void renderForce(int posX, int posY, const FloatCoord<2>& force, LibGeoDecomp::GridBase<Cell, 2> *grid, const Region<2>& validRegion)
{
int size = 10;
Region<2> newRegion;
for (int y = -size; y < size; ++y) {
newRegion << Streak<2>(Coord<2>(posX - size, posY + y), posX + size);
}
Region<2> relevantRegion = newRegion & validRegion;
for (Region<2>::StreakIterator i = relevantRegion.beginStreak();
i != relevantRegion.endStreak();
++i) {
for (Coord<2> c = i->origin; c.x() < i->endX; ++c.x()) {
Cell cell = grid->get(c);
cell.setForceVario(force[0], force[1]);
grid->set(c, cell);
}
}
}
