Adding a Arc node
This node generates a mask in the shape of the arc of a circle.
The arc of a circle is defined by 3 points: point 1 and point 3
form the 2 extremities of the arc of a circle, and point 2 adjusts
the radius of curvature between the two end points.
Points 1, 2 and 3 can be moved using the manipulators or their X
and Y coordinates can be entered manually in the node
properties.
The points cannot overlap, i.e. it is impossible to create a closed
circle.
If the coordinate values of a point are constrained
by a value from an optional input connector, the manipulator
associated with these coordinates is not displayed. In the example
below, the coordinate values of point 1 come from another node: the
manipulator of point 1 no longer appears.
To add an Arc node, right-click in the Graph Editor and select Create Node > Mask Generation > Arc or press the keyboard shortcut N-A-R (Node Arc).
Double click on the node to open its parameters:
Editing an Arc node
To edit the Arc node:
- Preset: List of existing size presets. Select one from the list to apply the size preset.
- Width: Width of the mask to generate in number of vertices.
- Height: Height of the mask to generate in number of vertices.
- Quad size: Size of the quads of the mask in meters.
- Points 1 and 2: These points define the ends
of the line. Use the sliders to adjust the point's X and Y
coordinates.
The X and Y coordinates of each of the two points are relative to the center of the mask with a value between -1 and +1:- 0 corresponds to the middle in width (X), in height (Y); (0,0) positions the point in the center of the mask.
- -1 and 1 correspond to the minimum and maximum values of the coordinates (limit of the mask); (1,1), (-1,1), (1,-1), and (1,1) position the point in one of the four corners of the mask.
- Line – Width: Adjusts the thickness of the
line from 1 to 20.
Components
The Line and Arc nodes can be used in components to propagate the coordinates of their respective points, allowing the formation of a circuit. An end point of an Arc can be linked to an end point of Line to guarantee a permanently valid link between the different masks. This is used in the This is used in the Road sample, available in the Help > Samples menu.
Components can be retrieved from this sample project in the Models window > Mask generation > Circuit - Arc or Circuit - Line, and then right-click and select Export component.
Components can also be retrieved from our site at https://www.wysilab.com/Library/#/.
Parameters
| Parameter | Use |
|---|---|
| Preset | List of existing size presets. |
| Width | Width of the mask to generate in number of vertices. |
| Height | Height of the mask to generate in number of vertices. |
| Quad size | Size of the quads of the mask in meters. |
| Points 1 and 2 | Defines the extremities of the circular arc. |
| Point 3 | Adjusts the radius of curvature of the arc of a circle. |
| Line - Width | Adjusts the thickness of the line from 1 to 20. |