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Add back code to clip polygons against land mass. This temporarily breaks

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the ability for roads/railways to bridge ocean, but I hope to get that fixed
soon.
This commit is contained in:
curt 2003-03-11 20:19:09 +00:00
parent ea58728f5c
commit b3935db989
1 changed files with 12 additions and 9 deletions
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21
src/BuildTiles/Clipper/clipper.cxx
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@ -471,14 +471,14 @@ bool FGClipper::clip_all(const point2d& min, const point2d& max) {
polygon_union( land_mask, polys_in.polys[DefaultArea][i] );
}
// set up a mask for inland water.
TGPolygon inland_water_mask;
inland_water_mask.erase();
// set up a mask for all water.
TGPolygon water_mask;
water_mask.erase();
for ( i = 0; i < FG_MAX_AREA_TYPES; i++ ) {
if (is_water_area(AreaType(i))) {
for (unsigned int j = 0; j < polys_in.polys[i].size(); j++) {
inland_water_mask =
polygon_union(inland_water_mask, polys_in.polys[i][j]);
water_mask =
polygon_union(water_mask, polys_in.polys[i][j]);
}
}
}
@ -505,17 +505,20 @@ bool FGClipper::clip_all(const point2d& min, const point2d& max) {
tmp = current;
// if not a hole, clip the area to the land_mask
if ( i != HoleArea ) {
tmp = polygon_int( tmp, land_mask );
}
// Airport areas are limited to existing land mass and
// never override water.
if ( i == AirportArea ) {
tmp = polygon_int(tmp, land_mask);
tmp = polygon_diff(tmp, inland_water_mask);
tmp = polygon_diff(tmp, water_mask);
}
// if a water area, cut out potential islands
if ( i == LakeArea || i == IntLakeArea || i == ReservoirArea ||
i == IntReservoirArea || i == StreamArea || i == CanalArea ||
i == OceanArea ) {
if ( is_water_area(AreaType(i)) ) {
// clip against island mask
tmp = polygon_diff( tmp, island_mask );
}