clipper1 SKILL.md skillA
clipper1 from znlgis/opengis-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add znlgis/opengis-skills/clipper1@git:20261014.e943c53Pins git:20261014.e943c53 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- znlgis/opengis-skills
- Path
cad/clipper1/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261014.e943c53, committed Oct 14, 2026
- First version recorded
- Sep 1, 2026
- Size
- 8,321 bytes
- Repository stars
- 70
- License
- MIT
Use when maintaining legacy code that depends on Clipper 1.x API for polygon clipping and offsetting. Clipper1: the original widely-deployed polygon boolean library. Prefer Clipper2 for new projects.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
> **项目地址（V6 官方主页）：** <https://sourceforge.net/p/polyclipping/>
>
> **说明：** 原 GitHub 仓库 `github.com/AngusJohnson/Clipper` 现重定向到 Clipper2，V6 末版为 **6.4.2**，已不再新增功能
>
> **NuGet：** `Clipper`（多个第三方移植版）
>
> **许可证：** Boost Software License 1.0
## 概述
Clipper1 主要特征：
- **整数算法**（`IntPoint`），通过 `scale` 系数模拟浮点
- **核心 API**：`Clipper`、`ClipperOffset`、`ClipperBase`
- **支持**：布尔运算 + 偏移 + 多边形简化
- **多语言移植**：C++（含 Header-only）、C#、Delphi/Pascal、JS、Python
> **新项目优先使用 [Clipper2](../clipper2/SKILL.md)**，其性能与 API 均优于 Clipper1。本 SKILL 主要用于维护遗留代码。
---
## 安装
```bash
# C#
dotnet add package Clipper
# JavaScript
npm install js-clipper # 或 clipper-lib
# Python
pip install pyclipper
```
C++ 通常直接拷贝 `clipper.hpp/.cpp` 到工程。
---
## 核心数据结构
```csharp
using ClipperLib;
using IntPoint = ClipperLib.IntPoint;
const long Scale = 1000000; // 浮点 → 整数缩放因子
List<IntPoint> path = new() {
new IntPoint(0, 0),
new IntPoint(100 * Scale, 0),
new IntPoint(100 * Scale, 100 * Scale),
new IntPoint(0, 100 * Scale),
};
List<List<IntPoint>> paths = new() { path };
```
---
## 布尔运算
```csharp
var clipper = new Clipper();
clipper.AddPath(subject, PolyType.ptSubject, true); // true = 闭合
…Read the whole file at its exact version.
How to install
mdr add znlgis/opengis-skills/clipper1@sha256:64bbdb455c95cd64The line at the top of this page pins the label git:20261014.e943c53, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_xw2dll5n4byu6ao7)
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Versions
The registry has recorded 5 versions of this file, between Sep 1, 2026 and Oct 14, 2026, about one every 11 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261014.e943c53 latest | 2026-10-14 | e943c53 | 8,321 B | A | view · diff |
| git:20260922.e0d0947 | 2026-09-22 | e0d0947 | 7,646 B | A | view · diff |
| git:20260911.ad2889a | 2026-09-11 | ad2889a | 7,482 B | A | view · diff |
| git:20260909.72be554 | 2026-09-09 | 72be554 | 7,493 B | A | view · diff |
| git:20260901.fb2a04d | 2026-09-01 | fb2a04d | 7,485 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8321 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
znlgis/opengis-skills · 70 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xw2dll5n4byu6ao7 GET https://markdownregistry.com/api/v1/resolve?ref=znlgis/opengis-skills/clipper1 GET https://markdownregistry.com/api/v1/blob/64bbdb455c95cd6423f735648296e18bb3f41b9c95b316c433edb5aabd8c4121
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.