C++ (Cpp) BKE_mesh_to_curve_nurblist Examples

Example #1

File: editmesh_knife_project.c Project: SuriyaaKudoIsc/blender-git

static LinkNode *knifeproject_poly_from_object(ARegion *ar, Scene *scene, Object *ob, LinkNode *polys)
{
	DerivedMesh *dm;
	bool dm_needsFree;

	if (ob->type == OB_MESH || ob->derivedFinal) {
		dm = ob->derivedFinal ? ob->derivedFinal : mesh_get_derived_final(scene, ob, CD_MASK_BAREMESH);
		dm_needsFree = false;
	}
	else if (ELEM(ob->type, OB_FONT, OB_CURVE, OB_SURF)) {
		dm = CDDM_from_curve(ob);
		dm_needsFree = true;
	}
	else {
		dm = NULL;
	}

	if (dm) {
		ListBase nurbslist = {NULL, NULL};
		float projmat[4][4];

		BKE_mesh_to_curve_nurblist(dm, &nurbslist, 0);  /* wire */
		BKE_mesh_to_curve_nurblist(dm, &nurbslist, 1);  /* boundary */

		ED_view3d_ob_project_mat_get(ar->regiondata, ob, projmat);

		if (nurbslist.first) {
			Nurb *nu;
			for (nu = nurbslist.first; nu; nu = nu->next) {
				if (nu->bp) {
					int a;
					BPoint *bp;
					bool is_cyclic = (nu->flagu & CU_NURB_CYCLIC) != 0;
					float (*mval)[2] = MEM_mallocN(sizeof(*mval) * (nu->pntsu + is_cyclic), __func__);

					for (bp = nu->bp, a = 0; a < nu->pntsu; a++, bp++) {
						ED_view3d_project_float_v2_m4(ar, bp->vec, mval[a], projmat);
					}
					if (is_cyclic) {
						copy_v2_v2(mval[a], mval[0]);
					}

					BLI_linklist_prepend(&polys, mval);
				}
			}
		}

		BKE_nurbList_free(&nurbslist);

		if (dm_needsFree) {
			dm->release(dm);
		}
	}


	return polys;
}

Example #2

File: mesh_convert.c Project: wangyxuan/blender

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);
  }
}