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blind-spiral-gradient: add -s - blind - suckless command-line video editing uti… |
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git clone git://git.suckless.org/blind |
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Log |
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Files |
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Refs |
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README |
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LICENSE |
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--- |
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commit d91c5e12a53a33d50a5a0cef41255ae5b39bd55e |
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parent e2f2b65b49d1a47b1a749c5de4b0efcfc7ebb5bc |
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Author: Mattias Andrée <[email protected]> |
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Date: Tue, 11 Jul 2017 20:26:04 +0200 |
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blind-spiral-gradient: add -s |
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Signed-off-by: Mattias Andrée <[email protected]> |
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Diffstat: |
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M man/blind-spiral-gradient.1 | 12 ++++++++++++ |
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M src/blind-spiral-gradient.c | 10 +++++++++- |
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2 files changed, 21 insertions(+), 1 deletion(-) |
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--- |
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diff --git a/man/blind-spiral-gradient.1 b/man/blind-spiral-gradient.1 |
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@@ -3,6 +3,8 @@ |
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blind-spiral-gradient - Generate a video with a spiral gradient |
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.SH SYNOPSIS |
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.B blind-spiral-gradient |
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+[-s |
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+.IR spirals ] |
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[-al] |
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-w |
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.I width |
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@@ -100,6 +102,16 @@ Create a spiral that gones anticlockwise. |
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.B -l |
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Create a logarithmic spiral. |
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.TP |
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+.BR -s " "\fIspirals\fP |
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+Draw |
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+.I spirals |
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+spirals |
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+going out the specified centre instead of |
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+just one spiral. The spirals are uniformly |
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+distributed. |
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+.I spirals |
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+can be any non-zero real number. |
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+.TP |
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.BR -w " "\fIwidth\fP |
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The width of the video, in pixels. |
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.TP |
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diff --git a/src/blind-spiral-gradient.c b/src/blind-spiral-gradient.c |
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@@ -1,10 +1,11 @@ |
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/* See LICENSE file for copyright and license details. */ |
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#include "common.h" |
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-USAGE("[-al] -w width -h height") |
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+USAGE("[-s spirals] [-al] -w width -h height") |
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static int anticlockwise = 0; |
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static int logarithmic = 0; |
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+static double spirals = 1; |
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static size_t width = 0; |
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static size_t height = 0; |
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static int with_params; |
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@@ -58,6 +59,7 @@ static int with_vector; |
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y2 -= y1;\ |
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u = atan2(y2, x2);\ |
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b = sqrt(x2 * x2 + y2 * y2);\ |
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+ b *= spirals;\ |
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if (logarithmic)\ |
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b = log(b);\ |
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b /= pow(2 * (TYPE)M_PI, e);\ |
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@@ -96,6 +98,7 @@ static int with_vector; |
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r = pow(r / b, ep);\ |
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r = (r - v) / (2 * (TYPE)M_PI)… |
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}\ |
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+ r = mod(r, 1 / (TYPE)spirals) * (TYPE)… |
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buf[ptr][0] = buf[ptr][1] = buf[ptr][2… |
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if (++ptr == ELEMENTSOF(buf)) {\ |
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ewriteall(STDOUT_FILENO, buf, … |
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@@ -123,6 +126,11 @@ main(int argc, char *argv[]) |
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case 'l': |
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logarithmic = 1; |
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break; |
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+ case 's': |
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+ spirals = etolf_flag('s', UARGF()); |
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+ if (!spirals) |
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+ eprintf("the value of -s must not be 0"); |
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+ break; |
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case 'w': |
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width = etozu_flag('w', UARGF(), 1, SIZE_MAX); |
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break; |
