376 lines
10 KiB
C
376 lines
10 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_simpledeform.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_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 "MOD_util.h"
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#define BEND_EPS 0.000001f
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/* Clamps/Limits the given coordinate to: limits[0] <= co[axis] <= limits[1]
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* The amount of clamp is saved on dcut */
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static void axis_limit(int axis, const float limits[2], float co[3], float dcut[3])
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{
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float val = co[axis];
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if (limits[0] > val) val = limits[0];
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if (limits[1] < val) val = limits[1];
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dcut[axis] = co[axis] - val;
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co[axis] = val;
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}
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static void simpleDeform_taper(const float factor, const float dcut[3], float r_co[3])
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{
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float x = r_co[0], y = r_co[1], z = r_co[2];
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float scale = z * factor;
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r_co[0] = x + x * scale;
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r_co[1] = y + y * scale;
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r_co[2] = z;
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{
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r_co[0] += dcut[0];
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r_co[1] += dcut[1];
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r_co[2] += dcut[2];
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}
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}
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static void simpleDeform_stretch(const float factor, const float dcut[3], float r_co[3])
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{
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float x = r_co[0], y = r_co[1], z = r_co[2];
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float scale;
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scale = (z * z * factor - factor + 1.0f);
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r_co[0] = x * scale;
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r_co[1] = y * scale;
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r_co[2] = z * (1.0f + factor);
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{
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r_co[0] += dcut[0];
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r_co[1] += dcut[1];
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r_co[2] += dcut[2];
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}
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}
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static void simpleDeform_twist(const float factor, const float *dcut, float r_co[3])
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{
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float x = r_co[0], y = r_co[1], z = r_co[2];
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float theta, sint, cost;
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theta = z * factor;
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sint = sinf(theta);
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cost = cosf(theta);
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r_co[0] = x * cost - y * sint;
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r_co[1] = x * sint + y * cost;
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r_co[2] = z;
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{
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r_co[0] += dcut[0];
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r_co[1] += dcut[1];
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r_co[2] += dcut[2];
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}
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}
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static void simpleDeform_bend(const float factor, const float dcut[3], float r_co[3])
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{
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float x = r_co[0], y = r_co[1], z = r_co[2];
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float theta, sint, cost;
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BLI_assert(!(fabsf(factor) < BEND_EPS));
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theta = x * factor;
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sint = sinf(theta);
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cost = cosf(theta);
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r_co[0] = -(y - 1.0f / factor) * sint;
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r_co[1] = (y - 1.0f / factor) * cost + 1.0f / factor;
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r_co[2] = z;
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{
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r_co[0] += cost * dcut[0];
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r_co[1] += sint * dcut[0];
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r_co[2] += dcut[2];
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}
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}
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/* simple deform modifier */
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static void SimpleDeformModifier_do(SimpleDeformModifierData *smd, struct Object *ob, struct DerivedMesh *dm,
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float (*vertexCos)[3], int numVerts)
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{
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static const float lock_axis[2] = {0.0f, 0.0f};
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int i;
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int limit_axis = 0;
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float smd_limit[2], smd_factor;
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SpaceTransform *transf = NULL, tmp_transf;
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void (*simpleDeform_callback)(const float factor, const float dcut[3], float co[3]) = NULL; /* Mode callback */
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int vgroup;
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MDeformVert *dvert;
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/* Safe-check */
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if (smd->origin == ob) smd->origin = NULL; /* No self references */
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if (smd->limit[0] < 0.0f) smd->limit[0] = 0.0f;
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if (smd->limit[0] > 1.0f) smd->limit[0] = 1.0f;
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smd->limit[0] = min_ff(smd->limit[0], smd->limit[1]); /* Upper limit >= than lower limit */
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/* Calculate matrixs do convert between coordinate spaces */
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if (smd->origin) {
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transf = &tmp_transf;
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BLI_SPACE_TRANSFORM_SETUP(transf, ob, smd->origin);
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}
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/* Setup vars,
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* Bend limits on X.. all other modes limit on Z */
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limit_axis = (smd->mode == MOD_SIMPLEDEFORM_MODE_BEND) ? 0 : 2;
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/* Update limits if needed */
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{
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float lower = FLT_MAX;
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float upper = -FLT_MAX;
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for (i = 0; i < numVerts; i++) {
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float tmp[3];
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copy_v3_v3(tmp, vertexCos[i]);
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if (transf) {
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BLI_space_transform_apply(transf, tmp);
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}
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lower = min_ff(lower, tmp[limit_axis]);
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upper = max_ff(upper, tmp[limit_axis]);
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}
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/* SMD values are normalized to the BV, calculate the absolut values */
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smd_limit[1] = lower + (upper - lower) * smd->limit[1];
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smd_limit[0] = lower + (upper - lower) * smd->limit[0];
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smd_factor = smd->factor / max_ff(FLT_EPSILON, smd_limit[1] - smd_limit[0]);
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}
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switch (smd->mode) {
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case MOD_SIMPLEDEFORM_MODE_TWIST: simpleDeform_callback = simpleDeform_twist; break;
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case MOD_SIMPLEDEFORM_MODE_BEND: simpleDeform_callback = simpleDeform_bend; break;
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case MOD_SIMPLEDEFORM_MODE_TAPER: simpleDeform_callback = simpleDeform_taper; break;
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case MOD_SIMPLEDEFORM_MODE_STRETCH: simpleDeform_callback = simpleDeform_stretch; break;
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default:
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return; /* No simpledeform mode? */
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}
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if (smd->mode == MOD_SIMPLEDEFORM_MODE_BEND) {
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if (fabsf(smd_factor) < BEND_EPS) {
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return;
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}
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}
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modifier_get_vgroup(ob, dm, smd->vgroup_name, &dvert, &vgroup);
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const bool invert_vgroup = (smd->flag & MOD_SIMPLEDEFORM_FLAG_INVERT_VGROUP) != 0;
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for (i = 0; i < numVerts; i++) {
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float weight = defvert_array_find_weight_safe(dvert, i, vgroup);
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if (invert_vgroup) {
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weight = 1.0f - weight;
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}
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if (weight != 0.0f) {
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float co[3], dcut[3] = {0.0f, 0.0f, 0.0f};
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if (transf) {
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BLI_space_transform_apply(transf, vertexCos[i]);
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}
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copy_v3_v3(co, vertexCos[i]);
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/* Apply axis limits */
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if (smd->mode != MOD_SIMPLEDEFORM_MODE_BEND) { /* Bend mode shoulnt have any lock axis */
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if (smd->axis & MOD_SIMPLEDEFORM_LOCK_AXIS_X) axis_limit(0, lock_axis, co, dcut);
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if (smd->axis & MOD_SIMPLEDEFORM_LOCK_AXIS_Y) axis_limit(1, lock_axis, co, dcut);
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}
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axis_limit(limit_axis, smd_limit, co, dcut);
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simpleDeform_callback(smd_factor, dcut, co); /* apply deform */
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interp_v3_v3v3(vertexCos[i], vertexCos[i], co, weight); /* Use vertex weight has coef of linear interpolation */
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if (transf) {
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BLI_space_transform_invert(transf, vertexCos[i]);
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}
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}
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}
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}
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/* SimpleDeform */
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static void initData(ModifierData *md)
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{
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SimpleDeformModifierData *smd = (SimpleDeformModifierData *) md;
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smd->mode = MOD_SIMPLEDEFORM_MODE_TWIST;
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smd->axis = 0;
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smd->origin = NULL;
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smd->factor = DEG2RADF(45.0f);
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smd->limit[0] = 0.0f;
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smd->limit[1] = 1.0f;
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}
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static void copyData(ModifierData *md, ModifierData *target)
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{
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#if 0
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SimpleDeformModifierData *smd = (SimpleDeformModifierData *)md;
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SimpleDeformModifierData *tsmd = (SimpleDeformModifierData *)target;
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#endif
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modifier_copyData_generic(md, target);
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}
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static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
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{
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SimpleDeformModifierData *smd = (SimpleDeformModifierData *)md;
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CustomDataMask dataMask = 0;
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/* ask for vertexgroups if we need them */
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if (smd->vgroup_name[0])
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dataMask |= CD_MASK_MDEFORMVERT;
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return dataMask;
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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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SimpleDeformModifierData *smd = (SimpleDeformModifierData *)md;
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walk(userData, ob, &smd->origin, IDWALK_CB_NOP);
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}
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static void updateDepsgraph(ModifierData *md,
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struct Main *UNUSED(bmain),
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struct Scene *UNUSED(scene),
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Object *UNUSED(ob),
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struct DepsNodeHandle *node)
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{
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SimpleDeformModifierData *smd = (SimpleDeformModifierData *)md;
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if (smd->origin != NULL) {
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DEG_add_object_relation(node, smd->origin, DEG_OB_COMP_TRANSFORM, "SimpleDeform Modifier");
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}
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}
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static void deformVerts(ModifierData *md, Object *ob,
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DerivedMesh *derivedData,
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float (*vertexCos)[3],
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int numVerts,
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ModifierApplyFlag UNUSED(flag))
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{
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DerivedMesh *dm = derivedData;
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CustomDataMask dataMask = requiredDataMask(ob, md);
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/* we implement requiredDataMask but thats not really useful since
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* mesh_calc_modifiers pass a NULL derivedData */
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if (dataMask)
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dm = get_dm(ob, NULL, dm, NULL, false, false);
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SimpleDeformModifier_do((SimpleDeformModifierData *)md, ob, dm, vertexCos, numVerts);
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if (dm != derivedData)
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dm->release(dm);
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}
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static void deformVertsEM(ModifierData *md, Object *ob,
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struct BMEditMesh *editData,
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DerivedMesh *derivedData,
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float (*vertexCos)[3],
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int numVerts)
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{
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DerivedMesh *dm = derivedData;
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CustomDataMask dataMask = requiredDataMask(ob, md);
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/* we implement requiredDataMask but thats not really useful since
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* mesh_calc_modifiers pass a NULL derivedData */
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if (dataMask)
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dm = get_dm(ob, editData, dm, NULL, false, false);
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SimpleDeformModifier_do((SimpleDeformModifierData *)md, ob, dm, vertexCos, numVerts);
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if (dm != derivedData)
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dm->release(dm);
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}
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ModifierTypeInfo modifierType_SimpleDeform = {
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/* name */ "SimpleDeform",
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/* structName */ "SimpleDeformModifierData",
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/* structSize */ sizeof(SimpleDeformModifierData),
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/* type */ eModifierTypeType_OnlyDeform,
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/* flags */ eModifierTypeFlag_AcceptsMesh |
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eModifierTypeFlag_AcceptsCVs |
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eModifierTypeFlag_AcceptsLattice |
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eModifierTypeFlag_SupportsEditmode |
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eModifierTypeFlag_EnableInEditmode,
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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 */ NULL,
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/* isDisabled */ NULL,
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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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