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- """Add an observer to specific objects in a scene"""
- from vedo import printc, Mesh, dataurl, Text2D, Plotter
- import numpy as np
- # -----------------------
- def func(obj, name=None):
- printc("Plotter callback", c="m")
- # -----------------------
- def ftxt(obj, ename):
- printc("Text2D callback", obj.__class__.__name__, ename, c="y")
- obj.color(np.random.rand() * 10)
- # -----------------------
- def fmsh(obj, ename):
- printc("Mesh callback", obj.__class__.__name__, ename, c="b")
- msh.color(np.random.rand() * 10)
- msh = Mesh(dataurl + "spider.ply")
- cid2 = msh.add_observer("pick", fmsh)
- txt = Text2D("CLICK ME", pos="bottom-center", s=3, bg="yellow5").pickable()
- cid1 = txt.add_observer("pick", ftxt)
- plt = Plotter()
- # plt.add_observer("mouse click", func) ### SAME AS:
- # plt.add_callback("mouse click", func, enable_picking=False)
- plt.show(txt, msh, __doc__).close()
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