Hi,
I've walked through the many helpful demos and examples of the Tcl3D package. But nearly all using Display Lists or immediate mode. But I could not find any information how to use Vertex Buffer Objects from TCL3D. Does anyone know some references about
this topic?

Thanks

Hans

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Am 16.07.2022 um 21:40 schrieb Hans Nikolaus Beck:

Hi,
I've walked through the many helpful demos and examples of the Tcl3D package. But nearly all using Display Lists or immediate mode. But I could not find any information how to use Vertex Buffer Objects from TCL3D. Does anyone know some references about

this topic?

Thanks

Hans

Hi Hans,

look into the Nopper tutorials (http://www.tcl3d.org/cgi-bin/demolist2.tcl?dir=TutorialsAndBooks/Nopper)
These use new OpenGL features like shaders, buffer objects, ...

Paul

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Paul Obermeier schrieb am Samstag, 16. Juli 2022 um 22:31:54 UTC+2:

Am 16.07.2022 um 21:40 schrieb Hans Nikolaus Beck:

Hi,
I've walked through the many helpful demos and examples of the Tcl3D package. But nearly all using Display Lists or immediate mode. But I could not find any information how to use Vertex Buffer Objects from TCL3D. Does anyone know some references

about this topic?

Thanks

Hans

Hi Hans,

look into the Nopper tutorials (http://www.tcl3d.org/cgi-bin/demolist2.tcl?dir=TutorialsAndBooks/Nopper)
These use new OpenGL features like shaders, buffer objects, ...

Paul

Thx ! 😊

Hans

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On 7/17/2022 1:10 AM, Hans Nikolaus Beck wrote:

Hi,
I've walked through the many helpful demos and examples of the Tcl3D package. But nearly all using Display Lists or immediate mode. But I could not find any information how to use Vertex Buffer Objects from TCL3D. Does anyone know some references about

this topic?

Thanks

Hans

Hans,

Not relevant to your question, but you were asking about Vulkan bindings
for Tcl. If anyone would know, that would be Paul :-)

/Ashok

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@Paul: just for interest: is there some work on integrating Vulkan to TCL in the same way as this wonderful TCL3D? Not strict need for it, only curious...

Cheers

Hans

Paul Obermeier schrieb am Samstag, 16. Juli 2022 um 22:31:54 UTC+2:

Am 16.07.2022 um 21:40 schrieb Hans Nikolaus Beck:

Hi,
I've walked through the many helpful demos and examples of the Tcl3D package. But nearly all using Display Lists or immediate mode. But I could not find any information how to use Vertex Buffer Objects from TCL3D. Does anyone know some references

about this topic?

Thanks

Hans

Hi Hans,

look into the Nopper tutorials (http://www.tcl3d.org/cgi-bin/demolist2.tcl?dir=TutorialsAndBooks/Nopper)
These use new OpenGL features like shaders, buffer objects, ...

Paul

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I'm not planning to write a Tcl wrapper for Vulkan, as Vulkan is too low-level and complicated for such a task.

What I'm watching is the development of VulkanSceneGraph. A 1.0 release of VSG is planned this year.
Maybe I then try to wrap VSG for Tcl similar to the OpenSceneGraph wrapper.

Regards,
Paul

@Paul: just for interest: is there some work on integrating Vulkan to TCL in the same way as this wonderful TCL3D? Not strict need for it, only curious...

Cheers

Hans

Paul Obermeier schrieb am Samstag, 16. Juli 2022 um 22:31:54 UTC+2:

Am 16.07.2022 um 21:40 schrieb Hans Nikolaus Beck:

Hi,
I've walked through the many helpful demos and examples of the Tcl3D package. But nearly all using Display Lists or immediate mode. But I could not find any information how to use Vertex Buffer Objects from TCL3D. Does anyone know some references

about this topic?

Thanks

Hans

Hi Hans,

look into the Nopper tutorials (http://www.tcl3d.org/cgi-bin/demolist2.tcl?dir=TutorialsAndBooks/Nopper)
These use new OpenGL features like shaders, buffer objects, ...

Paul

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Hi Paul,

thank you for your answer. I can understand that completely. After playing with Vulkan a little bit I've got also the impression that it is ver adaptable but complicated, indeed. Regarding typical use cases for TCL, OpenGL is absolutely fine.
The VulkanSceneGraph is an interesting information, new to me :)

Just a note to my original question: I've looked at the demos you mentioned, and in principle I've got it. But I'm struggling to differ between Vertex Array, Vertex Array Objects, and Vertex Object Buffers. Are they more ore less the same? Well, its an
pure OpenGL question.... sorry for that :)

Regards

Hans

Paul Obermeier schrieb am Montag, 18. Juli 2022 um 20:36:49 UTC+2:

I'm not planning to write a Tcl wrapper for Vulkan, as Vulkan is too low-level and complicated for such a task.

What I'm watching is the development of VulkanSceneGraph. A 1.0 release of VSG is planned this year.
Maybe I then try to wrap VSG for Tcl similar to the OpenSceneGraph wrapper.

Regards,
Paul

@Paul: just for interest: is there some work on integrating Vulkan to TCL in the same way as this wonderful TCL3D? Not strict need for it, only curious...

Cheers

Hans

Paul Obermeier schrieb am Samstag, 16. Juli 2022 um 22:31:54 UTC+2:

Am 16.07.2022 um 21:40 schrieb Hans Nikolaus Beck:

Hi,
I've walked through the many helpful demos and examples of the Tcl3D package. But nearly all using Display Lists or immediate mode. But I could not find any information how to use Vertex Buffer Objects from TCL3D. Does anyone know some references

about this topic?

Thanks

Hans

Hi Hans,

look into the Nopper tutorials (http://www.tcl3d.org/cgi-bin/demolist2.tcl?dir=TutorialsAndBooks/Nopper)
These use new OpenGL features like shaders, buffer objects, ...

Paul

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Vertex Arrays are the old style (fixed-function pipeline) to specify a bunch of vertices with 1 call instead of using multiple glVertex* calls. See ex. https://www.opengl.org/sdk/docs/tutorials/CodeColony/vertexarrays.php

VAO and VBO are the new style for shader-based OpenGL. See ex. https://www.khronos.org/opengl/wiki/Vertex_Specification

Paul

Am 19.07.2022 um 18:38 schrieb Hans Nikolaus Beck:

Hi Paul,

thank you for your answer. I can understand that completely. After playing with Vulkan a little bit I've got also the impression that it is ver adaptable but complicated, indeed. Regarding typical use cases for TCL, OpenGL is absolutely fine.
The VulkanSceneGraph is an interesting information, new to me :)

Just a note to my original question: I've looked at the demos you mentioned, and in principle I've got it. But I'm struggling to differ between Vertex Array, Vertex Array Objects, and Vertex Object Buffers. Are they more ore less the same? Well, its an

pure OpenGL question.... sorry for that :)

Regards

Hans

Paul Obermeier schrieb am Montag, 18. Juli 2022 um 20:36:49 UTC+2:

I'm not planning to write a Tcl wrapper for Vulkan, as Vulkan is too low-level and complicated for such a task.

What I'm watching is the development of VulkanSceneGraph. A 1.0 release of VSG is planned this year.
Maybe I then try to wrap VSG for Tcl similar to the OpenSceneGraph wrapper. >>
Regards,
Paul

@Paul: just for interest: is there some work on integrating Vulkan to TCL in the same way as this wonderful TCL3D? Not strict need for it, only curious...

Cheers

Hans

Paul Obermeier schrieb am Samstag, 16. Juli 2022 um 22:31:54 UTC+2:

Am 16.07.2022 um 21:40 schrieb Hans Nikolaus Beck:

Hi,
I've walked through the many helpful demos and examples of the Tcl3D package. But nearly all using Display Lists or immediate mode. But I could not find any information how to use Vertex Buffer Objects from TCL3D. Does anyone know some references

about this topic?

Thanks

Hans

Hi Hans,

look into the Nopper tutorials (http://www.tcl3d.org/cgi-bin/demolist2.tcl?dir=TutorialsAndBooks/Nopper)
These use new OpenGL features like shaders, buffer objects, ...

Paul

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