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#!/usr/bin/env python
import sys
from math import cos, pi, sin
from qt import QApplication
from Qwt3D import ParametricSurface, RGBA, SurfacePlot, Triple, NOCOORD
class Sphere(ParametricSurface):
def __init__(self, *args):
ParametricSurface.__init__(self, *args)
self.setMesh(41, 31)
self.setDomain(0, 2*pi, 0, pi)
self.setPeriodic(False, False)
# __init__()
def __call__(self, u, v):
r = 1.0
return Triple(r*cos(u)*sin(v), r*sin(u)*sin(v), r*cos(v))
# __call__()
# class Sphere
class Plot(SurfacePlot):
def __init__(self, *args):
SurfacePlot.__init__(self, *args)
self.setTitle("A Simple Parametric Surface Demonstration")
self.setBackgroundColor(RGBA(1.0, 1.0, 0.6))
sphere = Sphere(self)
sphere.create()
self.setRotation(45, 15, 0)
self.setCoordinateStyle(NOCOORD);
self.updateData()
self.updateGL()
# __init__()
# class Plot
def make():
demo = Plot()
demo.show()
# Matrox cards on Linux work better with a resize() after show()
demo.resize(600, 400)
return demo
# make()
def main(args):
app = QApplication(args)
demo = make()
app.setMainWidget(demo)
app.exec_loop()
# main()
# Admire
if __name__ == '__main__':
main(sys.argv)
# Local Variables: ***
# mode: python ***
# End: ***
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