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blind-spiral-gradient: set the value of the singularity to 0 - blind - suckless… |
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git clone git://git.suckless.org/blind |
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--- |
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commit 484d84596ef059463d905f07c65672b92a38a28c |
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parent 862b01e204b651cb20fd7aae9caad470e86a11ca |
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Author: Mattias Andrée <[email protected]> |
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Date: Tue, 11 Jul 2017 19:18:56 +0200 |
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blind-spiral-gradient: set the value of the singularity to 0 |
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Signed-off-by: Mattias Andrée <[email protected]> |
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Diffstat: |
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M src/blind-spiral-gradient.c | 16 ++++++++++------ |
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1 file changed, 10 insertions(+), 6 deletions(-) |
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--- |
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diff --git a/src/blind-spiral-gradient.c b/src/blind-spiral-gradient.c |
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@@ -66,12 +66,16 @@ static int with_vector; |
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y = (TYPE)iy - y1;\ |
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for (ix = 0; ix < width; ix++) {\ |
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x = (TYPE)ix - x1;\ |
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- v = atan2(y, x);\ |
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- if (anticlockwise)\ |
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- v = 1 - v;\ |
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- v -= u;\ |
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- v += 4 * (TYPE)M_PI;\ |
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- v = mod(v, 2 * (TYPE)M_PI);\ |
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+ if (!x && !y) {\ |
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+ v = 0;\ |
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+ } else {\ |
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+ v = atan2(y, x);\ |
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+ if (anticlockwise)\ |
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+ v = 1 - v;\ |
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+ v -= u;\ |
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+ v += 4 * (TYPE)M_PI;\ |
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+ v = mod(v, 2 * (TYPE)M_PI);\ |
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+ }\ |
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if (!with_vector) {\ |
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r = sqrt(x * x + y * y);\ |
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} else {\ |
