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/*
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** Author: Christian Reetz ([email protected])
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*/
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#ifndef __G3VECTOR_H
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#define __G3VECTOR_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include "gbasic.h"
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#include "fvect.h"
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typedef g3Float* g3Vec;
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#define g3v_angle(v1,v2) (acos(g3v_dot((v1),(v2))))
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g3Vec g3v_create();
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void g3v_free(g3Vec v);
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g3Vec g3v_copy(g3Vec dest,g3Vec src);
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g3Vec g3v_zero(g3Vec v);
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g3Vec g3v_set(g3Vec v,g3Float x,g3Float y,g3Float z);
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g3Vec g3v_sane(g3Vec v);
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g3Vec g3v_fromrad(g3Vec v,FVECT rv);
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void g3v_torad(FVECT rv,g3Vec v);
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/*
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** Orderering is done component wise, with decreasing significance
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** Returns -1, 0 or 1 if v1 is less, equal or greater than v2
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*/
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int g3v_epsorder(g3Vec v1,g3Vec v2);
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/*
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** Returns true if v1 and v2 are epsilon equal
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*/
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int g3v_epseq(g3Vec v1,g3Vec v2);
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int g3v_epszero(g3Vec v);
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/* Euclidean length of vector */
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g3Float g3v_length(g3Vec v);
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/*
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** Common operations on vectors. All routines returns zero on errors or
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** the result as a g3Float
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*/
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g3Float g3v_dot(g3Vec v1,g3Vec v2);
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g3Vec g3v_scale(g3Vec res,g3Vec v,g3Float sc);
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g3Vec g3v_normalize(g3Vec v);
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g3Vec g3v_cross(g3Vec res,g3Vec v1,g3Vec v2);
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g3Vec g3v_sub(g3Vec res,g3Vec v1,g3Vec v2);
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g3Vec g3v_add(g3Vec res,g3Vec v1,g3Vec v2);
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g3Vec g3v_rotate(g3Vec res,g3Vec v,g3Vec rnorm,g3Float ang);
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g3Vec g3v_print(g3Vec v,FILE* fp);
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int g3v_read(g3Vec v,FILE* fp);
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#ifdef __cplusplus
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}
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#endif
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#endif
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