Curves: initial brush system integration for curves sculpt mode

This adds the boilerplate code that is necessary to use the tool/brush/paint
systems in the new sculpt curves mode.

Two temporary dummy tools are part of this patch. They do nothing and
only serve to test the boilerplate. When the first actual tool is added,
those dummy tools will be removed.

Differential Revision: https://developer.blender.org/D14117

1 files changed, 85 insertions, 0 deletions

diff --git a/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc b/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc
new file mode 100644
index 00000000000..ead016174c9
--- /dev/null
+++ b/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "BLI_utildefines.h"
+
+#include "BKE_context.h"
+#include "BKE_paint.h"
+
+#include "WM_api.h"
+
+#include "ED_curves_sculpt.h"
+
+#include "curves_sculpt_intern.h"
+#include "paint_intern.h"
+
+bool CURVES_SCULPT_mode_poll(struct bContext *C)
+{
+  Object *ob = CTX_data_active_object(C);
+  return ob && ob->mode & OB_MODE_SCULPT_CURVES;
+}
+
+static bool stroke_get_location(bContext *C, float out[3], const float mouse[2])
+{
+  out[0] = mouse[0];
+  out[1] = mouse[1];
+  out[2] = 0;
+  UNUSED_VARS(C);
+  return true;
+}
+
+static bool stroke_test_start(bContext *C, struct wmOperator *op, const float mouse[2])
+{
+  UNUSED_VARS(C, op, mouse);
+  return true;
+}
+
+static void stroke_update_step(bContext *C, PaintStroke *stroke, PointerRNA *itemptr)
+{
+  UNUSED_VARS(C, stroke, itemptr);
+}
+
+static void stroke_done(const bContext *C, PaintStroke *stroke)
+{
+  UNUSED_VARS(C, stroke);
+}
+
+static int sculpt_curves_stroke_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+  PaintStroke *stroke = paint_stroke_new(C,
+                                         op,
+                                         stroke_get_location,
+                                         stroke_test_start,
+                                         stroke_update_step,
+                                         nullptr,
+                                         stroke_done,
+                                         event->type);
+  op->customdata = stroke;
+
+  WM_event_add_modal_handler(C, op);
+  return OPERATOR_RUNNING_MODAL;
+}
+
+static void sculpt_curves_stroke_cancel(bContext *C, wmOperator *op)
+{
+  paint_stroke_cancel(C, op);
+}
+
+static void SCULPT_CURVES_OT_brush_stroke(struct wmOperatorType *ot)
+{
+  ot->name = "Stroke Curves Sculpt";
+  ot->idname = "SCULPT_CURVES_OT_brush_stroke";
+  ot->description = "Sculpt curves using a brush";
+
+  ot->invoke = sculpt_curves_stroke_invoke;
+  ot->modal = paint_stroke_modal;
+  ot->cancel = sculpt_curves_stroke_cancel;
+
+  ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+
+  paint_stroke_operator_properties(ot);
+}
+
+void ED_operatortypes_sculpt_curves()
+{
+  WM_operatortype_append(SCULPT_CURVES_OT_brush_stroke);
+}