MOD_surface.c

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/*
 * 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.
 */
 
#include "BLI_utildefines.h"
 
#include "BLI_math.h"
 
#include "BLT_translation.h"
 
#include "DNA_defaults.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
 
#include "BKE_bvhutils.h"
#include "BKE_context.h"
#include "BKE_lib_id.h"
#include "BKE_mesh.h"
#include "BKE_screen.h"
 
#include "UI_interface.h"
#include "UI_resources.h"
 
#include "RNA_access.h"
 
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"
 
#include "MOD_modifiertypes.h"
#include "MOD_ui_common.h"
#include "MOD_util.h"
 
#include "BLO_read_write.h"
 
#include "MEM_guardedalloc.h"
 
static void initData(ModifierData *md)
{
  SurfaceModifierData *surmd = (SurfaceModifierData *)md;
 
  BLI_assert(MEMCMP_STRUCT_AFTER_IS_ZERO(surmd, modifier));
 
  MEMCPY_STRUCT_AFTER(surmd, DNA_struct_default_get(SurfaceModifierData), modifier);
}
 
static void copyData(const ModifierData *md_src, ModifierData *md_dst, const int flag)
{
  SurfaceModifierData *surmd_dst = (SurfaceModifierData *)md_dst;
 
  BKE_modifier_copydata_generic(md_src, md_dst, flag);
 
  surmd_dst->bvhtree = NULL;
  surmd_dst->mesh = NULL;
  surmd_dst->x = NULL;
  surmd_dst->v = NULL;
}
 
static void freeData(ModifierData *md)
{
  SurfaceModifierData *surmd = (SurfaceModifierData *)md;
 
  if (surmd) {
    if (surmd->bvhtree) {
      free_bvhtree_from_mesh(surmd->bvhtree);
      MEM_SAFE_FREE(surmd->bvhtree);
    }
 
    if (surmd->mesh) {
      BKE_id_free(NULL, surmd->mesh);
      surmd->mesh = NULL;
    }
 
    MEM_SAFE_FREE(surmd->x);
 
    MEM_SAFE_FREE(surmd->v);
  }
}
 
static bool dependsOnTime(ModifierData *UNUSED(md))
{
  return true;
}
 
static void deformVerts(ModifierData *md,
                        const ModifierEvalContext *ctx,
                        Mesh *mesh,
                        float (*vertexCos)[3],
                        int numVerts)
{
  SurfaceModifierData *surmd = (SurfaceModifierData *)md;
  const int cfra = (int)DEG_get_ctime(ctx->depsgraph);
 
  /* Free mesh and BVH cache. */
  if (surmd->bvhtree) {
    free_bvhtree_from_mesh(surmd->bvhtree);
    MEM_SAFE_FREE(surmd->bvhtree);
  }
 
  if (surmd->mesh) {
    BKE_id_free(NULL, surmd->mesh);
    surmd->mesh = NULL;
  }
 
  if (mesh) {
    /* Not possible to use get_mesh() in this case as we'll modify its vertices
     * and get_mesh() would return 'mesh' directly. */
    surmd->mesh = (Mesh *)BKE_id_copy_ex(NULL, (ID *)mesh, NULL, LIB_ID_COPY_LOCALIZE);
  }
  else {
    surmd->mesh = MOD_deform_mesh_eval_get(ctx->object, NULL, NULL, NULL, numVerts, false, false);
  }
 
  if (!ctx->object->pd) {
    printf("SurfaceModifier deformVerts: Should not happen!\n");
    return;
  }
 
  if (surmd->mesh) {
    uint numverts = 0, i = 0;
    int init = 0;
    float *vec;
    MVert *x, *v;
 
    BKE_mesh_vert_coords_apply(surmd->mesh, vertexCos);
    BKE_mesh_calc_normals(surmd->mesh);
 
    numverts = surmd->mesh->totvert;
 
    if (numverts != surmd->numverts || surmd->x == NULL || surmd->v == NULL ||
        cfra != surmd->cfra + 1) {
      if (surmd->x) {
        MEM_freeN(surmd->x);
        surmd->x = NULL;
      }
      if (surmd->v) {
        MEM_freeN(surmd->v);
        surmd->v = NULL;
      }
 
      surmd->x = MEM_calloc_arrayN(numverts, sizeof(MVert), "MVert");
      surmd->v = MEM_calloc_arrayN(numverts, sizeof(MVert), "MVert");
 
      surmd->numverts = numverts;
 
      init = 1;
    }
 
    /* convert to global coordinates and calculate velocity */
    for (i = 0, x = surmd->x, v = surmd->v; i < numverts; i++, x++, v++) {
      vec = surmd->mesh->mvert[i].co;
      mul_m4_v3(ctx->object->obmat, vec);
 
      if (init) {
        v->co[0] = v->co[1] = v->co[2] = 0.0f;
      }
      else {
        sub_v3_v3v3(v->co, vec, x->co);
      }
 
      copy_v3_v3(x->co, vec);
    }
 
    surmd->cfra = cfra;
 
    surmd->bvhtree = MEM_callocN(sizeof(BVHTreeFromMesh), "BVHTreeFromMesh");
 
    if (surmd->mesh->totpoly) {
      BKE_bvhtree_from_mesh_get(surmd->bvhtree, surmd->mesh, BVHTREE_FROM_LOOPTRI, 2);
    }
    else {
      BKE_bvhtree_from_mesh_get(surmd->bvhtree, surmd->mesh, BVHTREE_FROM_EDGES, 2);
    }
  }
}
 
static void panel_draw(const bContext *UNUSED(C), Panel *panel)
{
  uiLayout *layout = panel->layout;
 
  PointerRNA *ptr = modifier_panel_get_property_pointers(panel, NULL);
 
  uiItemL(layout, IFACE_("Settings are inside the Physics tab"), ICON_NONE);
 
  modifier_panel_end(layout, ptr);
}
 
static void panelRegister(ARegionType *region_type)
{
  modifier_panel_register(region_type, eModifierType_Surface, panel_draw);
}
 
static void blendRead(BlendDataReader *UNUSED(reader), ModifierData *md)
{
  SurfaceModifierData *surmd = (SurfaceModifierData *)md;
 
  surmd->mesh = NULL;
  surmd->bvhtree = NULL;
  surmd->x = NULL;
  surmd->v = NULL;
  surmd->numverts = 0;
}
 
ModifierTypeInfo modifierType_Surface = {
    /* name */ "Surface",
    /* structName */ "SurfaceModifierData",
    /* structSize */ sizeof(SurfaceModifierData),
    /* srna */ &RNA_SurfaceModifier,
    /* type */ eModifierTypeType_OnlyDeform,
    /* flags */ eModifierTypeFlag_AcceptsMesh | eModifierTypeFlag_AcceptsCVs |
        eModifierTypeFlag_NoUserAdd,
    /* icon */ ICON_MOD_PHYSICS,
 
    /* copyData */ copyData,
 
    /* deformVerts */ deformVerts,
    /* deformMatrices */ NULL,
    /* deformVertsEM */ NULL,
    /* deformMatricesEM */ NULL,
    /* modifyMesh */ NULL,
    /* modifyHair */ NULL,
    /* modifyGeometrySet */ NULL,
    /* modifyVolume */ NULL,
 
    /* initData */ initData,
    /* requiredDataMask */ NULL,
    /* freeData */ freeData,
    /* isDisabled */ NULL,
    /* updateDepsgraph */ NULL,
    /* dependsOnTime */ dependsOnTime,
    /* dependsOnNormals */ NULL,
    /* foreachIDLink */ NULL,
    /* foreachTexLink */ NULL,
    /* freeRuntimeData */ NULL,
    /* panelRegister */ panelRegister,
    /* blendWrite */ NULL,
    /* blendRead */ blendRead,
};