Happy to see it coming in handy xD Not sure how you found it though, maybe Google?
I can’t help you with MPxLocatorNode::draw other than to say “don’t use it”. That’s Legacy Viewport stuff. If you absolutely have to use it - some are still stuck on Legacy Viewport unfortunately - then read no further as this only applies to Viewport 2. 1. Implement a MPxDrawOverride for your MPxLocatorNode 2. In that subclass, implement addUIDrawables 3. Use MUIDrawManager for your debug draw The draw manager has a fantastic and simple API for drawing the basic stuff you need for debugging, like lines, spheres, HUD elements, you name it. Just look at this API, it’s great. Especially compared to drawing with barebones OpenGL. - https://help.autodesk.com/view/MAYAUL/2020/ENU/?guid=__cpp_ref_class_m_h_w_render_1_1_m_px_draw_override_html MColor red(1.0f, 0.0f, 0.0f); painter.beginDrawable(); painter.setColor( red ); painter.line( MPoint(0, 0, 0), MPoint(1, 1, 1) ); painter.line( MPoint(0, 0, 0), MPoint(-1, -1, 5) ); painter.endDrawable(); With this, your the addUIDrawables function is called under 3 conditions. 1. It’s set to be always dirty 2. It’s told to be dirty 3. Maya’s viewport is force refreshed, or otherwise force dirtied You can tell it to always be dirty, in which case it’ll update alongside any update to the viewport. See isAlwaysDirty - https://help.autodesk.com/view/MAYAUL/2020/ENU/?guid=__cpp_ref_class_m_h_w_render_1_1_m_px_draw_override_html Without that, you can tell it to be dirty from within itself or another node, by calling: MHWRender::MRenderer::setGeometryDrawDirty(thisMObject()); This should be what you’re looking for. Ideally it would happen in your MPxLocatorNode::compute, whereby your locator has an attribute that is affected by your deformer. E.g. MyDeformer::deformed -> MyLocator::wasDeformed. Then your deformed could just MPlug::setBool() on that attribute, and your locator would oblige. Side question, is it a good approach to link 2 nodes, with one for debugging ? It sounds clean and maya-friendly to me, but I’d be curious to know if there are other valid approaches? Totally reasonable. Draw nodes for drawing things, deform nodes for deforming things. You’d normally wrap these up in a command that creates, names and connects these as appropriate. Also mark one of the nodes as automatically deleted once the connections between them is removed. On Tue, 14 Dec 2021 at 10:51, vince touache <[email protected]> wrote: > hi folks, > > I'm building an MPxLocatorNode to use in combination with an > MPxDeformerNode for debugging purpose (i.e. *Deformer* sends custom data > to *Locator* that will in turn draw those data, thanks to Marcus' repo > <https://gist.github.com/mottosso/f2d520af4dea5bc7b07576e02d544c65>) > My problem is with evaluation; I would like to update *Locator* everytime > *Deformer::deform() > *is called, but instead, *Locator*'s evaluation is hooked to > *Deformer::compute(), > *whose triggering is not in sync with *Deformer::deform()* > I'm a bit rusty when it comes to nodes evaluations, so I tried to play > with attributeAffects but falls into a loop (e.g. if *Deformer.inputGeom* > affects *Deformer.outputData*, I get a crash (from an evaluation loop, I > suppose) > > What would be a clean way to make sure my *Locator::draw()* is triggered > when my *Deformer::deform()* is called? > > Side question, is it a good approach to link 2 nodes, with one for > debugging ? It sounds clean and maya-friendly to me, but I'd be curious to > know if there are other valid approaches? > > Thank you > > -- > You received this message because you are subscribed to the Google Groups > "Python Programming for Autodesk Maya" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/python_inside_maya/9be7e4ae-1108-4f8e-901d-ad2d7e591010n%40googlegroups.com > <https://groups.google.com/d/msgid/python_inside_maya/9be7e4ae-1108-4f8e-901d-ad2d7e591010n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Python Programming for Autodesk Maya" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/python_inside_maya/CAFRtmODiPX_nT21S1Aef_jczd61pXonjqnZk64hfscf2psQCxw%40mail.gmail.com.
