72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
/*
|
|
* face.h - Data structure and handling of one face of a part
|
|
*
|
|
* Written 2010 by Werner Almesberger
|
|
* Copyright 2010 by Werner Almesberger
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef FACE_H
|
|
#define FACE_H
|
|
|
|
#include <math.h>
|
|
|
|
#include "array.h"
|
|
#include "matrix.h"
|
|
|
|
|
|
struct face {
|
|
struct array *a;
|
|
double x_step, y_step, z_step;
|
|
int sx, sy, sz; /* size */
|
|
int cx, cy; /* center */
|
|
int z_ref;
|
|
double fx, fy; /* inclination factor */
|
|
struct matrix m;
|
|
};
|
|
|
|
|
|
static inline double face_z0(const struct face *f, int x, int y)
|
|
{
|
|
return f->z_ref+f->fx*(x-f->sx/2)+f->fy*(y-f->sy/2);
|
|
}
|
|
|
|
|
|
static inline double z0_scale(const struct face *f)
|
|
{
|
|
return f->z_step/f->x_step;
|
|
}
|
|
|
|
|
|
static inline double fx_to_angle(const struct face *f)
|
|
{
|
|
return atan(f->fx*z0_scale(f))/M_PI*180;
|
|
}
|
|
|
|
|
|
static inline double fy_to_angle(const struct face *f)
|
|
{
|
|
return atan(f->fy*z0_scale(f))/M_PI*180;
|
|
}
|
|
|
|
|
|
static inline void fx_from_angle(struct face *f, double a)
|
|
{
|
|
f->fx = tan(a/180*M_PI)/z0_scale(f);
|
|
}
|
|
|
|
|
|
static inline void fy_from_angle(struct face *f, double a)
|
|
{
|
|
f->fy = tan(a/180*M_PI)/z0_scale(f);
|
|
}
|
|
|
|
|
|
struct face *read_face(const char *name);
|
|
|
|
#endif /* !FACE_H */
|