/usr/share/k3d/shaders/k3d_constants.h is in k3d-data 0.8.0.3-3build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | /* k3d_constants.h
* various constants or "magic" numbers
* see http://en.wikipedia.org/wiki/Mathematical_constant
* 2006-03-13 dan@3-e.net
*
* need to check the max number of digits.
* need to make case of names uniform.
* Some of these may be in a Math.h else where...
*/
#define M_E 2.7182818284590452354 /* e, euler's number */
#define Euler 0.57721566490153286060651209008240243 /* Y, Euler-Mascheroni constant */
#define GoldenRatio 1.61803398874989484820458683436563811 /* the Golden Ratio */
#define Pi 3.14159265358979323846264338327950288 /* Pi , Archimedes' constant or Ludolph's number */
#define TWOPI (2*Pi)
#define VERY_SMALL 0.0001
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