Open Game Engine Exchange

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Open Game Engine Exchange

This repository contains reference code for the Open Game Engine Exchange (OpenGEX) file format.

Export Plugins

To use the export plugin for 3ds Max, place the OpenGex.dle file in the Max plugins directory.

To use the export plugin for Maya, place the OpenGex.mll file in the Maya bin/plug-ins directory.

Import Template

The reference importer contains a lot of code that reads an OpenGEX file, validates it, and creates all of the structures necessary to construct a scene. Application-specific processing must be added in the appropriate places to support your own software.

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Need more coding examples

Hello,

I'm new to OpenGEX, however the coding examples are a bit lacking, especially on the import side. There are absolutely no coding examples on how to access any of the data we need.

We need to see C++ coding examples on how to access data from every OpenGEX structure available: Metric GeometryNode GeometryObject Material etc...

Or we need at least a basic C++ program that loads in a OGEX file and prints out every bit of information as text to the commandline.

For example, starting with this:

const Structure *structure = openGexDataDescription.GetRootStructure()->GetFirstSubnode(); while (structure) { // This loops over all top-level structures in the file. // Do something with the data...

   structure = structure->GetNextSubnode();

}

How do we access the 'key' attribute here?

Metric (key = "distance") {float {1}} Metric (key = "angle") {float {1}} Metric (key = "time") {float {1}} Metric (key = "up") {string {"z"}} Metric (key = "forward") {string {"x"}}

Another example, how do we access the 'primitive' attribute here?

GeometryObject $geometry1 // Box001, Box002 { Mesh (primitive = "triangles") { } }

If there's some hidden OpenDDL polymorphism going on, then it's not being adequately explained, which is very frustrating.

Thanks for any help.

opened Jun 24, 2022 by samsonsite1 2

Open

Test suite of .ogex models?

Please make a test suite of .ogex models available on github. OpenGEX only comes with one model, Example.ogex.

Would like to see more, that cover various mesh primitives, vertex attributes, materials, and animation samples.

opened Jun 25, 2022 by samsonsite1 0

Open

OGEX Blender exporter updated for 2.8 mesh api

This updates your blender exporter to use the new 2.8 mesh API and to use Node based materials (using Principled BSDF shader), as blender internal render is no longer supported.

I'm just using this for static scenes so I'm not sure if it works on animated characters. I didn't update the API for shape keys (morph targets) yet, so right now it just ignores shape keys, I'll try and go back and fix that in the future if I have a chance.

Thanks for the OpenGEX pipeline and all the resources you provide!

opened May 27, 2021 by joeld42 2