Sculpt: Line Project Gesture tool

This tool projects all vertices to the right of the plane defined by the
line gesture towards the plane. By doing this, this tool can create cuts
and plane surfaces in the mesh without modifying the geometry or using
boolean operations, so it is much faster than bisecting the mesh for
cases where the geometry was going to be remeshed afterwards.

Added as experimental as it does not have icon.

Reviewed By: sergey, Severin

Differential Revision: https://developer.blender.org/D9021

release/scripts/presets/keyconfig/keymap_data/blender_default.py

@@ -6400,6 +6400,16 @@ def km_3d_view_tool_sculpt_line_mask(params):
         ]},
     )
 
+def km_3d_view_tool_sculpt_line_project(params):
+    return (
+        "3D View Tool: Sculpt, Line Project",
+        {"space_type": 'VIEW_3D', "region_type": 'WINDOW'},
+        {"items": [
+            ("sculpt.project_line_gesture", {"type": params.tool_tweak, "value": 'ANY'},
+             None),
+        ]},
+    )
+
 def km_3d_view_tool_sculpt_mesh_filter(params):
     return (
         "3D View Tool: Sculpt, Mesh Filter",
@@ -7005,6 +7015,7 @@ def generate_keymaps(params=None):
         km_3d_view_tool_sculpt_box_trim(params),
         km_3d_view_tool_sculpt_lasso_trim(params),
         km_3d_view_tool_sculpt_line_mask(params),
+        km_3d_view_tool_sculpt_line_project(params),
         km_3d_view_tool_sculpt_mesh_filter(params),
         km_3d_view_tool_sculpt_cloth_filter(params),
         km_3d_view_tool_sculpt_color_filter(params),