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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 "BKE_spline.hh"
#include "UI_interface.h"
#include "UI_resources.h"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_curve_set_handles_cc {
NODE_STORAGE_FUNCS(NodeGeometryCurveSetHandles)
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_output<decl::Geometry>(N_("Curve"));
}
static void node_layout(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
{
uiItemR(layout, ptr, "mode", UI_ITEM_R_EXPAND, nullptr, ICON_NONE);
uiItemR(layout, ptr, "handle_type", 0, "", ICON_NONE);
}
static void node_init(bNodeTree *UNUSED(tree), bNode *node)
{
NodeGeometryCurveSetHandles *data = MEM_cnew<NodeGeometryCurveSetHandles>(__func__);
data->handle_type = GEO_NODE_CURVE_HANDLE_AUTO;
data->mode = GEO_NODE_CURVE_HANDLE_LEFT;
node->storage = data;
}
static BezierSpline::HandleType handle_type_from_input_type(GeometryNodeCurveHandleType type)
{
switch (type) {
case GEO_NODE_CURVE_HANDLE_AUTO:
return BezierSpline::HandleType::Auto;
case GEO_NODE_CURVE_HANDLE_ALIGN:
return BezierSpline::HandleType::Align;
case GEO_NODE_CURVE_HANDLE_FREE:
return BezierSpline::HandleType::Free;
case GEO_NODE_CURVE_HANDLE_VECTOR:
return BezierSpline::HandleType::Vector;
}
BLI_assert_unreachable();
return BezierSpline::HandleType::Auto;
}
static void node_geo_exec(GeoNodeExecParams params)
{
const NodeGeometryCurveSetHandles &storage = node_storage(params.node());
const GeometryNodeCurveHandleType type = (GeometryNodeCurveHandleType)storage.handle_type;
const GeometryNodeCurveHandleMode mode = (GeometryNodeCurveHandleMode)storage.mode;
GeometrySet geometry_set = params.extract_input<GeometrySet>("Curve");
Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
bool has_bezier_spline = false;
geometry_set.modify_geometry_sets([&](GeometrySet &geometry_set) {
if (!geometry_set.has_curve()) {
return;
}
/* Retrieve data for write access so we can avoid new allocations for the handles data. */
CurveComponent &curve_component = geometry_set.get_component_for_write<CurveComponent>();
CurveEval &curve = *curve_component.get_for_write();
MutableSpan<SplinePtr> splines = curve.splines();
GeometryComponentFieldContext field_context{curve_component, ATTR_DOMAIN_POINT};
const int domain_size = curve_component.attribute_domain_size(ATTR_DOMAIN_POINT);
fn::FieldEvaluator selection_evaluator{field_context, domain_size};
selection_evaluator.add(selection_field);
selection_evaluator.evaluate();
const VArray<bool> &selection = selection_evaluator.get_evaluated<bool>(0);
const BezierSpline::HandleType new_handle_type = handle_type_from_input_type(type);
int point_index = 0;
for (SplinePtr &spline : splines) {
if (spline->type() != Spline::Type::Bezier) {
point_index += spline->positions().size();
continue;
}
has_bezier_spline = true;
BezierSpline &bezier_spline = static_cast<BezierSpline &>(*spline);
if (ELEM(new_handle_type, BezierSpline::HandleType::Free, BezierSpline::HandleType::Align)) {
/* In this case the automatically calculated handle types need to be "baked", because
* they're possibly changing from a type that is calculated automatically to a type that
* is positioned manually. */
bezier_spline.ensure_auto_handles();
}
for (int i_point : IndexRange(bezier_spline.size())) {
if (selection[point_index]) {
if (mode & GEO_NODE_CURVE_HANDLE_LEFT) {
bezier_spline.handle_types_left()[i_point] = new_handle_type;
}
if (mode & GEO_NODE_CURVE_HANDLE_RIGHT) {
bezier_spline.handle_types_right()[i_point] = new_handle_type;
}
}
point_index++;
}
bezier_spline.mark_cache_invalid();
}
});
if (!has_bezier_spline) {
params.error_message_add(NodeWarningType::Info, TIP_("No Bezier splines in input curve"));
}
params.set_output("Curve", std::move(geometry_set));
}
} // namespace blender::nodes::node_geo_curve_set_handles_cc
void register_node_type_geo_curve_set_handles()
{
namespace file_ns = blender::nodes::node_geo_curve_set_handles_cc;
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_CURVE_SET_HANDLES, "Set Handle Type", NODE_CLASS_GEOMETRY, 0);
ntype.declare = file_ns::node_declare;
ntype.geometry_node_execute = file_ns::node_geo_exec;
node_type_init(&ntype, file_ns::node_init);
node_type_storage(&ntype,
"NodeGeometryCurveSetHandles",
node_free_standard_storage,
node_copy_standard_storage);
ntype.draw_buttons = file_ns::node_layout;
nodeRegisterType(&ntype);
}
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