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test2/source/blender/modifiers/intern/MOD_solidify_extrude.cc
Campbell Barton e955c94ed3 License Headers: Set copyright to "Blender Authors", add AUTHORS 
Listing the "Blender Foundation" as copyright holder implied the Blender
Foundation holds copyright to files which may include work from many
developers.

While keeping copyright on headers makes sense for isolated libraries,
Blender's own code may be refactored or moved between files in a way
that makes the per file copyright holders less meaningful.

Copyright references to the "Blender Foundation" have been replaced with
"Blender Authors", with the exception of `./extern/` since these this
contains libraries which are more isolated, any changed to license
headers there can be handled on a case-by-case basis.

Some directories in `./intern/` have also been excluded:

- `./intern/cycles/` it's own `AUTHORS` file is planned.
- `./intern/opensubdiv/`.

An "AUTHORS" file has been added, using the chromium projects authors
file as a template.

Design task: #110784

Ref !110783.
2023-08-16 00:20:26 +10:00

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/* SPDX-FileCopyrightText: 2023 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup modifiers
*/
#include "BLI_math_vector.h"
#include "BLI_utildefines.h"
#include "BLI_bitmap.h"
#include "BLI_math_geom.h"
#include "BLI_utildefines_stack.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "MEM_guardedalloc.h"
#include "BKE_deform.h"
#include "BKE_mesh.hh"
#include "BKE_particle.h"
#include "MOD_modifiertypes.hh"
#include "MOD_solidify_util.hh" /* own include */
#include "MOD_util.hh"
/* -------------------------------------------------------------------- */
/** \name High Quality Normal Calculation Function
* \{ */
/* skip shell thickness for non-manifold edges, see #35710. */
#define USE_NONMANIFOLD_WORKAROUND
/* *** derived mesh high quality normal calculation function *** */
/* could be exposed for other functions to use */
struct EdgeFaceRef {
int p1; /* init as -1 */
int p2;
};
BLI_INLINE bool edgeref_is_init(const EdgeFaceRef *edge_ref)
{
return !((edge_ref->p1 == 0) && (edge_ref->p2 == 0));
}
/**
* \param mesh: Mesh to calculate normals for.
* \param face_normals: Precalculated face normals.
* \param r_vert_nors: Return vert normals.
*/
static void mesh_calc_hq_normal(Mesh *mesh,
const blender::Span<blender::float3> face_normals,
float (*r_vert_nors)[3],
#ifdef USE_NONMANIFOLD_WORKAROUND
BLI_bitmap *edge_tmp_tag
#endif
)
{
const int verts_num = mesh->totvert;
const blender::Span<blender::int2> edges = mesh->edges();
const blender::OffsetIndices faces = mesh->faces();
const blender::Span<int> corner_edges = mesh->corner_edges();
{
EdgeFaceRef *edge_ref_array = MEM_cnew_array<EdgeFaceRef>(size_t(edges.size()), __func__);
EdgeFaceRef *edge_ref;
float edge_normal[3];
/* Add an edge reference if it's not there, pointing back to the face index. */
for (const int i : faces.index_range()) {
for (const int edge_i : corner_edges.slice(faces[i])) {
/* --- add edge ref to face --- */
edge_ref = &edge_ref_array[edge_i];
if (!edgeref_is_init(edge_ref)) {
edge_ref->p1 = i;
edge_ref->p2 = -1;
}
else if ((edge_ref->p1 != -1) && (edge_ref->p2 == -1)) {
edge_ref->p2 = i;
}
else {
/* 3+ faces using an edge, we can't handle this usefully */
edge_ref->p1 = edge_ref->p2 = -1;
#ifdef USE_NONMANIFOLD_WORKAROUND
BLI_BITMAP_ENABLE(edge_tmp_tag, edge_i);
#endif
}
/* --- done --- */
}
}
int i;
const blender::int2 *edge;
for (i = 0, edge = edges.data(), edge_ref = edge_ref_array; i < edges.size();
i++, edge++, edge_ref++)
{
/* Get the edge vert indices, and edge value (the face indices that use it) */
if (edgeref_is_init(edge_ref) && (edge_ref->p1 != -1)) {
if (edge_ref->p2 != -1) {
/* We have 2 faces using this edge, calculate the edges normal
* using the angle between the 2 faces as a weighting */
#if 0
add_v3_v3v3(edge_normal, face_nors[edge_ref->f1], face_nors[edge_ref->f2]);
normalize_v3_length(
edge_normal,
angle_normalized_v3v3(face_nors[edge_ref->f1], face_nors[edge_ref->f2]));
#else
mid_v3_v3v3_angle_weighted(
edge_normal, face_normals[edge_ref->p1], face_normals[edge_ref->p2]);
#endif
}
else {
/* only one face attached to that edge */
/* an edge without another attached- the weight on this is undefined */
copy_v3_v3(edge_normal, face_normals[edge_ref->p1]);
}
add_v3_v3(r_vert_nors[(*edge)[0]], edge_normal);
add_v3_v3(r_vert_nors[(*edge)[1]], edge_normal);
}
}
MEM_freeN(edge_ref_array);
}
/* normalize vertex normals and assign */
const blender::Span<blender::float3> vert_normals = mesh->vert_normals();
for (int i = 0; i < verts_num; i++) {
if (normalize_v3(r_vert_nors[i]) == 0.0f) {
copy_v3_v3(r_vert_nors[i], vert_normals[i]);
}
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Main Solidify Function
* \{ */
/* NOLINTNEXTLINE: readability-function-size */
Mesh *MOD_solidify_extrude_modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *mesh)
{
Mesh *result;
const SolidifyModifierData *smd = (SolidifyModifierData *)md;
const uint verts_num = uint(mesh->totvert);
const uint edges_num = uint(mesh->totedge);
const uint faces_num = uint(mesh->faces_num);
const uint loops_num = uint(mesh->totloop);
uint newLoops = 0, newPolys = 0, newEdges = 0, newVerts = 0, rimVerts = 0;
/* Only use material offsets if we have 2 or more materials. */
const short mat_nr_max = ctx->object->totcol > 1 ? ctx->object->totcol - 1 : 0;
const short mat_ofs = mat_nr_max ? smd->mat_ofs : 0;
const short mat_ofs_rim = mat_nr_max ? smd->mat_ofs_rim : 0;
/* use for edges */
/* Over-allocate new_vert_arr, old_vert_arr. */
uint *new_vert_arr = nullptr;
STACK_DECLARE(new_vert_arr);
uint *new_edge_arr = nullptr;
STACK_DECLARE(new_edge_arr);
uint *old_vert_arr = MEM_cnew_array<uint>(verts_num, "old_vert_arr in solidify");
uint *edge_users = nullptr;
int *edge_order = nullptr;
float(*vert_nors)[3] = nullptr;
blender::Span<blender::float3> face_normals;
const bool need_face_normals = (smd->flag & MOD_SOLIDIFY_NORMAL_CALC) ||
(smd->flag & MOD_SOLIDIFY_EVEN) ||
(smd->flag & MOD_SOLIDIFY_OFFSET_ANGLE_CLAMP) ||
(smd->bevel_convex != 0);
const float ofs_orig = -(((-smd->offset_fac + 1.0f) * 0.5f) * smd->offset);
const float ofs_new = smd->offset + ofs_orig;
const float offset_fac_vg = smd->offset_fac_vg;
const float offset_fac_vg_inv = 1.0f - smd->offset_fac_vg;
const float bevel_convex = smd->bevel_convex;
const bool do_flip = (smd->flag & MOD_SOLIDIFY_FLIP) != 0;
const bool do_clamp = (smd->offset_clamp != 0.0f);
const bool do_angle_clamp = do_clamp && (smd->flag & MOD_SOLIDIFY_OFFSET_ANGLE_CLAMP) != 0;
const bool do_bevel_convex = bevel_convex != 0.0f;
const bool do_rim = (smd->flag & MOD_SOLIDIFY_RIM) != 0;
const bool do_shell = !(do_rim && (smd->flag & MOD_SOLIDIFY_NOSHELL) != 0);
/* weights */
const MDeformVert *dvert;
const bool defgrp_invert = (smd->flag & MOD_SOLIDIFY_VGROUP_INV) != 0;
int defgrp_index;
const int shell_defgrp_index = BKE_id_defgroup_name_index(&mesh->id, smd->shell_defgrp_name);
const int rim_defgrp_index = BKE_id_defgroup_name_index(&mesh->id, smd->rim_defgrp_name);
/* array size is doubled in case of using a shell */
const uint stride = do_shell ? 2 : 1;
const blender::Span<blender::float3> vert_normals = mesh->vert_normals();
MOD_get_vgroup(ctx->object, mesh, smd->defgrp_name, &dvert, &defgrp_index);
const blender::Span<blender::float3> orig_vert_positions = mesh->vert_positions();
const blender::Span<blender::int2> orig_edges = mesh->edges();
const blender::OffsetIndices orig_faces = mesh->faces();
const blender::Span<int> orig_corner_verts = mesh->corner_verts();
const blender::Span<int> orig_corner_edges = mesh->corner_edges();
if (need_face_normals) {
/* calculate only face normals */
face_normals = mesh->face_normals();
}
STACK_INIT(new_vert_arr, verts_num * 2);
STACK_INIT(new_edge_arr, edges_num * 2);
if (do_rim) {
BLI_bitmap *orig_mvert_tag = BLI_BITMAP_NEW(verts_num, __func__);
uint eidx;
uint i;
#define INVALID_UNUSED uint(-1)
#define INVALID_PAIR uint(-2)
new_vert_arr = static_cast<uint *>(
MEM_malloc_arrayN(verts_num, 2 * sizeof(*new_vert_arr), __func__));
new_edge_arr = static_cast<uint *>(
MEM_malloc_arrayN(((edges_num * 2) + verts_num), sizeof(*new_edge_arr), __func__));
edge_users = static_cast<uint *>(MEM_malloc_arrayN(edges_num, sizeof(*edge_users), __func__));
edge_order = static_cast<int *>(MEM_malloc_arrayN(edges_num, sizeof(*edge_order), __func__));
/* save doing 2 loops here... */
#if 0
copy_vn_i(edge_users, edges_num, INVALID_UNUSED);
#endif
for (eidx = 0; eidx < edges_num; eidx++) {
edge_users[eidx] = INVALID_UNUSED;
}
for (const int64_t i : orig_faces.index_range()) {
const blender::IndexRange face = orig_faces[i];
int j;
int corner_i_prev = face.last();
for (j = 0; j < face.size(); j++) {
const int corner_i = face[j];
const int vert_i = orig_corner_verts[corner_i];
const int prev_vert_i = orig_corner_verts[corner_i_prev];
/* add edge user */
eidx = int(orig_corner_edges[corner_i_prev]);
if (edge_users[eidx] == INVALID_UNUSED) {
const blender::int2 &edge = orig_edges[eidx];
BLI_assert(ELEM(prev_vert_i, edge[0], edge[1]) && ELEM(vert_i, edge[0], edge[1]));
edge_users[eidx] = (prev_vert_i > vert_i) == (edge[0] < edge[1]) ? uint(i) :
(uint(i) + faces_num);
edge_order[eidx] = j;
}
else {
edge_users[eidx] = INVALID_PAIR;
}
corner_i_prev = corner_i;
}
}
for (eidx = 0; eidx < edges_num; eidx++) {
if (!ELEM(edge_users[eidx], INVALID_UNUSED, INVALID_PAIR)) {
BLI_BITMAP_ENABLE(orig_mvert_tag, orig_edges[eidx][0]);
BLI_BITMAP_ENABLE(orig_mvert_tag, orig_edges[eidx][1]);
STACK_PUSH(new_edge_arr, eidx);
newPolys++;
newLoops += 4;
}
}
for (i = 0; i < verts_num; i++) {
if (BLI_BITMAP_TEST(orig_mvert_tag, i)) {
old_vert_arr[i] = STACK_SIZE(new_vert_arr);
STACK_PUSH(new_vert_arr, i);
rimVerts++;
}
else {
old_vert_arr[i] = INVALID_UNUSED;
}
}
MEM_freeN(orig_mvert_tag);
}
if (do_shell == false) {
/* only add rim vertices */
newVerts = rimVerts;
/* each extruded face needs an opposite edge */
newEdges = newPolys;
}
else {
/* (stride == 2) in this case, so no need to add newVerts/newEdges */
BLI_assert(newVerts == 0);
BLI_assert(newEdges == 0);
}
#ifdef USE_NONMANIFOLD_WORKAROUND
BLI_bitmap *edge_tmp_tag = BLI_BITMAP_NEW(mesh->totedge, __func__);
#endif
if (smd->flag & MOD_SOLIDIFY_NORMAL_CALC) {
vert_nors = static_cast<float(*)[3]>(MEM_calloc_arrayN(verts_num, sizeof(float[3]), __func__));
mesh_calc_hq_normal(mesh,
face_normals,
vert_nors
#ifdef USE_NONMANIFOLD_WORKAROUND
,
edge_tmp_tag
#endif
);
}
result = BKE_mesh_new_nomain_from_template(mesh,
int((verts_num * stride) + newVerts),
int((edges_num * stride) + newEdges + rimVerts),
int((faces_num * stride) + newPolys),
int((loops_num * stride) + newLoops));
blender::MutableSpan<blender::float3> vert_positions = result->vert_positions_for_write();
blender::MutableSpan<blender::int2> edges = result->edges_for_write();
blender::MutableSpan<int> face_offsets = result->face_offsets_for_write();
blender::MutableSpan<int> corner_verts = result->corner_verts_for_write();
blender::MutableSpan<int> corner_edges = result->corner_edges_for_write();
if (do_shell) {
CustomData_copy_data(&mesh->vert_data, &result->vert_data, 0, 0, int(verts_num));
CustomData_copy_data(&mesh->vert_data, &result->vert_data, 0, int(verts_num), int(verts_num));
CustomData_copy_data(&mesh->edge_data, &result->edge_data, 0, 0, int(edges_num));
CustomData_copy_data(&mesh->edge_data, &result->edge_data, 0, int(edges_num), int(edges_num));
CustomData_copy_data(&mesh->loop_data, &result->loop_data, 0, 0, int(loops_num));
/* DO NOT copy here the 'copied' part of loop data, we want to reverse loops
* (so that winding of copied face get reversed, so that normals get reversed
* and point in expected direction...).
* If we also copy data here, then this data get overwritten
* (and allocated memory becomes a memory leak). */
CustomData_copy_data(&mesh->face_data, &result->face_data, 0, 0, int(faces_num));
CustomData_copy_data(&mesh->face_data, &result->face_data, 0, int(faces_num), int(faces_num));
face_offsets.take_front(faces_num).copy_from(mesh->face_offsets().drop_back(1));
for (const int i : orig_faces.index_range()) {
face_offsets[faces_num + i] = orig_faces[i].start() + mesh->totloop;
}
}
else {
int i, j;
CustomData_copy_data(&mesh->vert_data, &result->vert_data, 0, 0, int(verts_num));
for (i = 0, j = int(verts_num); i < verts_num; i++) {
if (old_vert_arr[i] != INVALID_UNUSED) {
CustomData_copy_data(&mesh->vert_data, &result->vert_data, i, j, 1);
j++;
}
}
CustomData_copy_data(&mesh->edge_data, &result->edge_data, 0, 0, int(edges_num));
for (i = 0, j = int(edges_num); i < edges_num; i++) {
if (!ELEM(edge_users[i], INVALID_UNUSED, INVALID_PAIR)) {
blender::int2 *ed_src, *ed_dst;
CustomData_copy_data(&mesh->edge_data, &result->edge_data, i, j, 1);
ed_src = &edges[i];
ed_dst = &edges[j];
(*ed_dst)[0] = old_vert_arr[(*ed_src)[0]] + verts_num;
(*ed_dst)[1] = old_vert_arr[(*ed_src)[1]] + verts_num;
j++;
}
}
/* will be created later */
CustomData_copy_data(&mesh->loop_data, &result->loop_data, 0, 0, int(loops_num));
CustomData_copy_data(&mesh->face_data, &result->face_data, 0, 0, int(faces_num));
face_offsets.take_front(faces_num).copy_from(mesh->face_offsets().drop_back(1));
}
float *result_edge_bweight = nullptr;
if (do_bevel_convex) {
result_edge_bweight = static_cast<float *>(CustomData_add_layer_named(
&result->edge_data, CD_PROP_FLOAT, CD_SET_DEFAULT, result->totedge, "bevel_weight_edge"));
}
/* Initializes: (`i_end`, `do_shell_align`, `vert_index`). */
#define INIT_VERT_ARRAY_OFFSETS(test) \
if (((ofs_new >= ofs_orig) == do_flip) == test) { \
i_end = verts_num; \
do_shell_align = true; \
vert_index = 0; \
} \
else { \
if (do_shell) { \
i_end = verts_num; \
do_shell_align = true; \
} \
else { \
i_end = newVerts; \
do_shell_align = false; \
} \
vert_index = verts_num; \
} \
(void)0
int *dst_material_index = BKE_mesh_material_indices_for_write(result);
/* flip normals */
if (do_shell) {
for (const int64_t i : blender::IndexRange(mesh->faces_num)) {
const blender::IndexRange face = orig_faces[i];
const int loop_end = face.size() - 1;
int e;
int j;
/* reverses the loop direction (corner verts as well as custom-data)
* Corner edges also need to be corrected too, done in a separate loop below. */
const int corner_2 = face.start() + mesh->totloop;
#if 0
for (j = 0; j < face.size(); j++) {
CustomData_copy_data(&mesh->ldata,
&result->ldata,
face.start() + j,
face.start() + (loop_end - j) + mesh->totloop,
1);
}
#else
/* slightly more involved, keep the first vertex the same for the copy,
* ensures the diagonals in the new face match the original. */
j = 0;
for (int j_prev = loop_end; j < face.size(); j_prev = j++) {
CustomData_copy_data(&mesh->loop_data,
&result->loop_data,
face.start() + j,
face.start() + (loop_end - j_prev) + mesh->totloop,
1);
}
#endif
if (mat_ofs) {
dst_material_index[faces_num + i] += mat_ofs;
CLAMP(dst_material_index[faces_num + i], 0, mat_nr_max);
}
e = corner_edges[corner_2 + 0];
for (j = 0; j < loop_end; j++) {
corner_edges[corner_2 + j] = corner_edges[corner_2 + j + 1];
}
corner_edges[corner_2 + loop_end] = e;
for (j = 0; j < face.size(); j++) {
corner_verts[corner_2 + j] += verts_num;
corner_edges[corner_2 + j] += edges_num;
}
}
for (blender::int2 &edge : edges.slice(edges_num, edges_num)) {
edge += verts_num;
}
}
/* NOTE: copied vertex layers don't have flipped normals yet. do this after applying offset. */
if ((smd->flag & MOD_SOLIDIFY_EVEN) == 0) {
/* no even thickness, very simple */
float ofs_new_vgroup;
/* for clamping */
float *vert_lens = nullptr;
float *vert_angs = nullptr;
const float offset = fabsf(smd->offset) * smd->offset_clamp;
const float offset_sq = offset * offset;
/* for bevel weight */
float *edge_angs = nullptr;
if (do_clamp) {
vert_lens = static_cast<float *>(MEM_malloc_arrayN(verts_num, sizeof(float), "vert_lens"));
copy_vn_fl(vert_lens, int(verts_num), FLT_MAX);
for (uint i = 0; i < edges_num; i++) {
const float ed_len_sq = len_squared_v3v3(vert_positions[edges[i][0]],
vert_positions[edges[i][1]]);
vert_lens[edges[i][0]] = min_ff(vert_lens[edges[i][0]], ed_len_sq);
vert_lens[edges[i][1]] = min_ff(vert_lens[edges[i][1]], ed_len_sq);
}
}
if (do_angle_clamp || do_bevel_convex) {
uint eidx;
if (do_angle_clamp) {
vert_angs = static_cast<float *>(MEM_malloc_arrayN(verts_num, sizeof(float), "vert_angs"));
copy_vn_fl(vert_angs, int(verts_num), 0.5f * M_PI);
}
if (do_bevel_convex) {
edge_angs = static_cast<float *>(MEM_malloc_arrayN(edges_num, sizeof(float), "edge_angs"));
if (!do_rim) {
edge_users = static_cast<uint *>(
MEM_malloc_arrayN(edges_num, sizeof(*edge_users), "solid_mod edges"));
}
}
uint(*edge_user_pairs)[2] = static_cast<uint(*)[2]>(
MEM_malloc_arrayN(edges_num, sizeof(*edge_user_pairs), "edge_user_pairs"));
for (eidx = 0; eidx < edges_num; eidx++) {
edge_user_pairs[eidx][0] = INVALID_UNUSED;
edge_user_pairs[eidx][1] = INVALID_UNUSED;
}
for (const int64_t i : orig_faces.index_range()) {
const blender::IndexRange face = orig_faces[i];
int prev_corner_i = face.last();
for (const int corner_i : face) {
const int vert_i = orig_corner_verts[corner_i];
const int prev_vert_i = orig_corner_verts[prev_corner_i];
/* add edge user */
eidx = orig_corner_edges[prev_corner_i];
const blender::int2 &ed = orig_edges[eidx];
BLI_assert(ELEM(prev_vert_i, ed[0], ed[1]) && ELEM(vert_i, ed[0], ed[1]));
char flip = char((prev_vert_i > vert_i) == (ed[0] < ed[1]));
if (edge_user_pairs[eidx][flip] == INVALID_UNUSED) {
edge_user_pairs[eidx][flip] = uint(i);
}
else {
edge_user_pairs[eidx][0] = INVALID_PAIR;
edge_user_pairs[eidx][1] = INVALID_PAIR;
}
prev_corner_i = corner_i;
}
}
float e[3];
for (uint i = 0; i < edges_num; i++) {
const blender::int2 &edge = orig_edges[i];
if (!ELEM(edge_user_pairs[i][0], INVALID_UNUSED, INVALID_PAIR) &&
!ELEM(edge_user_pairs[i][1], INVALID_UNUSED, INVALID_PAIR))
{
const float *n0 = face_normals[edge_user_pairs[i][0]];
const float *n1 = face_normals[edge_user_pairs[i][1]];
sub_v3_v3v3(e, orig_vert_positions[edge[0]], orig_vert_positions[edge[1]]);
normalize_v3(e);
const float angle = angle_signed_on_axis_v3v3_v3(n0, n1, e);
if (do_angle_clamp) {
vert_angs[edge[0]] = max_ff(vert_angs[edge[0]], angle);
vert_angs[edge[1]] = max_ff(vert_angs[edge[1]], angle);
}
if (do_bevel_convex) {
edge_angs[i] = angle;
if (!do_rim) {
edge_users[i] = INVALID_PAIR;
}
}
}
}
MEM_freeN(edge_user_pairs);
}
if (ofs_new != 0.0f) {
uint i_orig, i_end;
bool do_shell_align;
ofs_new_vgroup = ofs_new;
uint vert_index;
INIT_VERT_ARRAY_OFFSETS(false);
for (i_orig = 0; i_orig < i_end; i_orig++, vert_index++) {
const uint i = do_shell_align ? i_orig : new_vert_arr[i_orig];
if (dvert) {
const MDeformVert *dv = &dvert[i];
if (defgrp_invert) {
ofs_new_vgroup = 1.0f - BKE_defvert_find_weight(dv, defgrp_index);
}
else {
ofs_new_vgroup = BKE_defvert_find_weight(dv, defgrp_index);
}
ofs_new_vgroup = (offset_fac_vg + (ofs_new_vgroup * offset_fac_vg_inv)) * ofs_new;
}
if (do_clamp && offset > FLT_EPSILON) {
/* always reset because we may have set before */
if (dvert == nullptr) {
ofs_new_vgroup = ofs_new;
}
if (do_angle_clamp) {
float cos_ang = cosf(((2 * M_PI) - vert_angs[i]) * 0.5f);
if (cos_ang > 0) {
float max_off = sqrtf(vert_lens[i]) * 0.5f / cos_ang;
if (max_off < offset * 0.5f) {
ofs_new_vgroup *= max_off / offset * 2;
}
}
}
else {
if (vert_lens[i] < offset_sq) {
float scalar = sqrtf(vert_lens[i]) / offset;
ofs_new_vgroup *= scalar;
}
}
}
if (vert_nors) {
madd_v3_v3fl(vert_positions[vert_index], vert_nors[i], ofs_new_vgroup);
}
else {
madd_v3_v3fl(vert_positions[vert_index], vert_normals[i], ofs_new_vgroup);
}
}
}
if (ofs_orig != 0.0f) {
uint i_orig, i_end;
bool do_shell_align;
ofs_new_vgroup = ofs_orig;
/* as above but swapped */
uint vert_index;
INIT_VERT_ARRAY_OFFSETS(true);
for (i_orig = 0; i_orig < i_end; i_orig++, vert_index++) {
const uint i = do_shell_align ? i_orig : new_vert_arr[i_orig];
if (dvert) {
const MDeformVert *dv = &dvert[i];
if (defgrp_invert) {
ofs_new_vgroup = 1.0f - BKE_defvert_find_weight(dv, defgrp_index);
}
else {
ofs_new_vgroup = BKE_defvert_find_weight(dv, defgrp_index);
}
ofs_new_vgroup = (offset_fac_vg + (ofs_new_vgroup * offset_fac_vg_inv)) * ofs_orig;
}
if (do_clamp && offset > FLT_EPSILON) {
/* always reset because we may have set before */
if (dvert == nullptr) {
ofs_new_vgroup = ofs_orig;
}
if (do_angle_clamp) {
float cos_ang = cosf(vert_angs[i_orig] * 0.5f);
if (cos_ang > 0) {
float max_off = sqrtf(vert_lens[i]) * 0.5f / cos_ang;
if (max_off < offset * 0.5f) {
ofs_new_vgroup *= max_off / offset * 2;
}
}
}
else {
if (vert_lens[i] < offset_sq) {
float scalar = sqrtf(vert_lens[i]) / offset;
ofs_new_vgroup *= scalar;
}
}
}
if (vert_nors) {
madd_v3_v3fl(vert_positions[vert_index], vert_nors[i], ofs_new_vgroup);
}
else {
madd_v3_v3fl(vert_positions[vert_index], vert_normals[i], ofs_new_vgroup);
}
}
}
if (do_bevel_convex) {
for (uint i = 0; i < edges_num; i++) {
if (edge_users[i] == INVALID_PAIR) {
float angle = edge_angs[i];
result_edge_bweight[i] = clamp_f(result_edge_bweight[i] +
(angle < M_PI ? clamp_f(bevel_convex, 0.0f, 1.0f) :
clamp_f(bevel_convex, -1.0f, 0.0f)),
0.0f,
1.0f);
if (do_shell) {
result_edge_bweight[i + edges_num] = clamp_f(
result_edge_bweight[i + edges_num] + (angle > M_PI ?
clamp_f(bevel_convex, 0.0f, 1.0f) :
clamp_f(bevel_convex, -1.0f, 0.0f)),
0,
1.0f);
}
}
}
if (!do_rim) {
MEM_freeN(edge_users);
}
MEM_freeN(edge_angs);
}
if (do_clamp) {
MEM_freeN(vert_lens);
if (do_angle_clamp) {
MEM_freeN(vert_angs);
}
}
}
else {
#ifdef USE_NONMANIFOLD_WORKAROUND
const bool check_non_manifold = (smd->flag & MOD_SOLIDIFY_NORMAL_CALC) != 0;
#endif
/* same as EM_solidify() in editmesh_lib.c */
float *vert_angles = static_cast<float *>(
MEM_calloc_arrayN(verts_num, sizeof(float[2]), "mod_solid_pair")); /* 2 in 1 */
float *vert_accum = vert_angles + verts_num;
uint vidx;
uint i;
if (vert_nors == nullptr) {
vert_nors = static_cast<float(*)[3]>(
MEM_malloc_arrayN(verts_num, sizeof(float[3]), "mod_solid_vno"));
for (i = 0; i < verts_num; i++) {
copy_v3_v3(vert_nors[i], vert_normals[i]);
}
}
for (const int64_t i : blender::IndexRange(faces_num)) {
const blender::IndexRange face = orig_faces[i];
/* #bke::mesh::face_angles_calc logic is inlined here */
float nor_prev[3];
float nor_next[3];
int i_curr = face.size() - 1;
int i_next = 0;
const int *face_verts = &corner_verts[face.start()];
const int *face_edges = &corner_edges[face.start()];
sub_v3_v3v3(
nor_prev, vert_positions[face_verts[i_curr - 1]], vert_positions[face_verts[i_curr]]);
normalize_v3(nor_prev);
while (i_next < face.size()) {
float angle;
sub_v3_v3v3(
nor_next, vert_positions[face_verts[i_curr]], vert_positions[face_verts[i_next]]);
normalize_v3(nor_next);
angle = angle_normalized_v3v3(nor_prev, nor_next);
/* --- not related to angle calc --- */
if (angle < FLT_EPSILON) {
angle = FLT_EPSILON;
}
vidx = face_verts[i_curr];
vert_accum[vidx] += angle;
#ifdef USE_NONMANIFOLD_WORKAROUND
/* skip 3+ face user edges */
if ((check_non_manifold == false) ||
LIKELY(!BLI_BITMAP_TEST(edge_tmp_tag, face_edges[i_curr]) &&
!BLI_BITMAP_TEST(edge_tmp_tag, face_edges[i_next])))
{
vert_angles[vidx] += shell_v3v3_normalized_to_dist(vert_nors[vidx], face_normals[i]) *
angle;
}
else {
vert_angles[vidx] += angle;
}
#else
vert_angles[vidx] += shell_v3v3_normalized_to_dist(vert_nors[vidx], face_normals[i]) *
angle;
#endif
/* --- end non-angle-calc section --- */
/* step */
copy_v3_v3(nor_prev, nor_next);
i_curr = i_next;
i_next++;
}
}
/* vertex group support */
if (dvert) {
const MDeformVert *dv = dvert;
float scalar;
if (defgrp_invert) {
for (i = 0; i < verts_num; i++, dv++) {
scalar = 1.0f - BKE_defvert_find_weight(dv, defgrp_index);
scalar = offset_fac_vg + (scalar * offset_fac_vg_inv);
vert_angles[i] *= scalar;
}
}
else {
for (i = 0; i < verts_num; i++, dv++) {
scalar = BKE_defvert_find_weight(dv, defgrp_index);
scalar = offset_fac_vg + (scalar * offset_fac_vg_inv);
vert_angles[i] *= scalar;
}
}
}
/* for angle clamp */
float *vert_angs = nullptr;
/* for bevel convex */
float *edge_angs = nullptr;
if (do_angle_clamp || do_bevel_convex) {
uint eidx;
if (do_angle_clamp) {
vert_angs = static_cast<float *>(
MEM_malloc_arrayN(verts_num, sizeof(float), "vert_angs even"));
copy_vn_fl(vert_angs, int(verts_num), 0.5f * M_PI);
}
if (do_bevel_convex) {
edge_angs = static_cast<float *>(
MEM_malloc_arrayN(edges_num, sizeof(float), "edge_angs even"));
if (!do_rim) {
edge_users = static_cast<uint *>(
MEM_malloc_arrayN(edges_num, sizeof(*edge_users), "solid_mod edges"));
}
}
uint(*edge_user_pairs)[2] = static_cast<uint(*)[2]>(
MEM_malloc_arrayN(edges_num, sizeof(*edge_user_pairs), "edge_user_pairs"));
for (eidx = 0; eidx < edges_num; eidx++) {
edge_user_pairs[eidx][0] = INVALID_UNUSED;
edge_user_pairs[eidx][1] = INVALID_UNUSED;
}
for (const int i : orig_faces.index_range()) {
const blender::IndexRange face = orig_faces[i];
int prev_corner_i = face.start() + face.size() - 1;
for (int j = 0; j < face.size(); j++) {
const int corner_i = face.start() + j;
const int vert_i = orig_corner_verts[corner_i];
const int prev_vert_i = orig_corner_verts[prev_corner_i];
/* add edge user */
eidx = orig_corner_edges[prev_corner_i];
const blender::int2 &edge = orig_edges[eidx];
BLI_assert(ELEM(prev_vert_i, edge[0], edge[1]) && ELEM(vert_i, edge[0], edge[1]));
char flip = char((prev_vert_i > vert_i) == (edge[0] < edge[1]));
if (edge_user_pairs[eidx][flip] == INVALID_UNUSED) {
edge_user_pairs[eidx][flip] = uint(i);
}
else {
edge_user_pairs[eidx][0] = INVALID_PAIR;
edge_user_pairs[eidx][1] = INVALID_PAIR;
}
prev_corner_i = corner_i;
}
}
float e[3];
for (i = 0; i < edges_num; i++) {
const blender::int2 &edge = orig_edges[i];
if (!ELEM(edge_user_pairs[i][0], INVALID_UNUSED, INVALID_PAIR) &&
!ELEM(edge_user_pairs[i][1], INVALID_UNUSED, INVALID_PAIR))
{
const float *n0 = face_normals[edge_user_pairs[i][0]];
const float *n1 = face_normals[edge_user_pairs[i][1]];
if (do_angle_clamp) {
const float angle = M_PI - angle_normalized_v3v3(n0, n1);
vert_angs[edge[0]] = max_ff(vert_angs[edge[0]], angle);
vert_angs[edge[1]] = max_ff(vert_angs[edge[1]], angle);
}
if (do_bevel_convex) {
sub_v3_v3v3(e, orig_vert_positions[edge[0]], orig_vert_positions[edge[1]]);
normalize_v3(e);
edge_angs[i] = angle_signed_on_axis_v3v3_v3(n0, n1, e);
if (!do_rim) {
edge_users[i] = INVALID_PAIR;
}
}
}
}
MEM_freeN(edge_user_pairs);
}
if (do_clamp) {
const float clamp_fac = 1 + (do_angle_clamp ? fabsf(smd->offset_fac) : 0);
const float offset = fabsf(smd->offset) * smd->offset_clamp * clamp_fac;
if (offset > FLT_EPSILON) {
float *vert_lens_sq = static_cast<float *>(
MEM_malloc_arrayN(verts_num, sizeof(float), "vert_lens_sq"));
const float offset_sq = offset * offset;
copy_vn_fl(vert_lens_sq, int(verts_num), FLT_MAX);
for (i = 0; i < edges_num; i++) {
const float ed_len = len_squared_v3v3(vert_positions[edges[i][0]],
vert_positions[edges[i][1]]);
vert_lens_sq[edges[i][0]] = min_ff(vert_lens_sq[edges[i][0]], ed_len);
vert_lens_sq[edges[i][1]] = min_ff(vert_lens_sq[edges[i][1]], ed_len);
}
if (do_angle_clamp) {
for (i = 0; i < verts_num; i++) {
float cos_ang = cosf(vert_angs[i] * 0.5f);
if (cos_ang > 0) {
float max_off = sqrtf(vert_lens_sq[i]) * 0.5f / cos_ang;
if (max_off < offset * 0.5f) {
vert_angles[i] *= max_off / offset * 2;
}
}
}
MEM_freeN(vert_angs);
}
else {
for (i = 0; i < verts_num; i++) {
if (vert_lens_sq[i] < offset_sq) {
float scalar = sqrtf(vert_lens_sq[i]) / offset;
vert_angles[i] *= scalar;
}
}
}
MEM_freeN(vert_lens_sq);
}
}
if (do_bevel_convex) {
for (i = 0; i < edges_num; i++) {
if (edge_users[i] == INVALID_PAIR) {
float angle = edge_angs[i];
result_edge_bweight[i] = clamp_f(result_edge_bweight[i] +
(angle < M_PI ? clamp_f(bevel_convex, 0.0f, 1.0f) :
clamp_f(bevel_convex, -1.0f, 0.0f)),
0.0f,
1.0f);
if (do_shell) {
result_edge_bweight[i + edges_num] = clamp_f(
result_edge_bweight[i + edges_num] +
(angle > M_PI ? clamp_f(bevel_convex, 0, 1) : clamp_f(bevel_convex, -1, 0)),
0.0f,
1.0f);
}
}
}
if (!do_rim) {
MEM_freeN(edge_users);
}
MEM_freeN(edge_angs);
}
#undef INVALID_UNUSED
#undef INVALID_PAIR
if (ofs_new != 0.0f) {
uint i_orig, i_end;
bool do_shell_align;
uint vert_index;
INIT_VERT_ARRAY_OFFSETS(false);
for (i_orig = 0; i_orig < i_end; i_orig++, vert_index++) {
const uint i_other = do_shell_align ? i_orig : new_vert_arr[i_orig];
if (vert_accum[i_other]) { /* zero if unselected */
madd_v3_v3fl(vert_positions[vert_index],
vert_nors[i_other],
ofs_new * (vert_angles[i_other] / vert_accum[i_other]));
}
}
}
if (ofs_orig != 0.0f) {
uint i_orig, i_end;
bool do_shell_align;
/* same as above but swapped, intentional use of 'ofs_new' */
uint vert_index;
INIT_VERT_ARRAY_OFFSETS(true);
for (i_orig = 0; i_orig < i_end; i_orig++, vert_index++) {
const uint i_other = do_shell_align ? i_orig : new_vert_arr[i_orig];
if (vert_accum[i_other]) { /* zero if unselected */
madd_v3_v3fl(vert_positions[vert_index],
vert_nors[i_other],
ofs_orig * (vert_angles[i_other] / vert_accum[i_other]));
}
}
}
MEM_freeN(vert_angles);
}
#ifdef USE_NONMANIFOLD_WORKAROUND
MEM_SAFE_FREE(edge_tmp_tag);
#endif
if (vert_nors) {
MEM_freeN(vert_nors);
}
/* must recalculate normals with vgroups since they can displace unevenly #26888. */
if (BKE_mesh_vert_normals_are_dirty(mesh) || do_rim || dvert) {
/* Pass. */
}
else if (do_shell) {
uint i;
/* flip vertex normals for copied verts */
for (i = 0; i < verts_num; i++) {
negate_v3((float *)&vert_normals[i].x);
}
}
/* Add vertex weights for rim and shell vgroups. */
if (shell_defgrp_index != -1 || rim_defgrp_index != -1) {
MDeformVert *dst_dvert = BKE_mesh_deform_verts_for_write(result);
/* Ultimate security check. */
if (dst_dvert != nullptr) {
if (rim_defgrp_index != -1) {
for (uint i = 0; i < rimVerts; i++) {
BKE_defvert_ensure_index(&dst_dvert[new_vert_arr[i]], rim_defgrp_index)->weight = 1.0f;
BKE_defvert_ensure_index(&dst_dvert[(do_shell ? new_vert_arr[i] : i) + verts_num],
rim_defgrp_index)
->weight = 1.0f;
}
}
if (shell_defgrp_index != -1) {
for (uint i = verts_num; i < result->totvert; i++) {
BKE_defvert_ensure_index(&dst_dvert[i], shell_defgrp_index)->weight = 1.0f;
}
}
}
}
if (do_rim) {
uint i;
/* NOTE(@ideasman42): Unfortunately re-calculate the normals for the new edge
* faces is necessary. This could be done in many ways, but probably the quickest
* way is to calculate the average normals for side faces only.
* Then blend them with the normals of the edge verts.
*
* At the moment its easiest to allocate an entire array for every vertex,
* even though we only need edge verts. */
#define SOLIDIFY_SIDE_NORMALS
#ifdef SOLIDIFY_SIDE_NORMALS
/* NOTE(@sybren): due to the code setting normals dirty a few lines above,
* do_side_normals is always false. */
const bool do_side_normals = !BKE_mesh_vert_normals_are_dirty(result);
/* annoying to allocate these since we only need the edge verts, */
float(*edge_vert_nos)[3] = do_side_normals ? static_cast<float(*)[3]>(MEM_calloc_arrayN(
verts_num, sizeof(float[3]), __func__)) :
nullptr;
float nor[3];
#endif
const float crease_rim = smd->crease_rim;
const float crease_outer = smd->crease_outer;
const float crease_inner = smd->crease_inner;
int *origindex_edge;
int *orig_ed;
uint j;
float *result_edge_crease = nullptr;
if (crease_rim || crease_outer || crease_inner) {
result_edge_crease = (float *)CustomData_add_layer_named(
&result->edge_data, CD_PROP_FLOAT, CD_SET_DEFAULT, result->totedge, "crease_edge");
}
/* add faces & edges */
origindex_edge = static_cast<int *>(
CustomData_get_layer_for_write(&result->edge_data, CD_ORIGINDEX, result->totedge));
orig_ed = (origindex_edge) ? &origindex_edge[(edges_num * stride) + newEdges] : nullptr;
/* Start after copied edges. */
int new_edge_index = int(edges_num * stride + newEdges);
for (i = 0; i < rimVerts; i++) {
edges[new_edge_index][0] = new_vert_arr[i];
edges[new_edge_index][1] = (do_shell ? new_vert_arr[i] : i) + verts_num;
if (orig_ed) {
*orig_ed = ORIGINDEX_NONE;
orig_ed++;
}
if (crease_rim) {
result_edge_crease[new_edge_index] = crease_rim;
}
new_edge_index++;
}
/* faces */
int new_face_index = int(faces_num * stride);
blender::MutableSpan<int> new_corner_verts = corner_verts.drop_front(loops_num * stride);
blender::MutableSpan<int> new_corner_edges = corner_edges.drop_front(loops_num * stride);
j = 0;
for (i = 0; i < newPolys; i++) {
uint eidx = new_edge_arr[i];
uint pidx = edge_users[eidx];
int k1, k2;
bool flip;
if (pidx >= faces_num) {
pidx -= faces_num;
flip = true;
}
else {
flip = false;
}
const blender::int2 &edge = edges[eidx];
/* copy most of the face settings */
CustomData_copy_data(
&mesh->face_data, &result->face_data, int(pidx), int((faces_num * stride) + i), 1);
const int old_face_size = orig_faces[pidx].size();
face_offsets[new_face_index] = int(j + (loops_num * stride));
/* prev loop */
k1 = face_offsets[pidx] + (((edge_order[eidx] - 1) + old_face_size) % old_face_size);
k2 = face_offsets[pidx] + (edge_order[eidx]);
CustomData_copy_data(
&mesh->loop_data, &result->loop_data, k2, int((loops_num * stride) + j + 0), 1);
CustomData_copy_data(
&mesh->loop_data, &result->loop_data, k1, int((loops_num * stride) + j + 1), 1);
CustomData_copy_data(
&mesh->loop_data, &result->loop_data, k1, int((loops_num * stride) + j + 2), 1);
CustomData_copy_data(
&mesh->loop_data, &result->loop_data, k2, int((loops_num * stride) + j + 3), 1);
if (flip == false) {
new_corner_verts[j] = edge[0];
new_corner_edges[j++] = eidx;
new_corner_verts[j] = edge[1];
new_corner_edges[j++] = (edges_num * stride) + old_vert_arr[edge[1]] + newEdges;
new_corner_verts[j] = (do_shell ? edge[1] : old_vert_arr[edge[1]]) + verts_num;
new_corner_edges[j++] = (do_shell ? eidx : i) + edges_num;
new_corner_verts[j] = (do_shell ? edge[0] : old_vert_arr[edge[0]]) + verts_num;
new_corner_edges[j++] = (edges_num * stride) + old_vert_arr[edge[0]] + newEdges;
}
else {
new_corner_verts[j] = edge[1];
new_corner_edges[j++] = eidx;
new_corner_verts[j] = edge[0];
new_corner_edges[j++] = (edges_num * stride) + old_vert_arr[edge[0]] + newEdges;
new_corner_verts[j] = (do_shell ? edge[0] : old_vert_arr[edge[0]]) + verts_num;
new_corner_edges[j++] = (do_shell ? eidx : i) + edges_num;
new_corner_verts[j] = (do_shell ? edge[1] : old_vert_arr[edge[1]]) + verts_num;
new_corner_edges[j++] = (edges_num * stride) + old_vert_arr[edge[1]] + newEdges;
}
if (origindex_edge) {
origindex_edge[new_corner_edges[j - 3]] = ORIGINDEX_NONE;
origindex_edge[new_corner_edges[j - 1]] = ORIGINDEX_NONE;
}
/* use the next material index if option enabled */
if (mat_ofs_rim) {
dst_material_index[new_face_index] += mat_ofs_rim;
CLAMP(dst_material_index[new_face_index], 0, mat_nr_max);
}
if (crease_outer) {
/* crease += crease_outer; without wrapping */
float *cr = &(result_edge_crease[eidx]);
float tcr = *cr + crease_outer;
*cr = tcr > 1.0f ? 1.0f : tcr;
}
if (crease_inner) {
/* crease += crease_inner; without wrapping */
float *cr = &(result_edge_crease[edges_num + (do_shell ? eidx : i)]);
float tcr = *cr + crease_inner;
*cr = tcr > 1.0f ? 1.0f : tcr;
}
#ifdef SOLIDIFY_SIDE_NORMALS
if (do_side_normals) {
normal_quad_v3(nor,
vert_positions[new_corner_verts[j - 4]],
vert_positions[new_corner_verts[j - 3]],
vert_positions[new_corner_verts[j - 2]],
vert_positions[new_corner_verts[j - 1]]);
add_v3_v3(edge_vert_nos[edge[0]], nor);
add_v3_v3(edge_vert_nos[edge[1]], nor);
}
#endif
new_face_index++;
}
#ifdef SOLIDIFY_SIDE_NORMALS
if (do_side_normals) {
for (i = 0; i < rimVerts; i++) {
const blender::int2 &edge_orig = edges[i];
const blender::int2 &edge = edges[edges_num * stride + i];
float nor_cpy[3];
int k;
/* NOTE: only the first vertex (lower half of the index) is calculated. */
BLI_assert(edge[0] < verts_num);
normalize_v3_v3(nor_cpy, edge_vert_nos[edge_orig[0]]);
for (k = 0; k < 2; k++) { /* loop over both verts of the edge */
copy_v3_v3(nor, vert_normals[*(&edge[0] + k)]);
add_v3_v3(nor, nor_cpy);
normalize_v3(nor);
copy_v3_v3((float *)&vert_normals[*(&edge[0] + k)].x, nor);
}
}
MEM_freeN(edge_vert_nos);
}
#endif
MEM_freeN(new_vert_arr);
MEM_freeN(new_edge_arr);
MEM_freeN(edge_users);
MEM_freeN(edge_order);
}
if (old_vert_arr) {
MEM_freeN(old_vert_arr);
}
return result;
}
#undef SOLIDIFY_SIDE_NORMALS
/** \} */
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