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Welcome to the McCode wiki!

2026 update in progress
(If you have issues finding your way, try via our OldHome)

General info, websites and mailinglists

• How McStas/McXtrace works overview
• Official McStas website and McStas user mailinglist
• Official McXtrace website and McXtrace user mailinglist

1. Guides for end-users

• Using McStas or McXtrace

2. Guides for component developers / contributors

• Component development (assumes some knowledge section 1. topics)

3. Information for core developers / contributors

• Core development (assumes some knowledge section 1. and 2. topics)

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4. Migrating from McStas 2.x to 3.x (and McXtrace 1.x to 3.x)

• Overview of differences in "classic McStas McXtrace" and the 3.x versions
• McStas/McXtrace 3 and GPU terminology (table)
• HOWTO: Modifying a McStas 2 instrument for use under McStas 3
• HOWTO: Modifying a McStas 2 component for use under McStas 3
• GPU Debugging tips
• Using Union in McStas 3.x