yang686526

region hatching problem .. urgent
region hatching problem .. urgent
i am creating a hatch by passing oddbobjectidarray to appendloop array. i am using the function
void oddbhatch::appendloop(odint32 looptype,
const oddbobjectidarray& dbobjids)
but i am not able to use the island options by this function. so how can i use these function for hatching.
and i also want to hatch the intersection area of two entity like intersection area of circle and circle or intersection area of circle and rectangle etc.
do we have any functions in oddb to do these operations.
urgent required
thanks in advance
you need to create separate loop for each island (and external of cause)
dd contains no functionality for hatching intersection area of 2 entities (you need provide the loops explicitly)
sergey slezkin
could you please explain that what do u mean by loop? if i have intersection of two circle and i want to hatch the intersection region then what should i pass in the function.
and suppose i have four concentric circle and i want to hatch only the outermost circle then how can i do that .
thanks sergey for response .. and plzz find this solution for me
attached files (24.0 kb, 7 views)

loop is a closed path defining one of hatch boundaries. it can be defined by polyline or by a set of edges which can be of the following types: line segment, circular arc, elliptic arc, nurb curve.
each segment must start at the end of pevious one.
to hatch the region between 2 circles you need to make 2 loops (each one of one circle). one of the loops is external and the second represents the island.
to hatch the intersection area of rectangle and ellipse you need to make one loop which consists of 2 edges: elliptical arc and line.
sergey slezkin
thanks sergey
u cleared almost all of my doubts.
just one thing that there are so many options like
:kdefaults :kouter :koutermost etc.
if do all the loop making then what is the use of these parameters.
thanks
see
sergey slezkin
thanks sergey