35 lines
1.2 KiB
Plaintext
35 lines
1.2 KiB
Plaintext
// Filename: linearRandomForce.I
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// Created by: charles (19Jun00)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) 2001 - 2004, Disney Enterprises, Inc. All rights reserved
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//
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// All use of this software is subject to the terms of the Panda 3d
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// Software license. You should have received a copy of this license
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// along with this source code; you will also find a current copy of
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// the license at http://etc.cmu.edu/panda3d/docs/license/ .
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//
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// To contact the maintainers of this program write to
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// panda3d-general@lists.sourceforge.net .
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//
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////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////
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// Function : random_unit_vector
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// Access : Protected
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// Description : generates a random unit vector
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////////////////////////////////////////////////////////////////////
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INLINE LVector3f LinearRandomForce::
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random_unit_vector() {
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float z, r, theta;
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z = 1.0f - (2.0f * bounded_rand());
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r = sqrtf(1.0f - (z * z));
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theta = 2.0f * 3.1415926f * bounded_rand();
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return LVector3f(r * cosf(theta), r * sinf(theta), z);
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}
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