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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <atomic>
#include "BKE_curves.hh"
#include "UI_interface.h"
#include "UI_resources.h"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_set_curve_handles_cc {
NODE_STORAGE_FUNCS(NodeGeometrySetCurveHandlePositions)
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>(N_("Curve")).supported_type(GEO_COMPONENT_TYPE_CURVE);
b.add_input<decl::Bool>(N_("Selection")).default_value(true).hide_value().supports_field();
b.add_input<decl::Vector>(N_("Position")).implicit_field([](const bNode &node, void *r_value) {
const StringRef side = node_storage(node).mode == GEO_NODE_CURVE_HANDLE_LEFT ? "handle_left" :
"handle_right";
new (r_value) ValueOrField<float3>(bke::AttributeFieldInput::Create<float3>(side));
});
b.add_input<decl::Vector>(N_("Offset")).default_value(float3(0.0f, 0.0f, 0.0f)).supports_field();
b.add_output<decl::Geometry>(N_("Curve"));
}
static void node_layout(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
{
uiItemR(layout, ptr, "mode", UI_ITEM_R_EXPAND, nullptr, ICON_NONE);
}
static void node_init(bNodeTree * /*tree*/, bNode *node)
{
NodeGeometrySetCurveHandlePositions *data = MEM_cnew<NodeGeometrySetCurveHandlePositions>(
__func__);
data->mode = GEO_NODE_CURVE_HANDLE_LEFT;
node->storage = data;
}
static void update_handle_types_for_movement(int8_t &type, int8_t &other)
{
switch (type) {
case BEZIER_HANDLE_FREE:
break;
case BEZIER_HANDLE_AUTO:
/* Converting auto handles to aligned handled instead of free handles is
* arbitrary, but expected and "standard" based on behavior in edit mode. */
if (other == BEZIER_HANDLE_AUTO) {
/* Convert pairs of auto handles to aligned handles when moving one side. */
type = BEZIER_HANDLE_ALIGN;
other = BEZIER_HANDLE_ALIGN;
}
else {
/* If the other handle isn't automatic, just make the handle free. */
type = BEZIER_HANDLE_FREE;
}
break;
case BEZIER_HANDLE_VECTOR:
type = BEZIER_HANDLE_FREE;
break;
case BEZIER_HANDLE_ALIGN:
/* The handle can stay aligned if the other handle is also aligned (in which case the other
* handle should be updated to be consistent). But otherwise the handle must be made free to
* avoid conflicting with its "aligned" type. */
if (other != BEZIER_HANDLE_ALIGN) {
type = BEZIER_HANDLE_FREE;
}
break;
}
}
static void set_position_in_component(bke::CurvesGeometry &curves,
const GeometryNodeCurveHandleMode mode,
const Field<bool> &selection_field,
const Field<float3> &position_field,
const Field<float3> &offset_field)
{
if (curves.points_num() == 0) {
return;
}
bke::CurvesFieldContext field_context{curves, ATTR_DOMAIN_POINT};
fn::FieldEvaluator evaluator{field_context, curves.points_num()};
evaluator.set_selection(selection_field);
evaluator.add(position_field);
evaluator.add(offset_field);
evaluator.evaluate();
const IndexMask selection = evaluator.get_evaluated_selection_as_mask();
const VArray<float3> new_positions = evaluator.get_evaluated<float3>(0);
const VArray<float3> new_offsets = evaluator.get_evaluated<float3>(1);
Span<float3> positions = curves.positions();
const bool use_left = mode == GEO_NODE_CURVE_HANDLE_LEFT;
MutableSpan<int8_t> handle_types = use_left ? curves.handle_types_left_for_write() :
curves.handle_types_right_for_write();
MutableSpan<int8_t> handle_types_other = use_left ? curves.handle_types_right_for_write() :
curves.handle_types_left_for_write();
MutableSpan<float3> handle_positions = use_left ? curves.handle_positions_left_for_write() :
curves.handle_positions_right_for_write();
MutableSpan<float3> handle_positions_other = use_left ?
curves.handle_positions_right_for_write() :
curves.handle_positions_left_for_write();
threading::parallel_for(selection.index_range(), 2048, [&](IndexRange range) {
for (const int i : selection.slice(range)) {
update_handle_types_for_movement(handle_types[i], handle_types_other[i]);
}
});
threading::parallel_for(selection.index_range(), 2048, [&](IndexRange range) {
for (const int i : selection.slice(range)) {
bke::curves::bezier::set_handle_position(positions[i],
HandleType(handle_types[i]),
HandleType(handle_types_other[i]),
new_positions[i] + new_offsets[i],
handle_positions[i],
handle_positions_other[i]);
}
});
curves.calculate_bezier_auto_handles();
curves.tag_positions_changed();
}
static void node_geo_exec(GeoNodeExecParams params)
{
const NodeGeometrySetCurveHandlePositions &storage = node_storage(params.node());
const GeometryNodeCurveHandleMode mode = (GeometryNodeCurveHandleMode)storage.mode;
GeometrySet geometry_set = params.extract_input<GeometrySet>("Curve");
Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
Field<float3> position_field = params.extract_input<Field<float3>>("Position");
Field<float3> offset_field = params.extract_input<Field<float3>>("Offset");
std::atomic<bool> has_curves = false;
std::atomic<bool> has_bezier = false;
geometry_set.modify_geometry_sets([&](GeometrySet &geometry_set) {
if (Curves *curves_id = geometry_set.get_curves_for_write()) {
bke::CurvesGeometry &curves = bke::CurvesGeometry::wrap(curves_id->geometry);
has_curves = true;
const AttributeAccessor attributes = curves.attributes();
if (!attributes.contains("handle_left") || !attributes.contains("handle_right")) {
return;
}
has_bezier = true;
set_position_in_component(curves, mode, selection_field, position_field, offset_field);
}
});
if (has_curves && !has_bezier) {
params.error_message_add(NodeWarningType::Info, TIP_("Input curves do not have Bezier type"));
}
params.set_output("Curve", std::move(geometry_set));
}
} // namespace blender::nodes::node_geo_set_curve_handles_cc
void register_node_type_geo_set_curve_handles()
{
namespace file_ns = blender::nodes::node_geo_set_curve_handles_cc;
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_SET_CURVE_HANDLES, "Set Handle Positions", NODE_CLASS_GEOMETRY);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
ntype.minwidth = 100.0f;
node_type_init(&ntype, file_ns::node_init);
node_type_storage(&ntype,
"NodeGeometrySetCurveHandlePositions",
node_free_standard_storage,
node_copy_standard_storage);
ntype.draw_buttons = file_ns::node_layout;
nodeRegisterType(&ntype);
}
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