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Refactor a section of icvRotatingCalipers to work around a GCC bug

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https://bugs.launchpad.net/ubuntu/+source/gcc-4.9/+bug/1474304
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Roman Donchenko 2015-07-14 13:23:37 +03:00 committed by Dikay900
parent 190d00ea3e
commit e1be6d0888
1 changed files with 16 additions and 12 deletions
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28
modules/imgproc/src/rotcalipers.cpp
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@ -184,24 +184,28 @@ static void rotatingCalipers( const Point2f* points, int n, int mode, float* out
/* compute cosine of angle between calipers side and polygon edge */
/* dp - dot product */
float dp0 = base_a * vect[seq[0]].x + base_b * vect[seq[0]].y;
float dp1 = -base_b * vect[seq[1]].x + base_a * vect[seq[1]].y;
float dp2 = -base_a * vect[seq[2]].x - base_b * vect[seq[2]].y;
float dp3 = base_b * vect[seq[3]].x - base_a * vect[seq[3]].y;
float dp[4] = {
+base_a * vect[seq[0]].x + base_b * vect[seq[0]].y,
-base_b * vect[seq[1]].x + base_a * vect[seq[1]].y,
-base_a * vect[seq[2]].x - base_b * vect[seq[2]].y,
+base_b * vect[seq[3]].x - base_a * vect[seq[3]].y,
};
float cosalpha = dp0 * inv_vect_length[seq[0]];
float maxcos = cosalpha;
float maxcos = dp[0] * inv_vect_length[seq[0]];
/* number of calipers edges, that has minimal angle with edge */
int main_element = 0;
/* choose minimal angle */
cosalpha = dp1 * inv_vect_length[seq[1]];
maxcos = (cosalpha > maxcos) ? (main_element = 1, cosalpha) : maxcos;
cosalpha = dp2 * inv_vect_length[seq[2]];
maxcos = (cosalpha > maxcos) ? (main_element = 2, cosalpha) : maxcos;
cosalpha = dp3 * inv_vect_length[seq[3]];
maxcos = (cosalpha > maxcos) ? (main_element = 3, cosalpha) : maxcos;
for ( i = 1; i < 4; ++i )
{
float cosalpha = dp[i] * inv_vect_length[seq[i]];
if (cosalpha > maxcos)
{
main_element = i;
maxcos = cosalpha;
}
}
/*rotate calipers*/
{