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| author | Mattias Andrée <maandree@kth.se> | 2017-07-03 16:35:20 +0200 |
|---|---|---|
| committer | Mattias Andrée <maandree@kth.se> | 2017-07-03 16:35:20 +0200 |
| commit | d7d10a866df51c219dc06589ab4c0c1704b90bbb (patch) | |
| tree | 1a7feca92378f9114581ad0c6e04d503e9127dbd /src | |
| parent | Missed to remove todo from readme (diff) | |
| download | blind-d7d10a866df51c219dc06589ab4c0c1704b90bbb.tar.gz blind-d7d10a866df51c219dc06589ab4c0c1704b90bbb.tar.bz2 blind-d7d10a866df51c219dc06589ab4c0c1704b90bbb.tar.xz | |
blind-cone-gradient: make the singularity's value 0.5
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'src')
| -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)) {\ |