blender
/
blender
129
398
Fork 572
Code Issues 6.2k Pull Requests 746 Projects 19 Wiki Activity

Geometry Nodes: Relative Handle Position Mode 

Add a boolean option to have the Curve Handle Position input node return the
position of the handle relative to each point position.

Differential Revision: https://developer.blender.org/D12947
This commit is contained in:
Johnny Matthews 2022-01-23 12:29:37 -06:00
parent 807c58aae4
commit 38c7378949
1 changed files with 78 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

80
source/blender/nodes/geometry/nodes/node_geo_input_curve_handles.cc
View File

@ -14,20 +14,96 @@
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "BKE_spline.hh"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_input_curve_handles_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Bool>(N_("Relative")).default_value(false).supports_field();
b.add_output<decl::Vector>(N_("Left")).field_source();
b.add_output<decl::Vector>(N_("Right")).field_source();
}
class HandlePositionFieldInput final : public GeometryFieldInput {
Field<bool> relative_;
bool left_;
public:
HandlePositionFieldInput(Field<bool> relative, bool left)
: GeometryFieldInput(CPPType::get<float3>(), "Handle"), relative_(relative), left_(left)
{
}
GVArray get_varray_for_context(const GeometryComponent &component,
const AttributeDomain domain,
IndexMask mask) const final
{
if (component.type() != GEO_COMPONENT_TYPE_CURVE) {
return {};
}
GeometryComponentFieldContext field_context{component, ATTR_DOMAIN_POINT};
fn::FieldEvaluator evaluator(field_context, &mask);
evaluator.add(relative_);
evaluator.evaluate();
const VArray<bool> &relative = evaluator.get_evaluated<bool>(0);
VArray<float3> positions = component.attribute_get_for_read<float3>(
"position", ATTR_DOMAIN_POINT, {0, 0, 0});
StringRef side = left_ ? "handle_left" : "handle_right";
VArray<float3> handles = component.attribute_get_for_read<float3>(
side, ATTR_DOMAIN_POINT, {0, 0, 0});
if (relative.is_single()) {
if (relative.get_internal_single()) {
Array<float3> output(positions.size());
for (const int i : positions.index_range()) {
output[i] = handles[i] - positions[i];
}
return component.attribute_try_adapt_domain<float3>(
VArray<float3>::ForContainer(std::move(output)), ATTR_DOMAIN_POINT, domain);
}
return component.attribute_try_adapt_domain<float3>(handles, ATTR_DOMAIN_POINT, domain);
}
Array<float3> output(positions.size());
for (const int i : positions.index_range()) {
if (relative[i]) {
output[i] = handles[i] - positions[i];
}
else {
output[i] = handles[i];
}
}
return component.attribute_try_adapt_domain<float3>(
VArray<float3>::ForContainer(std::move(output)), ATTR_DOMAIN_POINT, domain);
}
uint64_t hash() const override
{
return get_default_hash_2(relative_, left_);
}
bool is_equal_to(const fn::FieldNode &other) const override
{
if (const HandlePositionFieldInput *other_handle =
dynamic_cast<const HandlePositionFieldInput *>(&other)) {
return relative_ == other_handle->relative_ && left_ == other_handle->left_;
}
return false;
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
Field<float3> left_field = AttributeFieldInput::Create<float3>("handle_left");
Field<float3> right_field = AttributeFieldInput::Create<float3>("handle_right");
Field<bool> relative = params.extract_input<Field<bool>>("Relative");
Field<float3> left_field{std::make_shared<HandlePositionFieldInput>(relative, true)};
Field<float3> right_field{std::make_shared<HandlePositionFieldInput>(relative, false)};
params.set_output("Left", std::move(left_field));
params.set_output("Right", std::move(right_field));
}