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/**
* deform_simple.c
*
* ***** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): André Pinto
*
* ***** END GPL LICENSE BLOCK *****
*/
#include "DNA_object_types.h"
#include "DNA_modifier_types.h"
#include "DNA_meshdata_types.h"
#include "BKE_simple_deform.h"
#include "BKE_DerivedMesh.h"
#include "BLI_arithb.h"
#include <string.h>
#include <math.h>
static void simpleDeform_tapper(const float factor, float *co)
{
float x = co[0], y = co[1], z = co[2];
co[0] = x*(1.0f + z*factor);
co[1] = y;
co[2] = z;
}
static void simpleDeform_twist(const float factor, float *co)
{
float x = co[0], y = co[1], z = co[2];
float theta = z*factor;
float sint = sin(theta);
float cost = cos(theta);
co[0] = x*cost - y*sint;
co[1] = x*sint + y*cost;
co[2] = z;
}
static void simpleDeform_bend(const float factor, float *co)
{
float x = co[0], y = co[1], z = co[2];
float x0 = 0.0f;
float theta = (x - x0)*factor;
float sint = sin(theta);
float cost = cos(theta);
co[0] = -sint*(y-1.0f/factor) + x0;
co[1] = cost*(y-1.0f/factor) + 1.0f/factor;
co[2] = z;
}
static void simpleDeform_shear(const float factor, float *co)
{
float x = co[0], y = co[1], z = co[2];
co[0] = x + factor;
co[1] = y;
co[2] = z;
}
/* simple deform modifier */
void SimpleDeformModifier_do(SimpleDeformModifierData *smd, float (*vertexCos)[3], int numVerts)
{
float (*ob2mod)[4] = NULL, (*mod2ob)[4] = NULL;
if(smd->origin)
{
Mat4Invert(smd->origin->imat, smd->origin->obmat); //inverse is outdated
ob2mod = smd->origin->imat;
mod2ob = smd->origin->obmat;
}
for(; numVerts; numVerts--, vertexCos++)
{
if(ob2mod)
Mat4MulVecfl(ob2mod, *vertexCos);
switch(smd->mode)
{
case 0: simpleDeform_tapper (smd->factor[0], *vertexCos); break;
case 1: simpleDeform_twist (smd->factor[0], *vertexCos); break;
case 2: simpleDeform_bend (smd->factor[0], *vertexCos); break;
case 3: simpleDeform_shear (smd->factor[0], *vertexCos); break;
}
if(mod2ob)
Mat4MulVecfl(mod2ob, *vertexCos);
}
}
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