Where can I find some examples about procedural_viewport, the new function of Procedrual API, please?

[swingpictureECQKB]

Where can I find some examples about procedural_viewport, the new function of Procedrual API, please?

[adrien.herubel · Accepted solution]

We currently don't have public examples of this new API, but here is a short sample showing how to use it to create a bounding box viewport representation in a 3rd party procedural. This viewport representation should be displayed automatically in the DCC viewport, once the procedural is added in the scene.

procedural_viewport
{
    if (mode == AI_PROC_BOXES)
    {
      AtNode* bbox_node = AiNode(universe, "box", "bbox0");
      AiNodeSetVec(bbox_node, "min", -5, -5, -5);
      AiNodeSetVec(bbox_node, "max", 5, 5, 5);
    }
   return AI_SUCCESS;
}

[swingpictureECQKB]

Thank you Adrien, I guess this function only works in viewport of Arnold mode, instead of VP2, in Maya.

[adrien.herubel]

In the Arnold viewport, nothing is needed to display procedurals as they are part of the Arnold scene. The procedural_viewport API is needed to display the procedural in the DCC's own viewport, for example VP2 in Maya.

[swingpictureECQKB]

Hi, @Adrien Herubel. I met a problem when trying a simple procedural with the example of drawing code your posted. After creating the procedural node from Arnold->custom procedrual successfully, I got nothing in Maya's viewport (vp2.0). Should some parameters or options be set or turned on for drawing? Thanks.