# NodeSlicer Path Operations Visual Test Suite

This directory contains visual verifications and plots for all operations in the `Path Operations` node:
- **Maximum Coverage (Union)**: Boolean union of all polygons layer-by-layer.
- **Minimum Coverage**: Per-layer intersection of all objects having paths on that layer (ignoring empty layers so single-object layers are preserved intact).
- **Intersection**: Standard boolean intersection across all inputs.
- **Subtract**: Difference subtracting subsequent inputs from first input.
- **Exclusive Or (XOR)**: Symmetric difference across inputs.
- **Zip Paths**: Layer-by-layer toolpath stream interleaving.
- **Extend Paths**: Sequential toolpath concatenation.

## Visual Gallery
Open `index.html` in your web browser to view the complete visual report with side-by-side before/after plots.

## Summary of Test Cases
| ID | Operation | Test Title | Status | Image |
|---|---|---|---|---|
| TC01 | `MAX_COVERAGE` | Maximum Coverage: Overlapping Squares | **PASS** | [01_max_coverage_overlapping_squares.png](images/01_max_coverage_overlapping_squares.png) |
| TC02 | `MAX_COVERAGE` | Maximum Coverage: Donut with Hole + Solid Box | **PASS** | [02_max_coverage_donut_and_box.png](images/02_max_coverage_donut_and_box.png) |
| TC03 | `MIN_COVERAGE` | Minimum Coverage: Multi-Layer Staggered Objects | **PASS** | [03_min_coverage_staggered_layers.png](images/03_min_coverage_staggered_layers.png) |
| TC04 | `MIN_COVERAGE` | Minimum Coverage: Two Overlapping Squares | **PASS** | [04_min_coverage_overlapping_squares.png](images/04_min_coverage_overlapping_squares.png) |
| TC05 | `MIN_COVERAGE` | Minimum Coverage: Single Object with Multiple Islands | **PASS** | [05_min_coverage_single_object_islands.png](images/05_min_coverage_single_object_islands.png) |
| TC06 | `INTERSECTION` | Boolean Intersection: Multi-Layer Staggered | **PASS** | [06_intersection_staggered_layers.png](images/06_intersection_staggered_layers.png) |
| TC07 | `SUBTRACT` | Subtract: Difference Creating Interior Hole | **PASS** | [07_subtract_hole_creation.png](images/07_subtract_hole_creation.png) |
| TC08 | `XOR` | Exclusive Or (XOR): Symmetric Difference | **PASS** | [08_xor_overlapping_squares.png](images/08_xor_overlapping_squares.png) |
| TC09 | `ZIP` | Zip Paths: Layer-by-Layer Interleaving | **PASS** | [09_zip_paths_layer_interleaving.png](images/09_zip_paths_layer_interleaving.png) |
| TC10 | `EXTEND` | Extend Paths: Sequential Concatenation | **PASS** | [10_extend_paths_sequential.png](images/10_extend_paths_sequential.png) |
| TC11 | `MAX_COVERAGE` | Maximum Coverage: Concentric Perimeters (2 Inputs) | **PASS** | [11_max_coverage_concentric_perimeters.png](images/11_max_coverage_concentric_perimeters.png) |
| TC12 | `MIN_COVERAGE` | Minimum Coverage: Concentric Perimeters (2 Inputs) | **PASS** | [12_min_coverage_concentric_perimeters.png](images/12_min_coverage_concentric_perimeters.png) |
| TC13 | `MAX_COVERAGE` | Maximum Coverage: Single Input with Concentric Shells | **PASS** | [13_max_coverage_single_input_perimeters.png](images/13_max_coverage_single_input_perimeters.png) |
| TC14 | `MIN_COVERAGE` | Minimum Coverage: Single Input with Concentric Shells | **PASS** | [14_min_coverage_single_input_perimeters.png](images/14_min_coverage_single_input_perimeters.png) |

## Running Visual Tests
To regenerate all images and the HTML gallery, run:
```bash
.venv/bin/python -m unittest tests.test_visual_operations
```