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diff --git a/thirdparty/bullet/Bullet3Geometry/b3GrahamScan2dConvexHull.h b/thirdparty/bullet/Bullet3Geometry/b3GrahamScan2dConvexHull.h
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-/*
-Bullet Continuous Collision Detection and Physics Library
-Copyright (c) 2011 Advanced Micro Devices, Inc. http://bulletphysics.org
-
-This software is provided 'as-is', without any express or implied warranty.
-In no event will the authors be held liable for any damages arising from the use of this software.
-Permission is granted to anyone to use this software for any purpose,
-including commercial applications, and to alter it and redistribute it freely,
-subject to the following restrictions:
-
-1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
-2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
-3. This notice may not be removed or altered from any source distribution.
-*/
-
-#ifndef B3_GRAHAM_SCAN_2D_CONVEX_HULL_H
-#define B3_GRAHAM_SCAN_2D_CONVEX_HULL_H
-
-#include "Bullet3Common/b3Vector3.h"
-#include "Bullet3Common/b3AlignedObjectArray.h"
-
-struct b3GrahamVector3 : public b3Vector3
-{
- b3GrahamVector3(const b3Vector3& org, int orgIndex)
- : b3Vector3(org),
- m_orgIndex(orgIndex)
- {
- }
- b3Scalar m_angle;
- int m_orgIndex;
-};
-
-struct b3AngleCompareFunc
-{
- b3Vector3 m_anchor;
- b3AngleCompareFunc(const b3Vector3& anchor)
- : m_anchor(anchor)
- {
- }
- bool operator()(const b3GrahamVector3& a, const b3GrahamVector3& b) const
- {
- if (a.m_angle != b.m_angle)
- return a.m_angle < b.m_angle;
- else
- {
- b3Scalar al = (a - m_anchor).length2();
- b3Scalar bl = (b - m_anchor).length2();
- if (al != bl)
- return al < bl;
- else
- {
- return a.m_orgIndex < b.m_orgIndex;
- }
- }
- }
-};
-
-inline void b3GrahamScanConvexHull2D(b3AlignedObjectArray<b3GrahamVector3>& originalPoints, b3AlignedObjectArray<b3GrahamVector3>& hull, const b3Vector3& normalAxis)
-{
- b3Vector3 axis0, axis1;
- b3PlaneSpace1(normalAxis, axis0, axis1);
-
- if (originalPoints.size() <= 1)
- {
- for (int i = 0; i < originalPoints.size(); i++)
- hull.push_back(originalPoints[0]);
- return;
- }
- //step1 : find anchor point with smallest projection on axis0 and move it to first location
- for (int i = 0; i < originalPoints.size(); i++)
- {
- // const b3Vector3& left = originalPoints[i];
- // const b3Vector3& right = originalPoints[0];
- b3Scalar projL = originalPoints[i].dot(axis0);
- b3Scalar projR = originalPoints[0].dot(axis0);
- if (projL < projR)
- {
- originalPoints.swap(0, i);
- }
- }
-
- //also precompute angles
- originalPoints[0].m_angle = -1e30f;
- for (int i = 1; i < originalPoints.size(); i++)
- {
- b3Vector3 xvec = axis0;
- b3Vector3 ar = originalPoints[i] - originalPoints[0];
- originalPoints[i].m_angle = b3Cross(xvec, ar).dot(normalAxis) / ar.length();
- }
-
- //step 2: sort all points, based on 'angle' with this anchor
- b3AngleCompareFunc comp(originalPoints[0]);
- originalPoints.quickSortInternal(comp, 1, originalPoints.size() - 1);
-
- int i;
- for (i = 0; i < 2; i++)
- hull.push_back(originalPoints[i]);
-
- //step 3: keep all 'convex' points and discard concave points (using back tracking)
- for (; i != originalPoints.size(); i++)
- {
- bool isConvex = false;
- while (!isConvex && hull.size() > 1)
- {
- b3Vector3& a = hull[hull.size() - 2];
- b3Vector3& b = hull[hull.size() - 1];
- isConvex = b3Cross(a - b, a - originalPoints[i]).dot(normalAxis) > 0;
- if (!isConvex)
- hull.pop_back();
- else
- hull.push_back(originalPoints[i]);
- }
- }
-}
-
-#endif //B3_GRAHAM_SCAN_2D_CONVEX_HULL_H