blind

suckless command-line video editing utility
git clone git://git.suckless.org/blind
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commit 484d84596ef059463d905f07c65672b92a38a28c
parent 862b01e204b651cb20fd7aae9caad470e86a11ca
Author: Mattias Andrée <maandree@kth.se>
Date:   Tue, 11 Jul 2017 19:18:56 +0200

blind-spiral-gradient: set the value of the singularity to 0

Signed-off-by: Mattias Andrée <maandree@kth.se>

Diffstat:
src/blind-spiral-gradient.c | 16++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/src/blind-spiral-gradient.c b/src/blind-spiral-gradient.c @@ -66,12 +66,16 @@ static int with_vector; y = (TYPE)iy - y1;\ for (ix = 0; ix < width; ix++) {\ x = (TYPE)ix - x1;\ - v = atan2(y, x);\ - if (anticlockwise)\ - v = 1 - v;\ - v -= u;\ - v += 4 * (TYPE)M_PI;\ - v = mod(v, 2 * (TYPE)M_PI);\ + if (!x && !y) {\ + v = 0;\ + } else {\ + v = atan2(y, x);\ + if (anticlockwise)\ + v = 1 - v;\ + v -= u;\ + v += 4 * (TYPE)M_PI;\ + v = mod(v, 2 * (TYPE)M_PI);\ + }\ if (!with_vector) {\ r = sqrt(x * x + y * y);\ } else {\