HowTo/Build a bridge

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== Creating a Bridge in GMax ==
 
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This tutorial will show you the steps needed to create a model in GMax 1.2 and then the creation of the config file and the directory structure required for the use of the bridge in TRS 2012. We will build a basic concrete single track bridge. A bridge in Trainz consists of three sections "initiator", mesh-table default section and the "terminator". Normally the initiator and terminator are the same as far as the creation in GMax is concerned. The mesh-table default section is the section in Trainz that expands as you lengthen your bridge in Trainz. 
 
  
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Open the Gmax application using the Train Content Creation Studio icon. There are a few things that need to be considered. The most important is track gauge as this obviously effects the width of the bridge deck. In this case I will be designing a narrow gauge bridge so the overall width will be 3660 mm and each girder will be 15000 mm long and 915 mm high.
 
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I will assume that you have some experience in using the GMax environment. Create a box that is the dimensions shown above and make it 3 segments high and 3 segments wide. Convert it to an editable mesh. Open up the front view to full screen. Open the "Modify" tab and then open the editable mesh tree so you can modify the vertices individually. Select the bottom two vertices on the left hand side. The "X" value should show -1830 , you need to over type this with -1700. This will move the two vertices towards the middle of the bridge. Do the same with the right hand side bottom two vertices. Change the value from 1830 to 1700. now you should have ended up with the image below
 
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[[Image:bridge_01.jpg]]
 
  
 
== Notes ==
 
== Notes ==
 
For bridges in TRS 2010 and 2012 need to have "mesh-table" in the config file so as the middle (repeating section) of the bridge actually shows within the simulator. This will need to be added using Content Creator Plus to the config file. In the mesh-table you need to create a "default" value. This default value will the the main (repeating section) of the bridge. Also add an "auto-create" so as it is created automatically in the surveyor.
 
For bridges in TRS 2010 and 2012 need to have "mesh-table" in the config file so as the middle (repeating section) of the bridge actually shows within the simulator. This will need to be added using Content Creator Plus to the config file. In the mesh-table you need to create a "default" value. This default value will the the main (repeating section) of the bridge. Also add an "auto-create" so as it is created automatically in the surveyor.
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== Attachment Points ==
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This was copied from Forums for information on Attachment points for bridges
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The rotating circles you see in the game are added by the Trainz code at the end track attachment points.
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In Gmax you must add two track (or road) attachment points. One at each end of the bridge (a curved bridge requires a lot more).
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1. click on helpers
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2. click on point
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3. click on axis tripod
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4. check the box for constant screen size and set the value to 6 or so.
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5. in the top view add an attachment point to one end of the bridge and name it a.track0a and rotate it so the y axis is pointing away from the center of the bridge.
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6. do the same at the other end of the bridge naming it a.track0b.
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7. position and elevate both as necessary (height may need adjustment after you look at it in surveyor). A good place to start is about 1 ft below the surface of the pavement but this can vary.
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8. add the track info to the config file.
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9. depending on how you have made the bridge you will need to use either a visible road spline or an invisible road spline kuid in the config file.
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Return To
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[[HowTo|How To Guides]]
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[[Category:How-to guides]]

Latest revision as of 22:48, 2 August 2018


[edit] Notes

For bridges in TRS 2010 and 2012 need to have "mesh-table" in the config file so as the middle (repeating section) of the bridge actually shows within the simulator. This will need to be added using Content Creator Plus to the config file. In the mesh-table you need to create a "default" value. This default value will the the main (repeating section) of the bridge. Also add an "auto-create" so as it is created automatically in the surveyor.

[edit] Attachment Points

This was copied from Forums for information on Attachment points for bridges The rotating circles you see in the game are added by the Trainz code at the end track attachment points.

In Gmax you must add two track (or road) attachment points. One at each end of the bridge (a curved bridge requires a lot more).

1. click on helpers

2. click on point

3. click on axis tripod 4. check the box for constant screen size and set the value to 6 or so.

5. in the top view add an attachment point to one end of the bridge and name it a.track0a and rotate it so the y axis is pointing away from the center of the bridge.

6. do the same at the other end of the bridge naming it a.track0b.

7. position and elevate both as necessary (height may need adjustment after you look at it in surveyor). A good place to start is about 1 ft below the surface of the pavement but this can vary.

8. add the track info to the config file.

9. depending on how you have made the bridge you will need to use either a visible road spline or an invisible road spline kuid in the config file.

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