430 lines
11 KiB
C
430 lines
11 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_library_query.h"
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#include "BKE_modifier.h"
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#include "BKE_deform.h"
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#include "BKE_colortools.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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hmd->curfalloff = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
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hmd->falloff_type = eHook_Falloff_Smooth;
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hmd->flag = 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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if (thmd->curfalloff != NULL) {
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curvemapping_free(thmd->curfalloff);
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}
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if (thmd->indexar != NULL) {
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MEM_freeN(thmd->indexar);
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}
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modifier_copyData_generic(md, target);
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thmd->curfalloff = curvemapping_copy(hmd->curfalloff);
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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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curvemapping_free(hmd->curfalloff);
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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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ObjectWalkFunc walk, void *userData)
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{
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HookModifierData *hmd = (HookModifierData *) md;
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walk(userData, ob, &hmd->object, IDWALK_CB_NOP);
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}
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static void updateDepgraph(ModifierData *md, const ModifierUpdateDepsgraphContext *ctx)
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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(ctx->forest, hmd->object);
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if (hmd->subtarget[0])
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dag_add_relation(ctx->forest, curNode, ctx->obNode, DAG_RL_OB_DATA | DAG_RL_DATA_DATA, "Hook Modifier");
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else
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dag_add_relation(ctx->forest, curNode, ctx->obNode, DAG_RL_OB_DATA, "Hook Modifier");
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}
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}
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static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphContext *ctx)
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{
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HookModifierData *hmd = (HookModifierData *)md;
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if (hmd->object != NULL) {
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if (hmd->subtarget[0]) {
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DEG_add_bone_relation(ctx->node, hmd->object, hmd->subtarget, DEG_OB_COMP_BONE, "Hook Modifier");
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}
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DEG_add_object_relation(ctx->node, hmd->object, DEG_OB_COMP_TRANSFORM, "Hook Modifier");
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}
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/* We need own transformation as well. */
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DEG_add_object_relation(ctx->node, ctx->object, DEG_OB_COMP_TRANSFORM, "Hook Modifier");
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}
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struct HookData_cb {
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float (*vertexCos)[3];
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MDeformVert *dvert;
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int defgrp_index;
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struct CurveMapping *curfalloff;
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char falloff_type;
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float falloff;
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float falloff_sq;
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float fac_orig;
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unsigned int use_falloff : 1;
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unsigned int use_uniform : 1;
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float cent[3];
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float mat_uniform[3][3];
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float mat[4][4];
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};
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static float hook_falloff(
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const struct HookData_cb *hd,
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const float len_sq)
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{
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BLI_assert(hd->falloff_sq);
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if (len_sq > hd->falloff_sq) {
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return 0.0f;
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}
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else if (len_sq > 0.0f) {
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float fac;
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if (hd->falloff_type == eHook_Falloff_Const) {
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fac = 1.0f;
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goto finally;
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}
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else if (hd->falloff_type == eHook_Falloff_InvSquare) {
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/* avoid sqrt below */
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fac = 1.0f - (len_sq / hd->falloff_sq);
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goto finally;
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}
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fac = 1.0f - (sqrtf(len_sq) / hd->falloff);
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/* closely match PROP_SMOOTH and similar */
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switch (hd->falloff_type) {
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#if 0
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case eHook_Falloff_None:
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fac = 1.0f;
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break;
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#endif
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case eHook_Falloff_Curve:
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fac = curvemapping_evaluateF(hd->curfalloff, 0, fac);
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break;
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case eHook_Falloff_Sharp:
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fac = fac * fac;
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break;
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case eHook_Falloff_Smooth:
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fac = 3.0f * fac * fac - 2.0f * fac * fac * fac;
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break;
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case eHook_Falloff_Root:
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fac = sqrtf(fac);
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break;
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case eHook_Falloff_Linear:
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/* pass */
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break;
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#if 0
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case eHook_Falloff_Const:
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fac = 1.0f;
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break;
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#endif
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case eHook_Falloff_Sphere:
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fac = sqrtf(2 * fac - fac * fac);
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break;
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#if 0
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case eHook_Falloff_InvSquare:
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fac = fac * (2.0f - fac);
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break;
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#endif
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}
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finally:
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return fac * hd->fac_orig;
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}
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else {
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return hd->fac_orig;
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}
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}
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static void hook_co_apply(struct HookData_cb *hd, const int j)
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{
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float *co = hd->vertexCos[j];
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float fac;
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if (hd->use_falloff) {
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float len_sq;
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if (hd->use_uniform) {
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float co_uniform[3];
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mul_v3_m3v3(co_uniform, hd->mat_uniform, co);
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len_sq = len_squared_v3v3(hd->cent, co_uniform);
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}
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else {
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len_sq = len_squared_v3v3(hd->cent, co);
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}
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fac = hook_falloff(hd, len_sq);
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}
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else {
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fac = hd->fac_orig;
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}
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if (fac) {
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if (hd->dvert) {
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fac *= defvert_find_weight(&hd->dvert[j], hd->defgrp_index);
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}
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if (fac) {
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float co_tmp[3];
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mul_v3_m4v3(co_tmp, hd->mat, co);
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interp_v3_v3v3(co, co, co_tmp, fac);
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}
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}
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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 dmat[4][4];
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int i, *index_pt;
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struct HookData_cb hd;
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if (hmd->curfalloff == NULL) {
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/* should never happen, but bad lib linking could cause it */
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hmd->curfalloff = curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
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}
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if (hmd->curfalloff) {
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curvemapping_initialize(hmd->curfalloff);
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}
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/* Generic data needed for applying per-vertex calculations (initialize all members) */
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hd.vertexCos = vertexCos;
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modifier_get_vgroup(ob, dm, hmd->name, &hd.dvert, &hd.defgrp_index);
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hd.curfalloff = hmd->curfalloff;
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hd.falloff_type = hmd->falloff_type;
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hd.falloff = (hmd->falloff_type == eHook_Falloff_None) ? 0.0f : hmd->falloff;
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hd.falloff_sq = SQUARE(hd.falloff);
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hd.fac_orig = hmd->force;
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hd.use_falloff = (hd.falloff_sq != 0.0f);
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hd.use_uniform = (hmd->flag & MOD_HOOK_UNIFORM_SPACE) != 0;
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if (hd.use_uniform) {
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copy_m3_m4(hd.mat_uniform, hmd->parentinv);
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mul_v3_m3v3(hd.cent, hd.mat_uniform, hmd->cent);
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}
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else {
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unit_m3(hd.mat_uniform); /* unused */
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copy_v3_v3(hd.cent, hmd->cent);
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}
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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(hd.mat, ob->imat, dmat, hmd->parentinv);
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/* --- done with 'hd' init --- */
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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 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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hook_co_apply(&hd, j);
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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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hook_co_apply(&hd, *index_pt);
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}
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}
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}
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}
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else if (hd.dvert) { /* vertex group hook */
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for (i = 0; i < numVerts; i++) {
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hook_co_apply(&hd, i);
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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_AcceptsLattice |
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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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/* updateDepsgraph */ updateDepsgraph,
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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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