JMF (Jackhammer Map Format): Difference between revisions

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(JMF version update, unfortunately)
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The '''Jackhammer Map Format''' ('''JMF''') is a binary file format used by {{jack|4}} to store map project data before being exported to [[MAP]], like [[RMF]]. Unlike RMF, JMF supports objects being part of multiple visgroups, [[KV]]s longer than 15 characters, and Quake III patch meshes. Additionally, it can store [[path entity|paths]] in a slightly different manner, optimized for Jack's [[Path Tool (Jack)|Path Tool]].
The '''Jackhammer Map Format''' ('''JMF''') is a binary file format used by {{jack|4}} to store map project data before being exported to [[MAP]], like [[RMF]]. Unlike RMF, JMF supports objects being part of multiple visgroups, [[KV]]s longer than 15 characters, and Quake III patch meshes. Additionally, it can store [[path entity|paths]] in a slightly different manner, optimized for Jack's [[Path Tool (Jack)|Path Tool]].


{{warning|As of the Christmas 2023 update, JMF files from the latest paid version of Jack cannot be opened in the free version of Jack. The latest free version saves files in JMF version 121, whereas the latest paid version is
{{workaround|Using the paid version of Jack:
* {{goldsrc}} If no KVs are longer than 15 characters:
:: Resave as [[RMF]], then open the [[RMF]].
: {{goldsrc}} If KVs are longer than 15 characters:
:: Resave as [[VMF]] or export to [[MAP]].
* {{quake}} Open the JMF in a "Half-Life / TFC" game configuration, then resave as [[RMF]] or [[VMF]].
* {{quake2}}{{quake3}} Export as [[MAP]].
}}
{{modernConfirm|It may be possible to create a program that strips the extra v122 information to create a v121 JMF, as the only new feature of the new version is background images for the 2D viewports.}}
}}
== Structs ==
== Structs ==


Revision as of 12:13, 30 December 2023

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This page documents information about an engine not developed by Valve. This information is documented here because it has technical and/or historical relevance to Valve's engines.

The Jackhammer Map Format (JMF) is a binary file format used by J.A.C.K. J.A.C.K. to store map project data before being exported to MAP, like RMF. Unlike RMF, JMF supports objects being part of multiple visgroups, KVs longer than 15 characters, and Quake III patch meshes. Additionally, it can store paths in a slightly different manner, optimized for Jack's Path Tool.

Warning.pngWarning:As of the Christmas 2023 update, JMF files from the latest paid version of Jack cannot be opened in the free version of Jack. The latest free version saves files in JMF version 121, whereas the latest paid version is
PlacementTip.pngWorkaround:Using the paid version of Jack:
  • GoldSrc If no KVs are longer than 15 characters:
Resave as RMF, then open the RMF.
GoldSrc If KVs are longer than 15 characters:
Resave as VMF or export to MAP.
  • Quake Open the JMF in a "Half-Life / TFC" game configuration, then resave as RMF or VMF.
  • Quake IIQuake III Export as MAP.
Confirm:It may be possible to create a program that strips the extra v122 information to create a v121 JMF, as the only new feature of the new version is background images for the 2D viewports.

Structs

See also

External links

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