93 lines
2.1 KiB
Python
93 lines
2.1 KiB
Python
from grid import grid as basegrid
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from baker.tools import exact_func, smblog
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import numpy as np
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class grid(basegrid):
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def __init__(self, points, q):
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basegrid.__init__(self, points, q)
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def for_qhull_generator(self):
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"""
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this returns a generator that should be fed into qdelaunay
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"""
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yield '2';
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yield '%d' % len(self.points)
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for p in self.points:
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yield "%f %f" % (p[0], p[1])
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def for_qhull(self):
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"""
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this returns a single string that should be fed into qdelaunay
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"""
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r = '2\n'
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r += '%d\n' % len(self.points)
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for p in self.points:
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r += "%f %f\n" % (p[0], p[1])
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return r
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class rect_grid(grid):
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def __init__(self, xres = 5, yres = 5):
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xmin = -1.0
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xmax = 1.0
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xspan = xmax - xmin
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xdel = xspan / float(xres - 1)
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ymin = -1.0
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ymay = 1.0
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yspan = ymay - ymin
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ydel = yspan / float(yres - 1)
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points = []
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q = []
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for x in xrange(xres):
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cur_x = xmin + (x * xdel)
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for y in xrange(yres):
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cur_y = ymin + (y * ydel)
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points.append([cur_x, cur_y])
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q.append(exact_func((cur_x, cur_y)))
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grid.__init__(self, points, q)
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self.construct_connectivity()
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class random_grid(rect_grid):
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def __init__(self, num_points = 10):
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smblog.debug("number of points: %d" % num_points)
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points = []
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q = []
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r = np.random
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appx_side_res = int(np.sqrt(num_points))
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smblog.debug("appx_side_res: %d" % appx_side_res)
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delta = 1.0 / float(appx_side_res)
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for x in xrange(appx_side_res + 1):
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cur_x = x * delta
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for cur_y in (0, 1):
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new_point = [cur_x, cur_y]
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points.append(new_point)
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q.append(exact_func(new_point))
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for y in xrange(appx_side_res + 1):
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cur_y = y * delta
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for cur_x in (0, 1):
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new_point = [cur_x, cur_y]
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points.append(new_point)
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q.append(exact_func(new_point))
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for i in xrange(num_points):
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cur_x = r.rand()
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cur_y = r.rand()
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points.append([cur_x, cur_y])
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q.append( exact_func( (cur_x, cur_y) ) )
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grid.__init__(self, points, q)
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self.points = np.array(self.points)
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self.q = np.array(self.q)
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