From 084dfd08b714faefaea77cb7dc04d2e93dc04b1d Mon Sep 17 00:00:00 2001 From: Stan Seibert Date: Fri, 16 Sep 2011 14:27:46 -0400 Subject: File reorganization to move toward standard python package layout --- sample.py | 56 -------------------------------------------------------- 1 file changed, 56 deletions(-) delete mode 100644 sample.py (limited to 'sample.py') diff --git a/sample.py b/sample.py deleted file mode 100644 index 1909370..0000000 --- a/sample.py +++ /dev/null @@ -1,56 +0,0 @@ -import numpy as np -from chroma.transform import rotate - -def uniform_sphere(size=None, dtype=np.double): - """ - Generate random points isotropically distributed across the unit sphere. - - Args: - - size: int, *optional* - Number of points to generate. If no size is specified, a single - point is returned. - - Source: Weisstein, Eric W. "Sphere Point Picking." Mathworld. - """ - - theta, u = np.random.uniform(0.0, 2*np.pi, size), \ - np.random.uniform(-1.0, 1.0, size) - - c = np.sqrt(1-u**2) - - if size is None: - return np.array([c*np.cos(theta), c*np.sin(theta), u]) - - points = np.empty((size, 3), dtype) - - points[:,0] = c*np.cos(theta) - points[:,1] = c*np.sin(theta) - points[:,2] = u - - return points - -def flashlight(phi=np.pi/4, direction=(0,0,1), size=None, dtype=np.double): - theta, u = np.random.uniform(0.0, 2*np.pi, size), \ - np.random.uniform(np.cos(phi), 1, size) - - c = np.sqrt(1-u**2) - - if np.equal(direction, (0,0,1)).all(): - rotation_axis = (0,0,1) - rotation_angle = 0.0 - else: - rotation_axis = np.cross((0,0,1), direction) - rotation_angle = \ - -np.arccos(np.dot(direction, (0,0,1))/np.linalg.norm(direction)) - - if size is None: - return rotate(np.array([c*np.cos(theta), c*np.sin(theta), u]), - rotation_angle, rotation_axis) - - points = np.empty((size, 3), dtype) - - points[:,0] = c*np.cos(theta) - points[:,1] = c*np.sin(theta) - points[:,2] = u - - return rotate(points, rotation_angle, rotation_axis) -- cgit