/*!
* @brief intersects a polygon with a map, adding any results to output map
*
* @param[out] resultMap output map (must be allocated)
* @param[in] polygon to be intersected
* @param[in] map intersected against
* @param[in] lock to use when adding output polygons to result map
*
*/
void OverlayOnePolygonWithMap(Polygon_map_t *resultMap, RPolygon *myPoly, Polygon_map_t *map2, tbb::spin_mutex *rMutex) {
int r1, g1, b1, r2, g2, b2;
int myr=0;
int myg=0;
int myb=0;
int p1Area = myPoly->area();
for(unsigned int j=1; (j < map2->size()) && (p1Area > 0); j++) {
RPolygon *p2 = (*map2)[j];
RPolygon *pnew;
int newxMin, newxMax, newyMin, newyMax;
myPoly->getColor(&r1, &g1, &b1);
if(PolygonsOverlap(myPoly, p2, newxMin, newyMin, newxMax, newyMax)) {
p2->getColor(&r2, &g2, &b2);
myr = r1 + r2;
myg = g1 + g2;
myb = b1 + b2;
pnew = RPolygon::alloc_RPolygon(newxMin, newyMin, newxMax, newyMax, myr, myg, myb);
p1Area -= pnew->area(); // when all the area of the polygon is accounted for, we can quit.
if(rMutex) {
tbb::spin_mutex::scoped_lock lock(*rMutex);
#if _DEBUG
pnew->print(int(resultMap->size()));
#endif
resultMap->push_back(pnew);
}
else {
#ifdef _DEBUG
pnew->print(int(resultMap->size()));
#endif
resultMap->push_back(pnew);
}
}
}
}
