/* * iemmatrix * * objects for manipulating simple matrices * mostly refering to matlab/octave matrix functions * * Copyright (c) IOhannes m zmölnig, forum::für::umläute * IEM, Graz, Austria * * For information on usage and redistribution, and for a DISCLAIMER OF ALL * WARRANTIES, see the file, "LICENSE.txt," in this distribution. * */ #include "iemmatrix.h" /* mtx_distance2: gets the euclidian distances (squared) between 2 sets of n-dimensional vectors */ /* -­------------------------------------------------------------- */ /* matrix math */ /* mtx_distance2 */ static t_class *mtx_distance2_class; static void mtx_distance2_matrix(t_mtx_binmtx *x, t_symbol *s, int argc, t_atom *argv) { int row=atom_getfloat(argv); int col=atom_getfloat(argv+1); int row2=0, col2=0; t_atom *m; t_atom *m1 = argv+2; t_atom *m2 = x->m2.atombuffer+2; int i, j; if (argc<2){ post("mtx_distance2: crippled matrix"); return; } if ((col<1)||(row<1)) { post("mtx_distance2: invalid dimensions"); return; } if (col*row>argc-2){ post("sparse matrix not yet supported : use \"mtx_check\""); return; } row2=x->m2.row; col2=x->m2.col; if (!(col2*row2)) { /* 2nd matrix is NULL; take the 1st matrix instead (distance between it's own vectors) */ m2=argv+2; row2=row; col2=col; } else if (col!=col2){ post("mtx_distance2: matrix dimensions do not match"); return; } adjustsize(&x->m, row, row2); m = x->m.atombuffer+2; for(i=0; ix_obj.ob_outlet, gensym("matrix"), row*row2+2, x->m.atombuffer); } static void *mtx_distance2_new(void) { t_mtx_binmtx *x = (t_mtx_binmtx *)pd_new(mtx_distance2_class); inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("matrix"), gensym("")); outlet_new(&x->x_obj, 0); x->m.col = x->m.row = x->m2.col = x->m2.row = 0; x->m.atombuffer = x->m2.atombuffer = 0; return(x); } void mtx_distance2_setup(void) { mtx_distance2_class = class_new(gensym("mtx_distance2"), (t_newmethod)mtx_distance2_new, (t_method)mtx_binmtx_free, sizeof(t_mtx_binmtx), 0, A_NULL, 0); class_addmethod(mtx_distance2_class, (t_method)mtx_distance2_matrix, gensym("matrix"), A_GIMME, 0); class_addmethod(mtx_distance2_class, (t_method)mtx_bin_matrix2, gensym(""), A_GIMME, 0); class_addbang (mtx_distance2_class, mtx_binmtx_bang); class_sethelpsymbol(mtx_distance2_class, gensym("iemmatrix/mtx_distance2")); } void iemtx_distance2_setup(void) { mtx_distance2_setup(); }