modifier. */
const DOutputSocket *first_input_socket = group_input_sockets[0];
if (first_input_socket->bsocket()->type == SOCK_GEOMETRY) {
GeometrySet *geometry_set_in = allocator.construct<GeometrySet>(
std::move(input_geometry_set));
group_inputs.add_new(first_input_socket, geometry_set_in);
remaining_input_sockets = remaining_input_sockets.drop_front(1);
}
/* Initialize remaining group inputs. */
for (const DOutputSocket *socket : remaining_input_sockets) {
const CPPType &cpp_type = *blender::nodes::socket_cpp_type_get(*socket->typeinfo());
void *value_in = allocator.allocate(cpp_type.size(), cpp_type.alignment());
initialize_group_input(*nmd, *socket->bsocket(), cpp_type, value_in);
group_inputs.add_new(socket, {cpp_type, value_in});
}
}
Vector<const DInputSocket *> group_outputs;
group_outputs.append(&socket_to_compute);
blender::bke::PersistentDataHandleMap handle_map;
fill_data_handle_map(tree, handle_map);
GeometryNodesEvaluator evaluator{
group_inputs, group_outputs, mf_by_node, handle_map, ctx->object};
Vector<GMutablePointer> results = evaluator.execute();
BLI_assert(results.size() == 1);
GMutablePointer result = results[0];
GeometrySet output_geometry = std::move(*(GeometrySet *)result.get());
return output_geometry;
}
/**
* \note This could be done in #initialize_group_input, though that would require adding the
* the object as a parameter, so it's likely better to this check as a separate step.
*/
static void check_property_socket_sync(const Object *ob, ModifierData *md)
{
NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
int i = 0;
LISTBASE_FOREACH_INDEX (const bNodeSocket *, socket, &nmd->node_group->inputs, i) {
/* The first socket is the special geometry socket for the modifier object. */
if (i == 0 && socket->type == SOCK_GEOMETRY) {
continue;
}
IDProperty *property = IDP_GetPropertyFromGroup(nmd->settings.properties, socket->identifier);
if (property == nullptr) {
if (socket->type == SOCK_STRING) {
BKE_modifier_set_error(ob, md, "String socket can not be exposed in the modifier");
}
else if (socket->type == SOCK_OBJECT) {
BKE_modifier_set_error(ob, md, "Object socket can not be exposed in the modifier");
}
else if (socket->type == SOCK_GEOMETRY) {
BKE_modifier_set_error(ob, md, "Node group can only have one geometry input");
}
else {
BKE_modifier_set_error(ob, md, "Missing property for input socket \"%s\"", socket->name);
}
continue;
}
const SocketPropertyType *property_type = get_socket_property_type(*socket);
if (!property_type->is_correct_type(*property)) {
BKE_modifier_set_error(
ob, md, "Property type does not match input socket \"(%s)\"", socket->name);
continue;
}
}
bool has_geometry_output = false;
LISTBASE_FOREACH (const bNodeSocket *, socket, &nmd->node_group->outputs) {
if (socket->type == SOCK_GEOMETRY) {
has_geometry_output = true;
}
}
if (!has_geometry_output) {
BKE_modifier_set_error(ob, md, "Node group must have a geometry output");
}
}
static void modifyGeometry(ModifierData *md,
const ModifierEvalContext *ctx,
GeometrySet &geometry_set)
{
NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
if (nmd->node_group == nullptr) {
return;
}
check_property_socket_sync(ctx->object, md);
blender::nodes::NodeTreeRefMap tree_refs;
DerivedNodeTree tree{nmd->node_group, tree_refs};
if (tree.has_link_cycles()) {
BKE_modifier_set_error(ctx->object, md, "Node group has cycles");
return;
}
Span<const DNode *> input_nodes = tree.nodes_by_type("NodeGroupInput");
Span<const DNode *> output_nodes = tree.nodes_by_type("NodeGroupOutput");
if (input_nodes.size() > 1) {
return;
}
if (output_nodes.size() != 1) {
return;
}
Span<const DOutputSocket *> group_inputs = (input_nodes.size() == 1) ?
input_nodes[0]->outputs().drop_back(1) :
Span<const DOutputSocket *>{};
Span<const DInputSocket *> group_outputs = output_nodes[0]->inputs().drop_back(1);
if (group_outputs.size() == 0) {
return;
}
const DInputSocket *group_output = group_outputs[0];
if (group_output->idname() != "NodeSocketGeometry") {
return;
}
geometry_set = compute_geometry(
tree, group_inputs, *group_outputs[0], std::move(geometry_set), nmd, ctx);
}
static Mesh *modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *mesh)
{
GeometrySet geometry_set = GeometrySet::create_with_mesh(mesh, GeometryOwnershipType::Editable);
geometry_set.get_component_for_write<MeshComponent>().copy_vertex_group_names_from_object(
*ctx->object);
modifyGeometry(md, ctx, geometry_set);
Mesh *new_mesh = geometry_set.get_component_for_write<MeshComponent>().release();
if (new_mesh == nullptr) {
return BKE_mesh_new_nomain(0, 0, 0, 0, 0);
}
return new_mesh;
}
static void modifyPointCloud(ModifierData *md,
const ModifierEvalContext *ctx,
GeometrySet *geometry_set)
{
modifyGeometry(md, ctx, *geometry_set);
}
/* Drawing the properties manually with #uiItemR instead of #uiDefAutoButsRNA allows using
* the node socket identifier for the property names, since they are unique, but also having
* the correct label displayed in the UI. */
static void draw_property_for_socket(uiLayout *layout,
PointerRNA *settings_ptr,
const IDProperty *modifier_props,
const bNodeSocket &socket)
{
const SocketPropertyType *property_type = get_socket_property_type(socket);
if (property_type == nullptr) {
return;
}
/* The property should be created in #MOD_nodes_update_interface with the correct type. */
IDProperty *property = IDP_GetPropertyFromGroup(modifier_props, socket.identifier);
/* IDProperties can be removed with python, so there could be a situation where
* there isn't a property for a socket or it doesn't have the correct type. */
if (property != nullptr && property_type->is_correct_type(*property)) {
char rna_path[128];
BLI_snprintf(rna_path, ARRAY_SIZE(rna_path), "[\"%s\"]", socket.identifier);
uiItemR(layout, settings_ptr, rna_path, 0, socket.name, ICON_NONE);
}
}
static void panel_draw(const bContext *C, Panel *panel)
{
uiLayout *layout = panel->layout;
PointerRNA *ptr = modifier_panel_get_property_pointers(panel, nullptr);
NodesModifierData *nmd = static_cast<NodesModifierData *>(ptr->data);
uiLayoutSetPropSep(layout, true);
/* This should be removed, but animation currently doesn't work with the IDProperties. */
uiLayoutSetPropDecorate(layout, false);
uiTemplateID(layout,
C,
ptr,
"node_group",
"node.new_geometry_node_group_assign",
nullptr,
nullptr,
0,
false,
nullptr);
if (nmd->node_group != nullptr && nmd->settings.properties != nullptr) {
PointerRNA settings_ptr;
RNA_pointer_create(ptr->owner_id, &RNA_NodesModifierSettings, &nmd->settings, &settings_ptr);
LISTBASE_FOREACH (bNodeSocket *, socket, &nmd->node_group->inputs) {
draw_property_for_socket(layout, &settings_ptr, nmd->settings.properties, *socket);
}
}
modifier_panel_end(layout, ptr);
}
static void panelRegister(ARegionType *region_type)
{
modifier_panel_register(region_type, eModifierType_Nodes, panel_draw);
}
static void blendWrite(BlendWriter *writer, const ModifierData *md)
{
const NodesModifierData *nmd = reinterpret_cast<const NodesModifierData *>(md);
if (nmd->settings.properties != nullptr) {
/* Note that the property settings are based on the socket type info
* and don't necessarily need to be written, but we can't just free them. */
IDP_BlendWrite(writer, nmd->settings.properties);
}
}
static void blendRead(BlendDataReader *reader, ModifierData *md)
{
NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
BLO_read_data_address(reader, &nmd->settings.properties);
IDP_BlendDataRead(reader, &nmd->settings.properties);
}
static void copyData(const ModifierData *md, ModifierData *target, const int flag)
{
const NodesModifierData *nmd = reinterpret_cast<const NodesModifierData *>(md);
NodesModifierData *tnmd = reinterpret_cast<NodesModifierData *>(target);
BKE_modifier_copydata_generic(md, target, flag);
if (nmd->settings.properties != nullptr) {
tnmd->settings.properties = IDP_CopyProperty_ex(nmd->settings.properties, flag);
}
}
static void freeData(ModifierData *md)
{
NodesModifierData *nmd = reinterpret_cast<NodesModifierData *>(md);
if (nmd->settings.properties != nullptr) {
IDP_FreeProperty_ex(nmd->settings.properties, false);
nmd->settings.properties = nullptr;
}
}
ModifierTypeInfo modifierType_Nodes = {
/* name */ "GeometryNodes",
/* structName */ "NodesModifierData",
/* structSize */ sizeof(NodesModifierData),
/* srna */ &RNA_NodesModifier,
/* type */ eModifierTypeType_Constructive,
/* flags */
static_cast<ModifierTypeFlag>(eModifierTypeFlag_AcceptsMesh |
eModifierTypeFlag_SupportsEditmode |
eModifierTypeFlag_EnableInEditmode),
/* icon */ ICON_NODETREE,
/* copyData */ copyData,
/* deformVerts */ nullptr,
/* deformMatrices */ nullptr,
/* deformVertsEM */ nullptr,
/* deformMatricesEM */ nullptr,
/* modifyMesh */ modifyMesh,
/* modifyHair */ nullptr,
/* modifyPointCloud */ modifyPointCloud,
/* modifyVolume */ nullptr,
/* initData */ initData,
/* requiredDataMask */ nullptr,
/* freeData */ freeData,
/* isDisabled */ isDisabled,
/* updateDepsgraph */ updateDepsgraph,
/* dependsOnTime */ nullptr,
/* dependsOnNormals */ nullptr,
/* foreachIDLink */ foreachIDLink,
/* foreachTexLink */ nullptr,
/* freeRuntimeData */ nullptr,
/* panelRegister */ panelRegister,
/* blendWrite */ blendWrite,
/* blendRead */ blendRead,
};
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