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/*
* fastMath.c
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Created on: 07.09.2011
* Author: Roland Domke
* Copyright: 2011 Roland Domke
*/
//achtung wird im RAM abgelegt!
float sintable[91] = {
0
,0.017452406
,0.034899497
,0.052335956
,0.069756474
,0.087155743
,0.104528463
,0.121869343
,0.139173101
,0.156434465
,0.173648178
,0.190808995
,0.207911691
,0.224951054
,0.241921896
,0.258819045
,0.275637356
,0.292371705
,0.309016994
,0.325568154
,0.342020143
,0.35836795
,0.374606593
,0.390731128
,0.406736643
,0.422618262
,0.438371147
,0.4539905
,0.469471563
,0.48480962
,0.5
,0.515038075
,0.529919264
,0.544639035
,0.559192903
,0.573576436
,0.587785252
,0.601815023
,0.615661475
,0.629320391
,0.64278761
,0.656059029
,0.669130606
,0.68199836
,0.69465837
,0.707106781
,0.7193398
,0.731353702
,0.743144825
,0.75470958
,0.766044443
,0.777145961
,0.788010754
,0.79863551
,0.809016994
,0.819152044
,0.829037573
,0.838670568
,0.848048096
,0.857167301
,0.866025404
,0.874619707
,0.882947593
,0.891006524
,0.898794046
,0.906307787
,0.913545458
,0.920504853
,0.927183855
,0.933580426
,0.939692621
,0.945518576
,0.951056516
,0.956304756
,0.961261696
,0.965925826
,0.970295726
,0.974370065
,0.978147601
,0.981627183
,0.984807753
,0.987688341
,0.990268069
,0.992546152
,0.994521895
,0.996194698
,0.99756405
,0.998629535
,0.999390827
,0.999847695
,1
};
float getSin(unsigned int degree) {
degree = degree % 360;
if(degree <= 90) {
return sintable[degree];
}
else if(degree <= 180) {
return sintable[180-degree];
}
else if(degree <= 270) {
return sintable[degree-180]*(-1.0);
}
else {
return sintable[360-degree]*(-1.0);
}
}
double getCos(unsigned int degree) {
degree = degree % 360;
return getSin(degree+90);
}
/* signum function */
char sgn(char x) {
return (x > 0) ? 1 : (x < 0) ? -1 : 0;
}
unsigned char max(unsigned char a, unsigned char b) {
return (a<b) ? b : a;
}
unsigned char min (unsigned char a, unsigned char b) {
return (a<b) ? a : b;
}
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