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f3e7c1ec73
- solidify/face.h (struct matrix), solidify/face.c (read_file): also record the face's center - solidify/overlap.c (point): reference faces to the screen center - solidify/overlap.c (point): use correct model coordinates for z0 calculation
51 lines
955 B
C
51 lines
955 B
C
/*
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* face.h - Data structure and handling of one face of a part
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*
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* Written 2010 by Werner Almesberger
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* Copyright 2010 by Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef FACE_H
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#define FACE_H
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#include "array.h"
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/*
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* 2D transformation:
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*
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* x' = x*a[0][0]+y*a[0][1]+b[0]
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* y' = x*a[1][0]+y*a[1][1]+b[1]
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*/
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struct matrix {
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double a[2][2];
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double b[2];
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};
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struct face {
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struct array *a;
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int sx, sy; /* size */
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int cx, cy; /* center */
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int z_ref;
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double fx, fy; /* inclination factor */
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struct matrix m;
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};
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static inline double face_z0(const struct face *f, int x, int y)
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{
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return f->z_ref+f->fx*(x-f->sx/2)+f->fy*(y-f->sy/2);
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}
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struct face *read_face(const char *name);
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#endif /* FACE_H */
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