31 lines
1009 B
Plaintext
31 lines
1009 B
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) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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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 LVector3 LinearRandomForce::
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random_unit_vector() {
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PN_stdfloat z, r, theta;
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z = 1.0 - (2.0 * bounded_rand());
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r = csqrt(1.0 - (z * z));
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theta = 2.0 * MathNumbers::pi * bounded_rand();
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return LVector3(r * ccos(theta), r * csin(theta), z);
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}
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