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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BLI_array.hh"
#include "BLI_index_range.hh"
#include "BLI_listbase.h"
#include "BLI_map.hh"
#include "BLI_span.hh"
#include "BLI_string_ref.hh"
#include "BLI_task.hh"
#include "BLI_vector.hh"
#include "DNA_curve_types.h"
#include "BKE_anonymous_attribute.hh"
#include "BKE_curve.h"
#include "BKE_curves.hh"
#include "BKE_geometry_set.hh"
#include "BKE_spline.hh"
using blender::Array;
using blender::float3;
using blender::float4x4;
using blender::GVArray;
using blender::GVArray_GSpan;
using blender::IndexRange;
using blender::Map;
using blender::MutableSpan;
using blender::Span;
using blender::StringRefNull;
using blender::VArray;
using blender::VArray_Span;
using blender::Vector;
using blender::bke::AttributeIDRef;
using blender::bke::OutputAttribute;
using blender::bke::OutputAttribute_Typed;
using blender::bke::ReadAttributeLookup;
blender::Span<SplinePtr> CurveEval::splines() const
{
return splines_;
}
blender::MutableSpan<SplinePtr> CurveEval::splines()
{
return splines_;
}
bool CurveEval::has_spline_with_type(const CurveType type) const
{
for (const SplinePtr &spline : this->splines()) {
if (spline->type() == type) {
return true;
}
}
return false;
}
void CurveEval::resize(const int size)
{
splines_.resize(size);
attributes.reallocate(size);
}
void CurveEval::add_spline(SplinePtr spline)
{
splines_.append(std::move(spline));
}
void CurveEval::add_splines(MutableSpan<SplinePtr> splines)
{
for (SplinePtr &spline : splines) {
this->add_spline(std::move(spline));
}
}
void CurveEval::remove_splines(blender::IndexMask mask)
{
for (int i = mask.size() - 1; i >= 0; i--) {
splines_.remove_and_reorder(mask.indices()[i]);
}
}
void CurveEval::translate(const float3 &translation)
{
for (SplinePtr &spline : this->splines()) {
spline->translate(translation);
spline->mark_cache_invalid();
}
}
void CurveEval::transform(const float4x4 &matrix)
{
for (SplinePtr &spline : this->splines()) {
spline->transform(matrix);
}
}
bool CurveEval::bounds_min_max(float3 &min, float3 &max, const bool use_evaluated) const
{
bool have_minmax = false;
for (const SplinePtr &spline : this->splines()) {
if (spline->size()) {
spline->bounds_min_max(min, max, use_evaluated);
have_minmax = true;
}
}
return have_minmax;
}
float CurveEval::total_length() const
{
float length = 0.0f;
for (const SplinePtr &spline : this->splines()) {
length += spline->length();
}
return length;
}
int CurveEval::total_control_point_size() const
{
int count = 0;
for (const SplinePtr &spline : this->splines()) {
count += spline->size();
}
return count;
}
blender::Array<int> CurveEval::control_point_offsets() const
{
Array<int> offsets(splines_.size() + 1);
int offset = 0;
for (const int i : splines_.index_range()) {
offsets[i] = offset;
offset += splines_[i]->size();
}
offsets.last() = offset;
return offsets;
}
blender::Array<int> CurveEval::evaluated_point_offsets() const
{
Array<int> offsets(splines_.size() + 1);
int offset = 0;
for (const int i : splines_.index_range()) {
offsets[i] = offset;
offset += splines_[i]->evaluated_points_size();
}
offsets.last() = offset;
return offsets;
}
blender::Array<float> CurveEval::accumulated_spline_lengths() const
{
Array<float> spline_lengths(splines_.size() + 1);
float spline_length = 0.0f;
for (const int i : splines_.index_range()) {
spline_lengths[i] = spline_length;
spline_length += splines_[i]->length();
}
spline_lengths.last() = spline_length;
return spline_lengths;
}
void CurveEval::mark_cache_invalid()
{
for (SplinePtr &spline : splines_) {
spline->mark_cache_invalid();
}
}
static HandleType handle_type_from_dna_bezt(const eBezTriple_Handle dna_handle_type)
{
switch (dna_handle_type) {
case HD_FREE:
return BEZIER_HANDLE_FREE;
case HD_AUTO:
return BEZIER_HANDLE_AUTO;
case HD_VECT:
return BEZIER_HANDLE_VECTOR;
case HD_ALIGN:
return BEZIER_HANDLE_ALIGN;
case HD_AUTO_ANIM:
return BEZIER_HANDLE_AUTO;
case HD_ALIGN_DOUBLESIDE:
return BEZIER_HANDLE_ALIGN;
}
BLI_assert_unreachable();
return BEZIER_HANDLE_AUTO;
}
static NormalMode normal_mode_from_dna_curve(const int twist_mode)
{
switch (twist_mode) {
case CU_TWIST_Z_UP:
case CU_TWIST_TANGENT:
return NORMAL_MODE_Z_UP;
case CU_TWIST_MINIMUM:
return NORMAL_MODE_MINIMUM_TWIST;
}
BLI_assert_unreachable();
return NORMAL_MODE_MINIMUM_TWIST;
}
static KnotsMode knots_mode_from_dna_nurb(const short flag)
{
switch (flag & (CU_NURB_ENDPOINT | CU_NURB_BEZIER)) {
case CU_NURB_ENDPOINT:
return NURBS_KNOT_MODE_ENDPOINT;
case CU_NURB_BEZIER:
return NURBS_KNOT_MODE_BEZIER;
case CU_NURB_ENDPOINT | CU_NURB_BEZIER:
return NURBS_KNOT_MODE_ENDPOINT_BEZIER;
default:
return NURBS_KNOT_MODE_NORMAL;
}
BLI_assert_unreachable();
return NURBS_KNOT_MODE_NORMAL;
}
static SplinePtr spline_from_dna_bezier(const Nurb &nurb)
{
std::unique_ptr<BezierSpline> spline = std::make_unique<BezierSpline>();
spline->set_resolution(nurb.resolu);
spline->set_cyclic(nurb.flagu & CU_NURB_CYCLIC);
Span<const BezTriple> src_points{nurb.bezt, nurb.pntsu};
spline->resize(src_points.size());
MutableSpan<float3> positions = spline->positions();
MutableSpan<float3> handle_positions_left = spline->handle_positions_left(true);
MutableSpan<float3> handle_positions_right = spline->handle_positions_right(true);
MutableSpan<int8_t> handle_types_left = spline->handle_types_left();
MutableSpan<int8_t> handle_types_right = spline->handle_types_right();
MutableSpan<float> radii = spline->radii();
MutableSpan<float> tilts = spline->tilts();
blender::threading::parallel_for(src_points.index_range(), 2048, [&](IndexRange range) {
for (const int i : range) {
const BezTriple &bezt = src_points[i];
positions[i] = bezt.vec[1];
handle_positions_left[i] = bezt.vec[0];
handle_types_left[i] = handle_type_from_dna_bezt((eBezTriple_Handle)bezt.h1);
handle_positions_right[i] = bezt.vec[2];
handle_types_right[i] = handle_type_from_dna_bezt((eBezTriple_Handle)bezt.h2);
radii[i] = bezt.radius;
tilts[i] = bezt.tilt;
}
});
return spline;
}
static SplinePtr spline_from_dna_nurbs(const Nurb &nurb)
{
std::unique_ptr<NURBSpline> spline = std::make_unique<NURBSpline>();
spline->set_resolution(nurb.resolu);
spline->set_cyclic(nurb.flagu & CU_NURB_CYCLIC);
spline->set_order(nurb.orderu);
spline->knots_mode = knots_mode_from_dna_nurb(nurb.flagu);
Span<const BPoint> src_points{nurb.bp, nurb.pntsu};
spline->resize(src_points.size());
MutableSpan<float3> positions = spline->positions();
MutableSpan<float> weights = spline->weights();
MutableSpan<float> radii = spline->radii();
MutableSpan<float> tilts = spline->tilts();
blender::threading::parallel_for(src_points.index_range(), 2048, [&](IndexRange range) {
for (const int i : range) {
const BPoint &bp = src_points[i];
positions[i] = bp.vec;
weights[i] = bp.vec[3];
radii[i] = bp.radius;
tilts[i] = bp.tilt;
}
});
return spline;
}
static SplinePtr spline_from_dna_poly(const Nurb &nurb)
{
std::unique_ptr<PolySpline> spline = std::make_unique<PolySpline>();
spline->set_cyclic(nurb.flagu & CU_NURB_CYCLIC);
Span<const BPoint> src_points{nurb.bp, nurb.pntsu};
spline->resize(src_points.size());
MutableSpan<float3> positions = spline->positions();
MutableSpan<float> radii = spline->radii();
MutableSpan<float> tilts = spline->tilts();
blender::threading::parallel_for(src_points.index_range(), 2048, [&](IndexRange range) {
for (const int i : range) {
const BPoint &bp = src_points[i];
positions[i] = bp.vec;
radii[i] = bp.radius;
tilts[i] = bp.tilt;
}
});
return spline;
}
std::unique_ptr<CurveEval> curve_eval_from_dna_curve(const Curve &dna_curve,
const ListBase &nurbs_list)
{
Vector<const Nurb *> nurbs(nurbs_list);
std::unique_ptr<CurveEval> curve = std::make_unique<CurveEval>();
curve->resize(nurbs.size());
MutableSpan<SplinePtr> splines = curve->splines();
blender::threading::parallel_for(nurbs.index_range(), 256, [&](IndexRange range) {
for (const int i : range) {
switch (nurbs[i]->type) {
case CU_BEZIER:
splines[i] = spline_from_dna_bezier(*nurbs[i]);
break;
case CU_NURBS:
splines[i] = spline_from_dna_nurbs(*nurbs[i]);
break;
case CU_POLY:
splines[i] = spline_from_dna_poly(*nurbs[i]);
break;
default:
BLI_assert_unreachable();
break;
}
}
});
/* Normal mode is stored separately in each spline to facilitate combining
* splines from multiple curve objects, where the value may be different. */
const NormalMode normal_mode = normal_mode_from_dna_curve(dna_curve.twist_mode);
for (SplinePtr &spline : curve->splines()) {
spline->normal_mode = normal_mode;
}
return curve;
}
std::unique_ptr<CurveEval> curve_eval_from_dna_curve(const Curve &dna_curve)
{
return curve_eval_from_dna_curve(dna_curve, *BKE_curve_nurbs_get_for_read(&dna_curve));
}
static void copy_attributes_between_components(const GeometryComponent &src_component,
GeometryComponent &dst_component,
Span<std::string> skip)
{
src_component.attribute_foreach(
[&](const AttributeIDRef &id, const AttributeMetaData meta_data) {
if (id.is_named() && skip.contains(id.name())) {
return true;
}
GVArray src_attribute = src_component.attribute_try_get_for_read(
id, meta_data.domain, meta_data.data_type);
if (!src_attribute) {
return true;
}
GVArray_GSpan src_attribute_data{src_attribute};
OutputAttribute dst_attribute = dst_component.attribute_try_get_for_output_only(
id, meta_data.domain, meta_data.data_type);
if (!dst_attribute) {
return true;
}
dst_attribute.varray().set_all(src_attribute_data.data());
dst_attribute.save();
return true;
});
}
std::unique_ptr<CurveEval> curves_to_curve_eval(const Curves &curves)
{
CurveComponent src_component;
src_component.replace(&const_cast<Curves &>(curves), GeometryOwnershipType::ReadOnly);
const blender::bke::CurvesGeometry &geometry = blender::bke::CurvesGeometry::wrap(
curves.geometry);
VArray<int> resolution = geometry.resolution();
VArray<int8_t> normal_mode = geometry.normal_mode();
VArray_Span<float> nurbs_weights{
src_component.attribute_get_for_read<float>("nurbs_weight", ATTR_DOMAIN_POINT, 0.0f)};
VArray_Span<int> nurbs_orders{
src_component.attribute_get_for_read<int>("nurbs_order", ATTR_DOMAIN_CURVE, 4)};
VArray_Span<int8_t> nurbs_knots_modes{
src_component.attribute_get_for_read<int8_t>("knots_mode", ATTR_DOMAIN_CURVE, 0)};
VArray_Span<int8_t> handle_types_right{
src_component.attribute_get_for_read<int8_t>("handle_type_right", ATTR_DOMAIN_POINT, 0)};
VArray_Span<int8_t> handle_types_left{
src_component.attribute_get_for_read<int8_t>("handle_type_left", ATTR_DOMAIN_POINT, 0)};
/* Create splines with the correct size and type. */
VArray<int8_t> curve_types = geometry.curve_types();
std::unique_ptr<CurveEval> curve_eval = std::make_unique<CurveEval>();
for (const int curve_index : curve_types.index_range()) {
const IndexRange point_range = geometry.points_for_curve(curve_index);
std::unique_ptr<Spline> spline;
switch (curve_types[curve_index]) {
case CURVE_TYPE_POLY: {
spline = std::make_unique<PolySpline>();
spline->resize(point_range.size());
break;
}
case CURVE_TYPE_BEZIER: {
std::unique_ptr<BezierSpline> bezier_spline = std::make_unique<BezierSpline>();
bezier_spline->resize(point_range.size());
bezier_spline->set_resolution(resolution[curve_index]);
bezier_spline->handle_types_left().copy_from(handle_types_left.slice(point_range));
bezier_spline->handle_types_right().copy_from(handle_types_right.slice(point_range));
spline = std::move(bezier_spline);
break;
}
case CURVE_TYPE_NURBS: {
std::unique_ptr<NURBSpline> nurb_spline = std::make_unique<NURBSpline>();
nurb_spline->resize(point_range.size());
nurb_spline->set_resolution(resolution[curve_index]);
nurb_spline->weights().copy_from(nurbs_weights.slice(point_range));
nurb_spline->set_order(nurbs_orders[curve_index]);
nurb_spline->knots_mode = static_cast<KnotsMode>(nurbs_knots_modes[curve_index]);
spline = std::move(nurb_spline);
break;
}
case CURVE_TYPE_CATMULL_ROM:
/* Not supported yet. */
BLI_assert_unreachable();
continue;
}
spline->positions().fill(float3(0));
spline->tilts().fill(0.0f);
spline->radii().fill(1.0f);
spline->normal_mode = static_cast<NormalMode>(normal_mode[curve_index]);
curve_eval->add_spline(std::move(spline));
}
curve_eval->attributes.reallocate(curve_eval->splines().size());
CurveComponentLegacy dst_component;
dst_component.replace(curve_eval.get(), GeometryOwnershipType::Editable);
copy_attributes_between_components(src_component,
dst_component,
{"curve_type",
"resolution",
"normal_mode",
"nurbs_weight",
"nurbs_order",
"knots_mode",
"handle_type_right",
"handle_type_left"});
return curve_eval;
}
Curves *curve_eval_to_curves(const CurveEval &curve_eval)
{
Curves *curves = blender::bke::curves_new_nomain(curve_eval.total_control_point_size(),
curve_eval.splines().size());
CurveComponent dst_component;
dst_component.replace(curves, GeometryOwnershipType::Editable);
blender::bke::CurvesGeometry &geometry = blender::bke::CurvesGeometry::wrap(curves->geometry);
geometry.offsets_for_write().copy_from(curve_eval.control_point_offsets());
MutableSpan<int8_t> curve_types = geometry.curve_types_for_write();
OutputAttribute_Typed<int8_t> normal_mode =
dst_component.attribute_try_get_for_output_only<int8_t>("normal_mode", ATTR_DOMAIN_CURVE);
OutputAttribute_Typed<float> nurbs_weight;
OutputAttribute_Typed<int> nurbs_order;
OutputAttribute_Typed<int8_t> nurbs_knots_mode;
if (curve_eval.has_spline_with_type(CURVE_TYPE_NURBS)) {
nurbs_weight = dst_component.attribute_try_get_for_output_only<float>("nurbs_weight",
ATTR_DOMAIN_POINT);
nurbs_order = dst_component.attribute_try_get_for_output_only<int>("nurbs_order",
ATTR_DOMAIN_CURVE);
nurbs_knots_mode = dst_component.attribute_try_get_for_output_only<int8_t>("knots_mode",
ATTR_DOMAIN_CURVE);
}
OutputAttribute_Typed<int8_t> handle_type_right;
OutputAttribute_Typed<int8_t> handle_type_left;
if (curve_eval.has_spline_with_type(CURVE_TYPE_BEZIER)) {
handle_type_right = dst_component.attribute_try_get_for_output_only<int8_t>(
"handle_type_right", ATTR_DOMAIN_POINT);
handle_type_left = dst_component.attribute_try_get_for_output_only<int8_t>("handle_type_left",
ATTR_DOMAIN_POINT);
}
for (const int curve_index : curve_eval.splines().index_range()) {
const Spline &spline = *curve_eval.splines()[curve_index];
curve_types[curve_index] = curve_eval.splines()[curve_index]->type();
normal_mode.as_span()[curve_index] = curve_eval.splines()[curve_index]->normal_mode;
const IndexRange point_range = geometry.points_for_curve(curve_index);
switch (spline.type()) {
case CURVE_TYPE_POLY:
break;
case CURVE_TYPE_BEZIER: {
const BezierSpline &src = static_cast<const BezierSpline &>(spline);
handle_type_right.as_span().slice(point_range).copy_from(src.handle_types_right());
handle_type_left.as_span().slice(point_range).copy_from(src.handle_types_left());
break;
}
case CURVE_TYPE_NURBS: {
const NURBSpline &src = static_cast<const NURBSpline &>(spline);
nurbs_knots_mode.as_span()[curve_index] = static_cast<int8_t>(src.knots_mode);
nurbs_order.as_span()[curve_index] = src.order();
nurbs_weight.as_span().slice(point_range).copy_from(src.weights());
break;
}
case CURVE_TYPE_CATMULL_ROM: {
BLI_assert_unreachable();
break;
}
}
}
normal_mode.save();
nurbs_weight.save();
nurbs_order.save();
nurbs_knots_mode.save();
handle_type_right.save();
handle_type_left.save();
CurveComponentLegacy src_component;
src_component.replace(&const_cast<CurveEval &>(curve_eval), GeometryOwnershipType::ReadOnly);
copy_attributes_between_components(src_component, dst_component, {});
return curves;
}
void CurveEval::assert_valid_point_attributes() const
{
#ifdef DEBUG
if (splines_.size() == 0) {
return;
}
const int layer_len = splines_.first()->attributes.data.totlayer;
Array<AttributeIDRef> ids_in_order(layer_len);
Array<AttributeMetaData> meta_data_in_order(layer_len);
{
int i = 0;
splines_.first()->attributes.foreach_attribute(
[&](const AttributeIDRef &attribute_id, const AttributeMetaData &meta_data) {
ids_in_order[i] = attribute_id;
meta_data_in_order[i] = meta_data;
i++;
return true;
},
ATTR_DOMAIN_POINT);
}
for (const SplinePtr &spline : splines_) {
/* All splines should have the same number of attributes. */
BLI_assert(spline->attributes.data.totlayer == layer_len);
int i = 0;
spline->attributes.foreach_attribute(
[&](const AttributeIDRef &attribute_id, const AttributeMetaData &meta_data) {
/* Attribute names and IDs should have the same order and exist on all splines. */
BLI_assert(attribute_id == ids_in_order[i]);
/* Attributes with the same ID different splines should all have the same type. */
BLI_assert(meta_data == meta_data_in_order[i]);
i++;
return true;
},
ATTR_DOMAIN_POINT);
}
#endif
}
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