Campbell Barton
8489b94e07
Importantly, reversed mul_serie_m3 argument order (so it matches the m4 function)
295 lines
8.4 KiB
C
295 lines
8.4 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2005 by the Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Daniel Dunbar
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* Ton Roosendaal,
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* Ben Batt,
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* Brecht Van Lommel,
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* Campbell Barton
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*
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* ***** END GPL LICENSE BLOCK *****
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*
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*/
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/** \file blender/modifiers/intern/MOD_hook.c
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* \ingroup modifiers
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*/
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#include "DNA_meshdata_types.h"
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#include "DNA_object_types.h"
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#include "BLI_math.h"
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#include "BLI_utildefines.h"
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#include "BKE_action.h"
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#include "BKE_cdderivedmesh.h"
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#include "BKE_modifier.h"
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#include "BKE_deform.h"
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#include "depsgraph_private.h"
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#include "MEM_guardedalloc.h"
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#include "MOD_util.h"
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static void initData(ModifierData *md)
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{
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HookModifierData *hmd = (HookModifierData *) md;
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hmd->force = 1.0;
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}
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static void copyData(ModifierData *md, ModifierData *target)
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{
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HookModifierData *hmd = (HookModifierData *) md;
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HookModifierData *thmd = (HookModifierData *) target;
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modifier_copyData_generic(md, target);
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thmd->indexar = MEM_dupallocN(hmd->indexar);
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}
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static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
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{
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HookModifierData *hmd = (HookModifierData *)md;
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CustomDataMask dataMask = 0;
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/* ask for vertexgroups if we need them */
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if (hmd->name[0]) dataMask |= CD_MASK_MDEFORMVERT;
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if (hmd->indexar) dataMask |= CD_MASK_ORIGINDEX;
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return dataMask;
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}
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static void freeData(ModifierData *md)
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{
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HookModifierData *hmd = (HookModifierData *) md;
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if (hmd->indexar) MEM_freeN(hmd->indexar);
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}
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static bool isDisabled(ModifierData *md, int UNUSED(useRenderParams))
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{
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HookModifierData *hmd = (HookModifierData *) md;
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return !hmd->object;
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}
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static void foreachObjectLink(
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ModifierData *md, Object *ob,
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void (*walk)(void *userData, Object *ob, Object **obpoin),
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void *userData)
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{
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HookModifierData *hmd = (HookModifierData *) md;
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walk(userData, ob, &hmd->object);
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}
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static void updateDepgraph(ModifierData *md, DagForest *forest,
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struct Scene *UNUSED(scene),
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Object *UNUSED(ob),
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DagNode *obNode)
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{
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HookModifierData *hmd = (HookModifierData *) md;
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if (hmd->object) {
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DagNode *curNode = dag_get_node(forest, hmd->object);
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if (hmd->subtarget[0])
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dag_add_relation(forest, curNode, obNode, DAG_RL_OB_DATA | DAG_RL_DATA_DATA, "Hook Modifier");
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else
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dag_add_relation(forest, curNode, obNode, DAG_RL_OB_DATA, "Hook Modifier");
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}
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}
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static float hook_falloff(const float co_1[3], const float co_2[3], const float falloff_squared, float fac)
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{
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if (falloff_squared) {
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float len_squared = len_squared_v3v3(co_1, co_2);
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if (len_squared > falloff_squared) {
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return 0.0f;
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}
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else if (len_squared > 0.0f) {
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return fac * (1.0f - (len_squared / falloff_squared));
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}
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}
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return fac;
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}
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static void deformVerts_do(HookModifierData *hmd, Object *ob, DerivedMesh *dm,
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float (*vertexCos)[3], int numVerts)
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{
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bPoseChannel *pchan = BKE_pose_channel_find_name(hmd->object->pose, hmd->subtarget);
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float vec[3], mat[4][4], dmat[4][4];
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int i, *index_pt;
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const float falloff_squared = hmd->falloff * hmd->falloff; /* for faster comparisons */
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MDeformVert *dvert;
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int defgrp_index, max_dvert;
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/* get world-space matrix of target, corrected for the space the verts are in */
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if (hmd->subtarget[0] && pchan) {
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/* bone target if there's a matching pose-channel */
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mul_m4_m4m4(dmat, hmd->object->obmat, pchan->pose_mat);
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}
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else {
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/* just object target */
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copy_m4_m4(dmat, hmd->object->obmat);
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}
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invert_m4_m4(ob->imat, ob->obmat);
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mul_m4_series(mat, ob->imat, dmat, hmd->parentinv);
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modifier_get_vgroup(ob, dm, hmd->name, &dvert, &defgrp_index);
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max_dvert = (dvert) ? numVerts : 0;
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/* Regarding index range checking below.
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*
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* This should always be true and I don't generally like
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* "paranoid" style code like this, but old files can have
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* indices that are out of range because old blender did
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* not correct them on exit editmode. - zr
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*/
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if (hmd->force == 0.0f) {
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/* do nothing, avoid annoying checks in the loop */
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}
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else if (hmd->indexar) { /* vertex indices? */
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const float fac_orig = hmd->force;
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float fac;
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const int *origindex_ar;
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/* if DerivedMesh is present and has original index data, use it */
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if (dm && (origindex_ar = dm->getVertDataArray(dm, CD_ORIGINDEX))) {
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for (i = 0, index_pt = hmd->indexar; i < hmd->totindex; i++, index_pt++) {
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if (*index_pt < numVerts) {
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int j;
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for (j = 0; j < numVerts; j++) {
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if (origindex_ar[j] == *index_pt) {
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float *co = vertexCos[j];
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if ((fac = hook_falloff(hmd->cent, co, falloff_squared, fac_orig))) {
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if (dvert)
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fac *= defvert_find_weight(dvert + j, defgrp_index);
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if (fac) {
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mul_v3_m4v3(vec, mat, co);
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interp_v3_v3v3(co, co, vec, fac);
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}
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}
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}
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}
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}
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}
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}
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else { /* missing dm or ORIGINDEX */
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for (i = 0, index_pt = hmd->indexar; i < hmd->totindex; i++, index_pt++) {
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if (*index_pt < numVerts) {
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float *co = vertexCos[*index_pt];
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if ((fac = hook_falloff(hmd->cent, co, falloff_squared, fac_orig))) {
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if (dvert)
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fac *= defvert_find_weight(dvert + (*index_pt), defgrp_index);
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if (fac) {
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mul_v3_m4v3(vec, mat, co);
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interp_v3_v3v3(co, co, vec, fac);
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}
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}
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}
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}
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}
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}
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else if (dvert) { /* vertex group hook */
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const float fac_orig = hmd->force;
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for (i = 0; i < max_dvert; i++, dvert++) {
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float fac;
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float *co = vertexCos[i];
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if ((fac = hook_falloff(hmd->cent, co, falloff_squared, fac_orig))) {
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fac *= defvert_find_weight(dvert, defgrp_index);
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if (fac) {
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mul_v3_m4v3(vec, mat, co);
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interp_v3_v3v3(co, co, vec, fac);
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}
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}
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}
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}
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}
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static void deformVerts(ModifierData *md, Object *ob, DerivedMesh *derivedData,
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float (*vertexCos)[3], int numVerts,
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ModifierApplyFlag UNUSED(flag))
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{
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HookModifierData *hmd = (HookModifierData *) md;
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DerivedMesh *dm = derivedData;
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/* We need a valid dm for meshes when a vgroup is set... */
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if (!dm && ob->type == OB_MESH && hmd->name[0] != '\0')
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dm = get_dm(ob, NULL, dm, NULL, false, false);
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deformVerts_do(hmd, ob, dm, vertexCos, numVerts);
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if (derivedData != dm)
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dm->release(dm);
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}
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static void deformVertsEM(ModifierData *md, Object *ob, struct BMEditMesh *editData,
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DerivedMesh *derivedData, float (*vertexCos)[3], int numVerts)
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{
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HookModifierData *hmd = (HookModifierData *) md;
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DerivedMesh *dm = derivedData;
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/* We need a valid dm for meshes when a vgroup is set... */
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if (!dm && ob->type == OB_MESH && hmd->name[0] != '\0')
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dm = get_dm(ob, editData, dm, NULL, false, false);
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deformVerts_do(hmd, ob, dm, vertexCos, numVerts);
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if (derivedData != dm)
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dm->release(dm);
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}
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ModifierTypeInfo modifierType_Hook = {
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/* name */ "Hook",
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/* structName */ "HookModifierData",
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/* structSize */ sizeof(HookModifierData),
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/* type */ eModifierTypeType_OnlyDeform,
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/* flags */ eModifierTypeFlag_AcceptsCVs |
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eModifierTypeFlag_SupportsEditmode,
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/* copyData */ copyData,
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/* deformVerts */ deformVerts,
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/* deformMatrices */ NULL,
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/* deformVertsEM */ deformVertsEM,
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/* deformMatricesEM */ NULL,
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/* applyModifier */ NULL,
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/* applyModifierEM */ NULL,
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/* initData */ initData,
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/* requiredDataMask */ requiredDataMask,
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/* freeData */ freeData,
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/* isDisabled */ isDisabled,
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/* updateDepgraph */ updateDepgraph,
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/* dependsOnTime */ NULL,
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/* dependsOnNormals */ NULL,
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/* foreachObjectLink */ foreachObjectLink,
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/* foreachIDLink */ NULL,
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/* foreachTexLink */ NULL,
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};
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