LM.txt file - Revision history

Trainlover16: /* Breakdown of LOD Mesh File */

2022-03-19T01:20:45Z

Breakdown of LOD Mesh File

← Older revision		Revision as of 01:20, 19 March 2022
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	'''''Note:'''''<br>		'''''Note:'''''<br>
	As of build 4.1 an alternative to the use of the ":Cull" appendage to the attachment point name is to simply omit the attachment point from the lower-detail mesh. If the attachment point does not exist in the mesh then no attempt is made to render an attachment when the mesh is rendered. It is possible to use the cull method and the missing attachment point method in the same asset, which might be relevant when creating a new low-detail mesh for an existing asset.		As of build 4.1 an alternative to the use of the ":Cull" appendage to the attachment point name is to simply omit the attachment point from the lower-detail mesh. If the attachment point does not exist in the mesh then no attempt is made to render an attachment when the mesh is rendered. It is possible to use the cull method and the missing attachment point method in the same asset, which might be relevant when creating a new low-detail mesh for an existing asset.

			** in trying this method on trainz2019 all attachments present in the first lod remain "active" in all other lod levels regardless of rather or not they are present in later levels. i.e. If you have a mesh attached to attachment "a.door" in Lod0 and you omit attachment "a.door" from the lower level lods the attached mesh will still appear at that attachment in those levels as if the attachment is still there... may be a bug******

	'''''Note:'''''<br>		'''''Note:'''''<br>
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	att-parent default		att-parent default
	}		}



	==.txt file extension==		==.txt file extension==

Windwalkr at 10:18, 12 September 2017

2017-09-12T10:18:24Z

← Older revision		Revision as of 10:18, 12 September 2017
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	Assets with LOD reduction must be made with ~~'indexed meshes' or~~ [[IM files]] only (exported from ~~3DSMax~~, Blender, etc.)		Assets with LOD reduction must be made with [[IM files]] or [[trainzmesh file]]s only (exported from [[Autodesk 3DS Max]], Blender, etc.)

	Trainz locates these ~~.im~~ files through paths specified in the .lm.txt (LOD mesh file) which is in turn referenced via the asset's config.txt file.		Trainz locates these mesh files through paths specified in the .lm.txt (LOD mesh file) which is in turn referenced via the asset's config.txt file.

Sailordan: Add note re alternative to :cull

2016-05-24T00:34:55Z

Add note re alternative to :cull

← Older revision		Revision as of 00:34, 24 May 2016
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	Attachment culling cannot be made to work by modifying the config.txt file; you must modify the model's attachment names.		Attachment culling cannot be made to work by modifying the config.txt file; you must modify the model's attachment names.

			'''''Note:'''''<br>
			As of build 4.1 an alternative to the use of the ":Cull" appendage to the attachment point name is to simply omit the attachment point from the lower-detail mesh. If the attachment point does not exist in the mesh then no attempt is made to render an attachment when the mesh is rendered. It is possible to use the cull method and the missing attachment point method in the same asset, which might be relevant when creating a new low-detail mesh for an existing asset.

	'''~~NOTE~~:''' The [[LM.txt file]]s, .im meshes, and textures must be located within the same directory.		'''''Note:'''''<br>
			The [[LM.txt file]]s, .im meshes, and textures must be located within the same directory.

Glt0145 at 10:41, 25 February 2015

2015-02-25T10:41:31Z

← Older revision		Revision as of 10:41, 25 February 2015
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	'''NOTE:''' ~~Keep in mind all~~ [[LM.txt file]]s, .im meshes, and textures must be located within the same directory.		'''NOTE:''' The [[LM.txt file]]s, .im meshes, and textures must be located within the same directory.

Glt0145 at 10:32, 25 February 2015

2015-02-25T10:32:04Z

← Older revision		Revision as of 10:32, 25 February 2015
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	Keep in mind all [[LM.txt file]]s, .im meshes, and textures must be located within the same directory.		'''NOTE:''' Keep in mind all [[LM.txt file]]s, .im meshes, and textures must be located within the same directory.

Retro00064: /* .txt file extension */ fixed header size.

2013-02-15T11:55:19Z

.txt file extension: fixed header size.

← Older revision		Revision as of 11:55, 15 February 2013
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	=.txt file extension=		==.txt file extension==
	[[LM.txt file]]s have a ".LM.txt" name extension, however when a model file is specified within a [[config.txt file]] or similar, the ".txt" must be omitted, leaving the ".LM" extension. For example, a model file named ''box.LM.txt'' is specified in a [[KIND Traincar]] config file using the syntax ''mesh "box.lm"''.		[[LM.txt file]]s have a ".LM.txt" name extension, however when a model file is specified within a [[config.txt file]] or similar, the ".txt" must be omitted, leaving the ".LM" extension. For example, a model file named ''box.LM.txt'' is specified in a [[KIND Traincar]] config file using the syntax ''mesh "box.lm"''.

	[[Category:File formats]]		[[Category:File formats]]
	[[Category:Modeling]]		[[Category:Modeling]]

Retro00064: Replaced Category:Blender with Category:Modeling; more generic category.

2013-02-15T11:54:15Z

Replaced Category:Blender with Category:Modeling; more generic category.

← Older revision		Revision as of 11:54, 15 February 2013
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	[[Category:File formats]]		[[Category:File formats]]
	[[Category:~~Blender~~]]		[[Category:Modeling]]

Windwalkr at 09:03, 12 February 2013

2013-02-12T09:03:47Z

← Older revision		Revision as of 09:03, 12 February 2013
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	[[Level of Detail]] (or 'LOD') is a technique used for asset mesh reduction. Trainz uses a different mesh dependant on the viewing distance. For objects further away a simpler, less detailed mesh is used. [[LM.txt file]]s provide one LOD technique, which is commonly used for [[KIND Traincar]] and [[KIND Bogey]] assets. For other asset types, other [[Level of Detail\|LOD techniques]] are generally more suitable.		[[Level of Detail]] (or 'LOD') is a technique used for asset mesh reduction. Trainz uses a different mesh dependant on the viewing distance. For objects further away a simpler, less detailed mesh is used. [[LM.txt file]]s provide one LOD technique, which is commonly used for [[KIND Traincar]] and [[KIND Bogey]] assets. For other asset types, other [[Level of Detail\|LOD techniques]] are generally more suitable.

	In the example of the PB15 loco below there are four meshes, the closest being a highly detailed normal ~~mapped~~ model of the loco body, and the farthest being a simple mesh of the shape with the texture and, in this case, with very simple low poly representations of the bogeys. ''(more on this below)''		In the example of the PB15 loco below there are four meshes, the closest being a highly detailed [[normal map]]ped model of the loco body, and the farthest being a simple mesh of the shape with the texture and, in this case, with very simple low poly representations of the bogeys. ''(more on this below)''

	Do not use separate textures for each LOD mesh; the same texture can be used for all because textures have their own built-in LOD reduction.		Do not use separate textures for each LOD mesh; the same texture can be used for all because textures have their own built-in LOD reduction.

Windwalkr at 08:22, 12 February 2013

2013-02-12T08:22:35Z

← Older revision		Revision as of 08:22, 12 February 2013
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	==Usage==		==Usage==

	[[Level of Detail]] (or 'LOD') is a technique used for asset mesh reduction. Trainz uses a different mesh dependant on the viewing distance. For objects further away a simpler, less detailed mesh is used. [[LM.txt file]]s provide one LOD technique, which is commonly used for [[KIND Traincar]] and [[KIND Bogey]] assets. For other asset types, other LOD techniques are generally more suitable.		[[Level of Detail]] (or 'LOD') is a technique used for asset mesh reduction. Trainz uses a different mesh dependant on the viewing distance. For objects further away a simpler, less detailed mesh is used. [[LM.txt file]]s provide one LOD technique, which is commonly used for [[KIND Traincar]] and [[KIND Bogey]] assets. For other asset types, other [[Level of Detail\|LOD techniques]] are generally more suitable.

	In the example of the PB15 loco below there are four meshes, the closest being a highly detailed normal mapped model of the loco body, and the farthest being a simple mesh of the shape with the texture and, in this case, with very simple low poly representations of the bogeys. ''(more on this below)''		In the example of the PB15 loco below there are four meshes, the closest being a highly detailed normal mapped model of the loco body, and the farthest being a simple mesh of the shape with the texture and, in this case, with very simple low poly representations of the bogeys. ''(more on this below)''
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	=.txt file extension=		=.txt file extension=
	[[LM.txt file]]s have a ".LM.txt" name extension, however when a model file is specified within a [[config.txt file]] or similar, the ".txt" must be omitted, leaving the ".LM" extension. For example, a model file named ''box.LM.txt'' is specified in a [[KIND Traincar]] config file using the syntax ''mesh "box.lm"''.		[[LM.txt file]]s have a ".LM.txt" name extension, however when a model file is specified within a [[config.txt file]] or similar, the ".txt" must be omitted, leaving the ".LM" extension. For example, a model file named ''box.LM.txt'' is specified in a [[KIND Traincar]] config file using the syntax ''mesh "box.lm"''.

	~~''TBD: LM vs lod-model''~~

	[[Category:File formats]]		[[Category:File formats]]
	[[Category:Blender]]		[[Category:Blender]]

Pev at 07:52, 12 February 2013

2013-02-12T07:52:44Z

← Older revision		Revision as of 07:52, 12 February 2013
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	default		default
	{		{
	mesh "PB_15_body/PB_15_body.lm" <---- ''Note the "lm" file extension here''		mesh "PB_15_body/PB_15_body.lm" <---- ''Note the "lm" file extension here (lowercase of "LM")''
	auto-create 1		auto-create 1
	}		}