X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=hacks%2Fattraction.man;h=5e19f757e216f5f7d026309fc891473d7c2626ea;hb=3f438031d610c7e15fd33876a879b97e290e05fb;hp=12c75069c5064196c1aa4fb876d5b3e5d98fb74d;hpb=65740e2a8dea3d6309ae6e8914a0fb79e993ada8;p=xscreensaver diff --git a/hacks/attraction.man b/hacks/attraction.man old mode 100755 new mode 100644 index 12c75069..5e19f757 --- a/hacks/attraction.man +++ b/hacks/attraction.man @@ -1,9 +1,31 @@ -.TH XScreenSaver 1 "22-mar-93" "X Version 11" +.de EX \"Begin example +.ne 5 +.if n .sp 1 +.if t .sp .5 +.nf +.in +.5i +.. +.de EE +.fi +.in -.5i +.if n .sp 1 +.if t .sp .5 +.. +.TH XScreenSaver 1 "14-Jun-97" "X Version 11" .SH NAME attraction - interactions of opposing forces .SH SYNOPSIS .B attraction -[\-display \fIhost:display.screen\fP] [\-foreground \fIcolor\fP] [\-background \fIcolor\fP] [\-window] [\-root] [\-mono] [\-points \fIint\fP] [\-threshold \fIint\fP] [\-mode balls | lines | polygons | splines | filled-splines | tails ] [\-color-mode cycle | random] [\-size \fIint\fP] [\-segments \fIint\fP] [\-delay \fIusecs\fP] [\-color-shift \fIdegrees\fP] [\-radius \fIint\fP] [\-vx \fIint\fP] [\-vy \fIint\fP] [\-glow] [\-noglow] [\-orbit] +[\-display \fIhost:display.screen\fP] [\-foreground \fIcolor\fP] +[\-background \fIcolor\fP] [\-window] [\-root] [\-mono] [\-install] +[\-visual \fIvisual\fP] [\-points \fIint\fP] [\-threshold \fIint\fP] +[\-mode balls | lines | polygons | splines | filled-splines | tails ] +[\-size \fIint\fP] [\-segments \fIint\fP] [\-delay \fIusecs\fP] +[\-color-shift \fIint\fP] [\-radius \fIint\fP] +[\-vx \fIint\fP] [\-vy \fIint\fP] [\-glow] [\-noglow] +[\-orbit] [\-viscosity \fIfloat\fP] [\-mouse] [\-no-mouse] [\-mouse-size] +[\-walls] [\-nowalls] [\-maxspeed] [\-nomaxspeed] +[\-correct-bounce] [\-fast-bounce] .SH DESCRIPTION The \fIattraction\fP program has several visually different modes of operation, all of which are based on the interactions of a set of control @@ -23,6 +45,13 @@ Draw on the root window. .B \-mono If on a color display, pretend we're on a monochrome display. .TP 8 +.B \-install +Install a private colormap for the window. +.TP 8 +.B \-visual \fIvisual\fP +Specify which visual to use. Legal values are the name of a visual class, +or the id number (decimal or hex) of a specific visual. +.TP 8 .B \-points integer How many control points should be used, or 0 to select the number randomly. Default 0. Between 3 and 15 works best. @@ -51,9 +80,6 @@ In \fItails\fP mode, the path which each particle follows is indicated by a worm-like trail, whose length is controlled by the \fIsegments\fP parameter. .TP 8 -.B \-color-mode cycle | random -Whether colors should cycle through the spectrum, or be picked randomly. -.TP 8 .B \-size integer The size of the balls in pixels, or 0, meaning to select the sizes randomly (the default.) If this is specified, then all balls will be @@ -70,10 +96,11 @@ is only useful in color.) How much of a delay should be introduced between steps of the animation. Default 10000, or about 0.01 seconds. .TP 8 -.B \-color-shift degrees +.B \-color-shift int If on a color display, the color of the line segments or polygons will -cycle through the spectrum. This specifies how far the hue of each segment -should be from the next, in degrees on the HSV wheel. Default 3. +cycle through the color map. This specifies how many lines will be drawn +before a new color is chosen. (When a small number of colors are available, +increasing this value will yield smoother transitions.) Default 3. This has no effect in \fIballs\fP mode. .TP 8 .B \-radius @@ -107,10 +134,69 @@ to decay. .B \-vmult float In orbit mode, the initial velocity of the balls is multiplied by this; a number less than 1 will make the balls pull closer together, and a larger -number will make them move apart. The default is 1, meaning stability. -.SH ENVIRONMENT -.PP +number will make them move apart. The default is 0.9, meaning a slight +inward pull. .TP 8 +.B \-viscosity float +This sets the viscosity of the hypothetical fluid through which the control +points move; the default is 1, meaning no resistance. Values higher than 1 +aren't interesting; lower values cause less motion. + +One interesting thing to try is +.EX +attraction -viscosity 0.8 -points 75 \\ + -mouse -geometry =500x500 +.EE +Give it a few seconds to settle down into a stable clump, and then move +the mouse through it to make "waves". +.TP 8 +.B \-mouse +This will cause the mouse to be considered a control point; it will not be +drawn, but it will influence the other points, so you can wave the mouse +and influence the images being created. +.TP 8 +.B \-no-mouse +Turns off \fB\-mouse\fP. +.TP 8 +.B \-mouse-size integer +In \fB\-mouse\fP mode, this sets the mass of the mouse (analogously to the +\fB\-size\fP parameter.) +.TP 8 +.B \-nowalls +This will cause the balls to continue on past the edge of the +screen or window. They will still be kept track of and can come back. +.TP 8 +.B \-walls +This will cause the balls to bounce when they get +to the edge of the screen or window. This is the default behavior. +.TP 8 +.B \-maxspeed +Imposes a maximum speed (default). If a ball ends up going faster than +this, it will be treated as though there were .9 viscosity until it is +under the limit. This stops the balls from continually accelerating (which +they have a tendency to do), but also causes balls moving very fast to +tend to clump in the lower right corner. +.TP 8 +.B \-nomaxspeed +If this is specified, no maximum speed is set for the balls. +.TP 8 +.B \-fast-bounce +Uses the old, simple bouncing algorithm (default). This simply moves any +ball that is out of bounds back to a wall and reverses its velocity. +This works fine for most cases, but under some circumstances, the +simplification can lead to annoying effects. +.TP 8 +.B \-correct-bounce +Uses a more intelligent bouncing algorithm. This method actually reflects +the balls off the walls until they are within bounds. This can be slow +if balls are bouncing a whole lot, perhaps because of -nomaxspeed. +.TP 8 +.B \-graphmode none | x | y | both | speed +For "x", "y", and "both", displays the given velocities of each ball as a +bar graph in the same window as the balls. For "speed", displays the total +speed of each ball. Default is "none". +.BR +.SH ENVIRONMENT .B DISPLAY to get the default host and display number. .TP 8 @@ -121,12 +207,17 @@ stored in the RESOURCE_MANAGER property. .BR X (1), .BR xscreensaver (1) .SH COPYRIGHT -Copyright \(co 1992, 1993 by Jamie Zawinski. Permission to use, copy, modify, -distribute, and sell this software and its documentation for any purpose is -hereby granted without fee, provided that the above copyright notice appear -in all copies and that both that copyright notice and this permission notice -appear in supporting documentation. No representations are made about the -suitability of this software for any purpose. It is provided "as is" without -express or implied warranty. +Copyright \(co 1992, 1993, 1997 by Jamie Zawinski. Permission to use, copy, +modify, distribute, and sell this software and its documentation for any +purpose is hereby granted without fee, provided that the above copyright +notice appear in all copies and that both that copyright notice and this +permission notice appear in supporting documentation. No representations are +made about the suitability of this software for any purpose. It is provided +"as is" without express or implied warranty. .SH AUTHOR -Jamie Zawinski , 13-aug-92. +Jamie Zawinski , 13-aug-92. + +Viscosity and mouse support by Philip Edward Cutone, III. + +Walls, speed limit options, new bouncing, graphs, and tail mode fix by +Matthew Strait. 31 March 2001