blind-cone-gradient.1 (1693B)
1 .TH BLIND-CONE-GRADIENT 1 blind 2 .SH NAME 3 blind-cone-gradient - Generate a video with a cone gradient 4 .SH SYNOPSIS 5 .B blind-cone-gradient 6 [-a | -s] 7 -w 8 .I width 9 -h 10 .I height 11 .SH DESCRIPTION 12 .B blind-cone-gradient 13 prints a video with a cone gradient to stdout, 14 parameters for each from is read from each frame 15 in stdin. The gradient is stored in all channels 16 of the video. 17 .P 18 The video in stdin must contain exactly 2 or 3 19 pixels per frame. The first pixel shall point to 20 the beginning of the gradient (where the value is 21 0) and the second pixel shall point to the end of 22 the gradient (where the value is 1). In these 23 pixels, the value of the first channel specifies 24 the X-position and the value of the second 25 channel specifies Y-position, the other channels 26 are ignored. 27 .P 28 If there is a third pixel, in frames in stdin, all 29 values in the gradient are multipled by the value 30 in the second channel (the Y channel) of the third 31 pixel in stdin; the rest of the channels in this 32 pixel is ignored. 33 .SH OPTIONS 34 .TP 35 .B -a 36 Make the gradient increase anticlockwise 37 instead of clockwise. 38 .TP 39 .B -s 40 Make the gradient increase symmetrically 41 instead of clockwise. 42 .TP 43 .BR -w " "\fIwidth\fP 44 The width of the video, in pixels. 45 .TP 46 .BR -h " "\fIheight\fP 47 The height of the video, in pixels. 48 .SH SEE ALSO 49 .BR blind (7), 50 .BR blind-from-text (7), 51 .BR blind-linear-gradient (1), 52 .BR blind-radial-gradient (1), 53 .BR blind-spiral-gradient (1), 54 .BR blind-square-gradient (1), 55 .BR blind-double-sine-wave (1), 56 .BR blind-round-wave (1), 57 .BR blind-sawtooth-wave (1), 58 .BR blind-sinc-wave (1), 59 .BR blind-sine-wave (1), 60 .BR blind-triangular-wave (1), 61 .BR blind-spectrum (1) 62 .SH AUTHORS 63 Mattias Andrée 64 .RI < maandree@kth.se >