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Add FEET_PER_MILE macro and use it throughout

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The macro replaces uses of the float value 5280.0 (being the
number of feet in a mile).

This improves readability, particularly for readers from metric
backgrounds.
This commit is contained in:
albert
2017-08-24 13:06:50 +02:00
parent 01b1cbe624
commit 3059e1a6a6
4 changed files with 21 additions and 20 deletions
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12
models/los.cc
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@@ -251,7 +251,7 @@ void PlotLOSPath(struct site source, struct site destination, char mask_value,
if ((GetMask(path.lat[y], path.lon[y]) & mask_value) == 0
&& can_process(path.lat[y], path.lon[y])) {
distance = 5280.0 * path.distance[y];
distance = FEET_PER_MILE * path.distance[y];
tx_alt = earthradius + source.alt + path.elevation[0];
rx_alt =
earthradius + destination.alt + path.elevation[y];
@@ -265,7 +265,7 @@ void PlotLOSPath(struct site source, struct site destination, char mask_value,
for (x = y, block = 0; x >= 0 && block == 0; x--) {
distance =
5280.0 * (path.distance[y] -
FEET_PER_MILE * (path.distance[y] -
path.distance[x]);
test_alt =
earthradius + (path.elevation[x] ==
@@ -352,7 +352,7 @@ void PlotPropPath(struct site source, struct site destination,
char fd_buffer[64];
int buffer_offset = 0;
distance = 5280.0 * path.distance[y];
distance = FEET_PER_MILE * path.distance[y];
xmtr_alt =
four_thirds_earth + source.alt + path.elevation[0];
dest_alt =
@@ -381,7 +381,7 @@ void PlotPropPath(struct site source, struct site destination,
for (x = 2, block = 0; (x < y && block == 0);
x++) {
distance = 5280.0 * path.distance[x];
distance = FEET_PER_MILE * path.distance[x];
test_alt =
four_thirds_earth +
@@ -892,7 +892,7 @@ void PlotPath(struct site source, struct site destination, char mask_value)
tested and found to be free of obstructions. */
if ((GetMask(path.lat[y], path.lon[y]) & mask_value) == 0) {
distance = 5280.0 * path.distance[y];
distance = FEET_PER_MILE * path.distance[y];
tx_alt = earthradius + source.alt + path.elevation[0];
rx_alt =
earthradius + destination.alt + path.elevation[y];
@@ -906,7 +906,7 @@ void PlotPath(struct site source, struct site destination, char mask_value)
for (x = y, block = 0; x >= 0 && block == 0; x--) {
distance =
5280.0 * (path.distance[y] -
FEET_PER_MILE * (path.distance[y] -
path.distance[x]);
test_alt =
earthradius + (path.elevation[x] ==