3. Extending JunctionArt

This guide is for developers who wants to add new features in JunctionArt or build their new types of road artifacts and generators.

3.1. Preparing the development environment

• Install from source Installing from source

• Setup esmini build 1067. Newer versions do not work well with JunctionArt.

3.2. Essential Concepts

• 3.2.1. Junctions
• 3.2.2. Lane Configurations
  • 3.2.2.1. Intersections
  • 3.2.2.2. Non-intersections (2-roads only)
    • 3.2.2.2.1. With new connection road strategies:
      • 3.2.2.2.1.1. Merge at edge
      • 3.2.2.2.1.2. Merge by distance:
      • 3.2.2.2.1.3. Merge at median:
      • 3.2.2.2.1.4. Merge in the middle:
• 3.2.3. Lane Linker
  • 3.2.3.1. Background:
• 3.2.4. Sequential-HDMapBuilder
• 3.2.5. Turn-Merge-Lanes
  • 3.2.5.1. Usage
    • 3.2.5.1.1. 1. Turn lanes at the end of a side:
    • 3.2.5.1.2. 2. Turn lanes at the beginning of a side and merge lanes at the beginning on the other side
    • 3.2.5.1.3. 3. Turn lanes at the beginning of a side and no merge lanes at the beginning on the other side
  • 3.2.5.2. Architecture
    • 3.2.5.2.1. 3 Lane Sections
    • 3.2.5.2.2. Lane Offset Calculations:
• 3.2.6. Utility
  • 3.2.6.1. Transforming roads