10.1.10. 3D plots

File 10-3d.py in folder demo/plotting/

import pyopus.plotter as pyopl
from numpy import arange, sin, cos, exp, pi, e, linspace, outer, ones, size

if __name__ == '__main__':
	# Initialize gui thread, clean up. 
	pyopl.init()
	pyopl.close()

	# Plot data - sin(x), cos(x), exp(x/pi) .. for x in [0, 2pi] with 0.2 step. 
	x = arange(0.0, 2*pi, 0.2)
	y1 = sin(x)
	y2 = cos(x)
	y3 = exp(x/pi)
	
	# Create first figure (plot window). This is now the active figure. 
	# Tag is assigned automatically by the system. 
	f1=pyopl.figure(windowTitle="Figure - single axes", figpx=(600,400), dpi=100)	
	
	# Lock the main GUI event loop. This implicitly disables repainting. 
	pyopl.lock(True)
	
	# If the window is closed the C++ part of the object is deleted, 
	# but the PyQt wrapper is still around. Accessing any attribute then 
	# results in an exception. To check if the C++ part is still there, call  
	# the alive() function with figure as argument. 
	if pyopl.alive(f1):
		ax = f1.add_subplot(1, 1, 1, projection='3d')

		u = linspace(0, 2 * pi, 100)
		v = linspace(0, pi, 100)

		x = 10 * outer(cos(u), sin(v))
		y = 10 * outer(sin(u), sin(v))
		z = 10 * outer(ones(size(u)), cos(v))
		
		ax.plot_surface(x, y, z,  rstride=4, cstride=4, color='b')

		# Paint the changes on the screen. 
		pyopl.draw(f1)
		
	# Now unlock the main GUI event loop
	pyopl.lock(False)
	
	# Handle keyboard interrupts properly. 
	pyopl.join()