Le dimanche 26 juillet 2020 19:35:27 UTC+2, Landry Kotto a écrit : > > > 0 > > in the method ItemAt (region) of class GLViewWidget, I don't understand > parameters w and h. > > In the documentation they say: " " "Return a list of the items displayed > in the region (x, y, w, h) relative to the widget." " " > > I know that x and y can be obtained as follows: self.mousePos.x () and > self.mousePos.y (). What values must be entered in the parameters w and h? > is it elevation and azimuth respectively? I don't think. > > Indeed, *I would like to be able to pick a point with extremely precision* > in the 3D space in the GLViewWidget which contain as many GLScatterPlotItem > as there are they points. by this way, I can get the region of the mouse > using the method ItemAt(x,y,w,h). x, y can be obtained by : > self.mousePos.x(), self.mousePos.y() and *I don't now how to fix w and h > to get an extremely precision of region point's region in the 3D Space. I > would like to pick a point with very small size maybe. Any idea ?* > > Also, I would like to know the best way to select(or pick) a point in a 3S > Space. I have thow options : > > 1. create as many instance of GLScatterPlotItem for each point I wand > to plot By this way each point is a GLScatterPlotItem and I it's easy to > pick each. By this way the visuel is a bit slow. > 2. create one instance of GLScatterPlotItem which contains all my > points. then add it in the GLViewWidget. > *By this way, the visuel is more rapid and fluent but I don't know how > i can't distinguish a specific point in a 3D Space. Any idea ?* > > Thans for advance. >
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