trajax-visualizer

Interactive visualization tool for trajax trajectory planning simulations.

Installation

pip install trajax-visualizer

Or with uv:

uv add trajax-visualizer

Requirements

• Python 3.13+
• Node.js 18+ (required at runtime for generating HTML visualizations)

Usage

Basic Usage

from trajax_visualizer import visualizer, MpccSimulationResult

# Create a visualizer instance
mpcc_viz = visualizer.mpcc()

# After running your simulation, create a result object
result = MpccSimulationResult(
    reference=trajectory,
    states=states,
    optimal_trajectories=optimal_trajectories,
    nominal_trajectories=nominal_trajectories,
    contouring_errors=contouring_errors,
    lag_errors=lag_errors,
    wheelbase=wheelbase,
    max_contouring_error=max_contouring_error,
    max_lag_error=max_lag_error,
)

# Generate visualization
await mpcc_viz(result, key="my-simulation")

Output

Visualizations are saved as:

• <key>.json - Raw simulation data
• <key>.html - Interactive HTML visualization with Plotly

Development

The bundled CLI (visualizer/trajax_visualizer/assets/cli.js) is included in the package distribution. See visualizer/core/README.md for build instructions.

To make sure the CLI bundle is ignored by VCS, run:

git update-index --skip-worktree visualizer/trajax_visualizer/assets/cli.js