IntDistanceMeasure2D
Value members
Concrete methods
A 'next event' search when the quadtree is used to store spans (intervals).
It assumes that a span or interval is represented by a point whose x coordinate
corresponds to the span's start and whose y coordinate corresponds to the span's stop.
Furthermore, it allows for spans to be unbounded: A span which does not have a defined
start, should use quad.left as the x coordinate, and a span which does not have a defined
stop, should use quad.right as the y coordinate. A span denoting the special value 'void'
(no extent) can be encoded by giving it quad.right as x coordinate.
A 'next event' search when the quadtree is used to store spans (intervals).
It assumes that a span or interval is represented by a point whose x coordinate
corresponds to the span's start and whose y coordinate corresponds to the span's stop.
Furthermore, it allows for spans to be unbounded: A span which does not have a defined
start, should use quad.left as the x coordinate, and a span which does not have a defined
stop, should use quad.right as the y coordinate. A span denoting the special value 'void'
(no extent) can be encoded by giving it quad.right as x coordinate.
The measure searches for the next 'event' beginning from the query point which is supposed
to have x == y == query-time point. It finds the closest span start or span stop which
is greater than or equal to the query-time point, i.e. the nearest neighbor satisfying
qx >= x || qy >= y (given the special treatment of unbounded coordinates).
- Value Params
- quad
the tree's root square which is used to deduce the special values for representing unbounded spans
- Returns
the measure instance
A 'previous event' search when the quadtree is used to store spans (intervals).
It assumes that a span or interval is represented by a point whose x coordinate
corresponds to the span's start and whose y coordinate corresponds to the span's stop.
Furthermore, it allows for spans to be unbounded: A span which does not have a defined
start, should use quad.left as the x coordinate, and a span which does not have a defined
stop, should use quad.right as the y coordinate. A span denoting the special value 'void'
(no extent) can be encoded by giving it quad.right as x coordinate.
A 'previous event' search when the quadtree is used to store spans (intervals).
It assumes that a span or interval is represented by a point whose x coordinate
corresponds to the span's start and whose y coordinate corresponds to the span's stop.
Furthermore, it allows for spans to be unbounded: A span which does not have a defined
start, should use quad.left as the x coordinate, and a span which does not have a defined
stop, should use quad.right as the y coordinate. A span denoting the special value 'void'
(no extent) can be encoded by giving it quad.right as x coordinate.
The measure searches for the previous 'event' beginning from the query point which is supposed
to have x == y == query-time point. It finds the closest span start or span stop which
is smaller than or equal to the query-time point, i.e. the nearest neighbor satisfying
qx <= x || qy <= y (given the special treatment of unbounded coordinates).
- Value Params
- quad
the tree's root square which is used to deduce the special values for representing unbounded spans
- Returns
the measure instance
Concrete fields
A chebyshev distance measure, based on the maximum of the absolute distances across all dimensions.
A chebyshev distance measure, based on the maximum of the absolute distances across all dimensions.
A measure that uses the euclidean squared distance which is faster than the euclidean distance as the square root does not need to be taken.
A measure that uses the euclidean squared distance which is faster than the euclidean distance as the square root does not need to be taken.
An 'inverted' chebyshev distance measure, based on the minimum of the absolute distances across all dimensions. This is, strictly speaking, only a semi metric, and probably totally useless.
An 'inverted' chebyshev distance measure, based on the minimum of the absolute distances across all dimensions. This is, strictly speaking, only a semi metric, and probably totally useless.