From ff0286325a3dd1f4fe7e29e78341b9bd63e1725c Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 14 Jul 2017 21:15:32 +0200 Subject: blind-matrix-{rotate,shear}: add -d MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- man/blind-matrix-rotate.1 | 14 +++++++++++++- man/blind-matrix-shear.1 | 5 ++++- 2 files changed, 17 insertions(+), 2 deletions(-) (limited to 'man') diff --git a/man/blind-matrix-rotate.1 b/man/blind-matrix-rotate.1 index 31ec330..3c82a3b 100644 --- a/man/blind-matrix-rotate.1 +++ b/man/blind-matrix-rotate.1 @@ -3,7 +3,7 @@ blind-matrix-rotate - Create an affine 2D-transformation matrix for rotation .SH SYNOPSIS .B blind-matrix-rotate -[-c] +[-cd] .SH DESCRIPTION .B blind-matrix-rotate creates an affine 2D-transformation matrix for @@ -28,9 +28,21 @@ Create different matrices for each channel. Use values from each channel in stdin to create matrices whose values are stored in the same channels in stdout. +.TP +.B -d +Input angles in degrees rather than radians. .SH NOTES The image is rotated anti-clockwise if the Y-axis grows upwards rather than downwards. +.P +Due to truncation error, when rotating a multiple +of 90 degrees, it is preferable to use +.B -d +with lets +.B blind-matrix-rotate +eliminate the error. If this is not done, +.BR blind-invert-matrix (1) +may return odd results. .SH SEE ALSO .BR blind (7), .BR blind-from-text (1), diff --git a/man/blind-matrix-shear.1 b/man/blind-matrix-shear.1 index 56d856d..a524cc5 100644 --- a/man/blind-matrix-shear.1 +++ b/man/blind-matrix-shear.1 @@ -3,7 +3,7 @@ blind-matrix-shear - Create an affine 2D-transformation matrix for shearing .SH SYNOPSIS .B blind-matrix-shear -[-ac] +[-a [-d]] [-c] .SH DESCRIPTION .B blind-matrix-shear creates an affine 2D-transformation matrix for @@ -37,6 +37,9 @@ Create different matrices for each channel. Use values from each channel in stdin to create matrices whose values are stored in the same channels in stdout. +.TP +.B -d +Input angles in degrees rather than radians. .SH NOTES The description assumes the Y-axis grows downwards. .P -- cgit v1.2.3-70-g09d2