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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2005 by the Blender Foundation.
* All rights reserved.
*
* Contributor(s): Daniel Dunbar
* Ton Roosendaal,
* Ben Batt,
* Brecht Van Lommel,
* Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*
*/
/** \file blender/modifiers/intern/MOD_mirror.c
* \ingroup modifiers
*/
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "BLI_math.h"
#include "BKE_library_query.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_deform.h"
#include "MEM_guardedalloc.h"
#include "DEG_depsgraph_build.h"
#include "MOD_modifiertypes.h"
static void initData(ModifierData *md)
{
MirrorModifierData *mmd = (MirrorModifierData *) md;
mmd->flag |= (MOD_MIR_AXIS_X | MOD_MIR_VGROUP);
mmd->tolerance = 0.001;
mmd->mirror_ob = NULL;
}
static void copyData(ModifierData *md, ModifierData *target)
{
#if 0
MirrorModifierData *mmd = (MirrorModifierData *) md;
MirrorModifierData *tmmd = (MirrorModifierData *) target;
#endif
modifier_copyData_generic(md, target);
}
static void foreachObjectLink(
ModifierData *md, Object *ob,
ObjectWalkFunc walk, void *userData)
{
MirrorModifierData *mmd = (MirrorModifierData *) md;
walk(userData, ob, &mmd->mirror_ob, IDWALK_CB_NOP);
}
static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphContext *ctx)
{
MirrorModifierData *mmd = (MirrorModifierData *)md;
if (mmd->mirror_ob != NULL) {
DEG_add_object_relation(ctx->node, mmd->mirror_ob, DEG_OB_COMP_TRANSFORM, "Mirror Modifier");
}
DEG_add_object_relation(ctx->node, ctx->object, DEG_OB_COMP_TRANSFORM, "Mirror Modifier");
}
static Mesh *doMirrorOnAxis(MirrorModifierData *mmd,
Object *ob,
const Mesh *mesh,
int axis)
{
const float tolerance_sq = mmd->tolerance * mmd->tolerance;
const bool do_vtargetmap = (mmd->flag & MOD_MIR_NO_MERGE) == 0;
int tot_vtargetmap = 0; /* total merge vertices */
Mesh *result;
const int maxVerts = mesh->totvert;
const int maxEdges = mesh->totedge;
const int maxLoops = mesh->totloop;
const int maxPolys = mesh->totpoly;
MVert *mv, *mv_prev;
MEdge *me;
MLoop *ml;
MPoly *mp;
float mtx[4][4];
int i;
int a, totshape;
int *vtargetmap = NULL, *vtmap_a = NULL, *vtmap_b = NULL;
/* mtx is the mirror transformation */
unit_m4(mtx);
mtx[axis][axis] = -1.0f;
if (mmd->mirror_ob) {
float tmp[4][4];
float itmp[4][4];
/* tmp is a transform from coords relative to the object's own origin,
* to coords relative to the mirror object origin */
invert_m4_m4(tmp, mmd->mirror_ob->obmat);
mul_m4_m4m4(tmp, tmp, ob->obmat);
/* itmp is the reverse transform back to origin-relative coordinates */
invert_m4_m4(itmp, tmp);
/* combine matrices to get a single matrix that translates coordinates into
* mirror-object-relative space, does the mirror, and translates back to
* origin-relative space */
mul_m4_m4m4(mtx, mtx, tmp);
mul_m4_m4m4(mtx, itmp, mtx);
}
result = BKE_mesh_from_template(mesh, maxVerts * 2, maxEdges * 2, 0, maxLoops * 2, maxPolys * 2);
/*copy customdata to original geometry*/
CustomData_copy_data(&mesh->vdata, &result->vdata, 0, 0, maxVerts);
CustomData_copy_data(&mesh->edata, &result->edata, 0, 0, maxEdges);
CustomData_copy_data(&mesh->ldata, &result->ldata, 0, 0, maxLoops);
CustomData_copy_data(&mesh->pdata, &result->pdata, 0, 0, maxPolys);
/* Subsurf for eg wont have mesh data in the custom data arrays.
* now add mvert/medge/mpoly layers. */
if (!CustomData_has_layer(&mesh->vdata, CD_MVERT)) {
memcpy(result->mvert, mesh->mvert, sizeof(*result->mvert) * mesh->totvert);
}
if (!CustomData_has_layer(&mesh->edata, CD_MEDGE)) {
memcpy(result->medge, mesh->medge, sizeof(*result->medge) * mesh->totedge);
}
if (!CustomData_has_layer(&mesh->pdata, CD_MPOLY)) {
memcpy(result->mloop, mesh->mloop, sizeof(*result->mloop) * mesh->totloop);
memcpy(result->mpoly, mesh->mpoly, sizeof(*result->mpoly) * mesh->totpoly);
}
/* copy customdata to new geometry,
* copy from its self because this data may have been created in the checks above */
CustomData_copy_data(&result->vdata, &result->vdata, 0, maxVerts, maxVerts);
CustomData_copy_data(&result->edata, &result->edata, 0, maxEdges, maxEdges);
/* loops are copied later */
CustomData_copy_data(&result->pdata, &result->pdata, 0, maxPolys, maxPolys);
if (do_vtargetmap) {
/* second half is filled with -1 */
vtargetmap = MEM_malloc_arrayN(maxVerts, 2 * sizeof(int), "MOD_mirror tarmap");
vtmap_a = vtargetmap;
vtmap_b = vtargetmap + maxVerts;
}
/* mirror vertex coordinates */
mv_prev = result->mvert;
mv = mv_prev + maxVerts;
for (i = 0; i < maxVerts; i++, mv++, mv_prev++) {
mul_m4_v3(mtx, mv->co);
if (do_vtargetmap) {
/* compare location of the original and mirrored vertex, to see if they
* should be mapped for merging */
if (UNLIKELY(len_squared_v3v3(mv_prev->co, mv->co) < tolerance_sq)) {
*vtmap_a = maxVerts + i;
tot_vtargetmap++;
/* average location */
mid_v3_v3v3(mv->co, mv_prev->co, mv->co);
copy_v3_v3(mv_prev->co, mv->co);
}
else {
*vtmap_a = -1;
}
*vtmap_b = -1; /* fill here to avoid 2x loops */
vtmap_a++;
vtmap_b++;
}
}
/* handle shape keys */
totshape = CustomData_number_of_layers(&result->vdata, CD_SHAPEKEY);
for (a = 0; a < totshape; a++) {
float (*cos)[3] = CustomData_get_layer_n(&result->vdata, CD_SHAPEKEY, a);
for (i = maxVerts; i < result->totvert; i++) {
mul_m4_v3(mtx, cos[i]);
}
}
/* adjust mirrored edge vertex indices */
me = result->medge + maxEdges;
for (i = 0; i < maxEdges; i++, me++) {
me->v1 += maxVerts;
me->v2 += maxVerts;
}
/* adjust mirrored poly loopstart indices, and reverse loop order (normals) */
mp = result->mpoly + maxPolys;
ml = result->mloop;
for (i = 0; i < maxPolys; i++, mp++) {
MLoop *ml2;
int j, e;
/* reverse the loop, but we keep the first vertex in the face the same,
* to ensure that quads are split the same way as on the other side */
CustomData_copy_data(&result->ldata, &result->ldata, mp->loopstart, mp->loopstart + maxLoops, 1);
for (j = 1; j < mp->totloop; j++)
CustomData_copy_data(&result->ldata, &result->ldata,
mp->loopstart + j,
mp->loopstart + maxLoops + mp->totloop - j,
1);
ml2 = ml + mp->loopstart + maxLoops;
e = ml2[0].e;
for (j = 0; j < mp->totloop - 1; j++) {
ml2[j].e = ml2[j + 1].e;
}
ml2[mp->totloop - 1].e = e;
mp->loopstart += maxLoops;
}
/* adjust mirrored loop vertex and edge indices */
ml = result->mloop + maxLoops;
for (i = 0; i < maxLoops; i++, ml++) {
ml->v += maxVerts;
ml->e += maxEdges;
}
/* handle uvs,
* let tessface recalc handle updating the MTFace data */
if (mmd->flag & (MOD_MIR_MIRROR_U | MOD_MIR_MIRROR_V) || (is_zero_v2(mmd->uv_offset_copy) == false)) {
const bool do_mirr_u = (mmd->flag & MOD_MIR_MIRROR_U) != 0;
const bool do_mirr_v = (mmd->flag & MOD_MIR_MIRROR_V) != 0;
const int totuv = CustomData_number_of_layers(&result->ldata, CD_MLOOPUV);
for (a = 0; a < totuv; a++) {
MLoopUV *dmloopuv = CustomData_get_layer_n(&result->ldata, CD_MLOOPUV, a);
int j = maxLoops;
dmloopuv += j; /* second set of loops only */
for (; j-- > 0; dmloopuv++) {
if (do_mirr_u) dmloopuv->uv[0] = 1.0f - dmloopuv->uv[0] + mmd->uv_offset[0];
if (do_mirr_v) dmloopuv->uv[1] = 1.0f - dmloopuv->uv[1] + mmd->uv_offset[1];
dmloopuv->uv[0] += mmd->uv_offset_copy[0];
dmloopuv->uv[1] += mmd->uv_offset_copy[1];
}
}
}
/* handle vgroup stuff */
if ((mmd->flag & MOD_MIR_VGROUP) && CustomData_has_layer(&result->vdata, CD_MDEFORMVERT)) {
MDeformVert *dvert = (MDeformVert *) CustomData_get_layer(&result->vdata, CD_MDEFORMVERT) + maxVerts;
int *flip_map = NULL, flip_map_len = 0;
flip_map = defgroup_flip_map(ob, &flip_map_len, false);
if (flip_map) {
for (i = 0; i < maxVerts; dvert++, i++) {
/* merged vertices get both groups, others get flipped */
if (do_vtargetmap && (vtargetmap[i] != -1))
defvert_flip_merged(dvert, flip_map, flip_map_len);
else
defvert_flip(dvert, flip_map, flip_map_len);
}
MEM_freeN(flip_map);
}
}
if (do_vtargetmap) {
/* slow - so only call if one or more merge verts are found,
* users may leave this on and not realize there is nothing to merge - campbell */
if (tot_vtargetmap) {
result = BKE_mesh_merge_verts(result, vtargetmap, tot_vtargetmap, MESH_MERGE_VERTS_DUMP_IF_MAPPED);
}
MEM_freeN(vtargetmap);
}
return result;
}
static Mesh *mirrorModifier__doMirror(MirrorModifierData *mmd,
Object *ob, Mesh *mesh)
{
Mesh *result = mesh;
/* check which axes have been toggled and mirror accordingly */
if (mmd->flag & MOD_MIR_AXIS_X) {
result = doMirrorOnAxis(mmd, ob, result, 0);
}
if (mmd->flag & MOD_MIR_AXIS_Y) {
Mesh *tmp = result;
result = doMirrorOnAxis(mmd, ob, result, 1);
if (tmp != mesh) {
/* free intermediate results */
BKE_mesh_free(tmp);
MEM_freeN(tmp);
}
}
if (mmd->flag & MOD_MIR_AXIS_Z) {
Mesh *tmp = result;
result = doMirrorOnAxis(mmd, ob, result, 2);
if (tmp != mesh) {
/* free intermediate results */
BKE_mesh_free(tmp);
MEM_freeN(tmp);
}
}
return result;
}
static Mesh *applyModifier(ModifierData *md, const ModifierEvalContext *ctx,
Mesh *mesh)
{
Mesh *result;
MirrorModifierData *mmd = (MirrorModifierData *) md;
result = mirrorModifier__doMirror(mmd, ctx->object, mesh);
BKE_mesh_calc_normals(result);
return result;
}
ModifierTypeInfo modifierType_Mirror = {
/* name */ "Mirror",
/* structName */ "MirrorModifierData",
/* structSize */ sizeof(MirrorModifierData),
/* type */ eModifierTypeType_Constructive,
/* flags */ eModifierTypeFlag_AcceptsMesh |
eModifierTypeFlag_SupportsMapping |
eModifierTypeFlag_SupportsEditmode |
eModifierTypeFlag_EnableInEditmode |
eModifierTypeFlag_AcceptsCVs |
/* this is only the case when 'MOD_MIR_VGROUP' is used */
eModifierTypeFlag_UsesPreview,
/* copyData */ copyData,
/* deformVerts_DM */ NULL,
/* deformMatrices_DM */ NULL,
/* deformVertsEM_DM */ NULL,
/* deformMatricesEM_DM*/NULL,
/* applyModifier_DM */ NULL,
/* applyModifierEM_DM */NULL,
/* deformVerts */ NULL,
/* deformMatrices */ NULL,
/* deformVertsEM */ NULL,
/* deformMatricesEM */ NULL,
/* applyModifier */ applyModifier,
/* applyModifierEM */ NULL,
/* initData */ initData,
/* requiredDataMask */ NULL,
/* freeData */ NULL,
/* isDisabled */ NULL,
/* updateDepsgraph */ updateDepsgraph,
/* dependsOnTime */ NULL,
/* dependsOnNormals */ NULL,
/* foreachObjectLink */ foreachObjectLink,
/* foreachIDLink */ NULL,
/* foreachTexLink */ NULL,
};
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