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#ifndef __Geom_MACROS_H__
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#define __Geom_MACROS_H__
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* Pixel buffer rendering library
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* Lauris Kaplinski <lauris@kaplinski.com>
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* This code is in public domain
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#define nr_new(t,n) ((t *) malloc ((n) * sizeof (t)))
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#define nr_renew(p,t,n) ((t *) realloc (p, (n) * sizeof (t)))
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#define MAX(a,b) (((a) < (b)) ? (b) : (a))
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#define MIN(a,b) (((a) > (b)) ? (b) : (a))
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/** Returns v bounded to within [a, b]. If v is NaN then returns a.
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# define CLAMP(v,a,b) \
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#define Geom_DF_TEST_CLOSE(a,b,e) (fabs ((a) - (b)) <= (e))
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// Todo: move these into matrix.h
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#define Geom_MATRIX_DF_TEST_TRANSFORM_CLOSE(a,b,e) (Geom_DF_TEST_CLOSE ((*(a))[0], (*(b))[0], e) && \
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Geom_DF_TEST_CLOSE ((*(a))[1], (*(b))[1], e) && \
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Geom_DF_TEST_CLOSE ((*(a))[2], (*(b))[2], e) && \
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Geom_DF_TEST_CLOSE ((*(a))[3], (*(b))[3], e))
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#define Geom_MATRIX_DF_TEST_TRANSLATE_CLOSE(a,b,e) (Geom_DF_TEST_CLOSE ((*(a))[4], (*(b))[4], e) && \
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Geom_DF_TEST_CLOSE ((*(a))[5], (*(b))[5], e))
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#define Geom_MATRIX_DF_TEST_CLOSE(a,b,e) (Geom_MATRIX_DF_TEST_TRANSLATE_CLOSE (a, b, e) && \
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Geom_MATRIX_DF_TEST_TRANSFORM_CLOSE (a, b, e))
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#define Geom_RECT_DFLS_TEST_EMPTY(a) (((a)->x0 >= (a)->x1) || ((a)->y0 >= (a)->y1))
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#define Geom_RECT_DFLS_TEST_INTERSECT(a,b) (((a)->x0 < (b)->x1) && ((a)->x1 > (b)->x0) && ((a)->y0 < (b)->y1) && ((a)->y1 > (b)->y0))
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#define Geom_RECT_DF_POINT_DF_TEST_INSIDE(r,p) (((p)->x >= (r)->x0) && ((p)->x < (r)->x1) && ((p)->y >= (r)->y0) && ((p)->y < (r)->y1))
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#define Geom_RECT_LS_POINT_LS_TEST_INSIDE(r,p) (((p)->x >= (r)->x0) && ((p)->x < (r)->x1) && ((p)->y >= (r)->y0) && ((p)->y < (r)->y1))
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#define Geom_MATRIX_D_TO_DOUBLE(m) ((m)->c)
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#define Geom_MATRIX_D_FROM_DOUBLE(d) ((NRMatrix *) &(d)[0])