Cycles Standalone - Caustics

Contributing to Blender
1

Hello,

My question is about Cycles Standalone (GitHub - blender/cycles: The Cycles Render Engine - official mirror).

I would like to add caustics to a xml scene but I don’t see how to do it.

The scene is attached (3 files), it runs with the command: ./cycles Caustics.xml

I understand that I need to interact with the ‘is_caustics_caster’ and ‘is_caustics_receiver’ parameters of the objects (https://github.com/blender/cycles/blob/main/src/scene/object.cpp#L95), but I can’t manage to do it via the xml API.

Could someone please tell me how to proceed?

Note: please be so kind to avoid answers like “the xml API is not a target, you have to use the C++ API, the Python API or Blender directly”. I just want to know if it’s possible via the xml API and, if so, how…
It is within the scope of this project: GitHub - FreeCAD/FreeCAD-render: The Render workbench

Many thanks in advance!

Caustics.xml (1.6 KB)
Caustics_Ground.xml (438 Bytes)
Caustics_Sphere.xml (14.3 KB)

2

Hi,
the XML API is an unfinished proof of concept, it lacks various options. If you like to contribute to the API, more options can be added in cycles/cycles_xml.cpp at main - cycles - Blender Projects

Otherwise I suggest to use the C++ API directly or use the Hydra render delegate.

3

Hello,
Okay, thanks for your reply! I don’t intend to use the C++ API, so I’ll try to improve the xml API.

4

Hello,
For your information: I have submitted a PR (#8 - Cycles Standalone - Expose Object node in XML API - cycles - Blender Projects)

5

Hello,

In the same line, I’ve proposed a new PR to add a few more features to the XML API (vertex normals and tangents attributes on meshes).
Here it is: #9 - Expose vertex normals and tangent space attributes in Cycles XML API - cycles - Blender Projects.

Looking forward to your (positive) feedback!