void BKE_mesh_to_curve(Main *bmain, Depsgraph *depsgraph, Scene *UNUSED(scene), Object *ob)
{
/* make new mesh data from the original copy */
Scene *scene_eval = DEG_get_evaluated_scene(depsgraph);
Object *ob_eval = DEG_get_evaluated_object(depsgraph, ob);
Mesh *me_eval = mesh_get_eval_final(depsgraph, scene_eval, ob_eval, &CD_MASK_MESH);
ListBase nurblist = {NULL, NULL};
BKE_mesh_to_curve_nurblist(me_eval, &nurblist, 0);
BKE_mesh_to_curve_nurblist(me_eval, &nurblist, 1);
if (nurblist.first) {
Curve *cu = BKE_curve_add(bmain, ob->id.name + 2, OB_CURVE);
cu->flag |= CU_3D;
cu->nurb = nurblist;
id_us_min(&((Mesh *)ob->data)->id);
ob->data = cu;
ob->type = OB_CURVE;
BKE_object_free_derived_caches(ob);
}
}
/* convert a given grease-pencil layer to a 3d-curve representation (using current view if appropriate) */
static void gp_layer_to_curve(bContext *C, ReportList *reports, bGPdata *gpd, bGPDlayer *gpl, const int mode,
const bool norm_weights, const float rad_fac, const bool link_strokes, tGpTimingData *gtd)
{
struct Main *bmain = CTX_data_main(C);
View3D *v3d = CTX_wm_view3d(C); /* may be NULL */
Scene *scene = CTX_data_scene(C);
bGPDframe *gpf = gpencil_layer_getframe(gpl, CFRA, 0);
bGPDstroke *gps, *prev_gps = NULL;
Object *ob;
Curve *cu;
Nurb *nu = NULL;
Base *base_orig = BASACT, *base_new = NULL;
float minmax_weights[2] = {1.0f, 0.0f};
/* camera framing */
rctf subrect, *subrect_ptr = NULL;
/* error checking */
if (ELEM(NULL, gpd, gpl, gpf))
return;
/* only convert if there are any strokes on this layer's frame to convert */
if (BLI_listbase_is_empty(&gpf->strokes))
return;
/* initialize camera framing */
if (gp_camera_view_subrect(C, &subrect)) {
subrect_ptr = &subrect;
}
/* init the curve object (remove rotation and get curve data from it)
* - must clear transforms set on object, as those skew our results
*/
ob = BKE_object_add_only_object(bmain, OB_CURVE, gpl->info);
cu = ob->data = BKE_curve_add(bmain, gpl->info, OB_CURVE);
base_new = BKE_scene_base_add(scene, ob);
cu->flag |= CU_3D;
gtd->inittime = ((bGPDstroke *)gpf->strokes.first)->inittime;
/* add points to curve */
for (gps = gpf->strokes.first; gps; gps = gps->next) {
const bool add_start_point = (link_strokes && !(prev_gps));
const bool add_end_point = (link_strokes && !(gps->next));
/* Detect new strokes created because of GP_STROKE_BUFFER_MAX reached, and stitch them to previous one. */
bool stitch = false;
if (prev_gps) {
bGPDspoint *pt1 = &prev_gps->points[prev_gps->totpoints - 1];
bGPDspoint *pt2 = &gps->points[0];
if ((pt1->x == pt2->x) && (pt1->y == pt2->y)) {
stitch = true;
}
}
/* Decide whether we connect this stroke to previous one */
if (!(stitch || link_strokes)) {
nu = NULL;
}
switch (mode) {
case GP_STROKECONVERT_PATH:
gp_stroke_to_path(C, gpl, gps, cu, subrect_ptr, &nu, minmax_weights, rad_fac, stitch,
add_start_point, add_end_point, gtd);
break;
case GP_STROKECONVERT_CURVE:
case GP_STROKECONVERT_POLY: /* convert after */
gp_stroke_to_bezier(C, gpl, gps, cu, subrect_ptr, &nu, minmax_weights, rad_fac, stitch,
add_start_point, add_end_point, gtd);
break;
default:
BLI_assert(!"invalid mode");
break;
}
prev_gps = gps;
}
/* If link_strokes, be sure first and last points have a zero weight/size! */
if (link_strokes) {
gp_stroke_finalize_curve_endpoints(cu);
}
/* Update curve's weights, if needed */
if (norm_weights && ((minmax_weights[0] > 0.0f) || (minmax_weights[1] < 1.0f))) {
gp_stroke_norm_curve_weights(cu, minmax_weights);
}
/* Create the path animation, if needed */
gp_stroke_path_animation(C, reports, cu, gtd);
if (mode == GP_STROKECONVERT_POLY) {
for (nu = cu->nurb.first; nu; nu = nu->next) {
BKE_nurb_type_convert(nu, CU_POLY, false);
}
}
/* set the layer and select */
base_new->lay = ob->lay = base_orig ? base_orig->lay : BKE_screen_view3d_layer_active(v3d, scene);
base_new->flag = ob->flag = base_new->flag | SELECT;
}
