org.tinfour.edge

Class QuadEdgeConstants

java.lang.Object

org.tinfour.edge.QuadEdgeConstants

public final class QuadEdgeConstants
extends Object

Defines constants for use in QuadEdge related operations.

Field Summary

Fields

Modifier and Type	Field and Description
static int	CONSTRAINT_EDGE_FLAG A bit indicating that an edge is constrained.
static int	CONSTRAINT_INDEX_COMPLIMENT
static int	CONSTRAINT_INDEX_MASK A mask that can be anded with the QuadEdgePartner's index field to extract the constraint index, equivalent to the 24 low-order bits.
static int	CONSTRAINT_INDEX_MAX The maximum value of a constraint index based on the three bytes allocated for its storage.
static int	CONSTRAINT_LINE_MEMBER_FLAG A bit indicating that an edge is part of a non-region constraint line.
static int	CONSTRAINT_REGION_BORDER_FLAG A bit indicating that the edge is the border of a constrained region
static int	CONSTRAINT_REGION_INTERIOR_FLAG A bit indicating that an edge is in the interior of a constrained region.
static int	CONSTRAINT_REGION_MEMBER_FLAGS A set of bits combining the constraint region interior and border flags.
static int	SYNTHETIC_EDGE_FLAG A bit indicating that an edge has been marked as synthetic.

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CONSTRAINT_INDEX_MAX

public static final int CONSTRAINT_INDEX_MAX

The maximum value of a constraint index based on the three bytes allocated for its storage. This would be a value of 16777215, or 2^24-1 but we reserve the 3 values at the top for special use. In practice this value is larger than the available memory on many contemporary computers would allow.

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Constant Field Values

CONSTRAINT_INDEX_MASK

public static final int CONSTRAINT_INDEX_MASK

A mask that can be anded with the QuadEdgePartner's index field to extract the constraint index, equivalent to the 24 low-order bits.

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Constant Field Values

CONSTRAINT_INDEX_COMPLIMENT

public static final int CONSTRAINT_INDEX_COMPLIMENT

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Constant Field Values

CONSTRAINT_EDGE_FLAG

public static final int CONSTRAINT_EDGE_FLAG

A bit indicating that an edge is constrained. This bit just happens to be the sign bit, a feature that is exploited by the isConstrained() method.

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Constant Field Values

CONSTRAINT_REGION_BORDER_FLAG

public static final int CONSTRAINT_REGION_BORDER_FLAG

A bit indicating that the edge is the border of a constrained region

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Constant Field Values

CONSTRAINT_REGION_INTERIOR_FLAG

public static final int CONSTRAINT_REGION_INTERIOR_FLAG

A bit indicating that an edge is in the interior of a constrained region.

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Constant Field Values

CONSTRAINT_LINE_MEMBER_FLAG

public static final int CONSTRAINT_LINE_MEMBER_FLAG

A bit indicating that an edge is part of a non-region constraint line. Edges are allowed to be both an interior and a line, so a separate flag bit is required for both cases.

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Constant Field Values

CONSTRAINT_REGION_MEMBER_FLAGS

public static final int CONSTRAINT_REGION_MEMBER_FLAGS

A set of bits combining the constraint region interior and border flags.

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Constant Field Values

SYNTHETIC_EDGE_FLAG

public static final int SYNTHETIC_EDGE_FLAG

A bit indicating that an edge has been marked as synthetic.

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Constant Field Values