knife projection feature,

apart of 3d printing tools - use to cookie-cut text into a mesh.

1 files changed, 163 insertions, 0 deletions

diff --git a/source/blender/editors/mesh/editmesh_knife_project.c b/source/blender/editors/mesh/editmesh_knife_project.c
new file mode 100644
index 00000000000..7bb7e362c98
--- /dev/null
+++ b/source/blender/editors/mesh/editmesh_knife_project.c
@@ -0,0 +1,163 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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) 2007 Blender Foundation.
+ * All rights reserved.
+ *
+ *
+ * Contributor(s): Campbell Barton
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/editors/mesh/editmesh_knife_project.c
+ *  \ingroup edmesh
+ */
+
+#include "DNA_curve_types.h"
+#include "DNA_scene_types.h"
+#include "DNA_object_types.h"
+#include "DNA_screen_types.h"
+#include "DNA_windowmanager_types.h"
+
+#include "BLI_utildefines.h"
+#include "BLI_math.h"
+#include "BLI_linklist.h"
+#include "BLI_listbase.h"
+
+#include "BKE_library.h"
+#include "BKE_mesh.h"
+#include "BKE_context.h"
+#include "BKE_curve.h"
+#include "BKE_cdderivedmesh.h"
+#include "BKE_tessmesh.h"
+#include "BKE_report.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "WM_types.h"
+
+#include "ED_screen.h"
+#include "ED_view3d.h"
+
+#include "mesh_intern.h"
+
+
+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 (ELEM3(ob->type, OB_FONT, OB_CURVE, OB_SURF)) {
+		dm = CDDM_from_curve(ob);
+		dm_needsFree = true;
+	}
+
+	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_v3_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;
+}
+
+static int knifeproject_exec(bContext *C, wmOperator *op)
+{
+	ARegion *ar = CTX_wm_region(C);
+	Scene *scene = CTX_data_scene(C);
+	Object *obedit = CTX_data_edit_object(C);
+	BMEditMesh *em = BMEdit_FromObject(obedit);
+
+	LinkNode *polys = NULL;
+
+	CTX_DATA_BEGIN (C, Object *, ob, selected_objects)
+	{
+		if (ob != obedit) {
+			polys = knifeproject_poly_from_object(ar, scene, ob, polys);
+		}
+	}
+	CTX_DATA_END;
+
+	if (polys) {
+		EDBM_mesh_knife(C, polys, true);
+
+		/* select only tagged faces */
+		BM_mesh_elem_hflag_disable_all(em->bm, BM_VERT | BM_EDGE | BM_FACE, BM_ELEM_TAG, false);
+		BM_mesh_elem_hflag_enable_test(em->bm, BM_FACE, BM_ELEM_SELECT, true, BM_ELEM_TAG);
+
+		BLI_linklist_freeN(polys);
+
+		return OPERATOR_FINISHED;
+	}
+	else {
+		BKE_report(op->reports, RPT_ERROR, "No other selected objects found to use for projection");
+		return OPERATOR_CANCELLED;
+	}
+}
+
+void MESH_OT_knife_project(wmOperatorType *ot)
+{
+	/* description */
+	ot->name = "Knife Project";
+	ot->idname = "MESH_OT_knife_project";
+	ot->description = "Use other objects outlines & boundaries to project knife cuts";
+
+	/* callbacks */
+	ot->exec = knifeproject_exec;
+	ot->poll = ED_operator_editmesh_view3d;
+
+	/* flags */
+	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO | OPTYPE_BLOCKING;
+}
+