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Diffstat (limited to 'source/blender/blenkernel/intern/simple_deform.c')
| -rw-r--r-- | source/blender/blenkernel/intern/simple_deform.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/simple_deform.c b/source/blender/blenkernel/intern/simple_deform.c new file mode 100644 index 00000000000..2978a6f7f01 --- /dev/null +++ b/source/blender/blenkernel/intern/simple_deform.c @@ -0,0 +1,256 @@ +/** + * 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 "BKE_lattice.h" +#include "BKE_deform.h" +#include "BKE_utildefines.h" +#include "BLI_arithb.h" +#include "BKE_shrinkwrap.h" + +#include <string.h> +#include <math.h> + + +//Clamps/Limits the given coordinate to: limits[0] <= co[axis] <= limits[1] +//The ammount 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 + 1.0); + + co[0] = x*scale; + co[1] = y*scale; + co[2] = z*(1.0+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(fabs(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 */ +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 = get_named_vertexgroup_num(ob, smd->vgroup_name); + MDeformVert *dvert = NULL; + + //Safe-check + if(smd->origin == ob) smd->origin = NULL; //No self references + + if(smd->limit[0] < 0.0) smd->limit[0] = 0.0f; + if(smd->limit[0] > 1.0) 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 + { + Mat4CpyMat4(transf->local2target, smd->origin->obmat); + Mat4Invert(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 = vertexgroup_get_vertex_weight(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 + VecLerpf(vertexCos[i], vertexCos[i], co, weight); //Use vertex weight has coef of linear interpolation + + if(transf) space_transform_invert(transf, vertexCos[i]); + } + } +} + + |