40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
|
/*
|
||
|
* A library for avr microcontrollers to control WS2812 leds
|
||
|
*
|
||
|
* Copyright (C) 2016 Markus Schmidl
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify it under the terms of the
|
||
|
* GNU General Public License as published by the Free Software Foundation;
|
||
|
* either version 2 of the License, or (at your option) any later version.
|
||
|
*
|
||
|
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
|
||
|
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||
|
* See the GNU General Public License for more details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License along with this program;
|
||
|
* if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* clamps x to interval [0,1]
|
||
|
*/
|
||
|
#define clamp_to_0_1(x) (x>0?(x<1?x:1):0)
|
||
|
/**
|
||
|
* clamps x to interval [0,255]
|
||
|
*/
|
||
|
#define clamp_to_0_255(x) (x>0?(x<255?x:255):0)
|
||
|
/**
|
||
|
* function
|
||
|
*
|
||
|
* 360 - |x|
|
||
|
*/
|
||
|
#define _360_min_fabs(x) (360.0 - fabs(x))
|
||
|
/**
|
||
|
* function
|
||
|
*
|
||
|
* x
|
||
|
* - -----
|
||
|
* |x|
|
||
|
*/
|
||
|
#define _change_pos_neg(x) (-1.0 * x / fabs(x))
|