User:Ali Haydar/GSOC19/project

Annotations: Implement support for 2D annotations, labels that can be added to geometry

The project is divided into two parts:

• Creating a new primitive for annotations
• Rendering the primitives to the wireframe view

Creating a new primitive for annotations

• Annotations comprise of:
  • Notes and Labels : Single line or Multiline text
  • Leader Lines (includes GD&T)

• The primary goal is to implement simple leader lines, so that we have a basic frame for further amendments.
• Support for view Independent annotations: This is resolved by using a separate coordinate system in two dimensions for the labels. This coordinate system has a direct mapping with the original 3D coordinate system that comprises of the wireframes.
• Coordinate system is nothing but a transformation matrix. This matrix projects all the points in the 3D coordinate system to the 2D coordinate system that will contain the annotations.
• The plan of action comprises of the creation of a new primitive “annotation”. The basic workflow can be related to that of the sketch primitive.
• The annotation primitive will comprise of various parameters that define the labels.
• Here we are aiming for manual annotations. The parameters will be provided by the user through the command line. ”in” followed by various parameters some of which are:
  • Position
  • Text - leader line
  • Additional object reference name

Container for annotations