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division-by-zero fix from Csaba Halasz

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This commit is contained in:
Tim Moore 2009-01-26 00:47:09 +01:00
parent d509343067
commit 194527a59a
1 changed files with 11 additions and 7 deletions
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4
src/Environment/environment_ctrl.cxx
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@ -436,6 +436,9 @@ FGMetarEnvironmentCtrl::update_env_config ()
// factor by the maximum wind change. // factor by the maximum wind change.
double x = fabs(current[0] - metar[0]); double x = fabs(current[0] - metar[0]);
double y = fabs(current[1] - metar[1]); double y = fabs(current[1] - metar[1]);
// only interpolate if we have a difference
if (x + y > 0) {
double dx = x / (x + y); double dx = x / (x + y);
double dy = 1 - dx; double dy = 1 - dx;
@ -445,6 +448,7 @@ FGMetarEnvironmentCtrl::update_env_config ()
// Interpolate each component separately. // Interpolate each component separately.
current[0] = interpolate_val(current[0], metar[0], maxdx); current[0] = interpolate_val(current[0], metar[0], maxdx);
current[1] = interpolate_val(current[1], metar[1], maxdy); current[1] = interpolate_val(current[1], metar[1], maxdy);
}
// Now convert back to polar coordinates. // Now convert back to polar coordinates.
if ((current[0] == 0.0) && (current[1] == 0.0)) { if ((current[0] == 0.0) && (current[1] == 0.0)) {