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Layout API

Introduction

Welcome Preface

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Getting started Core concepts

Building Layouts

Placement Routing Route profiles Bookmarks Registry and physical test manifests

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Working with PDKs Packages and project environments

Cookbook

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Working with Phoebe

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PDK authoring

Introduction

Welcome Preface

Anatomy

Anatomy of a PDK

Building blocks

Layers and design rules The physical stack Route profiles Components Layer transitions

Packaging & distribution

Packaging - the .lumpdk format Publishing Standard PDK checks and inspection artifacts

Cookbook

Cookbook - a minimal PDK from scratch

Reference & appendices

Manifest schema Glossary API reference

Validation

Introduction

Lumicron Validation API Conventional DRC Semantic DFX Results and applicability

Reference & appendices

Explore

Examples & recipes API reference Offline guides

Documentation editionOctober 2026Python API · Lumicron for Mac

Documentation/API reference/Layout API/PlacementChain.rotate_by

PlacementChain.rotate_by

Rotate by angle degrees CCW, then reapply the selected anchor/constraints.

PlacementChain.rotate_by(angle: 'float') -> 'PlacementChain'

Documentation edition · 6 October 2026Suggest an improvement ↗

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