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-/*
-* Copyright (c) 2006-2009 Erin Catto http://www.box2d.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 B2_POLYGON_SHAPE_H
-#define B2_POLYGON_SHAPE_H
-
-#include "Box2D/Collision/Shapes/b2Shape.h"
-
-/// A convex polygon. It is assumed that the interior of the polygon is to
-/// the left of each edge.
-/// Polygons have a maximum number of vertices equal to b2_maxPolygonVertices.
-/// In most cases you should not need many vertices for a convex polygon.
-class b2PolygonShape : public b2Shape
-{
-public:
- b2PolygonShape();
-
- /// Implement b2Shape.
- b2Shape* Clone(b2BlockAllocator* allocator) const override;
-
- /// @see b2Shape::GetChildCount
- int32 GetChildCount() const override;
-
- /// Create a convex hull from the given array of local points.
- /// The count must be in the range [3, b2_maxPolygonVertices].
- /// @warning the points may be re-ordered, even if they form a convex polygon
- /// @warning collinear points are handled but not removed. Collinear points
- /// may lead to poor stacking behavior.
- void Set(const b2Vec2* points, int32 count);
-
- /// Build vertices to represent an axis-aligned box centered on the local origin.
- /// @param hx the half-width.
- /// @param hy the half-height.
- void SetAsBox(float32 hx, float32 hy);
-
- /// Build vertices to represent an oriented box.
- /// @param hx the half-width.
- /// @param hy the half-height.
- /// @param center the center of the box in local coordinates.
- /// @param angle the rotation of the box in local coordinates.
- void SetAsBox(float32 hx, float32 hy, const b2Vec2& center, float32 angle);
-
- /// @see b2Shape::TestPoint
- bool TestPoint(const b2Transform& transform, const b2Vec2& p) const override;
-
- /// Implement b2Shape.
- bool RayCast(b2RayCastOutput* output, const b2RayCastInput& input,
- const b2Transform& transform, int32 childIndex) const override;
-
- /// @see b2Shape::ComputeAABB
- void ComputeAABB(b2AABB* aabb, const b2Transform& transform, int32 childIndex) const override;
-
- /// @see b2Shape::ComputeMass
- void ComputeMass(b2MassData* massData, float32 density) const override;
-
- /// Validate convexity. This is a very time consuming operation.
- /// @returns true if valid
- bool Validate() const;
-
- b2Vec2 m_centroid;
- b2Vec2 m_vertices[b2_maxPolygonVertices];
- b2Vec2 m_normals[b2_maxPolygonVertices];
- int32 m_count;
-};
-
-inline b2PolygonShape::b2PolygonShape()
-{
- m_type = e_polygon;
- m_radius = b2_polygonRadius;
- m_count = 0;
- m_centroid.SetZero();
-}
-
-#endif