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test/source/blender/modifiers/intern/MOD_weighted_normal.cc
Hans Goudey 7966cd16d6 Mesh: Replace MPoly struct with offset indices 
Implements #95967.

Currently the `MPoly` struct is 12 bytes, and stores the index of a
face's first corner and the number of corners/verts/edges. Polygons
and corners are always created in order by Blender, meaning each
face's corners will be after the previous face's corners. We can take
advantage of this fact and eliminate the redundancy in mesh face
storage by only storing a single integer corner offset for each face.
The size of the face is then encoded by the offset of the next face.
The size of a single integer is 4 bytes, so this reduces memory
usage by 3 times.

The same method is used for `CurvesGeometry`, so Blender already has
an abstraction to simplify using these offsets called `OffsetIndices`.
This class is used to easily retrieve a range of corner indices for
each face. This also gives the opportunity for sharing some logic with
curves.

Another benefit of the change is that the offsets and sizes stored in
`MPoly` can no longer disagree with each other. Storing faces in the
order of their corners can simplify some code too.

Face/polygon variables now use the `IndexRange` type, which comes with
quite a few utilities that can simplify code.

Some:
- The offset integer array has to be one longer than the face count to
  avoid a branch for every face, which means the data is no longer part
  of the mesh's `CustomData`.
- We lose the ability to "reference" an original mesh's offset array
  until more reusable CoW from #104478 is committed. That will be added
  in a separate commit.
- Since they aren't part of `CustomData`, poly offsets often have to be
  copied manually.
- To simplify using `OffsetIndices` in many places, some functions and
  structs in headers were moved to only compile in C++.
- All meshes created by Blender use the same order for faces and face
  corners, but just in case, meshes with mismatched order are fixed by
  versioning code.
- `MeshPolygon.totloop` is no longer editable in RNA. This API break is
  necessary here unfortunately. It should be worth it in 3.6, since
  that's the best way to allow loading meshes from 4.0, which is
  important for an LTS version.

Pull Request: https://projects.blender.org/blender/blender/pulls/105938
2023-04-04 20:39:28 +02:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup modifiers
*/
#include "MEM_guardedalloc.h"
#include "BLI_bitmap.h"
#include "BLI_linklist.h"
#include "BLI_math_vector.h"
#include "BLT_translation.h"
#include "DNA_defaults.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "BKE_attribute.hh"
#include "BKE_context.h"
#include "BKE_deform.h"
#include "BKE_lib_id.h"
#include "BKE_mesh.hh"
#include "BKE_mesh_mapping.h"
#include "BKE_screen.h"
#include "UI_interface.h"
#include "UI_resources.h"
#include "RNA_access.h"
#include "RNA_prototypes.h"
#include "MOD_modifiertypes.h"
#include "MOD_ui_common.h"
#include "MOD_util.h"
#include "bmesh.h"
#define CLNORS_VALID_VEC_LEN (1e-6f)
struct ModePair {
float val; /* Contains mode based value (face area / corner angle). */
int index; /* Index value per poly or per loop. */
};
/* Sorting function used in modifier, sorts in decreasing order. */
static int modepair_cmp_by_val_inverse(const void *p1, const void *p2)
{
ModePair *r1 = (ModePair *)p1;
ModePair *r2 = (ModePair *)p2;
return (r1->val < r2->val) ? 1 : ((r1->val > r2->val) ? -1 : 0);
}
/* There will be one of those per vertex
* (simple case, computing one normal per vertex), or per smooth fan. */
struct WeightedNormalDataAggregateItem {
float normal[3];
int loops_num; /* Count number of loops using this item so far. */
float curr_val; /* Current max val for this item. */
int curr_strength; /* Current max strength encountered for this item. */
};
#define NUM_CACHED_INVERSE_POWERS_OF_WEIGHT 128
struct WeightedNormalData {
int verts_num;
blender::Span<blender::float3> vert_positions;
blender::Span<blender::float3> vert_normals;
blender::Span<MEdge> edges;
blender::MutableSpan<bool> sharp_edges;
blender::Span<int> corner_verts;
blender::Span<int> corner_edges;
blender::Span<int> loop_to_poly;
short (*clnors)[2];
bool has_clnors; /* True if clnors already existed, false if we had to create them. */
float split_angle;
blender::OffsetIndices<int> polys;
blender::Span<blender::float3> poly_normals;
const bool *sharp_faces;
const int *poly_strength;
const MDeformVert *dvert;
int defgrp_index;
bool use_invert_vgroup;
float weight;
short mode;
/* Lower-level, internal processing data. */
float cached_inverse_powers_of_weight[NUM_CACHED_INVERSE_POWERS_OF_WEIGHT];
WeightedNormalDataAggregateItem *items_data;
ModePair *mode_pair;
};
/**
* Check strength of given poly compared to those found so far for that given item
* (vertex or smooth fan), and reset matching item_data in case we get a stronger new strength.
*/
static bool check_item_poly_strength(WeightedNormalData *wn_data,
WeightedNormalDataAggregateItem *item_data,
const int poly_index)
{
BLI_assert(wn_data->poly_strength != nullptr);
const int mp_strength = wn_data->poly_strength[poly_index];
if (mp_strength > item_data->curr_strength) {
item_data->curr_strength = mp_strength;
item_data->curr_val = 0.0f;
item_data->loops_num = 0;
zero_v3(item_data->normal);
}
return mp_strength == item_data->curr_strength;
}
static void aggregate_item_normal(WeightedNormalModifierData *wnmd,
WeightedNormalData *wn_data,
WeightedNormalDataAggregateItem *item_data,
const int mv_index,
const int poly_index,
const float curr_val,
const bool use_face_influence)
{
const blender::Span<blender::float3> poly_normals = wn_data->poly_normals;
const MDeformVert *dvert = wn_data->dvert;
const int defgrp_index = wn_data->defgrp_index;
const bool use_invert_vgroup = wn_data->use_invert_vgroup;
const float weight = wn_data->weight;
float *cached_inverse_powers_of_weight = wn_data->cached_inverse_powers_of_weight;
const bool has_vgroup = dvert != nullptr;
const bool vert_of_group = has_vgroup &&
BKE_defvert_find_index(&dvert[mv_index], defgrp_index) != nullptr;
if (has_vgroup &&
((vert_of_group && use_invert_vgroup) || (!vert_of_group && !use_invert_vgroup))) {
return;
}
if (use_face_influence && !check_item_poly_strength(wn_data, item_data, poly_index)) {
return;
}
/* If item's curr_val is 0 init it to present value. */
if (item_data->curr_val == 0.0f) {
item_data->curr_val = curr_val;
}
if (!compare_ff(item_data->curr_val, curr_val, wnmd->thresh)) {
/* item's curr_val and present value differ more than threshold, update. */
item_data->loops_num++;
item_data->curr_val = curr_val;
}
/* Exponentially divided weight for each normal
* (since a few values will be used by most cases, we cache those). */
const int loops_num = item_data->loops_num;
if (loops_num < NUM_CACHED_INVERSE_POWERS_OF_WEIGHT &&
cached_inverse_powers_of_weight[loops_num] == 0.0f) {
cached_inverse_powers_of_weight[loops_num] = 1.0f / powf(weight, loops_num);
}
const float inverted_n_weight = loops_num < NUM_CACHED_INVERSE_POWERS_OF_WEIGHT ?
cached_inverse_powers_of_weight[loops_num] :
1.0f / powf(weight, loops_num);
madd_v3_v3fl(item_data->normal, poly_normals[poly_index], curr_val * inverted_n_weight);
}
static void apply_weights_vertex_normal(WeightedNormalModifierData *wnmd,
WeightedNormalData *wn_data)
{
using namespace blender;
const int verts_num = wn_data->verts_num;
const blender::Span<blender::float3> positions = wn_data->vert_positions;
const blender::Span<MEdge> edges = wn_data->edges;
const blender::OffsetIndices polys = wn_data->polys;
const blender::Span<int> corner_verts = wn_data->corner_verts;
const blender::Span<int> corner_edges = wn_data->corner_edges;
short(*clnors)[2] = wn_data->clnors;
const blender::Span<int> loop_to_poly = wn_data->loop_to_poly;
const blender::Span<blender::float3> poly_normals = wn_data->poly_normals;
const int *poly_strength = wn_data->poly_strength;
const MDeformVert *dvert = wn_data->dvert;
const short mode = wn_data->mode;
ModePair *mode_pair = wn_data->mode_pair;
const bool has_clnors = wn_data->has_clnors;
const float split_angle = wn_data->split_angle;
MLoopNorSpaceArray lnors_spacearr = {nullptr};
const bool keep_sharp = (wnmd->flag & MOD_WEIGHTEDNORMAL_KEEP_SHARP) != 0;
const bool use_face_influence = (wnmd->flag & MOD_WEIGHTEDNORMAL_FACE_INFLUENCE) != 0 &&
poly_strength != nullptr;
const bool has_vgroup = dvert != nullptr;
blender::Array<blender::float3> loop_normals;
WeightedNormalDataAggregateItem *items_data = nullptr;
int items_num = 0;
if (keep_sharp) {
BLI_bitmap *done_loops = BLI_BITMAP_NEW(corner_verts.size(), __func__);
/* This will give us loop normal spaces,
* we do not actually care about computed loop_normals for now... */
loop_normals.reinitialize(corner_verts.size());
bke::mesh::normals_calc_loop(positions,
edges,
polys,
corner_verts,
corner_edges,
loop_to_poly,
wn_data->vert_normals,
wn_data->poly_normals,
wn_data->sharp_edges.data(),
wn_data->sharp_faces,
true,
split_angle,
has_clnors ? clnors : nullptr,
&lnors_spacearr,
loop_normals);
items_num = lnors_spacearr.spaces_num;
items_data = static_cast<WeightedNormalDataAggregateItem *>(
MEM_calloc_arrayN(size_t(items_num), sizeof(*items_data), __func__));
/* In this first loop, we assign each WeightedNormalDataAggregateItem
* to its smooth fan of loops (aka lnor space). */
int item_index = 0;
for (const int i : polys.index_range()) {
for (const int ml_index : polys[i]) {
if (BLI_BITMAP_TEST(done_loops, ml_index)) {
/* Smooth fan of this loop has already been processed, skip it. */
continue;
}
WeightedNormalDataAggregateItem *itdt = &items_data[item_index];
itdt->curr_strength = FACE_STRENGTH_WEAK;
MLoopNorSpace *lnor_space = lnors_spacearr.lspacearr[ml_index];
lnor_space->user_data = itdt;
if (!(lnor_space->flags & MLNOR_SPACE_IS_SINGLE)) {
for (LinkNode *lnode = lnor_space->loops; lnode; lnode = lnode->next) {
const int ml_fan_index = POINTER_AS_INT(lnode->link);
BLI_BITMAP_ENABLE(done_loops, ml_fan_index);
}
}
else {
BLI_BITMAP_ENABLE(done_loops, ml_index);
}
item_index++;
}
}
MEM_freeN(done_loops);
}
else {
items_num = verts_num;
items_data = static_cast<WeightedNormalDataAggregateItem *>(
MEM_calloc_arrayN(size_t(items_num), sizeof(*items_data), __func__));
if (use_face_influence) {
for (int item_index = 0; item_index < items_num; item_index++) {
items_data[item_index].curr_strength = FACE_STRENGTH_WEAK;
}
}
}
wn_data->items_data = items_data;
switch (mode) {
case MOD_WEIGHTEDNORMAL_MODE_FACE:
for (const int i : polys.index_range()) {
const int poly_index = mode_pair[i].index;
const float mp_val = mode_pair[i].val;
for (const int ml_index : polys[poly_index]) {
const int mv_index = corner_verts[ml_index];
WeightedNormalDataAggregateItem *item_data =
keep_sharp ? static_cast<WeightedNormalDataAggregateItem *>(
lnors_spacearr.lspacearr[ml_index]->user_data) :
&items_data[mv_index];
aggregate_item_normal(
wnmd, wn_data, item_data, mv_index, poly_index, mp_val, use_face_influence);
}
}
break;
case MOD_WEIGHTEDNORMAL_MODE_ANGLE:
case MOD_WEIGHTEDNORMAL_MODE_FACE_ANGLE:
for (int i = 0; i < corner_verts.size(); i++) {
const int ml_index = mode_pair[i].index;
const float ml_val = mode_pair[i].val;
const int poly_index = loop_to_poly[ml_index];
const int mv_index = corner_verts[ml_index];
WeightedNormalDataAggregateItem *item_data =
keep_sharp ? static_cast<WeightedNormalDataAggregateItem *>(
lnors_spacearr.lspacearr[ml_index]->user_data) :
&items_data[mv_index];
aggregate_item_normal(
wnmd, wn_data, item_data, mv_index, poly_index, ml_val, use_face_influence);
}
break;
default:
BLI_assert_unreachable();
}
/* Validate computed weighted normals. */
for (int item_index = 0; item_index < items_num; item_index++) {
if (normalize_v3(items_data[item_index].normal) < CLNORS_VALID_VEC_LEN) {
zero_v3(items_data[item_index].normal);
}
}
if (keep_sharp) {
/* Set loop normals for normal computed for each lnor space (smooth fan).
* Note that loop_normals is already populated with clnors
* (before this modifier is applied, at start of this function),
* so no need to recompute them here. */
for (int ml_index = 0; ml_index < corner_verts.size(); ml_index++) {
WeightedNormalDataAggregateItem *item_data = static_cast<WeightedNormalDataAggregateItem *>(
lnors_spacearr.lspacearr[ml_index]->user_data);
if (!is_zero_v3(item_data->normal)) {
copy_v3_v3(loop_normals[ml_index], item_data->normal);
}
}
blender::bke::mesh::normals_loop_custom_set(positions,
edges,
polys,
corner_verts,
corner_edges,
wn_data->vert_normals,
poly_normals,
wn_data->sharp_faces,
wn_data->sharp_edges,
loop_normals,
clnors);
}
else {
/* TODO: Ideally, we could add an option to `BKE_mesh_normals_loop_custom_[from_verts_]set()`
* to keep current clnors instead of resetting them to default auto-computed ones,
* when given new custom normal is zero-vec.
* But this is not exactly trivial change, better to keep this optimization for later...
*/
if (!has_vgroup) {
/* NOTE: in theory, we could avoid this extra allocation & copying...
* But think we can live with it for now,
* and it makes code simpler & cleaner. */
blender::Array<blender::float3> vert_normals(verts_num, float3(0));
for (int ml_index = 0; ml_index < corner_verts.size(); ml_index++) {
const int mv_index = corner_verts[ml_index];
copy_v3_v3(vert_normals[mv_index], items_data[mv_index].normal);
}
blender::bke::mesh::normals_loop_custom_set_from_verts(positions,
edges,
polys,
corner_verts,
corner_edges,
wn_data->vert_normals,
poly_normals,
wn_data->sharp_faces,
wn_data->sharp_edges,
vert_normals,
clnors);
}
else {
loop_normals.reinitialize(corner_verts.size());
blender::bke::mesh::normals_calc_loop(positions,
edges,
polys,
corner_verts,
corner_edges,
loop_to_poly,
wn_data->vert_normals,
poly_normals,
wn_data->sharp_edges.data(),
wn_data->sharp_faces,
true,
split_angle,
has_clnors ? clnors : nullptr,
nullptr,
loop_normals);
for (int ml_index = 0; ml_index < corner_verts.size(); ml_index++) {
const int item_index = corner_verts[ml_index];
if (!is_zero_v3(items_data[item_index].normal)) {
copy_v3_v3(loop_normals[ml_index], items_data[item_index].normal);
}
}
blender::bke::mesh::normals_loop_custom_set(positions,
edges,
polys,
corner_verts,
corner_edges,
wn_data->vert_normals,
poly_normals,
wn_data->sharp_faces,
wn_data->sharp_edges,
loop_normals,
clnors);
}
}
if (keep_sharp) {
BKE_lnor_spacearr_free(&lnors_spacearr);
}
}
static void wn_face_area(WeightedNormalModifierData *wnmd, WeightedNormalData *wn_data)
{
const blender::Span<blender::float3> positions = wn_data->vert_positions;
const blender::OffsetIndices polys = wn_data->polys;
const blender::Span<int> corner_verts = wn_data->corner_verts;
ModePair *face_area = static_cast<ModePair *>(
MEM_malloc_arrayN(polys.size(), sizeof(*face_area), __func__));
ModePair *f_area = face_area;
for (const int i : polys.index_range()) {
f_area[i].val = blender::bke::mesh::poly_area_calc(positions, corner_verts.slice(polys[i]));
f_area[i].index = i;
}
qsort(face_area, polys.size(), sizeof(*face_area), modepair_cmp_by_val_inverse);
wn_data->mode_pair = face_area;
apply_weights_vertex_normal(wnmd, wn_data);
}
static void wn_corner_angle(WeightedNormalModifierData *wnmd, WeightedNormalData *wn_data)
{
const blender::Span<blender::float3> positions = wn_data->vert_positions;
const blender::OffsetIndices polys = wn_data->polys;
const blender::Span<int> corner_verts = wn_data->corner_verts;
ModePair *corner_angle = static_cast<ModePair *>(
MEM_malloc_arrayN(corner_verts.size(), sizeof(*corner_angle), __func__));
for (const int i : polys.index_range()) {
const blender::IndexRange poly = polys[i];
float *index_angle = static_cast<float *>(
MEM_malloc_arrayN(poly.size(), sizeof(*index_angle), __func__));
blender::bke::mesh::poly_angles_calc(
positions, corner_verts.slice(poly), {index_angle, poly.size()});
ModePair *c_angl = &corner_angle[poly.start()];
float *angl = index_angle;
for (int ml_index = poly.start(); ml_index < poly.start() + poly.size();
ml_index++, c_angl++, angl++) {
c_angl->val = float(M_PI) - *angl;
c_angl->index = ml_index;
}
MEM_freeN(index_angle);
}
qsort(corner_angle, corner_verts.size(), sizeof(*corner_angle), modepair_cmp_by_val_inverse);
wn_data->mode_pair = corner_angle;
apply_weights_vertex_normal(wnmd, wn_data);
}
static void wn_face_with_angle(WeightedNormalModifierData *wnmd, WeightedNormalData *wn_data)
{
const blender::Span<blender::float3> positions = wn_data->vert_positions;
const blender::OffsetIndices polys = wn_data->polys;
const blender::Span<int> corner_verts = wn_data->corner_verts;
ModePair *combined = static_cast<ModePair *>(
MEM_malloc_arrayN(corner_verts.size(), sizeof(*combined), __func__));
for (const int i : polys.index_range()) {
const blender::IndexRange poly = polys[i];
const blender::Span<int> poly_verts = corner_verts.slice(poly);
const float face_area = blender::bke::mesh::poly_area_calc(positions, poly_verts);
float *index_angle = static_cast<float *>(
MEM_malloc_arrayN(size_t(poly.size()), sizeof(*index_angle), __func__));
blender::bke::mesh::poly_angles_calc(positions, poly_verts, {index_angle, poly.size()});
ModePair *cmbnd = &combined[poly.start()];
float *angl = index_angle;
for (int ml_index = poly.start(); ml_index < poly.start() + poly.size();
ml_index++, cmbnd++, angl++) {
/* In this case val is product of corner angle and face area. */
cmbnd->val = (float(M_PI) - *angl) * face_area;
cmbnd->index = ml_index;
}
MEM_freeN(index_angle);
}
qsort(combined, corner_verts.size(), sizeof(*combined), modepair_cmp_by_val_inverse);
wn_data->mode_pair = combined;
apply_weights_vertex_normal(wnmd, wn_data);
}
static Mesh *modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *mesh)
{
using namespace blender;
WeightedNormalModifierData *wnmd = (WeightedNormalModifierData *)md;
Object *ob = ctx->object;
/* XXX TODO(Rohan Rathi):
* Once we fully switch to Mesh evaluation of modifiers,
* we can expect to get that flag from the COW copy.
* But for now, it is lost in the DM intermediate step,
* so we need to directly check orig object's data. */
#if 0
if (!(mesh->flag & ME_AUTOSMOOTH))
#else
if (!(((Mesh *)ob->data)->flag & ME_AUTOSMOOTH))
#endif
{
BKE_modifier_set_error(
ctx->object, (ModifierData *)wnmd, "Enable 'Auto Smooth' in Object Data Properties");
return mesh;
}
Mesh *result;
result = (Mesh *)BKE_id_copy_ex(nullptr, &mesh->id, nullptr, LIB_ID_COPY_LOCALIZE);
const int verts_num = result->totvert;
const blender::Span<blender::float3> positions = mesh->vert_positions();
const blender::Span<MEdge> edges = mesh->edges();
const OffsetIndices polys = result->polys();
const blender::Span<int> corner_verts = mesh->corner_verts();
const blender::Span<int> corner_edges = mesh->corner_edges();
/* Right now:
* If weight = 50 then all faces are given equal weight.
* If weight > 50 then more weight given to faces with larger vals (face area / corner angle).
* If weight < 50 then more weight given to faces with lesser vals. However current calculation
* does not converge to min/max.
*/
float weight = float(wnmd->weight) / 50.0f;
if (wnmd->weight == 100) {
weight = float(SHRT_MAX);
}
else if (wnmd->weight == 1) {
weight = 1 / float(SHRT_MAX);
}
else if ((weight - 1) * 25 > 1) {
weight = (weight - 1) * 25;
}
const float split_angle = mesh->smoothresh;
short(*clnors)[2] = static_cast<short(*)[2]>(
CustomData_get_layer_for_write(&result->ldata, CD_CUSTOMLOOPNORMAL, mesh->totloop));
/* Keep info whether we had clnors,
* it helps when generating clnor spaces and default normals. */
const bool has_clnors = clnors != nullptr;
if (!clnors) {
clnors = static_cast<short(*)[2]>(CustomData_add_layer(
&result->ldata, CD_CUSTOMLOOPNORMAL, CD_SET_DEFAULT, corner_verts.size()));
}
const MDeformVert *dvert;
int defgrp_index;
MOD_get_vgroup(ctx->object, mesh, wnmd->defgrp_name, &dvert, &defgrp_index);
const Array<int> loop_to_poly_map = bke::mesh_topology::build_loop_to_poly_map(result->polys());
bke::MutableAttributeAccessor attributes = result->attributes_for_write();
bke::SpanAttributeWriter<bool> sharp_edges = attributes.lookup_or_add_for_write_span<bool>(
"sharp_edge", ATTR_DOMAIN_EDGE);
WeightedNormalData wn_data{};
wn_data.verts_num = verts_num;
wn_data.vert_positions = positions;
wn_data.vert_normals = result->vert_normals();
wn_data.edges = edges;
wn_data.sharp_edges = sharp_edges.span;
wn_data.corner_verts = corner_verts;
wn_data.corner_edges = corner_edges;
wn_data.loop_to_poly = loop_to_poly_map;
wn_data.clnors = clnors;
wn_data.has_clnors = has_clnors;
wn_data.split_angle = split_angle;
wn_data.polys = polys;
wn_data.poly_normals = mesh->poly_normals();
wn_data.sharp_faces = static_cast<const bool *>(
CustomData_get_layer_named(&mesh->pdata, CD_PROP_BOOL, "sharp_face"));
wn_data.poly_strength = static_cast<const int *>(CustomData_get_layer_named(
&result->pdata, CD_PROP_INT32, MOD_WEIGHTEDNORMALS_FACEWEIGHT_CDLAYER_ID));
wn_data.dvert = dvert;
wn_data.defgrp_index = defgrp_index;
wn_data.use_invert_vgroup = (wnmd->flag & MOD_WEIGHTEDNORMAL_INVERT_VGROUP) != 0;
wn_data.weight = weight;
wn_data.mode = wnmd->mode;
switch (wnmd->mode) {
case MOD_WEIGHTEDNORMAL_MODE_FACE:
wn_face_area(wnmd, &wn_data);
break;
case MOD_WEIGHTEDNORMAL_MODE_ANGLE:
wn_corner_angle(wnmd, &wn_data);
break;
case MOD_WEIGHTEDNORMAL_MODE_FACE_ANGLE:
wn_face_with_angle(wnmd, &wn_data);
break;
}
MEM_SAFE_FREE(wn_data.mode_pair);
MEM_SAFE_FREE(wn_data.items_data);
result->runtime->is_original_bmesh = false;
sharp_edges.finish();
return result;
}
static void initData(ModifierData *md)
{
WeightedNormalModifierData *wnmd = (WeightedNormalModifierData *)md;
BLI_assert(MEMCMP_STRUCT_AFTER_IS_ZERO(wnmd, modifier));
MEMCPY_STRUCT_AFTER(wnmd, DNA_struct_default_get(WeightedNormalModifierData), modifier);
}
static void requiredDataMask(ModifierData *md, CustomData_MeshMasks *r_cddata_masks)
{
WeightedNormalModifierData *wnmd = (WeightedNormalModifierData *)md;
r_cddata_masks->lmask = CD_MASK_CUSTOMLOOPNORMAL;
if (wnmd->defgrp_name[0] != '\0') {
r_cddata_masks->vmask |= CD_MASK_MDEFORMVERT;
}
if (wnmd->flag & MOD_WEIGHTEDNORMAL_FACE_INFLUENCE) {
r_cddata_masks->pmask |= CD_MASK_PROP_INT32;
}
}
static bool dependsOnNormals(ModifierData * /*md*/)
{
return true;
}
static void panel_draw(const bContext * /*C*/, Panel *panel)
{
uiLayout *col;
uiLayout *layout = panel->layout;
PointerRNA ob_ptr;
PointerRNA *ptr = modifier_panel_get_property_pointers(panel, &ob_ptr);
uiLayoutSetPropSep(layout, true);
uiItemR(layout, ptr, "mode", 0, nullptr, ICON_NONE);
uiItemR(layout, ptr, "weight", 0, IFACE_("Weight"), ICON_NONE);
uiItemR(layout, ptr, "thresh", 0, IFACE_("Threshold"), ICON_NONE);
col = uiLayoutColumn(layout, false);
uiItemR(col, ptr, "keep_sharp", 0, nullptr, ICON_NONE);
uiItemR(col, ptr, "use_face_influence", 0, nullptr, ICON_NONE);
modifier_vgroup_ui(layout, ptr, &ob_ptr, "vertex_group", "invert_vertex_group", nullptr);
modifier_panel_end(layout, ptr);
}
static void panelRegister(ARegionType *region_type)
{
modifier_panel_register(region_type, eModifierType_WeightedNormal, panel_draw);
}
ModifierTypeInfo modifierType_WeightedNormal = {
/*name*/ N_("WeightedNormal"),
/*structName*/ "WeightedNormalModifierData",
/*structSize*/ sizeof(WeightedNormalModifierData),
/*srna*/ &RNA_WeightedNormalModifier,
/*type*/ eModifierTypeType_Constructive,
/*flags*/ eModifierTypeFlag_AcceptsMesh | eModifierTypeFlag_SupportsMapping |
eModifierTypeFlag_SupportsEditmode | eModifierTypeFlag_EnableInEditmode,
/*icon*/ ICON_MOD_NORMALEDIT,
/*copyData*/ BKE_modifier_copydata_generic,
/*deformVerts*/ nullptr,
/*deformMatrices*/ nullptr,
/*deformVertsEM*/ nullptr,
/*deformMatricesEM*/ nullptr,
/*modifyMesh*/ modifyMesh,
/*modifyGeometrySet*/ nullptr,
/*initData*/ initData,
/*requiredDataMask*/ requiredDataMask,
/*freeData*/ nullptr,
/*isDisabled*/ nullptr,
/*updateDepsgraph*/ nullptr,
/*dependsOnTime*/ nullptr,
/*dependsOnNormals*/ dependsOnNormals,
/*foreachIDLink*/ nullptr,
/*foreachTexLink*/ nullptr,
/*freeRuntimeData*/ nullptr,
/*panelRegister*/ panelRegister,
/*blendWrite*/ nullptr,
/*blendRead*/ nullptr,
};
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