playrho::d2::ConvexHull Class Reference

Convex hull. More...

#include <MultiShapeConf.hpp>

Collaboration diagram for playrho::d2::ConvexHull:

Public Member Functions
DistanceProxy	GetDistanceProxy () const
	Gets the distance proxy for this convex hull.
NonNegative< Length >	GetVertexRadius () const noexcept
	Gets the vertex radius of this convex hull. More...
ConvexHull &	Transform (const Mat22 &m) noexcept
	Transforms all the vertices by the given transformation matrix. More...

Static Public Member Functions
static ConvexHull	Get (const VertexSet &pointSet, NonNegative< Length > vertexRadius=NonNegative< Length >{DefaultLinearSlop *Real{2}})
	Gets the convex hull for the given set of vertices.

Private Member Functions
	ConvexHull (std::vector< Length2 > verts, std::vector< UnitVec > norms, NonNegative< Length > vr)
	Initializing constructor.

Private Attributes
std::vector< Length2 >	vertices
	Array of vertices. More...
std::vector< UnitVec >	normals
	Normals of edges. More...
NonNegative< Length >	vertexRadius
	Vertex radius. More...

Friends
bool	operator== (const ConvexHull &lhs, const ConvexHull &rhs) noexcept
	Equality operator.
bool	operator!= (const ConvexHull &lhs, const ConvexHull &rhs) noexcept
	Inequality operator.

Detailed Description

Convex hull.

Member Function Documentation

GetVertexRadius()

NonNegative<Length> playrho::d2::ConvexHull::GetVertexRadius ( ) const

inlinenoexcept

Gets the vertex radius of this convex hull.

Returns

Non-negative distance.

Transform()

ConvexHull & playrho::d2::ConvexHull::Transform ( const Mat22 &  m )

noexcept

Transforms all the vertices by the given transformation matrix.

See also

https://en.wikipedia.org/wiki/Transformation_matrix

Referenced by playrho::d2::MultiShapeConf::Transform().

Member Data Documentation

normals

std::vector<UnitVec> playrho::d2::ConvexHull::normals

private

Normals of edges.

These are 90-degree clockwise-rotated unit-vectors of the vectors defined by consecutive pairs of elements of vertices.

Referenced by GetDistanceProxy().

vertexRadius

NonNegative<Length> playrho::d2::ConvexHull::vertexRadius

private

Vertex radius.

This is the radius from the vertex that the shape's "skin" should extend outward by. While any edges — line segments between multiple vertices — are straight, corners between them (the vertices) are rounded and treated as rounded. Shapes with larger vertex radiuses compared to edge lengths therefore will be more prone to rolling or having other shapes more prone to roll off of them.

Note

This should be a non-negative value.

Referenced by GetDistanceProxy(), and GetVertexRadius().

vertices

std::vector<Length2> playrho::d2::ConvexHull::vertices

private

Array of vertices.

Consecutive vertices constitute "edges" of the polygon.

Referenced by GetDistanceProxy().

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The documentation for this class was generated from the following files:

• MultiShapeConf.hpp
• MultiShapeConf.cpp