rna_key.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.
 */
 
#include <stdlib.h>
 
#include "DNA_ID.h"
#include "DNA_curve_types.h"
#include "DNA_key_types.h"
#include "DNA_lattice_types.h"
#include "DNA_mesh_types.h"
#include "DNA_scene_types.h"
 
#include "BLI_math.h"
#include "BLI_utildefines.h"
 
#include "BLT_translation.h"
 
#include "RNA_access.h"
#include "RNA_define.h"
#include "RNA_enum_types.h"
 
#include "MEM_guardedalloc.h"
 
#include "rna_internal.h"
 
#ifdef RNA_RUNTIME
 
#  include <stddef.h>
 
#  include "DNA_object_types.h"
 
#  include "BLI_listbase.h"
#  include "BLI_string_utils.h"
 
#  include "BKE_animsys.h"
#  include "BKE_key.h"
#  include "BKE_main.h"
 
#  include "DEG_depsgraph.h"
 
#  include "WM_api.h"
#  include "WM_types.h"
 
static Key *rna_ShapeKey_find_key(ID *id)
{
  switch (GS(id->name)) {
    case ID_CU:
      return ((Curve *)id)->key;
    case ID_KE:
      return (Key *)id;
    case ID_LT:
      return ((Lattice *)id)->key;
    case ID_ME:
      return ((Mesh *)id)->key;
    case ID_OB:
      return BKE_key_from_object((Object *)id);
    default:
      return NULL;
  }
}
 
static void rna_ShapeKey_name_set(PointerRNA *ptr, const char *value)
{
  KeyBlock *kb = ptr->data;
  char oldname[sizeof(kb->name)];
 
  /* make a copy of the old name first */
  BLI_strncpy(oldname, kb->name, sizeof(kb->name));
 
  /* copy the new name into the name slot */
  BLI_strncpy_utf8(kb->name, value, sizeof(kb->name));
 
  /* make sure the name is truly unique */
  if (ptr->owner_id) {
    Key *key = rna_ShapeKey_find_key(ptr->owner_id);
    BLI_uniquename(&key->block,
                   kb,
                   CTX_DATA_(BLT_I18NCONTEXT_ID_SHAPEKEY, "Key"),
                   '.',
                   offsetof(KeyBlock, name),
                   sizeof(kb->name));
  }
 
  /* fix all the animation data which may link to this */
  BKE_animdata_fix_paths_rename_all(NULL, "key_blocks", oldname, kb->name);
}
 
static float rna_ShapeKey_frame_get(PointerRNA *ptr)
{
  KeyBlock *kb = (KeyBlock *)ptr->data;
  return kb->pos * 100.0f; /* Because pos is ctime/100... */
}
 
static void rna_ShapeKey_value_set(PointerRNA *ptr, float value)
{
  KeyBlock *data = (KeyBlock *)ptr->data;
  CLAMP(value, data->slidermin, data->slidermax);
  data->curval = value;
}
 
static void rna_ShapeKey_value_range(
    PointerRNA *ptr, float *min, float *max, float *UNUSED(softmin), float *UNUSED(softmax))
{
  KeyBlock *data = (KeyBlock *)ptr->data;
 
  *min = data->slidermin;
  *max = data->slidermax;
}
 
/* epsilon for how close one end of shapekey range can get to the other */
#  define SHAPEKEY_SLIDER_TOL 0.001f
 
static void rna_ShapeKey_slider_min_range(
    PointerRNA *ptr, float *min, float *max, float *UNUSED(softmin), float *UNUSED(softmax))
{
  KeyBlock *data = (KeyBlock *)ptr->data;
 
  *min = -10.0f;
  *max = data->slidermax - SHAPEKEY_SLIDER_TOL;
}
 
static void rna_ShapeKey_slider_min_set(PointerRNA *ptr, float value)
{
  KeyBlock *data = (KeyBlock *)ptr->data;
  float min, max, softmin, softmax;
 
  rna_ShapeKey_slider_min_range(ptr, &min, &max, &softmin, &softmax);
  CLAMP(value, min, max);
  data->slidermin = value;
}
 
static void rna_ShapeKey_slider_max_range(
    PointerRNA *ptr, float *min, float *max, float *UNUSED(softmin), float *UNUSED(softmax))
{
  KeyBlock *data = (KeyBlock *)ptr->data;
 
  *min = data->slidermin + SHAPEKEY_SLIDER_TOL;
  *max = 10.0f;
}
 
static void rna_ShapeKey_slider_max_set(PointerRNA *ptr, float value)
{
  KeyBlock *data = (KeyBlock *)ptr->data;
  float min, max, softmin, softmax;
 
  rna_ShapeKey_slider_max_range(ptr, &min, &max, &softmin, &softmax);
  CLAMP(value, min, max);
  data->slidermax = value;
}
 
#  undef SHAPEKEY_SLIDER_TOL
 
/* ***** Normals accessors for shapekeys. ***** */
/* Note: with this we may recompute several times the same data, should we want to access verts,
 *       then polys, then loops normals... However,
 *       such case looks rather unlikely - and not worth adding some kind of caching in KeyBlocks.
 */
 
static Mesh *rna_KeyBlock_normals_get_mesh(PointerRNA *ptr, ID *id)
{
  Key *key = rna_ShapeKey_find_key((id == NULL && ptr != NULL) ? ptr->owner_id : id);
  id = key ? key->from : NULL;
 
  if (id != NULL) {
    switch (GS(id->name)) {
      case ID_ME:
        return (Mesh *)id;
      case ID_OB: {
        Object *ob = (Object *)id;
        if (ob->type == OB_MESH) {
          return ob->data;
        }
      }
      default:
        break;
    }
  }
 
  return NULL;
}
 
static int rna_KeyBlock_normals_vert_len(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
{
  Mesh *me = rna_KeyBlock_normals_get_mesh(ptr, NULL);
 
  length[0] = me ? me->totvert : 0;
  length[1] = 3;
 
  return (length[0] * length[1]);
}
 
static void rna_KeyBlock_normals_vert_calc(ID *id,
                                           KeyBlock *data,
                                           int *normals_len,
                                           float **normals)
{
  Mesh *me = rna_KeyBlock_normals_get_mesh(NULL, id);
 
  *normals_len = (me ? me->totvert : 0) * 3;
 
  if (ELEM(NULL, me, data) || (me->totvert == 0)) {
    *normals = NULL;
    return;
  }
 
  *normals = MEM_mallocN(sizeof(**normals) * (size_t)(*normals_len), __func__);
 
  BKE_keyblock_mesh_calc_normals(data, me, (float(*)[3])(*normals), NULL, NULL);
}
 
static int rna_KeyBlock_normals_poly_len(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
{
  Mesh *me = rna_KeyBlock_normals_get_mesh(ptr, NULL);
 
  length[0] = me ? me->totpoly : 0;
  length[1] = 3;
 
  return (length[0] * length[1]);
}
 
static void rna_KeyBlock_normals_poly_calc(ID *id,
                                           KeyBlock *data,
                                           int *normals_len,
                                           float **normals)
{
  Mesh *me = rna_KeyBlock_normals_get_mesh(NULL, id);
 
  *normals_len = (me ? me->totpoly : 0) * 3;
 
  if (ELEM(NULL, me, data) || (me->totpoly == 0)) {
    *normals = NULL;
    return;
  }
 
  *normals = MEM_mallocN(sizeof(**normals) * (size_t)(*normals_len), __func__);
 
  BKE_keyblock_mesh_calc_normals(data, me, NULL, (float(*)[3])(*normals), NULL);
}
 
static int rna_KeyBlock_normals_loop_len(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
{
  Mesh *me = rna_KeyBlock_normals_get_mesh(ptr, NULL);
 
  length[0] = me ? me->totloop : 0;
  length[1] = 3;
 
  return (length[0] * length[1]);
}
 
static void rna_KeyBlock_normals_loop_calc(ID *id,
                                           KeyBlock *data,
                                           int *normals_len,
                                           float **normals)
{
  Mesh *me = rna_KeyBlock_normals_get_mesh(NULL, id);
 
  *normals_len = (me ? me->totloop : 0) * 3;
 
  if (ELEM(NULL, me, data) || (me->totloop == 0)) {
    *normals = NULL;
    return;
  }
 
  *normals = MEM_mallocN(sizeof(**normals) * (size_t)(*normals_len), __func__);
 
  BKE_keyblock_mesh_calc_normals(data, me, NULL, NULL, (float(*)[3])(*normals));
}
 
PointerRNA rna_object_shapekey_index_get(ID *id, int value)
{
  Key *key = rna_ShapeKey_find_key(id);
  KeyBlock *kb = NULL;
  PointerRNA ptr;
 
  if (key && value < key->totkey) {
    kb = BLI_findlink(&key->block, value);
  }
 
  RNA_pointer_create(id, &RNA_ShapeKey, kb, &ptr);
 
  return ptr;
}
 
int rna_object_shapekey_index_set(ID *id, PointerRNA value, int current)
{
  Key *key = rna_ShapeKey_find_key(id);
 
  if (key) {
    int a = BLI_findindex(&key->block, value.data);
    if (a != -1) {
      return a;
    }
  }
 
  return current;
}
 
static PointerRNA rna_ShapeKey_relative_key_get(PointerRNA *ptr)
{
  KeyBlock *kb = (KeyBlock *)ptr->data;
 
  return rna_object_shapekey_index_get(ptr->owner_id, kb->relative);
}
 
static void rna_ShapeKey_relative_key_set(PointerRNA *ptr,
                                          PointerRNA value,
                                          struct ReportList *UNUSED(reports))
{
  KeyBlock *kb = (KeyBlock *)ptr->data;
 
  kb->relative = rna_object_shapekey_index_set(ptr->owner_id, value, kb->relative);
}
 
static void rna_ShapeKeyPoint_co_get(PointerRNA *ptr, float *values)
{
  float *vec = (float *)ptr->data;
 
  values[0] = vec[0];
  values[1] = vec[1];
  values[2] = vec[2];
}
 
static void rna_ShapeKeyPoint_co_set(PointerRNA *ptr, const float *values)
{
  float *vec = (float *)ptr->data;
 
  vec[0] = values[0];
  vec[1] = values[1];
  vec[2] = values[2];
}
 
static float rna_ShapeKeyCurvePoint_tilt_get(PointerRNA *ptr)
{
  float *vec = (float *)ptr->data;
  return vec[3];
}
 
static void rna_ShapeKeyCurvePoint_tilt_set(PointerRNA *ptr, float value)
{
  float *vec = (float *)ptr->data;
  vec[3] = value;
}
 
static float rna_ShapeKeyCurvePoint_radius_get(PointerRNA *ptr)
{
  float *vec = (float *)ptr->data;
  return vec[4];
}
 
static void rna_ShapeKeyCurvePoint_radius_set(PointerRNA *ptr, float value)
{
  float *vec = (float *)ptr->data;
  CLAMP_MIN(value, 0.0f);
  vec[4] = value;
}
 
static void rna_ShapeKeyBezierPoint_co_get(PointerRNA *ptr, float *values)
{
  float *vec = (float *)ptr->data;
 
  values[0] = vec[0 + 3];
  values[1] = vec[1 + 3];
  values[2] = vec[2 + 3];
}
 
static void rna_ShapeKeyBezierPoint_co_set(PointerRNA *ptr, const float *values)
{
  float *vec = (float *)ptr->data;
 
  vec[0 + 3] = values[0];
  vec[1 + 3] = values[1];
  vec[2 + 3] = values[2];
}
 
static void rna_ShapeKeyBezierPoint_handle_1_co_get(PointerRNA *ptr, float *values)
{
  float *vec = (float *)ptr->data;
 
  values[0] = vec[0];
  values[1] = vec[1];
  values[2] = vec[2];
}
 
static void rna_ShapeKeyBezierPoint_handle_1_co_set(PointerRNA *ptr, const float *values)
{
  float *vec = (float *)ptr->data;
 
  vec[0] = values[0];
  vec[1] = values[1];
  vec[2] = values[2];
}
 
static void rna_ShapeKeyBezierPoint_handle_2_co_get(PointerRNA *ptr, float *values)
{
  float *vec = (float *)ptr->data;
 
  values[0] = vec[6 + 0];
  values[1] = vec[6 + 1];
  values[2] = vec[6 + 2];
}
 
static void rna_ShapeKeyBezierPoint_handle_2_co_set(PointerRNA *ptr, const float *values)
{
  float *vec = (float *)ptr->data;
 
  vec[6 + 0] = values[0];
  vec[6 + 1] = values[1];
  vec[6 + 2] = values[2];
}
 
static float rna_ShapeKeyBezierPoint_tilt_get(PointerRNA *ptr)
{
  float *vec = (float *)ptr->data;
  return vec[9];
}
 
static void rna_ShapeKeyBezierPoint_tilt_set(PointerRNA *ptr, float value)
{
  float *vec = (float *)ptr->data;
  vec[9] = value;
}
 
static float rna_ShapeKeyBezierPoint_radius_get(PointerRNA *ptr)
{
  float *vec = (float *)ptr->data;
  return vec[10];
}
 
static void rna_ShapeKeyBezierPoint_radius_set(PointerRNA *ptr, float value)
{
  float *vec = (float *)ptr->data;
  CLAMP_MIN(value, 0.0f);
  vec[10] = value;
}
 
/* Indexing and iteration of Curve points through sub-curves. */
typedef struct NurbInfo {
  Nurb *nu;
  int nurb_size, nurb_elem_step;
 
  /* Current index in the Nurb */
  int nurb_index;
 
  /* Total index as item and element. */
  int item_index, elem_index;
} NurbInfo;
 
StructRNA *rna_ShapeKey_curve_point_type(Nurb *nu)
{
  if (nu->bezt) {
    return &RNA_ShapeKeyBezierPoint;
  }
  else {
    return &RNA_ShapeKeyCurvePoint;
  }
}
 
static void rna_ShapeKey_NurbInfo_init(NurbInfo *r_info, Nurb *nu)
{
  r_info->nu = nu;
 
  if (nu->bezt) {
    r_info->nurb_size = nu->pntsu;
    r_info->nurb_elem_step = KEYELEM_ELEM_LEN_BEZTRIPLE;
  }
  else {
    r_info->nurb_size = nu->pntsu * nu->pntsv;
    r_info->nurb_elem_step = KEYELEM_ELEM_LEN_BPOINT;
  }
}
 
static void rna_ShapeKey_NurbInfo_step(NurbInfo *r_info,
                                       Nurb *nu,
                                       int *p_raw_index,
                                       bool input_elem)
{
  rna_ShapeKey_NurbInfo_init(r_info, nu);
 
  if (input_elem) {
    r_info->nurb_index = MIN2(r_info->nurb_size, *p_raw_index / r_info->nurb_elem_step);
    *p_raw_index -= r_info->nurb_size * r_info->nurb_elem_step;
  }
  else {
    r_info->nurb_index = MIN2(r_info->nurb_size, *p_raw_index);
    *p_raw_index -= r_info->nurb_size;
  }
 
  r_info->item_index += r_info->nurb_index;
  r_info->elem_index += r_info->nurb_index * r_info->nurb_elem_step;
}
 
static void rna_ShapeKey_NurbInfo_find_index(Key *key,
                                             int raw_index,
                                             bool input_elem,
                                             NurbInfo *r_info)
{
  Curve *cu = (Curve *)key->from;
 
  memset(r_info, 0, sizeof(*r_info));
 
  for (Nurb *nu = cu->nurb.first; nu && raw_index >= 0; nu = nu->next) {
    rna_ShapeKey_NurbInfo_step(r_info, nu, &raw_index, input_elem);
  }
}
 
static int rna_ShapeKey_curve_find_index(Key *key, int elem_index)
{
  NurbInfo info;
  rna_ShapeKey_NurbInfo_find_index(key, elem_index, true, &info);
  return info.item_index;
}
 
typedef struct ShapeKeyCurvePoint {
  StructRNA *type;
  void *data;
} ShapeKeyCurvePoint;
 
/* Build a mapping array for Curve objects with mixed sub-curve types. */
static void rna_ShapeKey_data_begin_mixed(CollectionPropertyIterator *iter,
                                          Key *key,
                                          KeyBlock *kb,
                                          Curve *cu)
{
  int point_count = rna_ShapeKey_curve_find_index(key, kb->totelem);
 
  ShapeKeyCurvePoint *points = MEM_malloc_arrayN(
      sizeof(ShapeKeyCurvePoint), point_count, __func__);
 
  char *databuf = kb->data;
  int items_left = point_count;
  NurbInfo info = {NULL};
 
  for (Nurb *nu = cu->nurb.first; nu && items_left > 0; nu = nu->next) {
    ShapeKeyCurvePoint *nurb_points = points + info.item_index;
    char *nurb_data = databuf + info.elem_index * key->elemsize;
 
    rna_ShapeKey_NurbInfo_step(&info, nu, &items_left, false);
 
    StructRNA *type = rna_ShapeKey_curve_point_type(nu);
 
    for (int i = 0; i < info.nurb_index; i++) {
      nurb_points[i].type = type;
      nurb_points[i].data = nurb_data + i * info.nurb_elem_step * key->elemsize;
    }
  }
 
  rna_iterator_array_begin(iter, points, sizeof(*points), point_count, true, NULL);
}
 
static void rna_ShapeKey_data_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
{
  Key *key = rna_ShapeKey_find_key(ptr->owner_id);
  KeyBlock *kb = (KeyBlock *)ptr->data;
  int tot = kb->totelem, size = key->elemsize;
 
  if (GS(key->from->name) == ID_CU && tot > 0) {
    Curve *cu = (Curve *)key->from;
    StructRNA *type = NULL;
    NurbInfo info = {0};
 
    /* Check if all sub-curves have the same type. */
    LISTBASE_FOREACH (Nurb *, nu, &cu->nurb) {
      if (type == NULL) {
        type = rna_ShapeKey_curve_point_type(nu);
        rna_ShapeKey_NurbInfo_init(&info, nu);
      }
      else if (type != rna_ShapeKey_curve_point_type(nu)) {
        type = NULL;
        break;
      }
    }
 
    /* If types are mixed, build a mapping array. */
    if (type == NULL) {
      rna_ShapeKey_data_begin_mixed(iter, key, kb, cu);
      return;
    }
    else {
      tot /= info.nurb_elem_step;
      size *= info.nurb_elem_step;
    }
  }
 
  rna_iterator_array_begin(iter, (void *)kb->data, size, tot, 0, NULL);
}
 
static int rna_ShapeKey_data_length(PointerRNA *ptr)
{
  Key *key = rna_ShapeKey_find_key(ptr->owner_id);
  KeyBlock *kb = (KeyBlock *)ptr->data;
  int tot = kb->totelem;
 
  if (GS(key->from->name) == ID_CU) {
    tot = rna_ShapeKey_curve_find_index(key, tot);
  }
 
  return tot;
}
 
static PointerRNA rna_ShapeKey_data_get(CollectionPropertyIterator *iter)
{
  Key *key = rna_ShapeKey_find_key(iter->parent.owner_id);
  void *ptr = rna_iterator_array_get(iter);
  StructRNA *type = &RNA_ShapeKeyPoint;
 
  /* If data_begin allocated a mapping array, access it. */
  if (iter->internal.array.free_ptr) {
    ShapeKeyCurvePoint *point = ptr;
 
    return rna_pointer_inherit_refine(&iter->parent, point->type, point->data);
  }
 
  if (GS(key->from->name) == ID_CU) {
    Curve *cu = (Curve *)key->from;
 
    type = rna_ShapeKey_curve_point_type(cu->nurb.first);
  }
 
  return rna_pointer_inherit_refine(&iter->parent, type, ptr);
}
 
int rna_ShapeKey_data_lookup_int(PointerRNA *ptr, int index, PointerRNA *r_ptr)
{
  Key *key = rna_ShapeKey_find_key(ptr->owner_id);
  KeyBlock *kb = (KeyBlock *)ptr->data;
  int elemsize = key->elemsize;
  char *databuf = kb->data;
 
  memset(r_ptr, 0, sizeof(*r_ptr));
 
  if (index < 0) {
    return false;
  }
 
  if (GS(key->from->name) == ID_CU) {
    NurbInfo info;
    rna_ShapeKey_NurbInfo_find_index(key, index, false, &info);
 
    if (info.nu && info.nurb_index < info.nurb_size) {
      StructRNA *type = rna_ShapeKey_curve_point_type(info.nu);
 
      *r_ptr = rna_pointer_inherit_refine(ptr, type, databuf + elemsize * info.elem_index);
      return true;
    }
  }
  else {
    if (index < kb->totelem) {
      *r_ptr = rna_pointer_inherit_refine(ptr, &RNA_ShapeKeyPoint, databuf + elemsize * index);
      return true;
    }
  }
 
  return false;
}
 
static char *rna_ShapeKey_path(PointerRNA *ptr)
{
  KeyBlock *kb = (KeyBlock *)ptr->data;
  ID *id = ptr->owner_id;
  char name_esc[sizeof(kb->name) * 2];
 
  BLI_str_escape(name_esc, kb->name, sizeof(name_esc));
 
  if ((id) && (GS(id->name) != ID_KE)) {
    return BLI_sprintfN("shape_keys.key_blocks[\"%s\"]", name_esc);
  }
  else {
    return BLI_sprintfN("key_blocks[\"%s\"]", name_esc);
  }
}
 
static void rna_Key_update_data(Main *bmain, Scene *UNUSED(scene), PointerRNA *ptr)
{
  Key *key = (Key *)ptr->owner_id;
  Object *ob;
 
  for (ob = bmain->objects.first; ob; ob = ob->id.next) {
    if (BKE_key_from_object(ob) == key) {
      DEG_id_tag_update(&ob->id, ID_RECALC_GEOMETRY);
      WM_main_add_notifier(NC_OBJECT | ND_MODIFIER, ob);
    }
  }
}
 
static void rna_ShapeKey_update_minmax(Main *bmain, Scene *scene, PointerRNA *ptr)
{
  KeyBlock *data = (KeyBlock *)ptr->data;
  if (IN_RANGE_INCL(data->curval, data->slidermin, data->slidermax)) {
    return;
  }
  CLAMP(data->curval, data->slidermin, data->slidermax);
  rna_Key_update_data(bmain, scene, ptr);
}
 
static KeyBlock *rna_ShapeKeyData_find_keyblock(Key *key, float *point)
{
  KeyBlock *kb;
 
  /* sanity checks */
  if (ELEM(NULL, key, point)) {
    return NULL;
  }
 
  /* We'll need to manually search through the key-blocks and check
   * if the point is somewhere in the middle of each block's data. */
  for (kb = key->block.first; kb; kb = kb->next) {
    if (kb->data) {
      float *start = (float *)kb->data;
      float *end;
 
      /* easy cases first */
      if ((start == NULL) || (start > point)) {
        /* there's no chance point is in array */
        continue;
      }
      else if (start == point) {
        /* exact match - point is first in array */
        return kb;
      }
 
      /* determine where end of array is
       * - elemsize is in bytes, so use (char *) cast to get array in terms of bytes
       */
      end = (float *)((char *)start + (key->elemsize * kb->totelem));
 
      /* If point's address is less than the end,
       * then it is somewhere between start and end, so in array. */
      if (end > point) {
        /* we've found the owner of the point data */
        return kb;
      }
    }
  }
 
  return NULL;
}
 
static int rna_ShapeKeyPoint_get_index(Key *key, KeyBlock *kb, float *point)
{
  /* if we frame the data array and point pointers as (char *), then the difference between
   * them will be in bytes. Thus, dividing through by key->elemsize (number of bytes per point)
   * gives us the offset of point from start of array.
   */
  char *start = (char *)kb->data;
  char *pt = (char *)point;
 
  return (int)(pt - start) / key->elemsize;
}
 
static char *rna_ShapeKeyPoint_path(PointerRNA *ptr)
{
  ID *id = ptr->owner_id;
  Key *key = rna_ShapeKey_find_key(ptr->owner_id);
  KeyBlock *kb;
  float *point = (float *)ptr->data;
 
  /* if we can get a key block, we can construct a path */
  kb = rna_ShapeKeyData_find_keyblock(key, point);
 
  if (kb) {
    char name_esc_kb[sizeof(kb->name) * 2];
    int index;
 
    index = rna_ShapeKeyPoint_get_index(key, kb, point);
 
    if (ELEM(ptr->type, &RNA_ShapeKeyBezierPoint, &RNA_ShapeKeyCurvePoint)) {
      index = rna_ShapeKey_curve_find_index(key, index);
    }
 
    BLI_str_escape(name_esc_kb, kb->name, sizeof(name_esc_kb));
 
    if (GS(id->name) == ID_KE) {
      return BLI_sprintfN("key_blocks[\"%s\"].data[%d]", name_esc_kb, index);
    }
    else {
      return BLI_sprintfN("shape_keys.key_blocks[\"%s\"].data[%d]", name_esc_kb, index);
    }
  }
  else {
    return NULL; /* XXX: there's really no way to resolve this... */
  }
}
 
#else
 
const EnumPropertyItem rna_enum_keyblock_type_items[] = {
    {KEY_LINEAR, "KEY_LINEAR", 0, "Linear", ""},
    {KEY_CARDINAL, "KEY_CARDINAL", 0, "Cardinal", ""},
    {KEY_CATMULL_ROM, "KEY_CATMULL_ROM", 0, "Catmull-Rom", ""},
    {KEY_BSPLINE, "KEY_BSPLINE", 0, "BSpline", ""},
    {0, NULL, 0, NULL, NULL},
};
 
static const float tilt_limit = DEG2RADF(21600.0f);
 
static void rna_def_keydata(BlenderRNA *brna)
{
  StructRNA *srna;
  PropertyRNA *prop;
 
  srna = RNA_def_struct(brna, "ShapeKeyPoint", NULL);
  RNA_def_struct_ui_text(srna, "Shape Key Point", "Point in a shape key");
  RNA_def_struct_path_func(srna, "rna_ShapeKeyPoint_path");
 
  prop = RNA_def_property(srna, "co", PROP_FLOAT, PROP_TRANSLATION);
  RNA_def_property_array(prop, 3);
  RNA_def_property_float_funcs(prop, "rna_ShapeKeyPoint_co_get", "rna_ShapeKeyPoint_co_set", NULL);
  RNA_def_property_ui_text(prop, "Location", "");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  srna = RNA_def_struct(brna, "ShapeKeyCurvePoint", NULL);
  RNA_def_struct_ui_text(srna, "Shape Key Curve Point", "Point in a shape key for curves");
  /* there's nothing type specific here, so this is fine for now */
  RNA_def_struct_path_func(srna, "rna_ShapeKeyPoint_path");
 
  prop = RNA_def_property(srna, "co", PROP_FLOAT, PROP_TRANSLATION);
  RNA_def_property_array(prop, 3);
  RNA_def_property_float_funcs(prop, "rna_ShapeKeyPoint_co_get", "rna_ShapeKeyPoint_co_set", NULL);
  RNA_def_property_ui_text(prop, "Location", "");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "tilt", PROP_FLOAT, PROP_ANGLE);
  RNA_def_property_float_funcs(
      prop, "rna_ShapeKeyCurvePoint_tilt_get", "rna_ShapeKeyCurvePoint_tilt_set", NULL);
  RNA_def_property_range(prop, -tilt_limit, tilt_limit);
  RNA_def_property_ui_range(prop, -tilt_limit, tilt_limit, 10, 3);
  RNA_def_property_ui_text(prop, "Tilt", "Tilt in 3D View");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "radius", PROP_FLOAT, PROP_NONE);
  RNA_def_property_float_funcs(
      prop, "rna_ShapeKeyCurvePoint_radius_get", "rna_ShapeKeyCurvePoint_radius_set", NULL);
  RNA_def_property_range(prop, 0.0f, FLT_MAX);
  RNA_def_property_ui_text(prop, "Radius", "Radius for beveling");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  srna = RNA_def_struct(brna, "ShapeKeyBezierPoint", NULL);
  RNA_def_struct_ui_text(srna, "Shape Key Bezier Point", "Point in a shape key for Bezier curves");
  /* there's nothing type specific here, so this is fine for now */
  RNA_def_struct_path_func(srna, "rna_ShapeKeyPoint_path");
 
  prop = RNA_def_property(srna, "co", PROP_FLOAT, PROP_TRANSLATION);
  RNA_def_property_array(prop, 3);
  RNA_def_property_float_funcs(
      prop, "rna_ShapeKeyBezierPoint_co_get", "rna_ShapeKeyBezierPoint_co_set", NULL);
  RNA_def_property_ui_text(prop, "Location", "");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "handle_left", PROP_FLOAT, PROP_TRANSLATION);
  RNA_def_property_array(prop, 3);
  RNA_def_property_float_funcs(prop,
                               "rna_ShapeKeyBezierPoint_handle_1_co_get",
                               "rna_ShapeKeyBezierPoint_handle_1_co_set",
                               NULL);
  RNA_def_property_ui_text(prop, "Handle 1 Location", "");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "handle_right", PROP_FLOAT, PROP_TRANSLATION);
  RNA_def_property_array(prop, 3);
  RNA_def_property_float_funcs(prop,
                               "rna_ShapeKeyBezierPoint_handle_2_co_get",
                               "rna_ShapeKeyBezierPoint_handle_2_co_set",
                               NULL);
  RNA_def_property_ui_text(prop, "Handle 2 Location", "");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "tilt", PROP_FLOAT, PROP_ANGLE);
  RNA_def_property_float_funcs(
      prop, "rna_ShapeKeyBezierPoint_tilt_get", "rna_ShapeKeyBezierPoint_tilt_set", NULL);
  RNA_def_property_range(prop, -tilt_limit, tilt_limit);
  RNA_def_property_ui_range(prop, -tilt_limit, tilt_limit, 10, 3);
  RNA_def_property_ui_text(prop, "Tilt", "Tilt in 3D View");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "radius", PROP_FLOAT, PROP_NONE);
  RNA_def_property_float_funcs(
      prop, "rna_ShapeKeyBezierPoint_radius_get", "rna_ShapeKeyBezierPoint_radius_set", NULL);
  RNA_def_property_range(prop, 0.0f, FLT_MAX);
  RNA_def_property_ui_text(prop, "Radius", "Radius for beveling");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
}
 
static void rna_def_keyblock(BlenderRNA *brna)
{
  StructRNA *srna;
  PropertyRNA *prop, *parm;
  FunctionRNA *func;
 
  srna = RNA_def_struct(brna, "ShapeKey", NULL);
  RNA_def_struct_ui_text(srna, "Shape Key", "Shape key in a shape keys data-block");
  RNA_def_struct_sdna(srna, "KeyBlock");
  RNA_def_struct_path_func(srna, "rna_ShapeKey_path");
  RNA_def_struct_ui_icon(srna, ICON_SHAPEKEY_DATA);
 
  prop = RNA_def_property(srna, "name", PROP_STRING, PROP_NONE);
  RNA_def_property_ui_text(prop, "Name", "Name of Shape Key");
  RNA_def_property_string_funcs(prop, NULL, NULL, "rna_ShapeKey_name_set");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
  RNA_def_struct_name_property(srna, prop);
 
  /* keys need to be sorted to edit this */
  prop = RNA_def_property(srna, "frame", PROP_FLOAT, PROP_TIME);
  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
  RNA_def_property_float_sdna(prop, NULL, "pos");
  RNA_def_property_float_funcs(prop, "rna_ShapeKey_frame_get", NULL, NULL);
  RNA_def_property_ui_text(prop, "Frame", "Frame for absolute keys");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  /* for now, this is editable directly, as users can set this even if they're not animating them
   * (to test results) */
  prop = RNA_def_property(srna, "value", PROP_FLOAT, PROP_FACTOR);
  RNA_def_property_float_sdna(prop, NULL, "curval");
  RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
  RNA_def_property_float_funcs(prop, NULL, "rna_ShapeKey_value_set", "rna_ShapeKey_value_range");
  RNA_def_property_ui_range(prop, -10.0f, 10.0f, 10, 3);
  RNA_def_property_ui_text(prop, "Value", "Value of shape key at the current frame");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "interpolation", PROP_ENUM, PROP_NONE);
  RNA_def_property_enum_sdna(prop, NULL, "type");
  RNA_def_property_enum_items(prop, rna_enum_keyblock_type_items);
  RNA_def_property_ui_text(prop, "Interpolation", "Interpolation type for absolute shape keys");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "vertex_group", PROP_STRING, PROP_NONE);
  RNA_def_property_string_sdna(prop, NULL, "vgroup");
  RNA_def_property_ui_text(prop, "Vertex Group", "Vertex weight group, to blend with basis shape");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "relative_key", PROP_POINTER, PROP_NONE);
  RNA_def_property_struct_type(prop, "ShapeKey");
  RNA_def_property_flag(prop, PROP_EDITABLE | PROP_NEVER_NULL | PROP_PTR_NO_OWNERSHIP);
  RNA_def_property_pointer_funcs(
      prop, "rna_ShapeKey_relative_key_get", "rna_ShapeKey_relative_key_set", NULL, NULL);
  RNA_def_property_ui_text(prop, "Relative Key", "Shape used as a relative key");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "mute", PROP_BOOLEAN, PROP_NONE);
  RNA_def_property_boolean_sdna(prop, NULL, "flag", KEYBLOCK_MUTE);
  RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
  RNA_def_property_ui_text(prop, "Mute", "Toggle this shape key");
  RNA_def_property_ui_icon(prop, ICON_CHECKBOX_HLT, -1);
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "slider_min", PROP_FLOAT, PROP_NONE);
  RNA_def_property_float_sdna(prop, NULL, "slidermin");
  RNA_def_property_range(prop, -10.0f, 10.0f);
  RNA_def_property_float_funcs(
      prop, NULL, "rna_ShapeKey_slider_min_set", "rna_ShapeKey_slider_min_range");
  RNA_def_property_ui_text(prop, "Slider Min", "Minimum for slider");
  RNA_def_property_update(prop, 0, "rna_ShapeKey_update_minmax");
 
  prop = RNA_def_property(srna, "slider_max", PROP_FLOAT, PROP_NONE);
  RNA_def_property_float_sdna(prop, NULL, "slidermax");
  RNA_def_property_range(prop, -10.0f, 10.0f);
  RNA_def_property_float_default(prop, 1.0f);
  RNA_def_property_float_funcs(
      prop, NULL, "rna_ShapeKey_slider_max_set", "rna_ShapeKey_slider_max_range");
  RNA_def_property_ui_text(prop, "Slider Max", "Maximum for slider");
  RNA_def_property_update(prop, 0, "rna_ShapeKey_update_minmax");
 
  prop = RNA_def_property(srna, "data", PROP_COLLECTION, PROP_NONE);
  RNA_def_property_collection_sdna(prop, NULL, "data", "totelem");
  RNA_def_property_struct_type(prop, "UnknownType");
  RNA_def_property_override_flag(prop, PROPOVERRIDE_IGNORE);
  RNA_def_property_ui_text(prop, "Data", "");
  RNA_def_property_collection_funcs(prop,
                                    "rna_ShapeKey_data_begin",
                                    NULL,
                                    NULL,
                                    "rna_ShapeKey_data_get",
                                    "rna_ShapeKey_data_length",
                                    "rna_ShapeKey_data_lookup_int",
                                    NULL,
                                    NULL);
 
  /* XXX multi-dim dynamic arrays are very badly supported by (py)rna currently,
   *     those are defined for the day it works better, for now user will get a 1D tuple.
   */
  func = RNA_def_function(srna, "normals_vertex_get", "rna_KeyBlock_normals_vert_calc");
  RNA_def_function_ui_description(func,
                                  "Compute local space vertices' normals for this shape key");
  RNA_def_function_flag(func, FUNC_USE_SELF_ID);
  parm = RNA_def_property(func, "normals", PROP_FLOAT, /* PROP_DIRECTION */ PROP_NONE);
  RNA_def_parameter_flags(parm, PROP_DYNAMIC, PARM_OUTPUT);
  RNA_def_property_multi_array(parm, 2, NULL);
  RNA_def_property_range(parm, -1.0f, 1.0f);
  RNA_def_property_dynamic_array_funcs(parm, "rna_KeyBlock_normals_vert_len");
 
  func = RNA_def_function(srna, "normals_polygon_get", "rna_KeyBlock_normals_poly_calc");
  RNA_def_function_ui_description(func, "Compute local space faces' normals for this shape key");
  RNA_def_function_flag(func, FUNC_USE_SELF_ID);
  parm = RNA_def_property(func, "normals", PROP_FLOAT, /* PROP_DIRECTION */ PROP_NONE);
  RNA_def_parameter_flags(parm, PROP_DYNAMIC, PARM_OUTPUT);
  RNA_def_property_multi_array(parm, 2, NULL);
  RNA_def_property_range(parm, -1.0f, 1.0f);
  RNA_def_property_dynamic_array_funcs(parm, "rna_KeyBlock_normals_poly_len");
 
  func = RNA_def_function(srna, "normals_split_get", "rna_KeyBlock_normals_loop_calc");
  RNA_def_function_ui_description(func,
                                  "Compute local space face corners' normals for this shape key");
  RNA_def_function_flag(func, FUNC_USE_SELF_ID);
  parm = RNA_def_property(func, "normals", PROP_FLOAT, /* PROP_DIRECTION */ PROP_NONE);
  RNA_def_parameter_flags(parm, PROP_DYNAMIC, PARM_OUTPUT);
  RNA_def_property_multi_array(parm, 2, NULL);
  RNA_def_property_range(parm, -1.0f, 1.0f);
  RNA_def_property_dynamic_array_funcs(parm, "rna_KeyBlock_normals_loop_len");
}
 
static void rna_def_key(BlenderRNA *brna)
{
  StructRNA *srna;
  PropertyRNA *prop;
 
  srna = RNA_def_struct(brna, "Key", "ID");
  RNA_def_struct_ui_text(
      srna, "Key", "Shape keys data-block containing different shapes of geometric data-blocks");
  RNA_def_struct_ui_icon(srna, ICON_SHAPEKEY_DATA);
 
  prop = RNA_def_property(srna, "reference_key", PROP_POINTER, PROP_NONE);
  RNA_def_property_flag(prop, PROP_NEVER_NULL);
  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
  RNA_def_property_pointer_sdna(prop, NULL, "refkey");
  RNA_def_property_ui_text(prop, "Reference Key", "");
 
  prop = RNA_def_property(srna, "key_blocks", PROP_COLLECTION, PROP_NONE);
  RNA_def_property_collection_sdna(prop, NULL, "block", NULL);
  RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
  RNA_def_property_struct_type(prop, "ShapeKey");
  RNA_def_property_ui_text(prop, "Key Blocks", "Shape keys");
 
  rna_def_animdata_common(srna);
 
  prop = RNA_def_property(srna, "user", PROP_POINTER, PROP_NONE);
  RNA_def_property_flag(prop, PROP_NEVER_NULL);
  RNA_def_property_override_flag(prop, PROPOVERRIDE_NO_COMPARISON);
  RNA_def_property_pointer_sdna(prop, NULL, "from");
  RNA_def_property_ui_text(prop, "User", "Data-block using these shape keys");
 
  prop = RNA_def_property(srna, "use_relative", PROP_BOOLEAN, PROP_NONE);
  RNA_def_property_boolean_sdna(prop, NULL, "type", KEY_RELATIVE);
  RNA_def_property_ui_text(
      prop,
      "Relative",
      "Make shape keys relative, "
      "otherwise play through shapes as a sequence using the evaluation time");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
 
  prop = RNA_def_property(srna, "eval_time", PROP_FLOAT, PROP_NONE);
  RNA_def_property_float_sdna(prop, NULL, "ctime");
  RNA_def_property_range(prop, MINFRAME, MAXFRAME);
  RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
  RNA_def_property_ui_text(prop, "Evaluation Time", "Evaluation time for absolute shape keys");
  RNA_def_property_update(prop, 0, "rna_Key_update_data");
}
 
void RNA_def_key(BlenderRNA *brna)
{
  rna_def_key(brna);
  rna_def_keyblock(brna);
  rna_def_keydata(brna);
}
 
#endif