diff options
Diffstat (limited to 'src/blind-cone-gradient.c')
| -rw-r--r-- | src/blind-cone-gradient.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/src/blind-cone-gradient.c b/src/blind-cone-gradient.c index 63e6566..23906e0 100644 --- a/src/blind-cone-gradient.c +++ b/src/blind-cone-gradient.c @@ -44,18 +44,22 @@ static int with_multiplier = 0; y = (TYPE)iy - y1;\ for (ix = 0; ix < width; ix++) {\ x = (TYPE)ix - x1;\ - v = atan2(y, x);\ - v -= u;\ - v += 2 * (TYPE)M_PI;\ - v = mod(v, 2 * (TYPE)M_PI);\ - v /= 2 * (TYPE)M_PI;\ - if (anticlockwise)\ - v = 1 - v;\ - v *= m;\ - if (symmetric) {\ - v = mod(2 * v, (TYPE)2);\ - if (v > 1)\ - v = 2 - v;\ + if (!x && !y) {\ + v = 0.5;\ + } else {\ + v = atan2(y, x);\ + v -= u;\ + v += 2 * (TYPE)M_PI;\ + v = mod(v, 2 * (TYPE)M_PI);\ + v /= 2 * (TYPE)M_PI;\ + if (anticlockwise)\ + v = 1 - v;\ + v *= m;\ + if (symmetric) {\ + v = mod(2 * v, (TYPE)2);\ + if (v > 1)\ + v = 2 - v;\ + }\ }\ buf[ptr][0] = buf[ptr][1] = buf[ptr][2] = buf[ptr][3] = v;\ if (++ptr == ELEMENTSOF(buf)) {\ |