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/*
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** Author: Christian Reetz ([email protected])
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*/
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#ifndef __G3SPHERE_H
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#define __G3SPHERE_H
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "gbasic.h"
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#include "g3vector.h"
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/**
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*** Functions for doing some geometry on spheres.
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*** Subscripts in names indicates: "cc" cartesian coords,"sph" spherical
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*** coords, normalization on cart. coords ist done, "chk" checks are made.
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*** If the function name contains no subsript
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*** no checks are made and normalized cartesian coordinates are expected.
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*** All functions allow for "res" to be equivalent to some other param.
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*/
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#define G3S_RAD 0
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#define G3S_THETA 1
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#define G3S_PHI 2
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#define G3S_MY 1
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#define G3S_MZ 2
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#define G3S_RESCOPY(res,co) int copy = 0; \
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if (res == co) { \
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res = g3v_create(); \
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copy = 1; \
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}
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#define G3S_RESFREE(res,co) if (copy) { \
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g3v_copy(co,res); \
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g3v_free(res); \
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res = co; \
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}
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/*
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** Some transformation between coord. systems:
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** cc: Cartesian
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** sph: spherical
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** mtr: metrical spherical
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** tr: transversal spherical
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*/
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g3Vec g3s_sphtocc(g3Vec res,g3Vec sph);
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g3Vec g3s_cctosph(g3Vec res,g3Vec cc);
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g3Vec g3s_sphwrap(g3Vec sph);
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g3Vec g3s_trwrap(g3Vec tr);
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g3Vec g3s_mtrtocc(g3Vec res,g3Vec mtr);
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g3Vec g3s_cctomtr(g3Vec res,g3Vec cc);
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g3Vec g3s_trtocc(g3Vec res,g3Vec mtr);
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g3Vec g3s_cctotr(g3Vec res,g3Vec cc);
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g3Vec g3s_sphtotr(g3Vec res,g3Vec sph);
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g3Vec g3s_trtosph(g3Vec res,g3Vec tr);
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g3Float g3s_dist(const g3Vec cc1,const g3Vec cc2);
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g3Float g3s_dist_norm(const g3Vec cc1,const g3Vec cc2);
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#ifdef __cplusplus
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}
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#endif
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#endif
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