HFNOC/Signal-Server
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Fixup some arithmetic. Still no grenwich

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Gareth Evans
2017-06-08 23:49:04 +01:00
parent c8f044380f
commit 5ea0e1f1c5
2 changed files with 24 additions and 15 deletions
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27
inputs.cc
View File

@@ -329,7 +329,7 @@ int loadLIDAR(char *filenames)
for (size_t i = 0; i < fc; i++) {
if ( smallest_res == 0 || tiles[i].resolution < smallest_res ){
smallest_res = tiles[i].resolution;
pix_per_deg = MAX(tiles[i].width,tiles[i].height) / MAX(tiles[i].max_north - tiles[i].min_north, tiles[i].max_west - tiles[i].min_west);
pix_per_deg = MAX(tiles[i].width,tiles[i].height) / MAX(tiles[i].max_north - tiles[i].min_north, tiles[i].max_west - tiles[i].min_west >= 0 ? tiles[i].max_west - tiles[i].min_west : tiles[i].max_west + (360 - tiles[i].min_west));
}
}
@@ -342,8 +342,12 @@ int loadLIDAR(char *filenames)
}
/* Now we work out the size of the giant lidar tile. */
double total_width = max_west - min_west;
double total_width = max_west - min_west >= 0 ? max_west - min_west : max_west + (360 - min_west);
double total_height = max_north - min_north;
if (debug) {
fprintf(stderr, "totalwidth: %.7f - %.7f = %.7f\n", max_west, min_west, total_width);
fprintf(stderr,"mw:%lf Mnw:%lf\n", max_west, min_west);
}
/* This is how we should _theoretically_ work this out, but due to
* the nature of floating point arithmetic and rounding errors, we need to
* crunch the numbers the hard way */
@@ -354,7 +358,7 @@ int loadLIDAR(char *filenames)
size_t new_width = 0;
for ( size_t i = 0; i < fc; i++ ) {
double north_offset = max_north - tiles[i].max_north;
double west_offset = max_west - tiles[i].max_west;
double west_offset = max_west - tiles[i].max_west >= 0 ? max_west - tiles[i].max_west : max_west + (360 - tiles[i].max_west);
size_t north_pixel_offset = north_offset * pix_per_deg;
size_t west_pixel_offset = west_offset * pix_per_deg;
@@ -366,6 +370,10 @@ int loadLIDAR(char *filenames)
size_t new_tile_alloc = new_width * new_height;
int * new_tile = (int*) calloc( new_tile_alloc, sizeof(int) );
if ( new_tile == NULL ){
free(tiles);
return ENOMEM;
}
if (debug)
fprintf(stderr,"Lidar tile dimensions w:%lf(%zu) h:%lf(%zu)\n", total_width, new_width, total_height, new_height);
@@ -374,13 +382,14 @@ int loadLIDAR(char *filenames)
/* Fill out the array one tile at a time */
for (size_t i = 0; i< fc; i++) {
double north_offset = max_north - tiles[i].max_north;
double west_offset = max_west - tiles[i].max_west;
double west_offset = max_west - tiles[i].max_west >= 0 ? max_west - tiles[i].max_west : max_west + (360 - tiles[i].max_west);
size_t north_pixel_offset = north_offset * pix_per_deg;
size_t west_pixel_offset = west_offset * pix_per_deg;
if (debug) {
fprintf(stderr,"mn: %lf mw:%lf globals: %lf %lf\n", tiles[i].max_north, tiles[i].max_west, max_north, max_west);
fprintf(stderr,"Offset n:%zu w:%zu\n", north_pixel_offset, west_pixel_offset);
fprintf(stderr,"Offset n:%zu(%lf) w:%zu(%lf)\n", north_pixel_offset, north_offset, west_pixel_offset, west_offset);
fprintf(stderr,"Height: %d\n", tiles[i].height);
}
@@ -389,12 +398,12 @@ int loadLIDAR(char *filenames)
register int *dest_addr = &new_tile[ (north_pixel_offset+h)*new_width + west_pixel_offset];
register int *src_addr = &tiles[i].data[h*tiles[i].width];
// Check if we might overflow
if ( dest_addr + tiles[i].width > new_tile + new_tile_alloc ){
if ( dest_addr + tiles[i].width > new_tile + new_tile_alloc || dest_addr < new_tile ){
if (debug)
fprintf(stderr, "Overflow %zu\n",i);
continue;
}
//fprintf(stderr,"dest:%p src:%p\n", dest_addr, src_addr);
// fprintf(stderr,"dest:%p src:%p\n", dest_addr, src_addr);
memcpy( dest_addr, src_addr, tiles[i].width * sizeof(int) );
}
}
@@ -437,8 +446,8 @@ int loadLIDAR(char *filenames)
ippd=IPPD;
// height = (unsigned)((max_north-min_north) / smCellsize);
// width = (unsigned)((max_west-min_west) / smCellsize);
height = (unsigned)((max_north-min_north) * pix_per_deg);
width = (unsigned)((max_west-min_west) * pix_per_deg);
height = (unsigned)((total_height) * pix_per_deg);
width = (unsigned)((total_width) * pix_per_deg);
if (debug)
fprintf(stderr, "LIDAR LOADED %d x %d\n", width, height);

12
tiles.cc
View File

@@ -67,11 +67,11 @@ int tile_load_lidar(tile_t *tile, char *filename){
// fprintf(stderr,"%d, %d, %.7f, %.7f, %.7f, %.7f, %.7f\n",width,height,xll,yll,cellsize,yur,xur);
// Greenwich straddling hack
if (tile->xll <= 0 && tile->xur > 0) {
tile->xll = (tile->xur - tile->xll); // full width
tile->xur = 0.0; // budge it along so it's west of greenwich
delta = eastoffset; // add to Tx longitude later
} else {
// if (tile->xll <= 0 && tile->xur > 0) {
// tile->xll = (tile->xur - tile->xll); // full width
// tile->xur = 0.0; // budge it along so it's west of greenwich
// delta = eastoffset; // add to Tx longitude later
// } else {
// Transform WGS84 longitudes into 'west' values as society finishes east of Greenwich ;)
if (tile->xll >= 0)
tile->xll = 360-tile->xll;
@@ -81,7 +81,7 @@ int tile_load_lidar(tile_t *tile, char *filename){
tile->xll = tile->xll * -1;
if(tile->xur < 0)
tile->xur = tile->xur * -1;
}
// }
if (debug)
fprintf(stderr, "POST yll %.7f yur %.7f xur %.7f xll %.7f delta %.6f\n", tile->yll, tile->yur, tile->xur, tile->xll, delta);