mirror of https://github.com/dirtbags/tanks.git
26 lines
643 B
C
26 lines
643 B
C
#ifndef __TRIG_H__
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#define __TRIG_H__
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/** Trigonometry in degrees
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*
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* It's just a library to do discrete(-ish) trig, using degrees. It
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* uses a lookup table to make sin, cos, and tan really fast.
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* Everything is as slow as normal :)
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*/
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/* Just to make it clear what scale these functions are dealing with */
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#define PI 3.14159265358979323846
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#define rad2deg(rad) ((int)(rad * 180 / PI))
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#define deg2rad(deg) ((float)(deg * PI / 180))
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float trig_cos(int angle);
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float trig_sin(int angle);
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float trig_atan(int angle);
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int trig_acos(float angle);
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int trig_asin(float angle);
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int trig_atan2(float y, float x);
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#endif /* __TRIG_H__ */
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