Semi-transparent Selection with Halo

Starting from Eyeshot 2022.2 it is possible to draw dynamically selected entities with a halo effect.

Starting from Eyeshot 2023 it is possible to draw both static and dynamic selection entities with a halo effect.

All the relevant settings are grouped under the property Workspace.Selection. The new SelectionSettings class contains all the properties related to the appearance of selected entities.

To enable the halo effect:

• For dynamic selection, set Workspace.Selection.ColorDynamic to a transparent color (ColorDynamic.A < 255).
• For static selection, set Workspace.Selection.Color to a transparent color.

Halo Color

Selected entities are drawn with a halo surrounding them. This halo could be single-colored or multi-colored.

The following parameters determine the color of the halo effect:

• Workspace.Selection.HaloInnerColor  / HaloInnerColorDynamic
• Workspace.Selection.HaloOuterColor / HaloOuterColorDynamic

Halo Width

The width of the halo effect is determined by the following properties:

• Workspace.Selection.HaloWidthPolygons 
• Workspace.Selection.HaloWidthWires.

The first determines the halo width for polygonal entities while the second is the values used for wireframe entities and Brep.Edges.

It is also possible for derived classes that inherit from Entity to override the property Entity.HaloMode to specify the halo thickness for the custom entity if the default implementation is not suitable. 

Examples

The following examples show the results you can achieve with the halo effect feature.

Smooth 

design1.Selection.ColorDynamic = Color.FromArgb(80, Color.OrangeRed);
design1.Selection.HaloInnerColor = Color.FromArgb(255, Color.OrangeRed);
design1.Selection.HaloOuterColor = Color.FromArgb(64, Color.OrangeRed);
design1.Selection.HaloWidthPolygons = 4;
design1.Selection.HaloWidthWires = 2;

 

Multicolor

design1.Selection.ColorDynamic = Color.FromArgb(80, Color.DodgerBlue);
design1.Selection.HaloInnerColor = Color.FromArgb(200, Color.Cyan);
design1.Selection.HaloOuterColor = Color.FromArgb(60, Color.DodgerBlue);
design1.Selection.HaloWidthPolygons = 4;
design1.Selection.HaloWidthWires = 2;

 

Multicolor No Fill

design1.Selection.ColorDynamic = Color.Empty;
design1.Selection.HaloInnerColor = Color.FromArgb(255, Color.White);
design1.Selection.HaloOuterColor = Color.FromArgb(64, Color.Gold);
design1.Selection.HaloWidthPolygons = 4;
design1.Selection.HaloWidthWires = 2;