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localmath.h
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localmath.h
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#ifndef LOCALMATH
#define LOCALMATH
#include "tol.h"
typedef FLOAT twoD[2];
#define ABS(a) ((a)>0.0 ? (a) : -(a))
/* line dot product line vs. point */
#define ldot(a,b) ((a)[0]*(b)[0] + (a)[1]*(b)[1] + (a)[2])
/*
* line cross product a line from two points
* (az, ay, 1) x (bx, bx, 1)
*/
#define lcross(a, b, c) { (c)[0] = (a)[1] - (b)[1]; \
(c)[1] = (b)[0] - (a)[0]; \
(c)[2] = (a)[0]*(b)[1] - (a)[1]*(b)[0]; }
#define vsub2(a, b, c) { (c)[0] = (a)[0] - (b)[0]; \
(c)[1] = (a)[1] - (b)[1]; }
#define vadd2(a, b, c) { (c)[0] = (a)[0] + (b)[0]; \
(c)[1] = (a)[1] + (b)[1]; }
#define vcopy2(a, b) { (b)[0] = (a)[0]; \
(b)[1] = (a)[1]; }
#define vmult2(s,a,b) { (b)[0] = (s)*(a)[0]; \
(b)[1] = (s)*(a)[1]; }
#define dot2(a,b) ((a)[0]*(b)[0] + (a)[1]*(b)[1])
#define cross2(a,b) ((a)[0]*(b)[1] - (a)[1]*(b)[0])
#define aprxlen2(a) (ABS((a)[0]) + ABS((a)[1]))
#define midpoint(a, b, c) { (c)[0] = ((a)[0] + (b)[0])*.5; \
(c)[1] = ((a)[1] + (b)[1])*.5; \
(c)[2] = ((a)[2] + (b)[2])*.5; }
#define dot(a,b) ((a)[0]*(b)[0] + (a)[1]*(b)[1] + (a)[2]*(b)[2])
#define min(a,b) ((a)<(b) ?(a):(b))
#define max(a,b) ((a)>(b) ?(a):(b))
#define square(a) ((a)*(a))
typedef FLOAT point[3];
typedef FLOAT vector[3];
typedef FLOAT triple[3];
typedef FLOAT plane[4];
#define vadd(a, b, c) { (c)[0] = (a)[0] + (b)[0]; \
(c)[1] = (a)[1] + (b)[1]; \
(c)[2] = (a)[2] + (b)[2]; }
#define vsub(a, b, c) { (c)[0] = (a)[0] - (b)[0]; \
(c)[1] = (a)[1] - (b)[1]; \
(c)[2] = (a)[2] - (b)[2]; }
#define vmult(s, a, b) { (b)[0] = (s)*(a)[0]; \
(b)[1] = (s)*(a)[1]; \
(b)[2] =(s)*(a)[2]; }
#define size2(a) dot((a),(a))
#define vzero2(a) { (a)[0] = (a)[1] = 0.0; }
#define vlinc(s, a, t, b, c) { (c)[0] = (s)*(a)[0] + (t)*(b)[0]; \
(c)[1] = (s)*(a)[1] + (t)*(b)[1]; \
(c)[2] = (s)*(a)[2] + (t)*(b)[2]; }
/* multiply and add */
#define vmadd(s, a, b, c) { (c)[0] = (s)*(a)[0] + (b)[0]; \
(c)[1] = (s)*(a)[1] + (b)[1]; \
(c)[2] = (s)*(a)[2] + (b)[2]; }
#define vzero(a) { (a)[0] = (a)[1] = (a)[2] = 0.0; }
#define vcopy(a, b) { (b)[0] = (a)[0]; \
(b)[1] = (a)[1]; \
(b)[2] = (a)[2]; }
#define vneg(a,b) { (b)[0] = -(a)[0]; \
(b)[1] = -(a)[1]; \
(b)[2] = -(a)[2]; }
#ifdef DOUBLE
#define unit2(a,b,eps) d_unit2(a,b,eps)
#define triple_cross(a,b,c) d_triple_cross(a,b,c)
#define cross(a,b,c) d_cross(a,b,c)
#define unit(a,b) d_unit(a,b)
#define solve3(a,x,b) d_solve3(a,x,b)
#define gen_perp(a,b) d_gen_perp(a,b)
#define distance(a,b) d_distance(a,b)
#define vswap(a,b) d_vswap(a,b)
#define Fsort(a,b) d_sort(a,b)
#define Fmerge_sort(a,b,c) d_merge_sort(a,b,c)
#else
#define unit2(a,b,eps) s_unit2(a,b,eps)
#define triple_cross(a,b,c) s_triple_cross(a,b,c)
#define cross(a,b,c) s_cross(a,b,c)
#define unit(a,b) s_unit(a,b)
#define solve3(a,x,b) s_solve3(a,x,b)
#define gen_perp(a,b) s_gen_perp(a,b)
#define distance(a,b) s_distance(a,b)
#define vswap(a,b) s_vswap(a,b)
#define Fsort(a,b) s_sort(a,b)
#define Fmerge_sort(a,b,c) s_merge_sort(a,b,c)
#endif
#ifdef __cplusplus
extern "C" {
#endif
void i_sort(int size, int *list);
#ifdef DOUBLE
int d_unit2(double *a, double *b, double eps);
double d_triple_cross(double *a, double *b, double *c);
void d_cross(double *a, double *b, double *c);
int d_unit(double *a, double *b);
int d_solve3(double a[3][3], double *b, double *x);
void d_gen_perp(double *v, double *perp);
double d_distance(double *a, double *b);
void d_vswap(double *a, double *b);
void d_sort(int i, double *a);
void d_merge_sort(int size, float *list, float *temp);
#else
int s_unit2(float *a, float *b, float eps);
float s_triple_cross(float *a, float *b, float *c);
void s_cross(float *a, float *b, float *c);
int s_unit(float *a, float *b);
int s_solve3(float a[3][3], float *b, float *x);
void s_gen_perp(float *v, float *perp);
float s_distance(float *a, float *b);
void s_vswap(float *a, float *b);
void s_sort(int i, float *a);
void s_merge_sort(int size, float *list, float *temp);
int invert3(float from[3][3], float to[3][3]);
#endif
#ifdef __cplusplus
}
#endif
#define SWAP(type,a,b) {type temp = (a); (a) = (b); (b) = temp; }
#define ORDER(type, a, b) if((a) > (b)) SWAP(type, a, b);
#endif