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blender-archive/source/blender/modifiers/intern/MOD_weightvgproximity.c

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/*
* $Id$
*
* ***** 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) 2011 by Bastien Montagne.
* All rights reserved.
*
* Contributor(s): None yet.
*
* ***** END GPL LICENSE BLOCK *****
*
*/
/** \file blender/modifiers/intern/MOD_weightvgproximity.c
* \ingroup modifiers
*/
#include "BLI_editVert.h"
#include "BLI_math.h"
#include "BLI_string.h"
#include "BLI_utildefines.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "BKE_cdderivedmesh.h"
#include "BKE_deform.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_shrinkwrap.h" /* For SpaceTransform stuff. */
#include "BKE_texture.h" /* Texture masking. */
#include "depsgraph_private.h"
#include "MEM_guardedalloc.h"
#include "MOD_util.h"
#include "MOD_weightvg_util.h"
/**************************************
* Util functions. *
**************************************/
/* Util macro. */
#define OUT_OF_MEMORY() ((void)printf("WeightVGProximity: Out of memory.\n"))
/**
* Find nearest vertex and/or edge and/or face, for each vertex (adapted from shrinkwrap.c).
*/
static void get_vert2geom_distance(int numVerts, float (*v_cos)[3],
float *dist_v, float *dist_e, float *dist_f,
DerivedMesh *target, const SpaceTransform *loc2trgt)
{
int i;
BVHTreeFromMesh treeData_v = NULL_BVHTreeFromMesh;
BVHTreeFromMesh treeData_e = NULL_BVHTreeFromMesh;
BVHTreeFromMesh treeData_f = NULL_BVHTreeFromMesh;
BVHTreeNearest nearest_v = NULL_BVHTreeNearest;
BVHTreeNearest nearest_e = NULL_BVHTreeNearest;
BVHTreeNearest nearest_f = NULL_BVHTreeNearest;
if (dist_v) {
/* Create a bvh-tree of the given target's verts. */
bvhtree_from_mesh_verts(&treeData_v, target, 0.0, 2, 6);
if(treeData_v.tree == NULL) {
OUT_OF_MEMORY();
return;
}
}
if (dist_e) {
/* Create a bvh-tree of the given target's edges. */
bvhtree_from_mesh_edges(&treeData_e, target, 0.0, 2, 6);
if(treeData_e.tree == NULL) {
OUT_OF_MEMORY();
return;
}
}
if (dist_f) {
/* Create a bvh-tree of the given target's faces. */
bvhtree_from_mesh_faces(&treeData_f, target, 0.0, 2, 6);
if(treeData_f.tree == NULL) {
OUT_OF_MEMORY();
return;
}
}
/* Setup nearest. */
nearest_v.index = nearest_e.index = nearest_f.index = -1;
/*nearest_v.dist = nearest_e.dist = nearest_f.dist = FLT_MAX;*/
/* Find the nearest vert/edge/face. */
#ifndef __APPLE__
#pragma omp parallel for default(none) private(i) firstprivate(nearest_v,nearest_e,nearest_f) \
shared(treeData_v,treeData_e,treeData_f,numVerts,v_cos,dist_v,dist_e, \
dist_f,loc2trgt) \
schedule(static)
#endif
for (i = 0; i < numVerts; ++i) {
float tmp_co[3];
/* Convert the vertex to tree coordinates. */
copy_v3_v3(tmp_co, v_cos[i]);
space_transform_apply(loc2trgt, tmp_co);
/* Use local proximity heuristics (to reduce the nearest search).
*
* If we already had an hit before, we assume this vertex is going to have a close hit to
* that other vertex, so we can initiate the "nearest.dist" with the expected value to that
* last hit.
* This will lead in prunning of the search tree.
*/
if (dist_v) {
nearest_v.dist = nearest_v.index != -1 ? len_squared_v3v3(tmp_co, nearest_v.co) : FLT_MAX;
/* Compute and store result. If invalid (-1 idx), keep FLT_MAX dist. */
BLI_bvhtree_find_nearest(treeData_v.tree, tmp_co, &nearest_v, treeData_v.nearest_callback, &treeData_v);
dist_v[i] = sqrtf(nearest_v.dist);
}
if (dist_e) {
nearest_e.dist = nearest_e.index != -1 ? len_squared_v3v3(tmp_co, nearest_e.co) : FLT_MAX;
/* Compute and store result. If invalid (-1 idx), keep FLT_MAX dist. */
BLI_bvhtree_find_nearest(treeData_e.tree, tmp_co, &nearest_e, treeData_e.nearest_callback, &treeData_e);
dist_e[i] = sqrtf(nearest_e.dist);
}
if (dist_f) {
nearest_f.dist = nearest_f.index != -1 ? len_squared_v3v3(tmp_co, nearest_f.co) : FLT_MAX;
/* Compute and store result. If invalid (-1 idx), keep FLT_MAX dist. */
BLI_bvhtree_find_nearest(treeData_f.tree, tmp_co, &nearest_f, treeData_f.nearest_callback, &treeData_f);
dist_f[i] = sqrtf(nearest_f.dist);
}
}
if (dist_v)
free_bvhtree_from_mesh(&treeData_v);
if (dist_e)
free_bvhtree_from_mesh(&treeData_e);
if (dist_f)
free_bvhtree_from_mesh(&treeData_f);
}
/**
* Returns the real distance between a vertex and another reference object.
* Note that it works in final world space (i.e. with constraints etc. applied).
*/
static void get_vert2ob_distance(int numVerts, float (*v_cos)[3], float *dist,
Object* ob, Object* obr)
{
/* Vertex and ref object coordinates. */
float v_wco[3];
unsigned int i= numVerts;
while(i-- > 0) {
/* Get world-coordinates of the vertex (constraints and anim included). */
mul_v3_m4v3(v_wco, ob->obmat, v_cos[i]);
/* Return distance between both coordinates. */
dist[i] = len_v3v3(v_wco, obr->obmat[3]);
}
}
/**
* Returns the real distance between an object and another reference object.
* Note that it works in final world space (i.e. with constraints etc. applied).
*/
static float get_ob2ob_distance(const Object* ob, const Object* obr)
{
return len_v3v3(ob->obmat[3], obr->obmat[3]);
}
/**
* Maps distances to weights, with an optionnal “smoothing” mapping.
*/
void do_map(float *weights, const int nidx, const float min_d, const float max_d, short mode)
{
const float range_inv= 1.0f / (max_d - min_d); /* invert since multiplication is faster */
unsigned int i= nidx;
if(max_d == min_d) {
while (i-- > 0) {
weights[i] = (weights[i] >= max_d) ? 1.0f : 0.0f; /* "Step" behavior... */
}
}
else if(max_d > min_d) {
while (i-- > 0) {
if (weights[i] >= max_d) weights[i]= 1.0f; /* most likely case first */
else if(weights[i] <= min_d) weights[i]= 0.0f;
else weights[i]= (weights[i] - min_d) * range_inv;
}
}
else {
while (i-- > 0) {
if (weights[i] <= max_d) weights[i]= 1.0f; /* most likely case first */
else if(weights[i] >= min_d) weights[i]= 0.0f;
else weights[i]= (weights[i] - min_d) * range_inv;
}
}
if(!ELEM(mode, MOD_WVG_MAPPING_NONE, MOD_WVG_MAPPING_CURVE)) {
weightvg_do_map(nidx, weights, mode, NULL);
}
}
/**************************************
* Modifiers functions. *
**************************************/
static void initData(ModifierData *md)
{
WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData*) md;
wmd->proximity_mode = MOD_WVG_PROXIMITY_OBJECT;
wmd->proximity_flags = MOD_WVG_PROXIMITY_GEOM_VERTS;
wmd->falloff_type = MOD_WVG_MAPPING_NONE;
wmd->mask_constant = 1.0f;
wmd->mask_tex_use_channel = MOD_WVG_MASK_TEX_USE_INT; /* Use intensity by default. */
wmd->mask_tex_mapping = MOD_DISP_MAP_LOCAL;
wmd->max_dist = 1.0f; /* vert arbitrary distance, but don't use 0 */
}
static void copyData(ModifierData *md, ModifierData *target)
{
WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData*) md;
WeightVGProximityModifierData *twmd = (WeightVGProximityModifierData*) target;
BLI_strncpy(twmd->defgrp_name, wmd->defgrp_name, sizeof(twmd->defgrp_name));
twmd->proximity_mode = wmd->proximity_mode;
twmd->proximity_flags = wmd->proximity_flags;
twmd->proximity_ob_target = wmd->proximity_ob_target;
twmd->falloff_type = wmd->falloff_type;
twmd->mask_constant = wmd->mask_constant;
BLI_strncpy(twmd->mask_defgrp_name, wmd->mask_defgrp_name, sizeof(twmd->mask_defgrp_name));
twmd->mask_texture = wmd->mask_texture;
twmd->mask_tex_use_channel = wmd->mask_tex_use_channel;
twmd->mask_tex_mapping = wmd->mask_tex_mapping;
twmd->mask_tex_map_obj = wmd->mask_tex_map_obj;
BLI_strncpy(twmd->mask_tex_uvlayer_name, wmd->mask_tex_uvlayer_name, sizeof(twmd->mask_tex_uvlayer_name));
twmd->min_dist = wmd->min_dist;
twmd->max_dist = wmd->max_dist;
}
static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData*) md;
CustomDataMask dataMask = 0;
/* We need vertex groups! */
dataMask |= CD_MASK_MDEFORMVERT;
/* Ask for UV coordinates if we need them. */
if(wmd->mask_tex_mapping == MOD_DISP_MAP_UV)
dataMask |= CD_MASK_MTFACE;
return dataMask;
}
static int dependsOnTime(ModifierData *md)
{
WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData*) md;
if(wmd->mask_texture)
return BKE_texture_dependsOnTime(wmd->mask_texture);
return 0;
}
static void foreachObjectLink(ModifierData *md, Object *ob,
void (*walk)(void *userData, Object *ob, Object **obpoin),
void *userData)
{
WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData*) md;
walk(userData, ob, &wmd->proximity_ob_target);
walk(userData, ob, &wmd->mask_tex_map_obj);
}
static void foreachIDLink(ModifierData *md, Object *ob, IDWalkFunc walk, void *userData)
{
WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData*) md;
walk(userData, ob, (ID **)&wmd->mask_texture);
foreachObjectLink(md, ob, (ObjectWalkFunc)walk, userData);
}
static void foreachTexLink(ModifierData *md, Object *ob, TexWalkFunc walk, void *userData)
{
walk(userData, ob, md, "mask_texture");
}
static void updateDepgraph(ModifierData *md, DagForest *forest, struct Scene *UNUSED(scene),
Object *UNUSED(ob), DagNode *obNode)
{
WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData*) md;
DagNode *curNode;
if (wmd->proximity_ob_target) {
curNode = dag_get_node(forest, wmd->proximity_ob_target);
dag_add_relation(forest, curNode, obNode, DAG_RL_DATA_DATA|DAG_RL_OB_DATA,
"WeightVGProximity Modifier");
}
if(wmd->mask_tex_map_obj && wmd->mask_tex_mapping == MOD_DISP_MAP_OBJECT) {
curNode = dag_get_node(forest, wmd->mask_tex_map_obj);
dag_add_relation(forest, curNode, obNode, DAG_RL_DATA_DATA|DAG_RL_OB_DATA,
"WeightVGProximity Modifier");
}
if(wmd->mask_tex_mapping == MOD_DISP_MAP_GLOBAL)
dag_add_relation(forest, obNode, obNode, DAG_RL_DATA_DATA|DAG_RL_OB_DATA,
"WeightVGProximity Modifier");
}
static int isDisabled(ModifierData *md, int UNUSED(useRenderParams))
{
WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData*) md;
/* If no vertex group, bypass. */
if (wmd->defgrp_name[0] == '\0') return 1;
/* If no target object, bypass. */
return (wmd->proximity_ob_target == NULL);
}
static DerivedMesh *applyModifier(ModifierData *md, Object *ob, DerivedMesh *derivedData,
int UNUSED(useRenderParams), int UNUSED(isFinalCalc))
{
WeightVGProximityModifierData *wmd = (WeightVGProximityModifierData*) md;
DerivedMesh *dm = derivedData, *ret = NULL;
#if 0
Mesh *ob_m = NULL;
#endif
MDeformVert *dvert = NULL;
MDeformWeight **dw, **tdw;
int numVerts;
float (*v_cos)[3] = NULL; /* The vertices coordinates. */
Object *obr = NULL; /* Our target object. */
int defgrp_idx;
float *tw = NULL;
float *org_w = NULL;
float *new_w =NULL;
int *tidx, *indices = NULL;
int numIdx = 0;
int i;
char rel_ret = 0; /* Boolean, whether we have to release ret dm or not, when not using it! */
/* Get number of verts. */
numVerts = dm->getNumVerts(dm);
/* Check if we can just return the original mesh.
* Must have verts and therefore verts assigned to vgroups to do anything useful!
*/
if ((numVerts == 0) || (ob->defbase.first == NULL))
return dm;
/* Get our target object. */
obr = wmd->proximity_ob_target;
if (obr == NULL)
return dm;
/* Get vgroup idx from its name. */
defgrp_idx = defgroup_name_index(ob, wmd->defgrp_name);
if (defgrp_idx < 0)
return dm;
/* XXX All this to avoid copying dm when not needed... However, it nearly doubles compute
* time! See scene 5 of the WeighVG test file...
*/
#if 0
/* Get actual dverts (ie vertex group data). */
dvert = dm->getVertDataArray(dm, CD_MDEFORMVERT);
/* If no dverts, return unmodified data... */
if (dvert == NULL)
return dm;
/* Get org mesh, only to test whether affected cdata layer has already been copied
* somewhere up in the modifiers stack.
*/
ob_m = get_mesh(ob);
if (ob_m == NULL)
return dm;
/* Create a copy of our dmesh, only if our affected cdata layer is the same as org mesh. */
if (dvert == CustomData_get_layer(&ob_m->vdata, CD_MDEFORMVERT)) {
/* XXX Seems to create problems with weightpaint mode???
* I'm missing something here, I guess...
*/
// DM_set_only_copy(dm, CD_MASK_MDEFORMVERT); /* Only copy defgroup layer. */
ret = CDDM_copy(dm);
dvert = ret->getVertDataArray(ret, CD_MDEFORMVERT);
if (dvert == NULL) {
ret->release(ret);
return dm;
}
rel_ret = 1;
}
else
ret = dm;
#else
ret = CDDM_copy(dm);
rel_ret = 1;
dvert = ret->getVertDataArray(ret, CD_MDEFORMVERT);
if (dvert == NULL) {
if (rel_ret)
ret->release(ret);
return dm;
}
#endif
/* Find out which vertices to work on (all vertices in vgroup), and get their relevant weight.
*/
tidx = MEM_mallocN(sizeof(int) * numVerts, "WeightVGProximity Modifier, tidx");
tw = MEM_mallocN(sizeof(float) * numVerts, "WeightVGProximity Modifier, tw");
tdw = MEM_mallocN(sizeof(MDeformWeight*) * numVerts, "WeightVGProximity Modifier, tdw");
for (i = 0; i < numVerts; i++) {
MDeformWeight *_dw = defvert_find_index(&dvert[i], defgrp_idx);
if(_dw) {
tidx[numIdx] = i;
tw[numIdx] = _dw->weight;
tdw[numIdx++] = _dw;
}
}
/* If no vertices found, return org data! */
if(numIdx == 0) {
MEM_freeN(tidx);
MEM_freeN(tw);
MEM_freeN(tdw);
if (rel_ret)
ret->release(ret);
return dm;
}
indices = MEM_mallocN(sizeof(int) * numIdx, "WeightVGProximity Modifier, indices");
memcpy(indices, tidx, sizeof(int) * numIdx);
org_w = MEM_mallocN(sizeof(float) * numIdx, "WeightVGProximity Modifier, org_w");
new_w = MEM_mallocN(sizeof(float) * numIdx, "WeightVGProximity Modifier, new_w");
memcpy(org_w, tw, sizeof(float) * numIdx);
dw = MEM_mallocN(sizeof(MDeformWeight*) * numIdx, "WeightVGProximity Modifier, dw");
memcpy(dw, tdw, sizeof(MDeformWeight*) * numIdx);
MEM_freeN(tidx);
MEM_freeN(tw);
MEM_freeN(tdw);
/* Get our vertex coordinates. */
v_cos = MEM_mallocN(sizeof(float[3]) * numIdx, "WeightVGProximity Modifier, v_cos");
for (i = 0; i < numIdx; i++)
ret->getVertCo(ret, indices[i], v_cos[i]);
/* Compute wanted distances. */
if (wmd->proximity_mode == MOD_WVG_PROXIMITY_OBJECT) {
const float dist = get_ob2ob_distance(ob, obr);
for(i = 0; i < numIdx; i++)
new_w[i] = dist;
}
else if (wmd->proximity_mode == MOD_WVG_PROXIMITY_GEOMETRY) {
const short use_trgt_verts = (wmd->proximity_flags & MOD_WVG_PROXIMITY_GEOM_VERTS);
const short use_trgt_edges = (wmd->proximity_flags & MOD_WVG_PROXIMITY_GEOM_EDGES);
const short use_trgt_faces = (wmd->proximity_flags & MOD_WVG_PROXIMITY_GEOM_FACES);
if (use_trgt_verts || use_trgt_edges || use_trgt_faces) {
DerivedMesh *target_dm = obr->derivedFinal;
if (!target_dm) {
if (ELEM3(obr->type, OB_CURVE, OB_SURF, OB_FONT))
target_dm = CDDM_from_curve(obr);
else if (obr->type == OB_MESH) {
Mesh *me = (Mesh*)obr->data;
if (me->edit_mesh)
target_dm = CDDM_from_editmesh((EditMesh*)me->edit_mesh, me);
else
target_dm = CDDM_from_mesh(me, obr);
}
}
/* We must check that we do have a valid target_dm! */
if (target_dm) {
SpaceTransform loc2trgt;
float *dists_v = use_trgt_verts ? MEM_mallocN(sizeof(float) * numIdx, "WeightVGProximity Modifier, dists_v") : NULL;
float *dists_e = use_trgt_edges ? MEM_mallocN(sizeof(float) * numIdx, "WeightVGProximity Modifier, dists_e") : NULL;
float *dists_f = use_trgt_faces ? MEM_mallocN(sizeof(float) * numIdx, "WeightVGProximity Modifier, dists_f") : NULL;
space_transform_setup(&loc2trgt, ob, obr);
get_vert2geom_distance(numIdx, v_cos, dists_v, dists_e, dists_f,
target_dm, &loc2trgt);
for(i = 0; i < numIdx; i++) {
new_w[i] = dists_v ? dists_v[i] : FLT_MAX;
if(dists_e)
new_w[i] = minf(dists_e[i], new_w[i]);
if(dists_f)
new_w[i] = minf(dists_f[i], new_w[i]);
}
if(dists_v) MEM_freeN(dists_v);
if(dists_e) MEM_freeN(dists_e);
if(dists_f) MEM_freeN(dists_f);
}
/* Else, fall back to default obj2vert behavior. */
else {
get_vert2ob_distance(numIdx, v_cos, new_w, ob, obr);
}
}
else {
get_vert2ob_distance(numIdx, v_cos, new_w, ob, obr);
}
}
/* Map distances to weights. */
do_map(new_w, numIdx, wmd->min_dist, wmd->max_dist, wmd->falloff_type);
/* Do masking. */
weightvg_do_mask(numIdx, indices, org_w, new_w, ob, ret, wmd->mask_constant,
wmd->mask_defgrp_name, wmd->mask_texture, wmd->mask_tex_use_channel,
wmd->mask_tex_mapping, wmd->mask_tex_map_obj, wmd->mask_tex_uvlayer_name);
/* Update vgroup. Note we never add nor remove vertices from vgroup here. */
weightvg_update_vg(dvert, defgrp_idx, dw, numIdx, indices, org_w, FALSE, 0.0f, FALSE, 0.0f);
/* Freeing stuff. */
MEM_freeN(org_w);
MEM_freeN(new_w);
MEM_freeN(dw);
MEM_freeN(indices);
MEM_freeN(v_cos);
/* Return the vgroup-modified mesh. */
return ret;
}
static DerivedMesh *applyModifierEM(ModifierData *md, Object *ob,
struct EditMesh *UNUSED(editData),
DerivedMesh *derivedData)
{
return applyModifier(md, ob, derivedData, 0, 1);
}
ModifierTypeInfo modifierType_WeightVGProximity = {
/* name */ "VertexWeightProximity",
/* structName */ "WeightVGProximityModifierData",
/* structSize */ sizeof(WeightVGProximityModifierData),
/* type */ eModifierTypeType_Nonconstructive,
/* flags */ eModifierTypeFlag_AcceptsMesh
/* |eModifierTypeFlag_SupportsMapping*/
|eModifierTypeFlag_SupportsEditmode,
/* copyData */ copyData,
/* deformVerts */ NULL,
/* deformMatrices */ NULL,
/* deformVertsEM */ NULL,
/* deformMatricesEM */ NULL,
/* applyModifier */ applyModifier,
/* applyModifierEM */ applyModifierEM,
/* initData */ initData,
/* requiredDataMask */ requiredDataMask,
/* freeData */ NULL,
/* isDisabled */ isDisabled,
/* updateDepgraph */ updateDepgraph,
/* dependsOnTime */ dependsOnTime,
/* dependsOnNormals */ NULL,
/* foreachObjectLink */ foreachObjectLink,
/* foreachIDLink */ foreachIDLink,
/* foreachTexLink */ foreachTexLink,
};
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