PointEvaluator

function Pointevaluator(
	[kernel!::Function],
	oa_args::Array{<:Tuple{<:Any, DataType},1};
	kwargs...)

Generates a PointEvaluator that can evaluate the specified operator evaluations at arbitrary points. If no kernel function is given, the arguments are given directly. If a kernel is provided, the arguments are postprocessed accordingly and the kernel has to be conform to the interface

kernel!(result, eval_args, qpinfo)

where qpinfo allows to access information at the current evaluation point. Additionally the length of the result needs to be specified via the kwargs.

Evaluation can be triggered via the evaluate function after an initialize! call.

Operator evaluations are tuples that pair a tag (to identify an unknown or the position in the vector) with a FunctionOperator.

Keyword arguments:

• resultdim: dimension of result field (default = length of operators). Default: 0

• params: array of parameters that should be made available in qpinfo argument of kernel function. Default: nothing

• name: name for operator used in printouts. Default: ''PointEvaluator''

• verbosity: verbosity level. Default: 0

function eval_func(PE::PointEvaluator)

Yields the function (result, x) -> evaluate!(result,PE,x).

function eval_func_bary(PE::PointEvaluator)

Yields the function (result, xref, item) -> evaluate_bary!(result,PE,xref,item).

function evaluate!(
	result,
	PE::PointEvaluator,
	x
	)

Evaluates the PointEvaluator at the specified coordinates x. (To do so it internally calls CellFinder to find the cell and the barycentric coordinates of x and calls evaluate_bary!.)

function evaluate_bary!(
	result,
	PE::PointEvaluator,
	xref, 
	item
	)

Evaluates the PointEvaluator at the specified reference coordinates in the cell with the specified item number.

function initialize!(
	O::PointEvaluator,
	sol;
	time = 0,
	kwargs...)

Initializes the PointEvaluator for the specified solution.