From 88608ff1d844d36b824e33aaa90cf25f1e028b1b Mon Sep 17 00:00:00 2001 From: bnewbold Date: Fri, 6 May 2016 14:00:19 -0400 Subject: pull in original xscreensaver code --- original/rotator.h | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 original/rotator.h (limited to 'original/rotator.h') diff --git a/original/rotator.h b/original/rotator.h new file mode 100644 index 0000000..b3f36f6 --- /dev/null +++ b/original/rotator.h @@ -0,0 +1,60 @@ +/* xscreensaver, Copyright (c) 1998-2002 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. + */ + +#ifndef __ROTATOR_H__ +#define __ROTATOR_H__ + +typedef struct rotator rotator; + +/* Returns a rotator object, which encapsulates rotation and motion state. + + spin_[xyz]_speed indicates the relative speed of rotation. + Specify 0 if you don't want any rotation around that axis. + + spin_accel specifies a scaling factor for the acceleration that is + randomly applied to spin: if you want the speed to change faster, + make this > 1. + + wander_speed indicates the relative speed through space. + + If randomize_initial_state_p is true, then the initial position and + rotation will be randomized (even if the spin speeds are 0.) If it + is false, then all values will be initially zeroed. + */ +extern rotator *make_rotator (double spin_x_speed, + double spin_y_speed, + double spin_z_speed, + double spin_accel, + double wander_speed, + int randomize_initial_state_p); + +/* Rotates one step, and returns the new rotation values. + x, y, and z range from 0.0-1.0, the fraction through the circle + (*not* radians or degrees!) + If `update_p' is non-zero, then (maybe) rotate first. + */ +extern void get_rotation (rotator *rot, + double *x_ret, double *y_ret, double *z_ret, + int update_p); + +/* Moves one step, and returns the new position values. + x, y, and z range from 0.0-1.0, the fraction through space: + scale those values as needed. + If `update_p' is non-zero, then (maybe) move first. + */ +extern void get_position (rotator *rot, + double *x_ret, double *y_ret, double *z_ret, + int update_p); + +/* Destroys and frees a `rotator' object. */ +extern void free_rotator (rotator *r); + +#endif /* __ROTATOR_H__ */ -- cgit v1.2.3