Carver: Modal

Since carver tools are using modal operators, a lot of things can be controlled during the modal (between initiating the operator and confirming it), some of which are not available otherwise.

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Snapping

Carver tools support (so far only) snapping to a 3D viewport grid. Snapping can be used to create perfectly symmetrical shapes and support either of the three tools.

• Just like Blender's built-in tools, if the snapping is enabled in the scene Carver tools will start with snapping enabled, and holding down Ctrl will disable it, or vice versa if snapping is disabled.
• Snapping is happening on an invisible 2D grid which is aligned to the view. That means in perspective mode snapping is not happening on a visible grid but in an orthographic view (which is where snapping is most useful) cursor snaps to the actual, visible viewport grid. In orthographic view white snapping gizmo also appears.
• If user starts drawing with Ctrl held down first point of the shape will also snap to the nearest grid.
• When snapping is enabled all points of the shape are snapped to the grid, not just the cursor, or the last point in the case of Polyline tool.
• When snapping is enabled scroll wheel of the mouse can increase or decrease the grid subdivision level (which is represented by gizmo in orthographic view) to easily snap to larger or smaller points of the grid.

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Polyline

Since the Polyline tool is quite different from the other two it has unique behavior during modal. Instead of being initiated by drag and confirmed on release, each LMB click adds a new vertice of the shape, and to confirm the final shape Enter key has to be pressed (Enter also works on other tools).

• Last drawn point of the shape can be removed with Backspace key.
• When moving cursor near the first point a romb shape appears, clicking inside which will also confirm the shape.
• If shape is finalized by clicking inside the romb last vert will be perfectly connected to the first one.
• What is considered as a last point depends on "Closed Polygon" property in "Shape" dropdown menu.

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Modifier Keys

• Just like Blender's built-in gesture tools, Carver tools support moving the already drawn shape by holding the Spacebar key.
• Holding down R will start rotating the shape (more about the rotation here).
• Shift modifier key will invert the aspect, Alt will invert the origin point.
• → and ↑ keys will add one more row of column in in array, ← and ↓ will subtract.
• If array is initiated, holding down A will allow changing the gap between rows and columns by moving mouse on X and Y axes.
• For Box Carve tool, pressing B will add Bevel. Holding it down and moving cursor will change radius, scroll wheel will change segments.