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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 "node_geometry_util.hh"
#include "UI_interface.h"
#include "UI_resources.h"
#include "BKE_attribute_math.hh"
#include "BLI_task.hh"
namespace blender::nodes::node_geo_field_at_index_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Int>(N_("Index")).min(0).supports_field();
b.add_input<decl::Float>(N_("Value"), "Value_Float").supports_field();
b.add_input<decl::Int>(N_("Value"), "Value_Int").supports_field();
b.add_input<decl::Vector>(N_("Value"), "Value_Vector").supports_field();
b.add_input<decl::Color>(N_("Value"), "Value_Color").supports_field();
b.add_input<decl::Bool>(N_("Value"), "Value_Bool").supports_field();
b.add_output<decl::Float>(N_("Value"), "Value_Float").field_source();
b.add_output<decl::Int>(N_("Value"), "Value_Int").field_source();
b.add_output<decl::Vector>(N_("Value"), "Value_Vector").field_source();
b.add_output<decl::Color>(N_("Value"), "Value_Color").field_source();
b.add_output<decl::Bool>(N_("Value"), "Value_Bool").field_source();
}
static void node_layout(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
{
uiItemR(layout, ptr, "data_type", 0, "", ICON_NONE);
uiItemR(layout, ptr, "domain", 0, "", ICON_NONE);
}
static void node_init(bNodeTree *UNUSED(tree), bNode *node)
{
node->custom1 = ATTR_DOMAIN_POINT;
node->custom2 = CD_PROP_FLOAT;
}
static void node_update(bNodeTree *ntree, bNode *node)
{
const CustomDataType data_type = static_cast<CustomDataType>(node->custom2);
bNodeSocket *sock_index = static_cast<bNodeSocket *>(node->inputs.first);
bNodeSocket *sock_in_float = sock_index->next;
bNodeSocket *sock_in_int = sock_in_float->next;
bNodeSocket *sock_in_vector = sock_in_int->next;
bNodeSocket *sock_in_color = sock_in_vector->next;
bNodeSocket *sock_in_bool = sock_in_color->next;
bNodeSocket *sock_out_float = static_cast<bNodeSocket *>(node->outputs.first);
bNodeSocket *sock_out_int = sock_out_float->next;
bNodeSocket *sock_out_vector = sock_out_int->next;
bNodeSocket *sock_out_color = sock_out_vector->next;
bNodeSocket *sock_out_bool = sock_out_color->next;
nodeSetSocketAvailability(ntree, sock_in_float, data_type == CD_PROP_FLOAT);
nodeSetSocketAvailability(ntree, sock_in_int, data_type == CD_PROP_INT32);
nodeSetSocketAvailability(ntree, sock_in_vector, data_type == CD_PROP_FLOAT3);
nodeSetSocketAvailability(ntree, sock_in_color, data_type == CD_PROP_COLOR);
nodeSetSocketAvailability(ntree, sock_in_bool, data_type == CD_PROP_BOOL);
nodeSetSocketAvailability(ntree, sock_out_float, data_type == CD_PROP_FLOAT);
nodeSetSocketAvailability(ntree, sock_out_int, data_type == CD_PROP_INT32);
nodeSetSocketAvailability(ntree, sock_out_vector, data_type == CD_PROP_FLOAT3);
nodeSetSocketAvailability(ntree, sock_out_color, data_type == CD_PROP_COLOR);
nodeSetSocketAvailability(ntree, sock_out_bool, data_type == CD_PROP_BOOL);
}
class FieldAtIndex final : public GeometryFieldInput {
private:
Field<int> index_field_;
GField value_field_;
AttributeDomain value_field_domain_;
public:
FieldAtIndex(Field<int> index_field, GField value_field, AttributeDomain value_field_domain)
: GeometryFieldInput(value_field.cpp_type(), "Field at Index"),
index_field_(std::move(index_field)),
value_field_(std::move(value_field)),
value_field_domain_(value_field_domain)
{
}
GVArray get_varray_for_context(const GeometryComponent &component,
const AttributeDomain domain,
IndexMask mask) const final
{
const GeometryComponentFieldContext value_field_context{component, value_field_domain_};
FieldEvaluator value_evaluator{value_field_context,
component.attribute_domain_size(value_field_domain_)};
value_evaluator.add(value_field_);
value_evaluator.evaluate();
const GVArray &values = value_evaluator.get_evaluated(0);
const GeometryComponentFieldContext index_field_context{component, domain};
FieldEvaluator index_evaluator{index_field_context, &mask};
index_evaluator.add(index_field_);
index_evaluator.evaluate();
const VArray<int> &indices = index_evaluator.get_evaluated<int>(0);
GVArray output_array;
attribute_math::convert_to_static_type(*type_, [&](auto dummy) {
using T = decltype(dummy);
Array<T> dst_array(mask.min_array_size());
VArray<T> src_values = values.typed<T>();
threading::parallel_for(mask.index_range(), 1024, [&](const IndexRange range) {
for (const int i : mask.slice(range)) {
const int index = indices[i];
if (index >= 0 && index < src_values.size()) {
dst_array[i] = src_values[index];
}
else {
dst_array[i] = {};
}
}
});
output_array = VArray<T>::ForContainer(std::move(dst_array));
});
return output_array;
}
};
static StringRefNull identifier_suffix(CustomDataType data_type)
{
switch (data_type) {
case CD_PROP_BOOL:
return "Bool";
case CD_PROP_FLOAT:
return "Float";
case CD_PROP_INT32:
return "Int";
case CD_PROP_COLOR:
return "Color";
case CD_PROP_FLOAT3:
return "Vector";
default:
BLI_assert_unreachable();
return "";
}
}
static void node_geo_exec(GeoNodeExecParams params)
{
const bNode &node = params.node();
const AttributeDomain domain = static_cast<AttributeDomain>(node.custom1);
const CustomDataType data_type = static_cast<CustomDataType>(node.custom2);
Field<int> index_field = params.extract_input<Field<int>>("Index");
attribute_math::convert_to_static_type(data_type, [&](auto dummy) {
using T = decltype(dummy);
static const std::string identifier = "Value_" + identifier_suffix(data_type);
Field<T> value_field = params.extract_input<Field<T>>(identifier);
Field<T> output_field{
std::make_shared<FieldAtIndex>(std::move(index_field), std::move(value_field), domain)};
params.set_output(identifier, std::move(output_field));
});
}
} // namespace blender::nodes::node_geo_field_at_index_cc
void register_node_type_geo_field_at_index()
{
namespace file_ns = blender::nodes::node_geo_field_at_index_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_FIELD_AT_INDEX, "Field at Index", NODE_CLASS_CONVERTER);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
ntype.draw_buttons = file_ns::node_layout;
ntype.initfunc = file_ns::node_init;
ntype.updatefunc = file_ns::node_update;
nodeRegisterType(&ntype);
}
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