Positioning

`viren2d.Anchor`	Placement options with respect to a reference point.
`viren2d.HorizontalAlignment`	Enumeration for horizontal alignment.
`viren2d.VerticalAlignment`	Options for vertical alignment.
`viren2d.LabelPosition`	Placement options for labels.

Anchor

class viren2d.Anchor

Placement options with respect to a reference point.
Explicit instantiation:
>>> anchor = viren2d.Anchor.TopLeft
Implicit conversion:
>>> painter.draw_text(..., anchor='center')
All supported anchors are shown below and can also be listed via list_all().

Corresponding C++ API: viren2d::Anchor.

Members:

Center :
Horizontally & vertically centered. Alias string representation: 'middle'.

Left :
Horizontally left-aligned & vertically centered. Alias string representation: west.

Right :
Horizontally right-aligned & vertically centered. Alias string representation: east.

Top :
Horizontally centered & vertically top-aligned. Alias string representation: north.

Bottom :
Horizontally centered & vertically bottom-aligned. Alias string representation: south.

TopLeft :
Horizontally left- & vertically top-aligned. Alias string representation: north-west.

TopRight :
Horizontally right- & vertically top-aligned. Alias string representation: north-east.

BottomLeft :
Horizontally left- & vertically bottom-aligned. Alias string representation: south-west.

BottomRight :
Horizontally right- & vertically bottom-aligned. Alias string representation: south-east.

static list_all() → List[viren2d.Anchor]

Returns all Anchor values.

Convenience utility to easily iterate all enumeration values.

Corresponding C++ API: viren2d::ListAnchors.

Horizontal Alignment

class viren2d.HorizontalAlignment

Enumeration for horizontal alignment.

Corresponding C++ API: viren2d::HorizontalAlignment.

Members:

Left :
Horizontally left-aligned.

String representation 'left' or 'west'.

Center :
Horizontally centered.

String representation 'center' or 'middle'.

Right :
Horizontally right-aligned.

String representation 'right' or 'east'.

Exemplary alignment of mulit-line text:

The code listing to create this visualization is shown in the tutorial section on multi-line text.

Vertical Alignment

class viren2d.VerticalAlignment

Options for vertical alignment.

Corresponding C++ API: viren2d::VerticalAlignment.

Members:

Top :
Vertically top-aligned.

String representation 'top' or 'north'.

Center :
Vertically centered.

String representation 'center' or 'middle'.

Bottom :
Vertically bottom-aligned.

String representation 'bottom' or 'south'.

Label Position

class viren2d.LabelPosition

Placement options for labels.

Corresponding C++ API: viren2d::LabelPosition.

Members:

Top :
At the top of the bounding box.

Bottom :
At the bottom of the bounding box.

Left :
Along the left edge of the bounding box, from bottom to top. Alias string representation: left-b2t.

LeftT2B :
Along the left edge of the bounding box, from top to bottom.

Right :
Along the right edge of the bounding box, from top to bottom. Alias string representation: right-t2b.

RightB2T :
Along the right edge of the bounding box, from bottom to top.

Example:

TODO add example bbox image and refer to tutorial section on tracking-by-detection

Corresponding Python Code:

TODO implement in examples/rtd/positioning