def __init__(self, data_points, num_samples_rendering = (34, 34)):
'''
data_points is in row major order, namely the 16 rows of the array
correspond to (s,t) values (0,0), (0,1),(0,2), (0,3), (1, 0), (1,1),...
and so on.
num_samples_rendering refers to the number of samples that would be used
by the draw_scene() function when rendering the patch
'''
Model.__init__(self)
self.data_points = data_points
self.num_samples_rendering = num_samples_rendering
self.B = np.linalg.inv( [ [0, 1, 8, 27], [0, 1, 4, 9], [0, 1, 2, 3], [1, 1, 1, 1]])
self.MatX = np.dot( np.transpose(self.B), np.dot( np.reshape(data_points[:,0], (4,4)), self.B ))
self.MatY = np.dot( np.transpose(self.B), np.dot( np.reshape(data_points[:,1], (4,4)), self.B ))
self.MatZ = np.dot( np.transpose(self.B), np.dot( np.reshape(data_points[:,2], (4,4)), self.B ))
def __init__(self, data_points = None, num_samples_rendering = 101):
'''
A set of data points can be optionally provided during instantiaion.
The format is a list of tuples, where each tuple consists of a point
and tangent at that point. Both point and tangents are represented by
arrays.
[(p0, m0), (p1, m1), (p2, m2)] where point p0 = [x0, y0, z0] and
m0 = [mx0, my0, mz0] the tangent at p0, and so on.
'''
Model.__init__(self)
self.num_samples_rendering = num_samples_rendering
self.B_Hermite = inv([[0, 1, 0, 3], [0, 1, 0, 2], [0, 1, 1, 1], [1, 1, 0, 0]])
self.coeff_matrix = [] # list of basis vector matrices for each segment
self.point_tangent_list = []
if data_points is not None:
set_data(data_points)
def __init__(self, terrain_model, subscene_list = []):
Model.__init__(self)
self.terrain_model = terrain_model
self.subscene_list = subscene_list