MOD_gpencilarmature.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) 2018, Blender Foundation
 * This is a new part of Blender
 */
 
#include <stdio.h>
 
#include "BLI_listbase.h"
#include "BLI_utildefines.h"
 
#include "BLI_math.h"
 
#include "BLT_translation.h"
 
#include "DNA_defaults.h"
#include "DNA_gpencil_modifier_types.h"
#include "DNA_gpencil_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
 
#include "BKE_armature.h"
#include "BKE_context.h"
#include "BKE_gpencil.h"
#include "BKE_gpencil_geom.h"
#include "BKE_gpencil_modifier.h"
#include "BKE_lib_query.h"
#include "BKE_main.h"
#include "BKE_modifier.h"
#include "BKE_scene.h"
#include "BKE_screen.h"
 
#include "MEM_guardedalloc.h"
 
#include "UI_interface.h"
#include "UI_resources.h"
 
#include "RNA_access.h"
 
#include "MOD_gpencil_modifiertypes.h"
#include "MOD_gpencil_ui_common.h"
 
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_build.h"
#include "DEG_depsgraph_query.h"
 
static void initData(GpencilModifierData *md)
{
  ArmatureGpencilModifierData *gpmd = (ArmatureGpencilModifierData *)md;
 
  BLI_assert(MEMCMP_STRUCT_AFTER_IS_ZERO(gpmd, modifier));
 
  MEMCPY_STRUCT_AFTER(gpmd, DNA_struct_default_get(ArmatureGpencilModifierData), modifier);
}
 
static void copyData(const GpencilModifierData *md, GpencilModifierData *target)
{
  BKE_gpencil_modifier_copydata_generic(md, target);
}
 
static void gpencil_deform_verts(ArmatureGpencilModifierData *mmd, Object *target, bGPDstroke *gps)
{
  bGPDspoint *pt = gps->points;
  float(*vert_coords)[3] = MEM_mallocN(sizeof(float[3]) * gps->totpoints, __func__);
  int i;
 
  BKE_gpencil_dvert_ensure(gps);
 
  /* prepare array of points */
  for (i = 0; i < gps->totpoints; i++, pt++) {
    copy_v3_v3(vert_coords[i], &pt->x);
  }
 
  /* deform verts */
  BKE_armature_deform_coords_with_gpencil_stroke(mmd->object,
                                                 target,
                                                 vert_coords,
                                                 NULL,
                                                 gps->totpoints,
                                                 mmd->deformflag,
                                                 mmd->vert_coords_prev,
                                                 mmd->vgname,
                                                 gps);
 
  /* Apply deformed coordinates */
  pt = gps->points;
  for (i = 0; i < gps->totpoints; i++, pt++) {
    copy_v3_v3(&pt->x, vert_coords[i]);
  }
 
  MEM_freeN(vert_coords);
}
 
/* deform stroke */
static void deformStroke(GpencilModifierData *md,
                         Depsgraph *UNUSED(depsgraph),
                         Object *ob,
                         bGPDlayer *UNUSED(gpl),
                         bGPDframe *UNUSED(gpf),
                         bGPDstroke *gps)
{
  ArmatureGpencilModifierData *mmd = (ArmatureGpencilModifierData *)md;
  if (!mmd->object) {
    return;
  }
  bGPdata *gpd = ob->data;
 
  gpencil_deform_verts(mmd, ob, gps);
  /* Calc geometry data. */
  BKE_gpencil_stroke_geometry_update(gpd, gps);
}
 
static void bakeModifier(Main *UNUSED(bmain),
                         Depsgraph *depsgraph,
                         GpencilModifierData *md,
                         Object *ob)
{
  Scene *scene = DEG_get_evaluated_scene(depsgraph);
  Object *object_eval = DEG_get_evaluated_object(depsgraph, ob);
  ArmatureGpencilModifierData *mmd = (ArmatureGpencilModifierData *)md;
  GpencilModifierData *md_eval = BKE_gpencil_modifiers_findby_name(object_eval, md->name);
  bGPdata *gpd = (bGPdata *)ob->data;
  int oldframe = (int)DEG_get_ctime(depsgraph);
 
  if (mmd->object == NULL) {
    return;
  }
 
  LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
    LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
      /* apply armature effects on this frame
       * NOTE: this assumes that we don't want armature animation on non-keyframed frames
       */
      CFRA = gpf->framenum;
      BKE_scene_graph_update_for_newframe(depsgraph);
 
      /* compute armature effects on this frame */
      LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
        deformStroke(md_eval, depsgraph, object_eval, gpl, gpf, gps);
      }
    }
  }
 
  /* return frame state and DB to original state */
  CFRA = oldframe;
  BKE_scene_graph_update_for_newframe(depsgraph);
}
 
static bool isDisabled(GpencilModifierData *md, int UNUSED(userRenderParams))
{
  ArmatureGpencilModifierData *mmd = (ArmatureGpencilModifierData *)md;
 
  /* The object type check is only needed here in case we have a placeholder
   * object assigned (because the library containing the armature is missing).
   *
   * In other cases it should be impossible to have a type mismatch. */
  return !mmd->object || mmd->object->type != OB_ARMATURE;
}
 
static void updateDepsgraph(GpencilModifierData *md,
                            const ModifierUpdateDepsgraphContext *ctx,
                            const int UNUSED(mode))
{
  ArmatureGpencilModifierData *lmd = (ArmatureGpencilModifierData *)md;
  if (lmd->object != NULL) {
    DEG_add_object_relation(ctx->node, lmd->object, DEG_OB_COMP_EVAL_POSE, "Armature Modifier");
    DEG_add_object_relation(ctx->node, lmd->object, DEG_OB_COMP_TRANSFORM, "Armature Modifier");
  }
  DEG_add_object_relation(ctx->node, ctx->object, DEG_OB_COMP_TRANSFORM, "Armature Modifier");
}
 
static void foreachIDLink(GpencilModifierData *md, Object *ob, IDWalkFunc walk, void *userData)
{
  ArmatureGpencilModifierData *mmd = (ArmatureGpencilModifierData *)md;
 
  walk(userData, ob, (ID **)&mmd->object, IDWALK_CB_NOP);
}
 
static void panel_draw(const bContext *UNUSED(C), Panel *panel)
{
  uiLayout *sub, *row, *col;
  uiLayout *layout = panel->layout;
 
  PointerRNA ob_ptr;
  PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, &ob_ptr);
 
  bool has_vertex_group = RNA_string_length(ptr, "vertex_group") != 0;
 
  uiLayoutSetPropSep(layout, true);
 
  uiItemR(layout, ptr, "object", 0, NULL, ICON_NONE);
  row = uiLayoutRow(layout, true);
  uiItemPointerR(row, ptr, "vertex_group", &ob_ptr, "vertex_groups", NULL, ICON_NONE);
  sub = uiLayoutRow(row, true);
  uiLayoutSetActive(sub, has_vertex_group);
  uiLayoutSetPropDecorate(sub, false);
  uiItemR(sub, ptr, "invert_vertex_group", 0, "", ICON_ARROW_LEFTRIGHT);
 
  col = uiLayoutColumnWithHeading(layout, true, IFACE_("Bind To"));
  uiItemR(col, ptr, "use_vertex_groups", 0, IFACE_("Vertex Groups"), ICON_NONE);
  uiItemR(col, ptr, "use_bone_envelopes", 0, IFACE_("Bone Envelopes"), ICON_NONE);
 
  gpencil_modifier_panel_end(layout, ptr);
}
 
static void panelRegister(ARegionType *region_type)
{
  gpencil_modifier_panel_register(region_type, eGpencilModifierType_Armature, panel_draw);
}
 
GpencilModifierTypeInfo modifierType_Gpencil_Armature = {
    /* name */ "Armature",
    /* structName */ "ArmatureGpencilModifierData",
    /* structSize */ sizeof(ArmatureGpencilModifierData),
    /* type */ eGpencilModifierTypeType_Gpencil,
    /* flags */ eGpencilModifierTypeFlag_SupportsEditmode,
 
    /* copyData */ copyData,
 
    /* deformStroke */ deformStroke,
    /* generateStrokes */ NULL,
    /* bakeModifier */ bakeModifier,
    /* remapTime */ NULL,
    /* initData */ initData,
    /* freeData */ NULL,
    /* isDisabled */ isDisabled,
    /* updateDepsgraph */ updateDepsgraph,
    /* dependsOnTime */ NULL,
    /* foreachIDLink */ foreachIDLink,
    /* foreachTexLink */ NULL,
    /* panelRegister */ panelRegister,
};