64 lines
2.9 KiB
ReStructuredText
64 lines
2.9 KiB
ReStructuredText
.. _tool-mesh-extrude_cursor:
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*****************
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Extrude to Cursor
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*****************
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.. reference::
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:Mode: Edit Mode
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:Shortcut: :kbd:`Ctrl-RMB`
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Interactively places new vertices with :kbd:`Ctrl-RMB` at the mouse cursor position.
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The most basic element, a vertex, can be added with a :kbd:`Ctrl-RMB` click
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when no other vertices are selected.
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Because the camera space (computer screen) is two-dimensional,
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Blender cannot determine all three vertex coordinates from a single mouse click,
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so the new vertex is placed at the depth of the 3D cursor.
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To create interconnected vertices, you can add a vertex and continuously make subsequent :kbd:`Ctrl-RMB`
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operations with the last vertex selected.
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This will link the last selected vertex with the vertex created at the mouse position with an edge
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(see Fig. :ref:`fig-mesh-basics-add-one-tool`),
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and will continuously create and connect new vertices if you continue repeating this operation.
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.. _fig-mesh-basics-add-one-tool:
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.. figure:: /images/modeling_meshes_tools_extrude-cursor_vertex.png
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Adding vertices one by one.
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Creating Faces
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==============
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.. figure:: /images/modeling_meshes_tools_extrude-cursor_quad.png
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Quad from an Edge with source automatically rotated.
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If you have two vertices selected and already connected with an edge, :kbd:`Ctrl-RMB` click
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will create a planar face, also known as a quad. Blender will follow your mouse cursor
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and will use the planar view from your viewport to create those quads.
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For :kbd:`Ctrl-RMB`, Blender will automatically rotate the last selected Edge (the source)
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for the subsequent operations if you have at least one face created, dividing the angles created between
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the newly created edge and the last two edges, creating a smooth angle between them. Blender will calculate
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this angle using the last positive and negative position of the last X and Y coordinates
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and the last connected unselected edge. If this angle exceeds a negative limit (following a quadrant rule)
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between the recently created edge and the last two, Blender will wrap the faces.
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But if you do not want Blender to rotate and smooth edges automatically when extruding from :kbd:`Ctrl-RMB`,
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you can also inhibit Blender from rotating sources using the shortcut :kbd:`Shift-Ctrl-RMB`.
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In this case, Blender will not rotate the source dividing the angle between those edges when creating a face.
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If you have three or more vertices selected, and :kbd:`Ctrl-RMB` click,
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you will also create planar faces, but along the vertices selected, following the direction of the cursor.
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This operation is similar to an extrude operation.
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.. tip::
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When adding objects with :kbd:`Ctrl-RMB`, the extrusions of the selected elements,
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being vertices, edges and faces with the :kbd:`Ctrl-RMB`, are viewport dependent.
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This means, once you change your viewport, for example, from top to left, bottom or right,
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the extrusion direction will also follow your viewport and align the extrusions with your planar view.
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