# Geometry Primitive Library

> Provide robust computational geometry primitives

- Skill: `a5c-ai/geometry-primitive-library` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add a5c-ai/geometry-primitive-library`
- Raw SKILL.md: https://api.skillmd.com/api/skills/a5c-ai/geometry-primitive-library/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: a5c-ai (https://skillmd.com/u/a5c-ai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/a5c-ai/geometry-primitive-library

---


# Geometry Primitive Library Skill

## Purpose

Provide robust implementations of computational geometry primitives with proper handling of edge cases and numerical precision.

## Capabilities

- Point, line, segment, polygon classes
- Cross product, dot product operations
- CCW/CW orientation tests
- Area calculations
- Intersection tests
- Distance calculations

## Target Processes

- computational-geometry

## Geometric Primitives

### Point Operations
- Point addition, subtraction
- Scalar multiplication
- Dot product
- Cross product
- Distance calculation

### Line/Segment Operations
- Line-line intersection
- Segment-segment intersection
- Point-line distance
- Point-segment distance
- Parallel/perpendicular tests

### Polygon Operations
- Area calculation (signed and unsigned)
- Point in polygon test
- Polygon centroid
- Convexity test

## Input Schema

```json
{
  "type": "object",
  "properties": {
    "primitive": {
      "type": "string",
      "enum": ["point", "line", "segment", "polygon", "circle"]
    },
    "operations": { "type": "array" },
    "language": {
      "type": "string",
      "enum": ["cpp", "python", "java"]
    },
    "useInteger": { "type": "boolean", "default": false },
    "epsilon": { "type": "number" }
  },
  "required": ["primitive"]
}
```

## Output Schema

```json
{
  "type": "object",
  "properties": {
    "success": { "type": "boolean" },
    "code": { "type": "string" },
    "operations": { "type": "array" },
    "precisionNotes": { "type": "string" }
  },
  "required": ["success", "code"]
}
```