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Fixed a clipping bug (polygons specified in wrong order).

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Touched up a few compiler warnings.
This commit is contained in:
curt 1999-03-19 00:26:18 +00:00
parent 62670d0514
commit d3f68ace94
2 changed files with 46 additions and 13 deletions
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49
Clipper/clipper.cxx
View file

@ -122,11 +122,11 @@ bool FGClipper::load_polys(const string& path) {
gpc_add_contour( poly, &v_list );
int area = (int)poly_type;
if ( area < FG_MAX_AREAS ) {
if ( area < FG_MAX_AREA_TYPES ) {
polys_in.polys[area].push_back(poly);
} else {
FG_LOG( FG_CLIPPER, FG_ALERT, "Polygon type out of range = "
<< poly_type);
<< (int)poly_type);
exit(-1);
}
}
@ -143,7 +143,8 @@ bool FGClipper::load_polys(const string& path) {
// Do actually clipping work
bool FGClipper::clip_all(const point2d& min, const point2d& max) {
gpc_polygon accum, result_diff, result_union, tmp;
gpc_polygon accum, result_union, tmp;
gpc_polygon *result_diff;
gpcpoly_iterator current, last;
FG_LOG( FG_CLIPPER, FG_INFO, "Running master clipper" );
@ -173,7 +174,7 @@ bool FGClipper::clip_all(const point2d& min, const point2d& max) {
gpc_add_contour( &polys_in.safety_base, &v_list );
// process polygons in priority order
for ( int i = 0; i < FG_MAX_AREAS; ++i ) {
for ( int i = 0; i < FG_MAX_AREA_TYPES; ++i ) {
current = polys_in.polys[i].begin();
last = polys_in.polys[i].end();
@ -183,22 +184,46 @@ bool FGClipper::clip_all(const point2d& min, const point2d& max) {
#ifdef EXTRA_SAFETY_CLIP
// clip to base tile
gpc_polygon_clip(GPC_INT, &polys_in.safety_base, *current, &tmp);
gpc_polygon_clip(GPC_INT, *current, &polys_in.safety_base, &tmp);
#else
&tmp = *current;
tmp = *current;
#endif
// clip current polygon against previous higher priority
// stuff
result_diff = new gpc_polygon;
result_diff->num_contours = 0;
result_diff->contour = NULL;
if ( accum.num_contours == 0 ) {
result_diff = tmp;
*result_diff = tmp;
result_union = tmp;
} else {
gpc_polygon_clip(GPC_DIFF, &accum, &tmp, &result_diff);
gpc_polygon_clip(GPC_UNION, &accum, &tmp, &result_union);
gpc_polygon_clip(GPC_DIFF, &tmp, &accum, result_diff);
gpc_polygon_clip(GPC_UNION, &tmp, &accum, &result_union);
}
polys_clipped.polys[i].push_back(&result_diff);
/*
cout << "original contours = " << tmp.num_contours << endl;
for ( int j = 0; j < tmp.num_contours; j++ ) {
for (int k = 0;k < tmp.contour[j].num_vertices;k++ ) {
cout << tmp.contour[j].vertex[k].x << ","
<< tmp.contour[j].vertex[k].y << endl;
}
}
cout << "clipped contours = " << result_diff->num_contours << endl;
for ( int j = 0; j < result_diff->num_contours; j++ ) {
for (int k = 0;k < result_diff->contour[j].num_vertices;k++ ) {
cout << result_diff->contour[j].vertex[k].x << ","
<< result_diff->contour[j].vertex[k].y << endl;
}
}
*/
polys_clipped.polys[i].push_back(result_diff);
accum = result_union;
}
}
@ -222,6 +247,10 @@ bool FGClipper::clip_all(const point2d& min, const point2d& max) {
// $Log$
// Revision 1.4 1999/03/19 00:26:18 curt
// Fixed a clipping bug (polygons specified in wrong order).
// Touched up a few compiler warnings.
//
// Revision 1.3 1999/03/17 23:48:58 curt
// minor renaming and a bit of rearranging.
//

8
Clipper/clipper.hxx
View file

@ -57,7 +57,7 @@ typedef gpcpoly_container::iterator gpcpoly_iterator;
typedef gpcpoly_container::const_iterator const_gpcpoly_iterator;
#define FG_MAX_AREAS 20
#define FG_MAX_AREA_TYPES 20
#define EXTRA_SAFETY_CLIP
#define FG_MAX_VERTICES 100000
@ -70,7 +70,7 @@ public:
class FGgpcPolyList {
public:
gpcpoly_container polys[FG_MAX_AREAS];
gpcpoly_container polys[FG_MAX_AREA_TYPES];
gpc_polygon safety_base;
};
@ -109,6 +109,10 @@ public:
// $Log$
// Revision 1.5 1999/03/19 00:26:19 curt
// Fixed a clipping bug (polygons specified in wrong order).
// Touched up a few compiler warnings.
//
// Revision 1.4 1999/03/18 04:31:10 curt
// Let's not pass copies of huge structures on the stack ... ye might see a
// segfault ... :-)