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diff --git a/man/man3/qball.html b/man/man3/qball.html deleted file mode 100644 index b1403336..00000000 --- a/man/man3/qball.html +++ /dev/null @@ -1,111 +0,0 @@ -<head> -<title>qball(3) - Plan 9 from User Space</title> -<meta content="text/html; charset=utf-8" http-equiv=Content-Type> -</head> -<body bgcolor=#ffffff> -<table border=0 cellpadding=0 cellspacing=0 width=100%> -<tr height=10><td> -<tr><td width=20><td> -<tr><td width=20><td><b>QBALL(3)</b><td align=right><b>QBALL(3)</b> -<tr><td width=20><td colspan=2> - <br> -<p><font size=+1><b>NAME </b></font><br> - -<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> - - qball – 3-d rotation controller<br> - -</table> -<p><font size=+1><b>SYNOPSIS </b></font><br> - -<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> - - -<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> - - <tt><font size=+1>#include <draw.h> - <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> - </font></tt> - <tt><font size=+1>#include <geometry.h> - <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> - </font></tt> - <tt><font size=+1>void qball(Rectangle r, Mouse *mousep,<br> - - <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> - - Quaternion *orientation,<br> - void (*redraw)(void), Quaternion *ap)<br> - - </table> - </font></tt> -</table> -<p><font size=+1><b>DESCRIPTION </b></font><br> - -<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> - - <i>Qball</i> is an interactive controller that allows arbitrary 3-space - rotations to be specified with the mouse. Imagine a sphere with - its center at the midpoint of rectangle <i>r</i>, and diameter the smaller - of <i>r</i>’s dimensions. Dragging from one point on the sphere to another - specifies the endpoints of a great-circle arc. (Mouse - points outside the sphere are projected to the nearest point on - the sphere.) The axis of rotation is normal to the plane of the - arc, and the angle of rotation is twice the angle of the arc. - - <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> - - Argument <i>mousep</i> is a pointer to the mouse event that triggered - the interaction. It should have some button set. <i>Qball</i> will read - more events into <i>mousep</i>, and return when no buttons are down. - - <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> - - While <i>qball</i> is reading mouse events, it calls out to the caller-supplied - routine <i>redraw</i>, which is expected to update the screen to reflect - the changing orientation. Argument <i>orientation</i> is the orientation - that <i>redraw</i> should examine, represented as a unit Quaternion (see - <i>quaternion(9.2)).</i> The caller may set it to any - orientation. It will be updated before each call to <i>redraw</i> (and - on return) by multiplying by the rotation specified with the mouse. - - <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table> - - It is possible to restrict <i>qball’s</i> attention to rotations about - a particular axis. If <i>ap</i> is null, the rotation is unconstrained. - Otherwise, the rotation will be about the same axis as <i>*ap</i>. This - is accomplished by projecting points on the sphere to the nearest - point also on the plane through the sphere’s center and normal - to - the axis.<br> - -</table> -<p><font size=+1><b>SOURCE </b></font><br> - -<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> - - <tt><font size=+1>/usr/local/plan9/src/libgeometry/qball.c<br> - </font></tt> -</table> -<p><font size=+1><b>SEE ALSO </b></font><br> - -<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td> - - <a href="../man3/quaternion.html"><i>quaternion</i>(3)</a><br> - Ken Shoemake, “Animating Rotation with Quaternion Curves”, <i>SIGGRAPH - ’85 Conference Proceedings.<br> - </i> -</table> - -<td width=20> -<tr height=20><td> -</table> -<!-- TRAILER --> -<table border=0 cellpadding=0 cellspacing=0 width=100%> -<tr height=15><td width=10><td><td width=10> -<tr><td><td> -<center> -<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a> -</center> -</table> -<!-- TRAILER --> -</body></html> |