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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) 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_simpledeform.c
* \ingroup modifiers
*/
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "BLI_math.h"
#include "BLI_string.h"
#include "BLI_utildefines.h"
#include "BKE_cdderivedmesh.h"
#include "BKE_lattice.h"
#include "BKE_modifier.h"
#include "BKE_deform.h"
#include "BKE_shrinkwrap.h"
#include "depsgraph_private.h"
#include "MOD_util.h"
/* Clamps/Limits the given coordinate to: limits[0] <= co[axis] <= limits[1]
* The amount of clamp is saved on dcut */
static void axis_limit(int axis, const float limits[2], float co[3], float dcut[3])
{
float val = co[axis];
if(limits[0] > val) val = limits[0];
if(limits[1] < val) val = limits[1];
dcut[axis] = co[axis] - val;
co[axis] = val;
}
static void simpleDeform_taper(const float factor, const float dcut[3], float *co)
{
float x = co[0], y = co[1], z = co[2];
float scale = z*factor;
co[0] = x + x*scale;
co[1] = y + y*scale;
co[2] = z;
if(dcut)
{
co[0] += dcut[0];
co[1] += dcut[1];
co[2] += dcut[2];
}
}
static void simpleDeform_stretch(const float factor, const float dcut[3], float *co)
{
float x = co[0], y = co[1], z = co[2];
float scale;
scale = (z*z*factor-factor + 1.0f);
co[0] = x*scale;
co[1] = y*scale;
co[2] = z*(1.0f+factor);
if(dcut)
{
co[0] += dcut[0];
co[1] += dcut[1];
co[2] += dcut[2];
}
}
static void simpleDeform_twist(const float factor, const float *dcut, float *co)
{
float x = co[0], y = co[1], z = co[2];
float theta, sint, cost;
theta = z*factor;
sint = sin(theta);
cost = cos(theta);
co[0] = x*cost - y*sint;
co[1] = x*sint + y*cost;
co[2] = z;
if(dcut)
{
co[0] += dcut[0];
co[1] += dcut[1];
co[2] += dcut[2];
}
}
static void simpleDeform_bend(const float factor, const float dcut[3], float *co)
{
float x = co[0], y = co[1], z = co[2];
float theta, sint, cost;
theta = x*factor;
sint = sin(theta);
cost = cos(theta);
if(fabsf(factor) > 1e-7f)
{
co[0] = -(y-1.0f/factor)*sint;
co[1] = (y-1.0f/factor)*cost + 1.0f/factor;
co[2] = z;
}
if(dcut)
{
co[0] += cost*dcut[0];
co[1] += sint*dcut[0];
co[2] += dcut[2];
}
}
/* simple deform modifier */
static void SimpleDeformModifier_do(SimpleDeformModifierData *smd, struct Object *ob, struct DerivedMesh *dm, float (*vertexCos)[3], int numVerts)
{
static const float lock_axis[2] = {0.0f, 0.0f};
int i;
int limit_axis = 0;
float smd_limit[2], smd_factor;
SpaceTransform *transf = NULL, tmp_transf;
void (*simpleDeform_callback)(const float factor, const float dcut[3], float *co) = NULL; //Mode callback
int vgroup = defgroup_name_index(ob, smd->vgroup_name);
MDeformVert *dvert = NULL;
//Safe-check
if(smd->origin == ob) smd->origin = NULL; //No self references
if(smd->limit[0] < 0.0f) smd->limit[0] = 0.0f;
if(smd->limit[0] > 1.0f) smd->limit[0] = 1.0f;
smd->limit[0] = MIN2(smd->limit[0], smd->limit[1]); //Upper limit >= than lower limit
//Calculate matrixs do convert between coordinate spaces
if(smd->origin)
{
transf = &tmp_transf;
if(smd->originOpts & MOD_SIMPLEDEFORM_ORIGIN_LOCAL)
{
space_transform_from_matrixs(transf, ob->obmat, smd->origin->obmat);
}
else
{
copy_m4_m4(transf->local2target, smd->origin->obmat);
invert_m4_m4(transf->target2local, transf->local2target);
}
}
//Setup vars
limit_axis = (smd->mode == MOD_SIMPLEDEFORM_MODE_BEND) ? 0 : 2; //Bend limits on X.. all other modes limit on Z
//Update limits if needed
{
float lower = FLT_MAX;
float upper = -FLT_MAX;
for(i=0; i<numVerts; i++)
{
float tmp[3];
VECCOPY(tmp, vertexCos[i]);
if(transf) space_transform_apply(transf, tmp);
lower = MIN2(lower, tmp[limit_axis]);
upper = MAX2(upper, tmp[limit_axis]);
}
//SMD values are normalized to the BV, calculate the absolut values
smd_limit[1] = lower + (upper-lower)*smd->limit[1];
smd_limit[0] = lower + (upper-lower)*smd->limit[0];
smd_factor = smd->factor / MAX2(FLT_EPSILON, smd_limit[1]-smd_limit[0]);
}
if(dm)
{
dvert = dm->getVertDataArray(dm, CD_MDEFORMVERT);
}
else if(ob->type == OB_LATTICE)
{
dvert = lattice_get_deform_verts(ob);
}
switch(smd->mode)
{
case MOD_SIMPLEDEFORM_MODE_TWIST: simpleDeform_callback = simpleDeform_twist; break;
case MOD_SIMPLEDEFORM_MODE_BEND: simpleDeform_callback = simpleDeform_bend; break;
case MOD_SIMPLEDEFORM_MODE_TAPER: simpleDeform_callback = simpleDeform_taper; break;
case MOD_SIMPLEDEFORM_MODE_STRETCH: simpleDeform_callback = simpleDeform_stretch; break;
default:
return; //No simpledeform mode?
}
for(i=0; i<numVerts; i++)
{
float weight = defvert_array_find_weight_safe(dvert, i, vgroup);
if(weight != 0.0f)
{
float co[3], dcut[3] = {0.0f, 0.0f, 0.0f};
if(transf) space_transform_apply(transf, vertexCos[i]);
VECCOPY(co, vertexCos[i]);
//Apply axis limits
if(smd->mode != MOD_SIMPLEDEFORM_MODE_BEND) //Bend mode shoulnt have any lock axis
{
if(smd->axis & MOD_SIMPLEDEFORM_LOCK_AXIS_X) axis_limit(0, lock_axis, co, dcut);
if(smd->axis & MOD_SIMPLEDEFORM_LOCK_AXIS_Y) axis_limit(1, lock_axis, co, dcut);
}
axis_limit(limit_axis, smd_limit, co, dcut);
simpleDeform_callback(smd_factor, dcut, co); //Apply deform
interp_v3_v3v3(vertexCos[i], vertexCos[i], co, weight); //Use vertex weight has coef of linear interpolation
if(transf) space_transform_invert(transf, vertexCos[i]);
}
}
}
/* SimpleDeform */
static void initData(ModifierData *md)
{
SimpleDeformModifierData *smd = (SimpleDeformModifierData*) md;
smd->mode = MOD_SIMPLEDEFORM_MODE_TWIST;
smd->axis = 0;
smd->origin = NULL;
smd->factor = 0.35f;
smd->limit[0] = 0.0f;
smd->limit[1] = 1.0f;
}
static void copyData(ModifierData *md, ModifierData *target)
{
SimpleDeformModifierData *smd = (SimpleDeformModifierData*)md;
SimpleDeformModifierData *tsmd = (SimpleDeformModifierData*)target;
tsmd->mode = smd->mode;
tsmd->axis = smd->axis;
tsmd->origin= smd->origin;
tsmd->originOpts= smd->originOpts;
tsmd->factor= smd->factor;
memcpy(tsmd->limit, smd->limit, sizeof(tsmd->limit));
BLI_strncpy(tsmd->vgroup_name, smd->vgroup_name, sizeof(tsmd->vgroup_name));
}
static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
SimpleDeformModifierData *smd = (SimpleDeformModifierData *)md;
CustomDataMask dataMask = 0;
/* ask for vertexgroups if we need them */
if(smd->vgroup_name[0])
dataMask |= CD_MASK_MDEFORMVERT;
return dataMask;
}
static void foreachObjectLink(ModifierData *md, Object *ob, void (*walk)(void *userData, Object *ob, Object **obpoin), void *userData)
{
SimpleDeformModifierData *smd = (SimpleDeformModifierData*)md;
walk(userData, ob, &smd->origin);
}
static void updateDepgraph(ModifierData *md, DagForest *forest,
struct Scene *UNUSED(scene),
Object *UNUSED(ob),
DagNode *obNode)
{
SimpleDeformModifierData *smd = (SimpleDeformModifierData*)md;
if (smd->origin)
dag_add_relation(forest, dag_get_node(forest, smd->origin), obNode, DAG_RL_OB_DATA, "SimpleDeform Modifier");
}
static void deformVerts(ModifierData *md, Object *ob,
DerivedMesh *derivedData,
float (*vertexCos)[3],
int numVerts,
int UNUSED(useRenderParams),
int UNUSED(isFinalCalc))
{
DerivedMesh *dm = derivedData;
CustomDataMask dataMask = requiredDataMask(ob, md);
/* we implement requiredDataMask but thats not really usefull since
mesh_calc_modifiers pass a NULL derivedData */
if(dataMask)
dm= get_dm(ob, NULL, dm, NULL, 0);
SimpleDeformModifier_do((SimpleDeformModifierData*)md, ob, dm, vertexCos, numVerts);
if(dm != derivedData)
dm->release(dm);
}
static void deformVertsEM(ModifierData *md, Object *ob,
struct BMEditMesh *editData,
DerivedMesh *derivedData,
float (*vertexCos)[3],
int numVerts)
{
DerivedMesh *dm = derivedData;
CustomDataMask dataMask = requiredDataMask(ob, md);
/* we implement requiredDataMask but thats not really usefull since
mesh_calc_modifiers pass a NULL derivedData */
if(dataMask)
dm= get_dm(ob, editData, dm, NULL, 0);
SimpleDeformModifier_do((SimpleDeformModifierData*)md, ob, dm, vertexCos, numVerts);
if(dm != derivedData)
dm->release(dm);
}
ModifierTypeInfo modifierType_SimpleDeform = {
/* name */ "SimpleDeform",
/* structName */ "SimpleDeformModifierData",
/* structSize */ sizeof(SimpleDeformModifierData),
/* type */ eModifierTypeType_OnlyDeform,
/* flags */ eModifierTypeFlag_AcceptsMesh
| eModifierTypeFlag_AcceptsCVs
| eModifierTypeFlag_SupportsEditmode
| eModifierTypeFlag_EnableInEditmode,
/* copyData */ copyData,
/* deformVerts */ deformVerts,
/* deformMatrices */ NULL,
/* deformVertsEM */ deformVertsEM,
/* deformMatricesEM */ NULL,
/* applyModifier */ NULL,
/* applyModifierEM */ NULL,
/* initData */ initData,
/* requiredDataMask */ requiredDataMask,
/* freeData */ NULL,
/* isDisabled */ NULL,
/* updateDepgraph */ updateDepgraph,
/* dependsOnTime */ NULL,
/* dependsOnNormals */ NULL,
/* foreachObjectLink */ foreachObjectLink,
/* foreachIDLink */ NULL,
};
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