Hi, I’d like to draw point or point cloud objects with colours and transparency individually set for each point. I managed to set individual colours by setting ON_PointCloud::m_C in the case of point cloud. But, transparency set in the same way as the colour is effective only when it is the drawn a…

Hi, @takahashi-kazu Try CDisplayPipelineAttributes these properties, where ERhinoPointStyle // Points specific attributes... public: bool m_bShowPoints; int m_nPointSize; ERhinoPointStyle m_ePointStyle; Everybody’s on vacation. I pretend I know something. …

Hi @Easy , Thanks a lot for your response, while you’re on vacation too I assume. I guess the properties are effective to all point objects in a document, but I’d like to set them for each object individually.

Hi, @Takahashi-Kazu Like this? [image] If it was in a DisplayConduit, I would do this: int count = points.Count(); int alpha = i * (255 / count); ON_Color _color(255, 0, 0,alpha); dp.DrawPoint(points[i], 4, RPS_ROUND_DOT, _color);

Hi @Easy , Thanks!! it seems what I wanted. I haven’t used DisplayConduit before, but I try.

Is there any way to do the same for PointCloud objects – to set colour and transparency for each point?

afaik no. PointCloud is a compacted data structure which doesn’t allow much per-point customization.

@stevebaer - is this something you can help with? – Dale

Point clouds do not currently support transparency.

@stevebaer , Thanks for the info. Then, point could shown with transparency when “square with white centre” in display options is selected is not an expected behaviour? It would be appreciated if you could consider supporting it in the future release.

Point/point cloud with transparency

Rhino Developer

Easy (Easy) December 28, 2020, 2:47pm 6

If you want to set the point color in the RhinoDoc.
This should help you
https://discourse.mcneel.com/t/how-to-color-point-in-c-sdk/114860

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Point/point cloud with transparency

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