from vtkplotter import Plotter, Plane, datadir
vp = Plotter()
cow = vp.load(datadir + "cow.byu", c="grey", alpha=0.7)
vp += Plane(pos=[0, -3.6, 0], normal=[0, 1, 0], sx=20).texture("grass")
vp.show(viewup='y', interactive=0)
# vp.light() returns a vtkLight object with focal Point, fp, to mesh cow
# fp can also be explicitly set as fp=[x,y,z]
l = vp.addLight(pos=[-6, 6, 6], focalPoint=cow, deg=12, showsource=1)
# can be switched on/off this way
#l.SwitchOff()
vp.show(interactive=1)
from vtkplotter import Plotter, Text2D, Arrow, datadir
vp = Plotter(axes=1)
ambient, diffuse, specular = 0.1, 0., 0.
specularPower, specularColor = 20, 'white'
for i in range(8):
s = vp.load(datadir + 'pumpkin.vtk', c='gold')
s.normalize().pos((i % 4) * 2.2, int(i < 4) * 3, 0)
#s.phong()
s.flat()
# modify the default with specific values
s.lighting('default', ambient, diffuse, specular, specularPower,
specularColor)
#ambient += 0.125
diffuse += 0.125
specular += 0.125
vp += Text2D(__doc__)
vp.show()
print('Adding a light source..')
p = (3, 1.5, 3)
f = (3, 1.5, 0)
vp.addLight(pos=p, focalPoint=f)
vp += Arrow(p, f, s=0.01, c='gray', alpha=0.2)
vp.show()
