53 lines
2.6 KiB
C++
53 lines
2.6 KiB
C++
/********************************************************************************
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* ReactPhysics3D physics library, http://www.reactphysics3d.com *
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* Copyright (c) 2010-2020 Daniel Chappuis *
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*********************************************************************************
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* *
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* This software is provided 'as-is', without any express or implied warranty. *
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* In no event will the authors be held liable for any damages arising from the *
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* use of this software. *
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* *
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* Permission is granted to anyone to use this software for any purpose, *
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* including commercial applications, and to alter it and redistribute it *
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* freely, subject to the following restrictions: *
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* *
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* 1. The origin of this software must not be misrepresented; you must not claim *
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* that you wrote the original software. If you use this software in a *
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* product, an acknowledgment in the product documentation would be *
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* appreciated but is not required. *
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* *
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* 2. Altered source versions must be plainly marked as such, and must not be *
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* misrepresented as being the original software. *
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* *
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* 3. This notice may not be removed or altered from any source distribution. *
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* *
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********************************************************************************/
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// Libraries
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#include <reactphysics3d/mathematics/Vector2.h>
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// Namespaces
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using namespace reactphysics3d;
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// Return the corresponding unit vector
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Vector2 Vector2::getUnit() const {
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decimal lengthVector = length();
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if (lengthVector < MACHINE_EPSILON) {
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return *this;
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}
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// Compute and return the unit vector
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decimal lengthInv = decimal(1.0) / lengthVector;
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return Vector2(x * lengthInv, y * lengthInv);
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}
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// Return one unit orthogonal vector of the current vector
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Vector2 Vector2::getOneUnitOrthogonalVector() const {
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decimal l = length();
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assert(l > MACHINE_EPSILON);
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return Vector2(-y / l, x / l);
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}
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