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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) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* Contributor(s): Jiri Hnidek <jiri.hnidek@vslib.cz>.
*
* ***** END GPL LICENSE BLOCK *****
*
* MetaBalls are created from a single Object (with a name without number in it),
* here the DispList and BoundBox also is located.
* All objects with the same name (but with a number in it) are added to this.
*
* texture coordinates are patched within the displist
*/
/** \file blender/blenkernel/intern/mball.c
* \ingroup bke
*/
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <ctype.h>
#include <float.h>
#include "MEM_guardedalloc.h"
#include "DNA_material_types.h"
#include "DNA_object_types.h"
#include "DNA_meta_types.h"
#include "DNA_scene_types.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_string_utils.h"
#include "BLI_utildefines.h"
#include "BKE_global.h"
#include "BKE_main.h"
#include "BKE_animsys.h"
#include "BKE_curve.h"
#include "BKE_scene.h"
#include "BKE_library.h"
#include "BKE_library_query.h"
#include "BKE_library_remap.h"
#include "BKE_displist.h"
#include "BKE_mball.h"
#include "BKE_object.h"
#include "BKE_material.h"
//#include "DEG_depsgraph.h"
/* Functions */
/** Free (or release) any data used by this mball (does not free the mball itself). */
void BKE_mball_free(MetaBall *mb)
{
BKE_animdata_free((ID *)mb, false);
MEM_SAFE_FREE(mb->mat);
BLI_freelistN(&mb->elems);
if (mb->disp.first) BKE_displist_free(&mb->disp);
}
void BKE_mball_init(MetaBall *mb)
{
BLI_assert(MEMCMP_STRUCT_OFS_IS_ZERO(mb, id));
mb->size[0] = mb->size[1] = mb->size[2] = 1.0;
mb->texflag = MB_AUTOSPACE;
mb->wiresize = 0.4f;
mb->rendersize = 0.2f;
mb->thresh = 0.6f;
}
MetaBall *BKE_mball_add(Main *bmain, const char *name)
{
MetaBall *mb;
mb = BKE_libblock_alloc(bmain, ID_MB, name, 0);
BKE_mball_init(mb);
return mb;
}
/**
* Only copy internal data of MetaBall ID from source to already allocated/initialized destination.
* You probably nerver want to use that directly, use id_copy or BKE_id_copy_ex for typical needs.
*
* WARNING! This function will not handle ID user count!
*
* \param flag Copying options (see BKE_library.h's LIB_ID_COPY_... flags for more).
*/
void BKE_mball_copy_data(Main *UNUSED(bmain), MetaBall *mb_dst, const MetaBall *mb_src, const int UNUSED(flag))
{
BLI_duplicatelist(&mb_dst->elems, &mb_src->elems);
mb_dst->mat = MEM_dupallocN(mb_src->mat);
mb_dst->editelems = NULL;
mb_dst->lastelem = NULL;
}
MetaBall *BKE_mball_copy(Main *bmain, const MetaBall *mb)
{
MetaBall *mb_copy;
BKE_id_copy_ex(bmain, &mb->id, (ID **)&mb_copy, 0, false);
return mb_copy;
}
void BKE_mball_make_local(Main *bmain, MetaBall *mb, const bool lib_local)
{
BKE_id_make_local_generic(bmain, &mb->id, true, lib_local);
}
/* most simple meta-element adding function
* don't do context manipulation here (rna uses) */
MetaElem *BKE_mball_element_add(MetaBall *mb, const int type)
{
MetaElem *ml = MEM_callocN(sizeof(MetaElem), "metaelem");
unit_qt(ml->quat);
ml->rad = 2.0;
ml->s = 2.0;
ml->flag = MB_SCALE_RAD;
switch (type) {
case MB_BALL:
ml->type = MB_BALL;
ml->expx = ml->expy = ml->expz = 1.0;
break;
case MB_TUBE:
ml->type = MB_TUBE;
ml->expx = ml->expy = ml->expz = 1.0;
break;
case MB_PLANE:
ml->type = MB_PLANE;
ml->expx = ml->expy = ml->expz = 1.0;
break;
case MB_ELIPSOID:
ml->type = MB_ELIPSOID;
ml->expx = 1.2f;
ml->expy = 0.8f;
ml->expz = 1.0;
break;
case MB_CUBE:
ml->type = MB_CUBE;
ml->expx = ml->expy = ml->expz = 1.0;
break;
default:
break;
}
BLI_addtail(&mb->elems, ml);
return ml;
}
/** Compute bounding box of all MetaElems/MetaBalls.
*
* Bounding box is computed from polygonized surface. Object *ob is
* basic MetaBall (usually with name Meta). All other MetaBalls (with
* names Meta.001, Meta.002, etc) are included in this Bounding Box.
*/
void BKE_mball_texspace_calc(Object *ob)
{
DispList *dl;
BoundBox *bb;
float *data, min[3], max[3] /*, loc[3], size[3] */;
int tot;
bool do_it = false;
if (ob->bb == NULL) ob->bb = MEM_callocN(sizeof(BoundBox), "mb boundbox");
bb = ob->bb;
/* Weird one, this. */
/* INIT_MINMAX(min, max); */
(min)[0] = (min)[1] = (min)[2] = 1.0e30f;
(max)[0] = (max)[1] = (max)[2] = -1.0e30f;
dl = ob->curve_cache->disp.first;
while (dl) {
tot = dl->nr;
if (tot) do_it = true;
data = dl->verts;
while (tot--) {
/* Also weird... but longer. From utildefines. */
minmax_v3v3_v3(min, max, data);
data += 3;
}
dl = dl->next;
}
if (!do_it) {
min[0] = min[1] = min[2] = -1.0f;
max[0] = max[1] = max[2] = 1.0f;
}
#if 0
loc[0] = (min[0] + max[0]) / 2.0f;
loc[1] = (min[1] + max[1]) / 2.0f;
loc[2] = (min[2] + max[2]) / 2.0f;
size[0] = (max[0] - min[0]) / 2.0f;
size[1] = (max[1] - min[1]) / 2.0f;
size[2] = (max[2] - min[2]) / 2.0f;
#endif
BKE_boundbox_init_from_minmax(bb, min, max);
bb->flag &= ~BOUNDBOX_DIRTY;
}
float *BKE_mball_make_orco(Object *ob, ListBase *dispbase)
{
BoundBox *bb;
DispList *dl;
float *data, *orco, *orcodata;
float loc[3], size[3];
int a;
/* restore size and loc */
bb = ob->bb;
loc[0] = (bb->vec[0][0] + bb->vec[4][0]) / 2.0f;
size[0] = bb->vec[4][0] - loc[0];
loc[1] = (bb->vec[0][1] + bb->vec[2][1]) / 2.0f;
size[1] = bb->vec[2][1] - loc[1];
loc[2] = (bb->vec[0][2] + bb->vec[1][2]) / 2.0f;
size[2] = bb->vec[1][2] - loc[2];
dl = dispbase->first;
orcodata = MEM_mallocN(sizeof(float) * 3 * dl->nr, "MballOrco");
data = dl->verts;
orco = orcodata;
a = dl->nr;
while (a--) {
orco[0] = (data[0] - loc[0]) / size[0];
orco[1] = (data[1] - loc[1]) / size[1];
orco[2] = (data[2] - loc[2]) / size[2];
data += 3;
orco += 3;
}
return orcodata;
}
/* Note on mball basis stuff 2.5x (this is a can of worms)
* This really needs a rewrite/refactor its totally broken in anything other then basic cases
* Multiple Scenes + Set Scenes & mixing mball basis SHOULD work but fails to update the depsgraph on rename
* and linking into scenes or removal of basis mball. so take care when changing this code.
*
* Main idiot thing here is that the system returns find_basis_mball() objects which fail a is_basis_mball() test.
*
* Not only that but the depsgraph and their areas depend on this behavior!, so making small fixes here isn't worth it.
* - Campbell
*/
/** \brief Test, if Object *ob is basic MetaBall.
*
* It test last character of Object ID name. If last character
* is digit it return 0, else it return 1.
*/
bool BKE_mball_is_basis(Object *ob)
{
/* just a quick test */
const int len = strlen(ob->id.name);
return (!isdigit(ob->id.name[len - 1]));
}
/* return nonzero if ob1 is a basis mball for ob */
bool BKE_mball_is_basis_for(Object *ob1, Object *ob2)
{
int basis1nr, basis2nr;
char basis1name[MAX_ID_NAME], basis2name[MAX_ID_NAME];
BLI_split_name_num(basis1name, &basis1nr, ob1->id.name + 2, '.');
BLI_split_name_num(basis2name, &basis2nr, ob2->id.name + 2, '.');
if (STREQ(basis1name, basis2name)) {
return BKE_mball_is_basis(ob1);
}
else {
return false;
}
}
/* \brief copy some properties from object to other metaball object with same base name
*
* When some properties (wiresize, threshold, update flags) of metaball are changed, then this properties
* are copied to all metaballs in same "group" (metaballs with same base name: MBall,
* MBall.001, MBall.002, etc). The most important is to copy properties to the base metaball,
* because this metaball influence polygonisation of metaballs. */
void BKE_mball_properties_copy(Scene *scene, Object *active_object)
{
Scene *sce_iter = scene;
Base *base;
Object *ob;
MetaBall *active_mball = (MetaBall *)active_object->data;
int basisnr, obnr;
char basisname[MAX_ID_NAME], obname[MAX_ID_NAME];
SceneBaseIter iter;
struct EvaluationContext *eval_ctx = G.main->eval_ctx;
BLI_split_name_num(basisname, &basisnr, active_object->id.name + 2, '.');
BKE_scene_base_iter_next(eval_ctx, &iter, &sce_iter, 0, NULL, NULL);
while (BKE_scene_base_iter_next(eval_ctx, &iter, &sce_iter, 1, &base, &ob)) {
if (ob->type == OB_MBALL) {
if (ob != active_object) {
BLI_split_name_num(obname, &obnr, ob->id.name + 2, '.');
/* Object ob has to be in same "group" ... it means, that it has to have
* same base of its name */
if (STREQ(obname, basisname)) {
MetaBall *mb = ob->data;
/* Copy properties from selected/edited metaball */
mb->wiresize = active_mball->wiresize;
mb->rendersize = active_mball->rendersize;
mb->thresh = active_mball->thresh;
mb->flag = active_mball->flag;
}
}
}
}
}
/** \brief This function finds basic MetaBall.
*
* Basic MetaBall doesn't include any number at the end of
* its name. All MetaBalls with same base of name can be
* blended. MetaBalls with different basic name can't be
* blended.
*
* warning!, is_basis_mball() can fail on returned object, see long note above.
*/
Object *BKE_mball_basis_find(Scene *scene, Object *basis)
{
Object *bob = basis;
int basisnr, obnr;
char basisname[MAX_ID_NAME], obname[MAX_ID_NAME];
BLI_split_name_num(basisname, &basisnr, basis->id.name + 2, '.');
for (SceneLayer *sl = scene->render_layers.first; sl; sl = sl->next) {
for (Base *base = sl->object_bases.first; base; base = base->next) {
Object *ob = base->object;
if ((ob->type == OB_MBALL) && !(base->flag & OB_FROMDUPLI)) {
if (ob != bob) {
BLI_split_name_num(obname, &obnr, ob->id.name + 2, '.');
/* object ob has to be in same "group" ... it means, that it has to have same base of its name */
if (STREQ(obname, basisname)) {
if (obnr < basisnr) {
basis = ob;
basisnr = obnr;
}
}
}
}
}
}
return basis;
}
bool BKE_mball_minmax_ex(MetaBall *mb, float min[3], float max[3],
float obmat[4][4], const short flag)
{
const float scale = obmat ? mat4_to_scale(obmat) : 1.0f;
MetaElem *ml;
bool changed = false;
float centroid[3], vec[3];
INIT_MINMAX(min, max);
for (ml = mb->elems.first; ml; ml = ml->next) {
if ((ml->flag & flag) == flag) {
const float scale_mb = (ml->rad * 0.5f) * scale;
int i;
if (obmat) {
mul_v3_m4v3(centroid, obmat, &ml->x);
}
else {
copy_v3_v3(centroid, &ml->x);
}
/* TODO, non circle shapes cubes etc, probably nobody notices - campbell */
for (i = -1; i != 3; i += 2) {
copy_v3_v3(vec, centroid);
add_v3_fl(vec, scale_mb * i);
minmax_v3v3_v3(min, max, vec);
}
changed = true;
}
}
return changed;
}
/* basic vertex data functions */
bool BKE_mball_minmax(MetaBall *mb, float min[3], float max[3])
{
MetaElem *ml;
INIT_MINMAX(min, max);
for (ml = mb->elems.first; ml; ml = ml->next) {
minmax_v3v3_v3(min, max, &ml->x);
}
return (BLI_listbase_is_empty(&mb->elems) == false);
}
bool BKE_mball_center_median(MetaBall *mb, float r_cent[3])
{
MetaElem *ml;
int total = 0;
zero_v3(r_cent);
for (ml = mb->elems.first; ml; ml = ml->next) {
add_v3_v3(r_cent, &ml->x);
total++;
}
if (total) {
mul_v3_fl(r_cent, 1.0f / (float)total);
}
return (total != 0);
}
bool BKE_mball_center_bounds(MetaBall *mb, float r_cent[3])
{
float min[3], max[3];
if (BKE_mball_minmax(mb, min, max)) {
mid_v3_v3v3(r_cent, min, max);
return true;
}
return false;
}
void BKE_mball_transform(MetaBall *mb, float mat[4][4], const bool do_props)
{
MetaElem *me;
float quat[4];
const float scale = mat4_to_scale(mat);
const float scale_sqrt = sqrtf(scale);
mat4_to_quat(quat, mat);
for (me = mb->elems.first; me; me = me->next) {
mul_m4_v3(mat, &me->x);
mul_qt_qtqt(me->quat, quat, me->quat);
if (do_props) {
me->rad *= scale;
/* hrmf, probably elems shouldn't be
* treating scale differently - campbell */
if (!MB_TYPE_SIZE_SQUARED(me->type)) {
mul_v3_fl(&me->expx, scale);
}
else {
mul_v3_fl(&me->expx, scale_sqrt);
}
}
}
}
void BKE_mball_translate(MetaBall *mb, const float offset[3])
{
MetaElem *ml;
for (ml = mb->elems.first; ml; ml = ml->next) {
add_v3_v3(&ml->x, offset);
}
}
/* *** select funcs *** */
void BKE_mball_select_all(struct MetaBall *mb)
{
MetaElem *ml;
for (ml = mb->editelems->first; ml; ml = ml->next) {
ml->flag |= SELECT;
}
}
void BKE_mball_deselect_all(MetaBall *mb)
{
MetaElem *ml;
for (ml = mb->editelems->first; ml; ml = ml->next) {
ml->flag &= ~SELECT;
}
}
void BKE_mball_select_swap(struct MetaBall *mb)
{
MetaElem *ml;
for (ml = mb->editelems->first; ml; ml = ml->next) {
ml->flag ^= SELECT;
}
}
/* **** Depsgraph evaluation **** */
void BKE_mball_eval_geometry(const struct EvaluationContext *UNUSED(eval_ctx),
MetaBall *UNUSED(mball))
{
}
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