There is unfortunately no simple way to add hatch filling.
To apply hatch filling, there are two possibilities:
- Create sample copies of the filled area, centered on (0,0) and extending to [-1, 1] . Now create one hg transform object for each destination location, and copyobj() the sample object to parent it to the hg transform object, and set the Matrix property of the hg transform object to scale and translate it to the desired position. This approach has the advantage of only having to figure out the hatch pattern once per different hatch. This approach has the disadvantage of requiring separate copies of the objects and seperate hg transform objects for each desired location.
- Create extensive Vertices and Faces lists combining all of the hatch objects to be created, and create a single patch() object that combines information for all of the hatches together. This approach has the advantage of only using a single graphics object. This approach has the disadvantage of making it more difficult to program the hatch objects and to program different colors for the different objects.
