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tornavis/source/blender/blenkernel/intern/curves_geometry.cc

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/* SPDX-FileCopyrightText: 2023 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bke
*/
#include <mutex>
#include <utility>
#include "MEM_guardedalloc.h"
#include "BLI_array_utils.hh"
#include "BLI_bounds.hh"
#include "BLI_index_mask.hh"
#include "BLI_length_parameterize.hh"
#include "BLI_math_matrix.hh"
#include "BLI_math_rotation_legacy.hh"
#include "BLI_multi_value_map.hh"
#include "BLI_task.hh"
#include "BLO_read_write.hh"
#include "DNA_curves_types.h"
#include "BKE_attribute_math.hh"
#include "BKE_curves.hh"
#include "BKE_curves_utils.hh"
#include "BKE_customdata.hh"
#include "BKE_deform.h"
namespace blender::bke {
static const std::string ATTR_POSITION = "position";
static const std::string ATTR_RADIUS = "radius";
static const std::string ATTR_TILT = "tilt";
static const std::string ATTR_CURVE_TYPE = "curve_type";
static const std::string ATTR_CYCLIC = "cyclic";
static const std::string ATTR_RESOLUTION = "resolution";
static const std::string ATTR_NORMAL_MODE = "normal_mode";
static const std::string ATTR_HANDLE_TYPE_LEFT = "handle_type_left";
static const std::string ATTR_HANDLE_TYPE_RIGHT = "handle_type_right";
static const std::string ATTR_HANDLE_POSITION_LEFT = "handle_left";
static const std::string ATTR_HANDLE_POSITION_RIGHT = "handle_right";
static const std::string ATTR_NURBS_ORDER = "nurbs_order";
static const std::string ATTR_NURBS_WEIGHT = "nurbs_weight";
static const std::string ATTR_NURBS_KNOTS_MODE = "knots_mode";
static const std::string ATTR_SURFACE_UV_COORDINATE = "surface_uv_coordinate";
/* -------------------------------------------------------------------- */
/** \name Constructors/Destructor
* \{ */
CurvesGeometry::CurvesGeometry() : CurvesGeometry(0, 0) {}
CurvesGeometry::CurvesGeometry(const int point_num, const int curve_num)
{
this->point_num = point_num;
this->curve_num = curve_num;
CustomData_reset(&this->point_data);
CustomData_reset(&this->curve_data);
BLI_listbase_clear(&this->vertex_group_names);
this->attributes_for_write().add<float3>(
"position", ATTR_DOMAIN_POINT, AttributeInitConstruct());
this->runtime = MEM_new<CurvesGeometryRuntime>(__func__);
if (curve_num > 0) {
this->curve_offsets = static_cast<int *>(
MEM_malloc_arrayN(this->curve_num + 1, sizeof(int), __func__));
this->runtime->curve_offsets_sharing_info = implicit_sharing::info_for_mem_free(
this->curve_offsets);
#ifdef DEBUG
this->offsets_for_write().fill(-1);
#endif
/* Set common values for convenience. */
this->curve_offsets[0] = 0;
this->curve_offsets[this->curve_num] = this->point_num;
}
else {
this->curve_offsets = nullptr;
}
/* Fill the type counts with the default so they're in a valid state. */
this->runtime->type_counts[CURVE_TYPE_CATMULL_ROM] = curve_num;
}
/**
* \note Expects `dst` to be initialized, since the original attributes must be freed.
*/
static void copy_curves_geometry(CurvesGeometry &dst, const CurvesGeometry &src)
{
CustomData_free(&dst.point_data, dst.point_num);
CustomData_free(&dst.curve_data, dst.curve_num);
dst.point_num = src.point_num;
dst.curve_num = src.curve_num;
CustomData_copy(&src.point_data, &dst.point_data, CD_MASK_ALL, dst.point_num);
CustomData_copy(&src.curve_data, &dst.curve_data, CD_MASK_ALL, dst.curve_num);
dst.vertex_group_active_index = src.vertex_group_active_index;
BKE_defgroup_copy_list(&dst.vertex_group_names, &src.vertex_group_names);
implicit_sharing::copy_shared_pointer(src.curve_offsets,
src.runtime->curve_offsets_sharing_info,
&dst.curve_offsets,
&dst.runtime->curve_offsets_sharing_info);
dst.tag_topology_changed();
/* Though type counts are a cache, they must be copied because they are calculated eagerly. */
dst.runtime->type_counts = src.runtime->type_counts;
dst.runtime->evaluated_offsets_cache = src.runtime->evaluated_offsets_cache;
dst.runtime->nurbs_basis_cache = src.runtime->nurbs_basis_cache;
dst.runtime->evaluated_position_cache = src.runtime->evaluated_position_cache;
dst.runtime->bounds_cache = src.runtime->bounds_cache;
dst.runtime->evaluated_length_cache = src.runtime->evaluated_length_cache;
dst.runtime->evaluated_tangent_cache = src.runtime->evaluated_tangent_cache;
dst.runtime->evaluated_normal_cache = src.runtime->evaluated_normal_cache;
}
CurvesGeometry::CurvesGeometry(const CurvesGeometry &other) : CurvesGeometry()
{
copy_curves_geometry(*this, other);
}
CurvesGeometry &CurvesGeometry::operator=(const CurvesGeometry &other)
{
if (this != &other) {
copy_curves_geometry(*this, other);
}
return *this;
}
/* The source should be empty, but in a valid state so that using it further will work. */
static void move_curves_geometry(CurvesGeometry &dst, CurvesGeometry &src)
{
dst.point_num = src.point_num;
std::swap(dst.point_data, src.point_data);
CustomData_free(&src.point_data, src.point_num);
src.point_num = 0;
dst.curve_num = src.curve_num;
std::swap(dst.curve_data, src.curve_data);
CustomData_free(&src.curve_data, src.curve_num);
src.curve_num = 0;
std::swap(dst.curve_offsets, src.curve_offsets);
std::swap(dst.vertex_group_names.first, src.vertex_group_names.first);
std::swap(dst.vertex_group_names.last, src.vertex_group_names.last);
std::swap(dst.vertex_group_active_index, src.vertex_group_active_index);
std::swap(dst.runtime, src.runtime);
}
CurvesGeometry::CurvesGeometry(CurvesGeometry &&other) : CurvesGeometry()
{
move_curves_geometry(*this, other);
}
CurvesGeometry &CurvesGeometry::operator=(CurvesGeometry &&other)
{
if (this != &other) {
move_curves_geometry(*this, other);
}
return *this;
}
CurvesGeometry::~CurvesGeometry()
{
CustomData_free(&this->point_data, this->point_num);
CustomData_free(&this->curve_data, this->curve_num);
implicit_sharing::free_shared_data(&this->curve_offsets,
&this->runtime->curve_offsets_sharing_info);
BLI_freelistN(&this->vertex_group_names);
MEM_delete(this->runtime);
this->runtime = nullptr;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Accessors
* \{ */
static int domain_num(const CurvesGeometry &curves, const eAttrDomain domain)
{
return domain == ATTR_DOMAIN_POINT ? curves.points_num() : curves.curves_num();
}
static CustomData &domain_custom_data(CurvesGeometry &curves, const eAttrDomain domain)
{
return domain == ATTR_DOMAIN_POINT ? curves.point_data : curves.curve_data;
}
static const CustomData &domain_custom_data(const CurvesGeometry &curves, const eAttrDomain domain)
{
return domain == ATTR_DOMAIN_POINT ? curves.point_data : curves.curve_data;
}
template<typename T>
static VArray<T> get_varray_attribute(const CurvesGeometry &curves,
const eAttrDomain domain,
const StringRefNull name,
const T default_value)
{
const int num = domain_num(curves, domain);
const eCustomDataType type = cpp_type_to_custom_data_type(CPPType::get<T>());
const CustomData &custom_data = domain_custom_data(curves, domain);
const T *data = (const T *)CustomData_get_layer_named(&custom_data, type, name.c_str());
if (data != nullptr) {
return VArray<T>::ForSpan(Span<T>(data, num));
}
return VArray<T>::ForSingle(default_value, num);
}
template<typename T>
static Span<T> get_span_attribute(const CurvesGeometry &curves,
const eAttrDomain domain,
const StringRefNull name)
{
const int num = domain_num(curves, domain);
const CustomData &custom_data = domain_custom_data(curves, domain);
const eCustomDataType type = cpp_type_to_custom_data_type(CPPType::get<T>());
T *data = (T *)CustomData_get_layer_named(&custom_data, type, name.c_str());
if (data == nullptr) {
return {};
}
return {data, num};
}
template<typename T>
static MutableSpan<T> get_mutable_attribute(CurvesGeometry &curves,
const eAttrDomain domain,
const StringRefNull name,
const T default_value = T())
{
const int num = domain_num(curves, domain);
const eCustomDataType type = cpp_type_to_custom_data_type(CPPType::get<T>());
CustomData &custom_data = domain_custom_data(curves, domain);
T *data = (T *)CustomData_get_layer_named_for_write(&custom_data, type, name.c_str(), num);
if (data != nullptr) {
return {data, num};
}
data = (T *)CustomData_add_layer_named(&custom_data, type, CD_SET_DEFAULT, num, name.c_str());
MutableSpan<T> span = {data, num};
if (num > 0 && span.first() != default_value) {
span.fill(default_value);
}
return span;
}
VArray<int8_t> CurvesGeometry::curve_types() const
{
return get_varray_attribute<int8_t>(
*this, ATTR_DOMAIN_CURVE, ATTR_CURVE_TYPE, CURVE_TYPE_CATMULL_ROM);
}
MutableSpan<int8_t> CurvesGeometry::curve_types_for_write()
{
return get_mutable_attribute<int8_t>(*this, ATTR_DOMAIN_CURVE, ATTR_CURVE_TYPE);
}
void CurvesGeometry::fill_curve_types(const CurveType type)
{
if (type == CURVE_TYPE_CATMULL_ROM) {
/* Avoid creating the attribute for Catmull Rom which is the default when the attribute doesn't
* exist anyway. */
this->attributes_for_write().remove("curve_type");
}
else {
this->curve_types_for_write().fill(type);
}
this->runtime->type_counts.fill(0);
this->runtime->type_counts[type] = this->curves_num();
this->tag_topology_changed();
}
void CurvesGeometry::fill_curve_types(const IndexMask &selection, const CurveType type)
{
if (selection.size() == this->curves_num()) {
this->fill_curve_types(type);
return;
}
if (std::optional<int8_t> single_type = this->curve_types().get_if_single()) {
if (single_type == type) {
this->fill_curve_types(type);
return;
}
}
/* A potential performance optimization is only counting the changed indices. */
index_mask::masked_fill<int8_t>(this->curve_types_for_write(), type, selection);
this->update_curve_types();
this->tag_topology_changed();
}
std::array<int, CURVE_TYPES_NUM> calculate_type_counts(const VArray<int8_t> &types)
{
using CountsType = std::array<int, CURVE_TYPES_NUM>;
CountsType counts;
counts.fill(0);
if (types.is_single()) {
counts[types.get_internal_single()] = types.size();
return counts;
}
Span<int8_t> types_span = types.get_internal_span();
return threading::parallel_reduce(
types.index_range(),
2048,
counts,
[&](const IndexRange curves_range, const CountsType &init) {
CountsType result = init;
for (const int curve_index : curves_range) {
result[types_span[curve_index]]++;
}
return result;
},
[](const CountsType &a, const CountsType &b) {
CountsType result = a;
for (const int i : IndexRange(CURVE_TYPES_NUM)) {
result[i] += b[i];
}
return result;
});
}
void CurvesGeometry::update_curve_types()
{
this->runtime->type_counts = calculate_type_counts(this->curve_types());
}
Span<float3> CurvesGeometry::positions() const
{
return get_span_attribute<float3>(*this, ATTR_DOMAIN_POINT, ATTR_POSITION);
}
MutableSpan<float3> CurvesGeometry::positions_for_write()
{
return get_mutable_attribute<float3>(*this, ATTR_DOMAIN_POINT, ATTR_POSITION);
}
Span<int> CurvesGeometry::offsets() const
{
return {this->curve_offsets, this->curve_num + 1};
}
MutableSpan<int> CurvesGeometry::offsets_for_write()
{
if (this->curve_num == 0) {
return {};
}
implicit_sharing::make_trivial_data_mutable(
&this->curve_offsets, &this->runtime->curve_offsets_sharing_info, this->curve_num + 1);
return {this->curve_offsets, this->curve_num + 1};
}
VArray<bool> CurvesGeometry::cyclic() const
{
return get_varray_attribute<bool>(*this, ATTR_DOMAIN_CURVE, ATTR_CYCLIC, false);
}
MutableSpan<bool> CurvesGeometry::cyclic_for_write()
{
return get_mutable_attribute<bool>(*this, ATTR_DOMAIN_CURVE, ATTR_CYCLIC, false);
}
VArray<int> CurvesGeometry::resolution() const
{
return get_varray_attribute<int>(*this, ATTR_DOMAIN_CURVE, ATTR_RESOLUTION, 12);
}
MutableSpan<int> CurvesGeometry::resolution_for_write()
{
return get_mutable_attribute<int>(*this, ATTR_DOMAIN_CURVE, ATTR_RESOLUTION, 12);
}
VArray<int8_t> CurvesGeometry::normal_mode() const
{
return get_varray_attribute<int8_t>(*this, ATTR_DOMAIN_CURVE, ATTR_NORMAL_MODE, 0);
}
MutableSpan<int8_t> CurvesGeometry::normal_mode_for_write()
{
return get_mutable_attribute<int8_t>(*this, ATTR_DOMAIN_CURVE, ATTR_NORMAL_MODE);
}
VArray<float> CurvesGeometry::tilt() const
{
return get_varray_attribute<float>(*this, ATTR_DOMAIN_POINT, ATTR_TILT, 0.0f);
}
MutableSpan<float> CurvesGeometry::tilt_for_write()
{
return get_mutable_attribute<float>(*this, ATTR_DOMAIN_POINT, ATTR_TILT);
}
VArray<int8_t> CurvesGeometry::handle_types_left() const
{
return get_varray_attribute<int8_t>(*this, ATTR_DOMAIN_POINT, ATTR_HANDLE_TYPE_LEFT, 0);
}
MutableSpan<int8_t> CurvesGeometry::handle_types_left_for_write()
{
return get_mutable_attribute<int8_t>(*this, ATTR_DOMAIN_POINT, ATTR_HANDLE_TYPE_LEFT, 0);
}
VArray<int8_t> CurvesGeometry::handle_types_right() const
{
return get_varray_attribute<int8_t>(*this, ATTR_DOMAIN_POINT, ATTR_HANDLE_TYPE_RIGHT, 0);
}
MutableSpan<int8_t> CurvesGeometry::handle_types_right_for_write()
{
return get_mutable_attribute<int8_t>(*this, ATTR_DOMAIN_POINT, ATTR_HANDLE_TYPE_RIGHT, 0);
}
Span<float3> CurvesGeometry::handle_positions_left() const
{
return get_span_attribute<float3>(*this, ATTR_DOMAIN_POINT, ATTR_HANDLE_POSITION_LEFT);
}
MutableSpan<float3> CurvesGeometry::handle_positions_left_for_write()
{
return get_mutable_attribute<float3>(*this, ATTR_DOMAIN_POINT, ATTR_HANDLE_POSITION_LEFT);
}
Span<float3> CurvesGeometry::handle_positions_right() const
{
return get_span_attribute<float3>(*this, ATTR_DOMAIN_POINT, ATTR_HANDLE_POSITION_RIGHT);
}
MutableSpan<float3> CurvesGeometry::handle_positions_right_for_write()
{
return get_mutable_attribute<float3>(*this, ATTR_DOMAIN_POINT, ATTR_HANDLE_POSITION_RIGHT);
}
VArray<int8_t> CurvesGeometry::nurbs_orders() const
{
return get_varray_attribute<int8_t>(*this, ATTR_DOMAIN_CURVE, ATTR_NURBS_ORDER, 4);
}
MutableSpan<int8_t> CurvesGeometry::nurbs_orders_for_write()
{
return get_mutable_attribute<int8_t>(*this, ATTR_DOMAIN_CURVE, ATTR_NURBS_ORDER, 4);
}
Span<float> CurvesGeometry::nurbs_weights() const
{
return get_span_attribute<float>(*this, ATTR_DOMAIN_POINT, ATTR_NURBS_WEIGHT);
}
MutableSpan<float> CurvesGeometry::nurbs_weights_for_write()
{
return get_mutable_attribute<float>(*this, ATTR_DOMAIN_POINT, ATTR_NURBS_WEIGHT);
}
VArray<int8_t> CurvesGeometry::nurbs_knots_modes() const
{
return get_varray_attribute<int8_t>(*this, ATTR_DOMAIN_CURVE, ATTR_NURBS_KNOTS_MODE, 0);
}
MutableSpan<int8_t> CurvesGeometry::nurbs_knots_modes_for_write()
{
return get_mutable_attribute<int8_t>(*this, ATTR_DOMAIN_CURVE, ATTR_NURBS_KNOTS_MODE, 0);
}
Span<float2> CurvesGeometry::surface_uv_coords() const
{
return get_span_attribute<float2>(*this, ATTR_DOMAIN_CURVE, ATTR_SURFACE_UV_COORDINATE);
}
MutableSpan<float2> CurvesGeometry::surface_uv_coords_for_write()
{
return get_mutable_attribute<float2>(*this, ATTR_DOMAIN_CURVE, ATTR_SURFACE_UV_COORDINATE);
}
Span<MDeformVert> CurvesGeometry::deform_verts() const
{
const MDeformVert *dverts = static_cast<const MDeformVert *>(
CustomData_get_layer(&this->point_data, CD_MDEFORMVERT));
if (dverts == nullptr) {
return {};
}
return {dverts, this->point_num};
}
MutableSpan<MDeformVert> CurvesGeometry::deform_verts_for_write()
{
MDeformVert *dvert = static_cast<MDeformVert *>(
CustomData_get_layer_for_write(&this->point_data, CD_MDEFORMVERT, this->point_num));
if (dvert != nullptr) {
return {dvert, this->point_num};
}
return {static_cast<MDeformVert *>(CustomData_add_layer(
&this->point_data, CD_MDEFORMVERT, CD_SET_DEFAULT, this->point_num)),
this->point_num};
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Evaluation
* \{ */
template<typename CountFn> void build_offsets(MutableSpan<int> offsets, const CountFn &count_fn)
{
int offset = 0;
for (const int i : offsets.drop_back(1).index_range()) {
offsets[i] = offset;
offset += count_fn(i);
}
offsets.last() = offset;
}
static void calculate_evaluated_offsets(const CurvesGeometry &curves,
MutableSpan<int> offsets,
MutableSpan<int> all_bezier_offsets)
{
const OffsetIndices points_by_curve = curves.points_by_curve();
const VArray<int8_t> types = curves.curve_types();
const VArray<int> resolution = curves.resolution();
const VArray<bool> cyclic = curves.cyclic();
VArraySpan<int8_t> handle_types_left;
VArraySpan<int8_t> handle_types_right;
if (curves.has_curve_with_type(CURVE_TYPE_BEZIER)) {
handle_types_left = curves.handle_types_left();
handle_types_right = curves.handle_types_right();
}
const VArray<int8_t> nurbs_orders = curves.nurbs_orders();
const VArray<int8_t> nurbs_knots_modes = curves.nurbs_knots_modes();
build_offsets(offsets, [&](const int curve_index) -> int {
const IndexRange points = points_by_curve[curve_index];
switch (types[curve_index]) {
case CURVE_TYPE_CATMULL_ROM:
return curves::catmull_rom::calculate_evaluated_num(
points.size(), cyclic[curve_index], resolution[curve_index]);
case CURVE_TYPE_POLY:
return points.size();
case CURVE_TYPE_BEZIER: {
const IndexRange offsets = curves::per_curve_point_offsets_range(points, curve_index);
curves::bezier::calculate_evaluated_offsets(handle_types_left.slice(points),
handle_types_right.slice(points),
cyclic[curve_index],
resolution[curve_index],
all_bezier_offsets.slice(offsets));
return all_bezier_offsets[offsets.last()];
}
case CURVE_TYPE_NURBS:
return curves::nurbs::calculate_evaluated_num(points.size(),
nurbs_orders[curve_index],
cyclic[curve_index],
resolution[curve_index],
KnotsMode(nurbs_knots_modes[curve_index]));
}
BLI_assert_unreachable();
return 0;
});
}
OffsetIndices<int> CurvesGeometry::evaluated_points_by_curve() const
{
const bke::CurvesGeometryRuntime &runtime = *this->runtime;
if (this->is_single_type(CURVE_TYPE_POLY)) {
/* When all the curves are poly curves, the evaluated offsets are the same as the control
* point offsets, so it's possible to completely avoid building a new offsets array. */
runtime.evaluated_offsets_cache.ensure([&](CurvesGeometryRuntime::EvaluatedOffsets &r_data) {
r_data.evaluated_offsets.clear_and_shrink();
r_data.all_bezier_offsets.clear_and_shrink();
});
return this->points_by_curve();
}
runtime.evaluated_offsets_cache.ensure([&](CurvesGeometryRuntime::EvaluatedOffsets &r_data) {
r_data.evaluated_offsets.resize(this->curves_num() + 1);
if (this->has_curve_with_type(CURVE_TYPE_BEZIER)) {
r_data.all_bezier_offsets.resize(this->points_num() + this->curves_num());
}
else {
r_data.all_bezier_offsets.clear_and_shrink();
}
calculate_evaluated_offsets(*this, r_data.evaluated_offsets, r_data.all_bezier_offsets);
});
return OffsetIndices<int>(runtime.evaluated_offsets_cache.data().evaluated_offsets);
}
IndexMask CurvesGeometry::indices_for_curve_type(const CurveType type,
IndexMaskMemory &memory) const
{
return this->indices_for_curve_type(type, this->curves_range(), memory);
}
IndexMask CurvesGeometry::indices_for_curve_type(const CurveType type,
const IndexMask &selection,
IndexMaskMemory &memory) const
{
return curves::indices_for_type(
this->curve_types(), this->curve_type_counts(), type, selection, memory);
}
Array<int> CurvesGeometry::point_to_curve_map() const
{
Array<int> map(this->points_num());
offset_indices::build_reverse_map(this->points_by_curve(), map);
return map;
}
void CurvesGeometry::ensure_nurbs_basis_cache() const
{
const bke::CurvesGeometryRuntime &runtime = *this->runtime;
runtime.nurbs_basis_cache.ensure([&](Vector<curves::nurbs::BasisCache> &r_data) {
IndexMaskMemory memory;
const IndexMask nurbs_mask = this->indices_for_curve_type(CURVE_TYPE_NURBS, memory);
if (nurbs_mask.is_empty()) {
r_data.clear_and_shrink();
return;
}
r_data.resize(this->curves_num());
const OffsetIndices<int> points_by_curve = this->points_by_curve();
const OffsetIndices<int> evaluated_points_by_curve = this->evaluated_points_by_curve();
const VArray<bool> cyclic = this->cyclic();
const VArray<int8_t> orders = this->nurbs_orders();
const VArray<int8_t> knots_modes = this->nurbs_knots_modes();
nurbs_mask.foreach_segment(GrainSize(64), [&](const IndexMaskSegment segment) {
Vector<float, 32> knots;
for (const int curve_index : segment) {
const IndexRange points = points_by_curve[curve_index];
const IndexRange evaluated_points = evaluated_points_by_curve[curve_index];
const int8_t order = orders[curve_index];
const bool is_cyclic = cyclic[curve_index];
const KnotsMode mode = KnotsMode(knots_modes[curve_index]);
if (!curves::nurbs::check_valid_num_and_order(points.size(), order, is_cyclic, mode)) {
r_data[curve_index].invalid = true;
continue;
}
knots.reinitialize(curves::nurbs::knots_num(points.size(), order, is_cyclic));
curves::nurbs::calculate_knots(points.size(), mode, order, is_cyclic, knots);
curves::nurbs::calculate_basis_cache(
points.size(), evaluated_points.size(), order, is_cyclic, knots, r_data[curve_index]);
}
});
});
}
Span<float3> CurvesGeometry::evaluated_positions() const
{
const bke::CurvesGeometryRuntime &runtime = *this->runtime;
if (this->is_single_type(CURVE_TYPE_POLY)) {
runtime.evaluated_position_cache.ensure(
[&](Vector<float3> &r_data) { r_data.clear_and_shrink(); });
return this->positions();
}
this->ensure_nurbs_basis_cache();
runtime.evaluated_position_cache.ensure([&](Vector<float3> &r_data) {
r_data.resize(this->evaluated_points_num());
MutableSpan<float3> evaluated_positions = r_data;
const OffsetIndices<int> points_by_curve = this->points_by_curve();
const OffsetIndices<int> evaluated_points_by_curve = this->evaluated_points_by_curve();
const Span<float3> positions = this->positions();
auto evaluate_catmull = [&](const IndexMask &selection) {
const VArray<bool> cyclic = this->cyclic();
const VArray<int> resolution = this->resolution();
selection.foreach_index(GrainSize(128), [&](const int curve_index) {
const IndexRange points = points_by_curve[curve_index];
const IndexRange evaluated_points = evaluated_points_by_curve[curve_index];
curves::catmull_rom::interpolate_to_evaluated(positions.slice(points),
cyclic[curve_index],
resolution[curve_index],
evaluated_positions.slice(evaluated_points));
});
};
auto evaluate_poly = [&](const IndexMask &selection) {
array_utils::copy_group_to_group(
points_by_curve, evaluated_points_by_curve, selection, positions, evaluated_positions);
};
auto evaluate_bezier = [&](const IndexMask &selection) {
const Span<float3> handle_positions_left = this->handle_positions_left();
const Span<float3> handle_positions_right = this->handle_positions_right();
if (handle_positions_left.is_empty() || handle_positions_right.is_empty()) {
curves::fill_points(evaluated_points_by_curve, selection, float3(0), evaluated_positions);
return;
}
const Span<int> all_bezier_offsets =
runtime.evaluated_offsets_cache.data().all_bezier_offsets;
selection.foreach_index(GrainSize(128), [&](const int curve_index) {
const IndexRange points = points_by_curve[curve_index];
const IndexRange evaluated_points = evaluated_points_by_curve[curve_index];
const IndexRange offsets = curves::per_curve_point_offsets_range(points, curve_index);
curves::bezier::calculate_evaluated_positions(positions.slice(points),
handle_positions_left.slice(points),
handle_positions_right.slice(points),
all_bezier_offsets.slice(offsets),
evaluated_positions.slice(evaluated_points));
});
};
auto evaluate_nurbs = [&](const IndexMask &selection) {
this->ensure_nurbs_basis_cache();
const VArray<int8_t> nurbs_orders = this->nurbs_orders();
const Span<float> nurbs_weights = this->nurbs_weights();
const Span<curves::nurbs::BasisCache> nurbs_basis_cache = runtime.nurbs_basis_cache.data();
selection.foreach_index(GrainSize(128), [&](const int curve_index) {
const IndexRange points = points_by_curve[curve_index];
const IndexRange evaluated_points = evaluated_points_by_curve[curve_index];
curves::nurbs::interpolate_to_evaluated(nurbs_basis_cache[curve_index],
nurbs_orders[curve_index],
nurbs_weights.slice_safe(points),
positions.slice(points),
evaluated_positions.slice(evaluated_points));
});
};
curves::foreach_curve_by_type(this->curve_types(),
this->curve_type_counts(),
this->curves_range(),
evaluate_catmull,
evaluate_poly,
evaluate_bezier,
evaluate_nurbs);
});
return runtime.evaluated_position_cache.data();
}
Span<float3> CurvesGeometry::evaluated_tangents() const
{
const bke::CurvesGeometryRuntime &runtime = *this->runtime;
runtime.evaluated_tangent_cache.ensure([&](Vector<float3> &r_data) {
const OffsetIndices<int> evaluated_points_by_curve = this->evaluated_points_by_curve();
const Span<float3> evaluated_positions = this->evaluated_positions();
const VArray<bool> cyclic = this->cyclic();
r_data.resize(this->evaluated_points_num());
MutableSpan<float3> tangents = r_data;
threading::parallel_for(this->curves_range(), 128, [&](IndexRange curves_range) {
for (const int curve_index : curves_range) {
const IndexRange evaluated_points = evaluated_points_by_curve[curve_index];
curves::poly::calculate_tangents(evaluated_positions.slice(evaluated_points),
cyclic[curve_index],
tangents.slice(evaluated_points));
}
});
/* Correct the first and last tangents of non-cyclic Bezier curves so that they align with
* the inner handles. This is a separate loop to avoid the cost when Bezier type curves are
* not used. */
IndexMaskMemory memory;
const IndexMask bezier_mask = this->indices_for_curve_type(CURVE_TYPE_BEZIER, memory);
if (!bezier_mask.is_empty()) {
const OffsetIndices<int> points_by_curve = this->points_by_curve();
const Span<float3> positions = this->positions();
const Span<float3> handles_left = this->handle_positions_left();
const Span<float3> handles_right = this->handle_positions_right();
bezier_mask.foreach_index(GrainSize(1024), [&](const int curve_index) {
if (cyclic[curve_index]) {
return;
}
const IndexRange points = points_by_curve[curve_index];
const IndexRange evaluated_points = evaluated_points_by_curve[curve_index];
const float epsilon = 1e-6f;
if (!math::almost_equal_relative(
handles_right[points.first()], positions[points.first()], epsilon))
{
tangents[evaluated_points.first()] = math::normalize(handles_right[points.first()] -
positions[points.first()]);
}
if (!math::almost_equal_relative(
handles_left[points.last()], positions[points.last()], epsilon)) {
tangents[evaluated_points.last()] = math::normalize(positions[points.last()] -
handles_left[points.last()]);
}
});
}
});
return runtime.evaluated_tangent_cache.data();
}
static void rotate_directions_around_axes(MutableSpan<float3> directions,
const Span<float3> axes,
const Span<float> angles)
{
for (const int i : directions.index_range()) {
directions[i] = math::rotate_direction_around_axis(directions[i], axes[i], angles[i]);
}
}
static void evaluate_generic_data_for_curve(
const int curve_index,
const IndexRange points,
const VArray<int8_t> &types,
const VArray<bool> &cyclic,
const VArray<int> &resolution,
const Span<int> all_bezier_evaluated_offsets,
const Span<curves::nurbs::BasisCache> nurbs_basis_cache,
const VArray<int8_t> &nurbs_orders,
const Span<float> nurbs_weights,
const GSpan src,
GMutableSpan dst)
{
switch (types[curve_index]) {
case CURVE_TYPE_CATMULL_ROM:
curves::catmull_rom::interpolate_to_evaluated(
src, cyclic[curve_index], resolution[curve_index], dst);
break;
case CURVE_TYPE_POLY:
dst.copy_from(src);
break;
case CURVE_TYPE_BEZIER: {
const IndexRange offsets = curves::per_curve_point_offsets_range(points, curve_index);
curves::bezier::interpolate_to_evaluated(
src, all_bezier_evaluated_offsets.slice(offsets), dst);
break;
}
case CURVE_TYPE_NURBS:
curves::nurbs::interpolate_to_evaluated(nurbs_basis_cache[curve_index],
nurbs_orders[curve_index],
nurbs_weights.slice_safe(points),
src,
dst);
break;
}
}
Span<float3> CurvesGeometry::evaluated_normals() const
{
const bke::CurvesGeometryRuntime &runtime = *this->runtime;
this->ensure_nurbs_basis_cache();
runtime.evaluated_normal_cache.ensure([&](Vector<float3> &r_data) {
const OffsetIndices<int> points_by_curve = this->points_by_curve();
const OffsetIndices<int> evaluated_points_by_curve = this->evaluated_points_by_curve();
const VArray<int8_t> types = this->curve_types();
const VArray<bool> cyclic = this->cyclic();
const VArray<int8_t> normal_mode = this->normal_mode();
const VArray<int> resolution = this->resolution();
const VArray<int8_t> nurbs_orders = this->nurbs_orders();
const Span<float> nurbs_weights = this->nurbs_weights();
const Span<int> all_bezier_offsets = runtime.evaluated_offsets_cache.data().all_bezier_offsets;
const Span<curves::nurbs::BasisCache> nurbs_basis_cache = runtime.nurbs_basis_cache.data();
const Span<float3> evaluated_tangents = this->evaluated_tangents();
const VArray<float> tilt = this->tilt();
VArraySpan<float> tilt_span;
const bool use_tilt = !(tilt.is_single() && tilt.get_internal_single() == 0.0f);
if (use_tilt) {
tilt_span = tilt;
}
r_data.resize(this->evaluated_points_num());
MutableSpan<float3> evaluated_normals = r_data;
threading::parallel_for(this->curves_range(), 128, [&](IndexRange curves_range) {
/* Reuse a buffer for the evaluated tilts. */
Vector<float> evaluated_tilts;
for (const int curve_index : curves_range) {
const IndexRange evaluated_points = evaluated_points_by_curve[curve_index];
switch (normal_mode[curve_index]) {
case NORMAL_MODE_Z_UP:
curves::poly::calculate_normals_z_up(evaluated_tangents.slice(evaluated_points),
evaluated_normals.slice(evaluated_points));
break;
case NORMAL_MODE_MINIMUM_TWIST:
curves::poly::calculate_normals_minimum(evaluated_tangents.slice(evaluated_points),
cyclic[curve_index],
evaluated_normals.slice(evaluated_points));
break;
}
/* If the "tilt" attribute exists, rotate the normals around the tangents by the
* evaluated angles. We can avoid copying the tilts to evaluate them for poly curves. */
if (use_tilt) {
const IndexRange points = points_by_curve[curve_index];
if (types[curve_index] == CURVE_TYPE_POLY) {
rotate_directions_around_axes(evaluated_normals.slice(evaluated_points),
evaluated_tangents.slice(evaluated_points),
tilt_span.slice(points));
}
else {
evaluated_tilts.reinitialize(evaluated_points.size());
evaluate_generic_data_for_curve(curve_index,
points,
types,
cyclic,
resolution,
all_bezier_offsets,
nurbs_basis_cache,
nurbs_orders,
nurbs_weights,
tilt_span.slice(points),
evaluated_tilts.as_mutable_span());
rotate_directions_around_axes(evaluated_normals.slice(evaluated_points),
evaluated_tangents.slice(evaluated_points),
evaluated_tilts.as_span());
}
}
}
});
});
return this->runtime->evaluated_normal_cache.data();
}
void CurvesGeometry::interpolate_to_evaluated(const int curve_index,
const GSpan src,
GMutableSpan dst) const
{
const bke::CurvesGeometryRuntime &runtime = *this->runtime;
const OffsetIndices points_by_curve = this->points_by_curve();
const IndexRange points = points_by_curve[curve_index];
BLI_assert(src.size() == points.size());
BLI_assert(dst.size() == this->evaluated_points_by_curve()[curve_index].size());
evaluate_generic_data_for_curve(curve_index,
points,
this->curve_types(),
this->cyclic(),
this->resolution(),
runtime.evaluated_offsets_cache.data().all_bezier_offsets,
runtime.nurbs_basis_cache.data(),
this->nurbs_orders(),
this->nurbs_weights(),
src,
dst);
}
void CurvesGeometry::interpolate_to_evaluated(const GSpan src, GMutableSpan dst) const
{
const bke::CurvesGeometryRuntime &runtime = *this->runtime;
const OffsetIndices points_by_curve = this->points_by_curve();
const OffsetIndices evaluated_points_by_curve = this->evaluated_points_by_curve();
const VArray<int8_t> types = this->curve_types();
const VArray<int> resolution = this->resolution();
const VArray<bool> cyclic = this->cyclic();
const VArray<int8_t> nurbs_orders = this->nurbs_orders();
const Span<float> nurbs_weights = this->nurbs_weights();
const Span<int> all_bezier_offsets = runtime.evaluated_offsets_cache.data().all_bezier_offsets;
const Span<curves::nurbs::BasisCache> nurbs_basis_cache = runtime.nurbs_basis_cache.data();
threading::parallel_for(this->curves_range(), 512, [&](IndexRange curves_range) {
for (const int curve_index : curves_range) {
const IndexRange points = points_by_curve[curve_index];
const IndexRange evaluated_points = evaluated_points_by_curve[curve_index];
evaluate_generic_data_for_curve(curve_index,
points,
types,
cyclic,
resolution,
all_bezier_offsets,
nurbs_basis_cache,
nurbs_orders,
nurbs_weights,
src.slice(points),
dst.slice(evaluated_points));
}
});
}
void CurvesGeometry::ensure_evaluated_lengths() const
{
const bke::CurvesGeometryRuntime &runtime = *this->runtime;
runtime.evaluated_length_cache.ensure([&](Vector<float> &r_data) {
/* Use an extra length value for the final cyclic segment for a consistent size
* (see comment on #evaluated_length_cache). */
const int total_num = this->evaluated_points_num() + this->curves_num();
r_data.resize(total_num);
MutableSpan<float> evaluated_lengths = r_data;
const OffsetIndices<int> evaluated_points_by_curve = this->evaluated_points_by_curve();
const Span<float3> evaluated_positions = this->evaluated_positions();
const VArray<bool> curves_cyclic = this->cyclic();
threading::parallel_for(this->curves_range(), 128, [&](IndexRange curves_range) {
for (const int curve_index : curves_range) {
const bool cyclic = curves_cyclic[curve_index];
const IndexRange evaluated_points = evaluated_points_by_curve[curve_index];
const IndexRange lengths_range = this->lengths_range_for_curve(curve_index, cyclic);
length_parameterize::accumulate_lengths(evaluated_positions.slice(evaluated_points),
cyclic,
evaluated_lengths.slice(lengths_range));
}
});
});
}
void CurvesGeometry::ensure_can_interpolate_to_evaluated() const
{
this->evaluated_points_by_curve();
this->ensure_nurbs_basis_cache();
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Operations
* \{ */
void CurvesGeometry::resize(const int points_num, const int curves_num)
{
if (points_num != this->point_num) {
CustomData_realloc(&this->point_data, this->points_num(), points_num);
this->point_num = points_num;
}
if (curves_num != this->curve_num) {
CustomData_realloc(&this->curve_data, this->curves_num(), curves_num);
implicit_sharing::resize_trivial_array(&this->curve_offsets,
&this->runtime->curve_offsets_sharing_info,
this->curve_num == 0 ? 0 : (this->curve_num + 1),
curves_num + 1);
/* Set common values for convenience. */
this->curve_offsets[0] = 0;
this->curve_offsets[curves_num] = this->point_num;
this->curve_num = curves_num;
}
this->tag_topology_changed();
}
void CurvesGeometry::tag_positions_changed()
{
this->runtime->evaluated_position_cache.tag_dirty();
this->runtime->evaluated_tangent_cache.tag_dirty();
this->runtime->evaluated_normal_cache.tag_dirty();
this->runtime->evaluated_length_cache.tag_dirty();
this->runtime->bounds_cache.tag_dirty();
}
void CurvesGeometry::tag_topology_changed()
{
this->tag_positions_changed();
this->runtime->evaluated_offsets_cache.tag_dirty();
this->runtime->nurbs_basis_cache.tag_dirty();
}
void CurvesGeometry::tag_normals_changed()
{
this->runtime->evaluated_normal_cache.tag_dirty();
}
void CurvesGeometry::tag_radii_changed() {}
static void translate_positions(MutableSpan<float3> positions, const float3 &translation)
{
threading::parallel_for(positions.index_range(), 2048, [&](const IndexRange range) {
for (float3 &position : positions.slice(range)) {
position += translation;
}
});
}
static void transform_positions(MutableSpan<float3> positions, const float4x4 &matrix)
{
threading::parallel_for(positions.index_range(), 1024, [&](const IndexRange range) {
for (float3 &position : positions.slice(range)) {
position = math::transform_point(matrix, position);
}
});
}
void CurvesGeometry::calculate_bezier_auto_handles()
{
if (!this->has_curve_with_type(CURVE_TYPE_BEZIER)) {
return;
}
if (this->handle_positions_left().is_empty() || this->handle_positions_right().is_empty()) {
return;
}
const OffsetIndices points_by_curve = this->points_by_curve();
const VArray<int8_t> types = this->curve_types();
const VArray<bool> cyclic = this->cyclic();
const VArraySpan<int8_t> types_left{this->handle_types_left()};
const VArraySpan<int8_t> types_right{this->handle_types_right()};
const Span<float3> positions = this->positions();
MutableSpan<float3> positions_left = this->handle_positions_left_for_write();
MutableSpan<float3> positions_right = this->handle_positions_right_for_write();
threading::parallel_for(this->curves_range(), 128, [&](IndexRange range) {
for (const int i_curve : range) {
if (types[i_curve] == CURVE_TYPE_BEZIER) {
const IndexRange points = points_by_curve[i_curve];
curves::bezier::calculate_auto_handles(cyclic[i_curve],
types_left.slice(points),
types_right.slice(points),
positions.slice(points),
positions_left.slice(points),
positions_right.slice(points));
}
}
});
}
void CurvesGeometry::translate(const float3 &translation)
{
if (math::is_zero(translation)) {
return;
}
std::optional<Bounds<float3>> bounds;
if (this->runtime->bounds_cache.is_cached()) {
bounds = this->runtime->bounds_cache.data();
}
translate_positions(this->positions_for_write(), translation);
if (!this->handle_positions_left().is_empty()) {
translate_positions(this->handle_positions_left_for_write(), translation);
}
if (!this->handle_positions_right().is_empty()) {
translate_positions(this->handle_positions_right_for_write(), translation);
}
this->tag_positions_changed();
if (bounds) {
bounds->min += translation;
bounds->max += translation;
this->runtime->bounds_cache.ensure([&](blender::Bounds<float3> &r_data) { r_data = *bounds; });
}
}
void CurvesGeometry::transform(const float4x4 &matrix)
{
transform_positions(this->positions_for_write(), matrix);
if (!this->handle_positions_left().is_empty()) {
transform_positions(this->handle_positions_left_for_write(), matrix);
}
if (!this->handle_positions_right().is_empty()) {
transform_positions(this->handle_positions_right_for_write(), matrix);
}
this->tag_positions_changed();
}
std::optional<Bounds<float3>> CurvesGeometry::bounds_min_max() const
{
if (this->points_num() == 0) {
return std::nullopt;
}
this->runtime->bounds_cache.ensure(
[&](Bounds<float3> &r_bounds) { r_bounds = *bounds::min_max(this->evaluated_positions()); });
return this->runtime->bounds_cache.data();
}
CurvesGeometry curves_copy_point_selection(
const CurvesGeometry &curves,
const IndexMask &points_to_copy,
const AnonymousAttributePropagationInfo &propagation_info)
{
const Array<int> point_to_curve_map = curves.point_to_curve_map();
Array<int> curve_point_counts(curves.curves_num(), 0);
points_to_copy.foreach_index(
[&](const int64_t point_i) { curve_point_counts[point_to_curve_map[point_i]]++; });
IndexMaskMemory memory;
const IndexMask curves_to_copy = IndexMask::from_predicate(
curves.curves_range(), GrainSize(4096), memory, [&](const int64_t i) {
return curve_point_counts[i] > 0;
});
CurvesGeometry dst_curves(points_to_copy.size(), curves_to_copy.size());
threading::parallel_invoke(
dst_curves.curves_num() > 1024,
[&]() {
MutableSpan<int> new_curve_offsets = dst_curves.offsets_for_write();
array_utils::gather(
curve_point_counts.as_span(), curves_to_copy, new_curve_offsets.drop_back(1));
offset_indices::accumulate_counts_to_offsets(new_curve_offsets);
},
[&]() {
gather_attributes(curves.attributes(),
ATTR_DOMAIN_POINT,
propagation_info,
{},
points_to_copy,
dst_curves.attributes_for_write());
gather_attributes(curves.attributes(),
ATTR_DOMAIN_CURVE,
propagation_info,
{},
curves_to_copy,
dst_curves.attributes_for_write());
});
if (dst_curves.curves_num() == curves.curves_num()) {
dst_curves.runtime->type_counts = curves.runtime->type_counts;
}
else {
dst_curves.remove_attributes_based_on_types();
}
return dst_curves;
}
void CurvesGeometry::remove_points(const IndexMask &points_to_delete,
const AnonymousAttributePropagationInfo &propagation_info)
{
if (points_to_delete.is_empty()) {
return;
}
if (points_to_delete.size() == this->points_num()) {
*this = {};
return;
}
IndexMaskMemory memory;
const IndexMask points_to_copy = points_to_delete.complement(this->points_range(), memory);
*this = curves_copy_point_selection(*this, points_to_copy, propagation_info);
}
CurvesGeometry curves_copy_curve_selection(
const CurvesGeometry &curves,
const IndexMask &curves_to_copy,
const AnonymousAttributePropagationInfo &propagation_info)
{
const OffsetIndices points_by_curve = curves.points_by_curve();
CurvesGeometry dst_curves(0, curves_to_copy.size());
const OffsetIndices dst_points_by_curve = offset_indices::gather_selected_offsets(
points_by_curve, curves_to_copy, dst_curves.offsets_for_write());
dst_curves.resize(dst_points_by_curve.total_size(), dst_curves.curves_num());
const AttributeAccessor src_attributes = curves.attributes();
MutableAttributeAccessor dst_attributes = dst_curves.attributes_for_write();
gather_attributes_group_to_group(src_attributes,
ATTR_DOMAIN_POINT,
propagation_info,
{},
points_by_curve,
dst_points_by_curve,
curves_to_copy,
dst_attributes);
gather_attributes(
src_attributes, ATTR_DOMAIN_CURVE, propagation_info, {}, curves_to_copy, dst_attributes);
dst_curves.update_curve_types();
dst_curves.remove_attributes_based_on_types();
return dst_curves;
}
void CurvesGeometry::remove_curves(const IndexMask &curves_to_delete,
const AnonymousAttributePropagationInfo &propagation_info)
{
if (curves_to_delete.is_empty()) {
return;
}
if (curves_to_delete.size() == this->curves_num()) {
*this = {};
return;
}
IndexMaskMemory memory;
const IndexMask curves_to_copy = curves_to_delete.complement(this->curves_range(), memory);
*this = curves_copy_curve_selection(*this, curves_to_copy, propagation_info);
}
template<typename T>
static void reverse_curve_point_data(const CurvesGeometry &curves,
const IndexMask &curve_selection,
MutableSpan<T> data)
{
const OffsetIndices points_by_curve = curves.points_by_curve();
curve_selection.foreach_index(
GrainSize(256), [&](const int curve_i) { data.slice(points_by_curve[curve_i]).reverse(); });
}
template<typename T>
static void reverse_swap_curve_point_data(const CurvesGeometry &curves,
const IndexMask &curve_selection,
MutableSpan<T> data_a,
MutableSpan<T> data_b)
{
const OffsetIndices points_by_curve = curves.points_by_curve();
curve_selection.foreach_index(GrainSize(256), [&](const int curve_i) {
const IndexRange points = points_by_curve[curve_i];
MutableSpan<T> a = data_a.slice(points);
MutableSpan<T> b = data_b.slice(points);
for (const int i : IndexRange(points.size() / 2)) {
const int end_index = points.size() - 1 - i;
std::swap(a[end_index], b[i]);
std::swap(b[end_index], a[i]);
}
if (points.size() % 2) {
const int64_t middle_index = points.size() / 2;
std::swap(a[middle_index], b[middle_index]);
}
});
}
void CurvesGeometry::reverse_curves(const IndexMask &curves_to_reverse)
{
Set<StringRef> bezier_handle_names{{ATTR_HANDLE_POSITION_LEFT,
ATTR_HANDLE_POSITION_RIGHT,
ATTR_HANDLE_TYPE_LEFT,
ATTR_HANDLE_TYPE_RIGHT}};
MutableAttributeAccessor attributes = this->attributes_for_write();
attributes.for_all([&](const AttributeIDRef &id, AttributeMetaData meta_data) {
if (meta_data.domain != ATTR_DOMAIN_POINT) {
return true;
}
if (meta_data.data_type == CD_PROP_STRING) {
return true;
}
if (bezier_handle_names.contains(id.name())) {
return true;
}
GSpanAttributeWriter attribute = attributes.lookup_for_write_span(id);
attribute_math::convert_to_static_type(attribute.span.type(), [&](auto dummy) {
using T = decltype(dummy);
reverse_curve_point_data<T>(*this, curves_to_reverse, attribute.span.typed<T>());
});
attribute.finish();
return true;
});
/* In order to maintain the shape of Bezier curves, handle attributes must reverse, but also the
* values for the left and right must swap. Use a utility to swap and reverse at the same time,
* to avoid loading the attribute twice. Generally we can expect the right layer to exist when
* the left does, but there's no need to count on it, so check for both attributes. */
if (attributes.contains(ATTR_HANDLE_POSITION_LEFT) &&
attributes.contains(ATTR_HANDLE_POSITION_RIGHT))
{
reverse_swap_curve_point_data(*this,
curves_to_reverse,
this->handle_positions_left_for_write(),
this->handle_positions_right_for_write());
}
if (attributes.contains(ATTR_HANDLE_TYPE_LEFT) && attributes.contains(ATTR_HANDLE_TYPE_RIGHT)) {
reverse_swap_curve_point_data(*this,
curves_to_reverse,
this->handle_types_left_for_write(),
this->handle_types_right_for_write());
}
this->tag_topology_changed();
}
void CurvesGeometry::remove_attributes_based_on_types()
{
MutableAttributeAccessor attributes = this->attributes_for_write();
if (!this->has_curve_with_type(CURVE_TYPE_BEZIER)) {
attributes.remove(ATTR_HANDLE_TYPE_LEFT);
attributes.remove(ATTR_HANDLE_TYPE_RIGHT);
attributes.remove(ATTR_HANDLE_POSITION_LEFT);
attributes.remove(ATTR_HANDLE_POSITION_RIGHT);
}
if (!this->has_curve_with_type(CURVE_TYPE_NURBS)) {
attributes.remove(ATTR_NURBS_WEIGHT);
attributes.remove(ATTR_NURBS_ORDER);
attributes.remove(ATTR_NURBS_KNOTS_MODE);
}
if (!this->has_curve_with_type({CURVE_TYPE_BEZIER, CURVE_TYPE_CATMULL_ROM, CURVE_TYPE_NURBS})) {
attributes.remove(ATTR_RESOLUTION);
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Domain Interpolation
* \{ */
/**
* Mix together all of a curve's control point values.
*
* \note Theoretically this interpolation does not need to compute all values at once.
* However, doing that makes the implementation simpler, and this can be optimized in the future if
* only some values are required.
*/
template<typename T>
static void adapt_curve_domain_point_to_curve_impl(const CurvesGeometry &curves,
const VArray<T> &old_values,
MutableSpan<T> r_values)
{
attribute_math::DefaultMixer<T> mixer(r_values);
const OffsetIndices points_by_curve = curves.points_by_curve();
threading::parallel_for(curves.curves_range(), 128, [&](const IndexRange range) {
for (const int i_curve : range) {
for (const int i_point : points_by_curve[i_curve]) {
mixer.mix_in(i_curve, old_values[i_point]);
}
}
mixer.finalize(range);
});
}
/**
* A curve is selected if all of its control points were selected.
*
* \note Theoretically this interpolation does not need to compute all values at once.
* However, doing that makes the implementation simpler, and this can be optimized in the future if
* only some values are required.
*/
template<>
void adapt_curve_domain_point_to_curve_impl(const CurvesGeometry &curves,
const VArray<bool> &old_values,
MutableSpan<bool> r_values)
{
const OffsetIndices points_by_curve = curves.points_by_curve();
r_values.fill(true);
for (const int i_curve : IndexRange(curves.curves_num())) {
for (const int i_point : points_by_curve[i_curve]) {
if (!old_values[i_point]) {
r_values[i_curve] = false;
break;
}
}
}
}
static GVArray adapt_curve_domain_point_to_curve(const CurvesGeometry &curves,
const GVArray &varray)
{
GVArray new_varray;
attribute_math::convert_to_static_type(varray.type(), [&](auto dummy) {
using T = decltype(dummy);
if constexpr (!std::is_void_v<attribute_math::DefaultMixer<T>>) {
Array<T> values(curves.curves_num());
adapt_curve_domain_point_to_curve_impl<T>(curves, varray.typed<T>(), values);
new_varray = VArray<T>::ForContainer(std::move(values));
}
});
return new_varray;
}
/**
* Copy the value from a curve to all of its points.
*
* \note Theoretically this interpolation does not need to compute all values at once.
* However, doing that makes the implementation simpler, and this can be optimized in the future if
* only some values are required.
*/
template<typename T>
static void adapt_curve_domain_curve_to_point_impl(const CurvesGeometry &curves,
const VArray<T> &old_values,
MutableSpan<T> r_values)
{
const OffsetIndices points_by_curve = curves.points_by_curve();
for (const int i_curve : IndexRange(curves.curves_num())) {
r_values.slice(points_by_curve[i_curve]).fill(old_values[i_curve]);
}
}
static GVArray adapt_curve_domain_curve_to_point(const CurvesGeometry &curves,
const GVArray &varray)
{
GVArray new_varray;
attribute_math::convert_to_static_type(varray.type(), [&](auto dummy) {
using T = decltype(dummy);
Array<T> values(curves.points_num());
adapt_curve_domain_curve_to_point_impl<T>(curves, varray.typed<T>(), values);
new_varray = VArray<T>::ForContainer(std::move(values));
});
return new_varray;
}
GVArray CurvesGeometry::adapt_domain(const GVArray &varray,
const eAttrDomain from,
const eAttrDomain to) const
{
if (!varray) {
return {};
}
if (varray.is_empty()) {
return {};
}
if (from == to) {
return varray;
}
if (varray.is_single()) {
BUFFER_FOR_CPP_TYPE_VALUE(varray.type(), value);
varray.get_internal_single(value);
return GVArray::ForSingle(varray.type(), this->attributes().domain_size(to), value);
}
if (from == ATTR_DOMAIN_POINT && to == ATTR_DOMAIN_CURVE) {
return adapt_curve_domain_point_to_curve(*this, varray);
}
if (from == ATTR_DOMAIN_CURVE && to == ATTR_DOMAIN_POINT) {
return adapt_curve_domain_curve_to_point(*this, varray);
}
BLI_assert_unreachable();
return {};
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name File reading/writing.
* \{ */
void CurvesGeometry::blend_read(BlendDataReader &reader)
{
this->runtime = MEM_new<blender::bke::CurvesGeometryRuntime>(__func__);
CustomData_blend_read(&reader, &this->point_data, this->point_num);
CustomData_blend_read(&reader, &this->curve_data, this->curve_num);
if (this->curve_offsets) {
BLO_read_int32_array(&reader, this->curve_num + 1, &this->curve_offsets);
this->runtime->curve_offsets_sharing_info = implicit_sharing::info_for_mem_free(
this->curve_offsets);
}
BLO_read_list(&reader, &this->vertex_group_names);
/* Recalculate curve type count cache that isn't saved in files. */
this->update_curve_types();
}
CurvesGeometry::BlendWriteData CurvesGeometry::blend_write_prepare()
{
CurvesGeometry::BlendWriteData write_data;
CustomData_blend_write_prepare(this->point_data, write_data.point_layers);
CustomData_blend_write_prepare(this->curve_data, write_data.curve_layers);
return write_data;
}
void CurvesGeometry::blend_write(BlendWriter &writer,
ID &id,
const CurvesGeometry::BlendWriteData &write_data)
{
CustomData_blend_write(
&writer, &this->point_data, write_data.point_layers, this->point_num, CD_MASK_ALL, &id);
CustomData_blend_write(
&writer, &this->curve_data, write_data.curve_layers, this->curve_num, CD_MASK_ALL, &id);
BLO_write_int32_array(&writer, this->curve_num + 1, this->curve_offsets);
BKE_defbase_blend_write(&writer, &this->vertex_group_names);
}
/** \} */
} // namespace blender::bke
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