lsst.pipe.tasks.assembleCoadd Namespace Reference

Classes
class	AssembleCoaddConfig
class	AssembleCoaddTask
class	AssembleCoaddDataIdContainer

Functions
def	_subBBoxIter

Variables
list	__all__ = ["AssembleCoaddTask"]

Function Documentation

def lsst.pipe.tasks.assembleCoadd._subBBoxIter (   bbox,   subregionSize  )

private

Iterate over subregions of a bbox

@param[in] bbox: bounding box over which to iterate: afwGeom.Box2I
@param[in] subregionSize: size of sub-bboxes

@return subBBox: next sub-bounding box of size subregionSize or smaller;
    each subBBox is contained within bbox, so it may be smaller than subregionSize at the edges of bbox,
    but it will never be empty

Definition at line 533 of file assembleCoadd.py.

def _subBBoxIter(bbox, subregionSize):
    """Iterate over subregions of a bbox

    @param[in] bbox: bounding box over which to iterate: afwGeom.Box2I
    @param[in] subregionSize: size of sub-bboxes

    @return subBBox: next sub-bounding box of size subregionSize or smaller;
        each subBBox is contained within bbox, so it may be smaller than subregionSize at the edges of bbox,
        but it will never be empty
    """
    if bbox.isEmpty():
        raise RuntimeError("bbox %s is empty" % (bbox,))
    if subregionSize[0] < 1 or subregionSize[1] < 1:
        raise RuntimeError("subregionSize %s must be nonzero" % (subregionSize,))

    for rowShift in range(0, bbox.getHeight(), subregionSize[1]):
        for colShift in range(0, bbox.getWidth(), subregionSize[0]):
            subBBox = afwGeom.Box2I(bbox.getMin() + afwGeom.Extent2I(colShift, rowShift), subregionSize)
            subBBox.clip(bbox)
            if subBBox.isEmpty():
                raise RuntimeError("Bug: empty bbox! bbox=%s, subregionSize=%s, colShift=%s, rowShift=%s" % \
                    (bbox, subregionSize, colShift, rowShift))
            yield subBBox