Hi Pyr, thanks for reaching us. With regard to the issue you reported, it looks like there's something unexpected happening that instead of returning the computed cache, regenerate and returns a new cache. Although it might occur that switching between documents require the generator to recreate the cache, switching between view definitively it's not supposed to happen. Considering that your information doesn't actually help too much in understanding how you're evaluating cache dirtiness nor what changes are you're checking in the vertexmap, could please post fragments of the code or, alternatively, try to reuse your cache dirtiness mechanism on an "simpler" plugin to see if it works reliably? Looking forward further comments, give best. Riccardo

Hi Rage, thanks for reaching us. With regard to the issue mentioned and considering your non-Cinema background, first of all lets settle down a few concepts: UVWTags are just acting as "storage" for the UVW data used on polygonal objects; TextureTags are instead used to create the actual texturing on the on a generic object (whatever it's a polygonal or parametric one) A parametric object can use a texture even without explicit an UVWTag since the TextureTag delivers all the information with regard on how to map a texture to the object. When a parametric object (e.g. cube) is converted into a polygonal one the UVW values which are part of the parametric object gets dumped in the UVWTag that is generated as soon as the conversion ends. That said give a certain object (a polygonal one) the way to go is: def main(): # check that an object is selected if op is None: return # get the active material activeMat = doc.GetActiveMaterial() if activeMat is None: return # instantiate a TextureTag sph50NoTileTextureTag = c4d.TextureTag() if sph50NoTileTextureTag is None: return # set the mapping type sph50NoTileTextureTag[c4d.TEXTURETAG_PROJECTION] = c4d.TEXTURETAG_PROJECTION_SPHERICAL # turn off tiling sph50NoTileTextureTag[c4d.TEXTURETAG_TILE] = False # scale the mapping to 50% on u and v sph50NoTileTextureTag[c4d.TEXTURETAG_LENGTHX] = 0.5 sph50NoTileTextureTag[c4d.TEXTURETAG_LENGTHY] = 0.5 # link to the active material sph50NoTileTextureTag[c4d.TEXTURETAG_MATERIAL] = activeMat # generate the corresponding UVWTag using the mapping settings specific in the TextureTag sph50NoTileUVWTag = c4d.utils.GenerateUVW(op, op.GetMg(), sph50NoTileTextureTag, op.GetMg()) # check for UVWtag being properly created if sph50NoTileUVWTag is None: return # set the name of the tag sph50NoTileUVWTag.SetName('0.5 non-tiled spherical') # add both the UVWTag and the TextureTag if op.GetTag(c4d.Tuvw) is None: op.InsertTag(sph50NoTileUVWTag) if op.GetTag(c4d.Ttexture) is None: op.InsertTag(sph50NoTileTextureTag) # notify Cinema about the changes c4d.EventAdd() Best, Riccardo

Hi Donovan, unfortunately, there is no change in this regards. The best way is still to check for an empty return value or either creates your own dialog. I've filled a feature request. Cheers, Maxime.

Ah, thank you. I didn't take a look at vec.h. Meanwhile, I already wrote a conversion unit to handle all sorts of formatting. Thought, it was possible to modify the intern string conversions somehow. But nevermind, all works pretty well. Cheers, Robert

Hello, GetVirtualObjects() is called when the scene is updated. ExecutePasses() updates the scene. So you want to update the scene while the scene is updated. That's bad. Also, you create a virtual cube and add a tag to that cube. But you do not add the cube to any document. So updating any document would have no effect on that cube. Typically, one does not add a simulation tag to a virtual object. Such a tag is typically added to the generator that create the virtual objects e.g. you add a simulation tag to a MoGraph cloner to animate it virtual child objects. best wishes, Sebastian

@mikeudin We all have to learn C++

Hi @merkvilson, Actually, the issue came from inserting the matrix as a child of the cached spline. The cached spline gets a rotation of X then you apply again the rotation of the generator, which make X+X rotation. In order to avoid that, return one null with both object. def GetVirtualObjects(self, op, hh): if not op.GetDown(): return None gch = op.GetAndCheckHierarchyClone(hh, op.GetDown(), c4d.HIERARCHYCLONEFLAGS_ASIS, False) output = gch["clone"] gchDirty = gch["dirty"] if not gchDirty: return output null = c4d.BaseObject(c4d.Onull) indexView = c4d.BaseObject(1018545) output.InsertUnder(null) indexView.InsertUnder(null) indexView[c4d.ID_MG_MOTIONGENERATOR_MODE] = 0 indexView[c4d.MG_OBJECT_LINK] = output return null If you have any questions, please let me know. Cheers, Maxime

Hello, the message MSG_DESCRIPTION_USERINTERACTION_END has no data. You could store the old value of the parameter in question and check if that value has changed. best wishes, Sebastian

Ok, thanks Riccardo! I'll register them at the start then.

Hi merkvilson, thanks for reaching us. With regard to your question, current Cinema 4D API doesn't deliver the desired behavior. Best, Riccardo

Hello. Thank you very much for your clarification on this. I have a button in MaterialData that saves the material in a specific format in the disk. I doesn't change anything in the material but the MSG_UPDATE is sent anyway. So, since I don't want to run the MSG_UPDATE handler, I have to set a flag to true in order to skip it. Thank you.

Thank you @mp5gosu This is exactly what I was looking for. In fact, C4D does the calculations itself. I thought I had to do the matrix multiplication, and I didn't understand how to do it. Finally it's very simple

This goes off topic so I'll make a new post. The main issue is already solved, thanks to Sebastian!

Hi @a_block Thank you for your answer.

Thanks @Andreas I watched Py-LiquidPainter, but I did not really understand That said, for the parameters, I understood how to do

Hi @rsodre, thanks for your feedback, and glad you solved your issue. Regarding the DisplayControl I let you read this topic: SceneHook and DisplayControl. Manuals, for scenehooks is definitely something we consider. Cheers, Maxime.

Hi Roger, I'm glad you were able to identify the issue and made some progress. And thanks for taking the time to share your findings with the forum. Much appreciated! Cheers, Andreas

Hi Franck, backward and upward compatibility for the current major release is something we really consider and try our best to not break. Unfortunately, for R20 plugins, they need to be recompiled to make them compatible with R20 SP1. See C++ Index or either in the R20.026 changelog. You may encounter an issue with plugin compiled with R20.011 (see the R20.026 changelog) since you may override maxon dedicated IDs which will break for sure some C4D/plugin stuff. Cheers, Maxime.

Sebastian, Added tags. Not really a question but a request. I thought that I had read about people adding a TreeView to the AM using GetDDescription() but maybe it wasn't as well fleshed out as they (or I) suspected. I will look into the custom data type and GUI for it. Please mark as Solved. Thanks! Robert

Hello, Thanks for the responses. I thought that this might be the case and just wanted to clarify it before moving forward. John Thomas