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| author | Filippo Argiolas <filippo.argiolas@gmail.com> | 2010-08-03 10:08:34 +0200 |
|---|---|---|
| committer | Thiago Santos <thiago.sousa.santos@collabora.co.uk> | 2010-08-04 20:09:09 -0300 |
| commit | c921067208414c47a0c961e604b4d777f2d40b34 (patch) | |
| tree | 939cf08f7deb7246f29434446dd2a1a0c659d9c4 /gst/geometrictransform/gsttwirl.c | |
| parent | 770194a8fcc638924b29e78e9f24c4c7e7ef4b83 (diff) | |
| download | gstreamer-plugins-bad-c921067208414c47a0c961e604b4d777f2d40b34.tar.gz | |
geometrictransform: make ciclegt "radius" property relative
Make the "radius" property of CircleGeometricTransform relative.
This is more coherent with the way [x,y]-center properties are handled
and allow to set a radius without knowing the video size.
Radius is defined with respect to the circle circumscribed about the
video rectangle so that a point in the center has radius 0.0 and one in
a vertex has radius 1.0.
Note that this is not a regression from the previous absolute way of
defining the radius as a user who knows the video size can easily
calculate the relative radius and set that.
https://bugzilla.gnome.org/show_bug.cgi?id=625959
Diffstat (limited to 'gst/geometrictransform/gsttwirl.c')
| -rw-r--r-- | gst/geometrictransform/gsttwirl.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gst/geometrictransform/gsttwirl.c b/gst/geometrictransform/gsttwirl.c index 51302d413..8d31d8ee5 100644 --- a/gst/geometrictransform/gsttwirl.c +++ b/gst/geometrictransform/gsttwirl.c @@ -155,7 +155,8 @@ twirl_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x, *in_y = y; } else { gdouble d = sqrt (distance); - gdouble a = atan2 (dy, dx) + twirl->angle * (cgt->radius - d) / cgt->radius; + gdouble a = atan2 (dy, + dx) + twirl->angle * (cgt->precalc_radius - d) / cgt->precalc_radius; *in_x = cgt->precalc_x_center + d * cos (a); *in_y = cgt->precalc_y_center + d * sin (a); |