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path: root/src/mtx_bspline.c
 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 ``` ``````/* * 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_bspline: this is only in the iemmatrix library since i have to make sure that there is an x-value for each y-value; this however enforces that for each point we have to define a point in all dimensions; think: should we split this into 2 objects? - one for calculating the coefficients of the polynomial function for the bspline - another for calculating the value of a piecewise polyfuns */ static t_class *mtx_bspline_class; typedef struct _mtx_spline { t_object x_obj; t_outlet *x_outlet; int x_numpoints; int x_dimension; t_matrixfloat x_min, x_max; t_matrixfloat*x_x; t_matrixfloat**x_y, **x_u, **x_p; t_atom*x_result; } t_mtx_spline; static void mtx_bspline_resize(t_mtx_spline *x, int cols, int dim){ int size=x->x_numpoints*sizeof(t_matrixfloat); int i=0; if(x->x_x)freebytes(x->x_x, size); x->x_x=0; for(i=0; ix_dimension; i++){ if(x->x_y&&x->x_y[i])freebytes(x->x_y[i], size); x->x_y[i]=0; if(x->x_u&&x->x_u[i])freebytes(x->x_u[i], size); x->x_u[i]=0; if(x->x_p&&x->x_p[i])freebytes(x->x_p[i], size); x->x_p[i]=0; } if(x->x_y)freebytes(x->x_y, x->x_dimension*sizeof(t_matrixfloat*)); x->x_y=0; if(x->x_u)freebytes(x->x_u, x->x_dimension*sizeof(t_matrixfloat*)); x->x_u=0; if(x->x_p)freebytes(x->x_p, x->x_dimension*sizeof(t_matrixfloat*)); x->x_p=0; if(x->x_result)freebytes(x->x_result, x->x_dimension*sizeof(t_atom)); x->x_p=0; if(dim<1)dim=1; if(cols<0)cols=0; x->x_numpoints = cols; x->x_dimension = dim; if(cols>0){ size=x->x_numpoints*sizeof(t_matrixfloat); x->x_x = (t_matrixfloat*)getbytes(size); x->x_result = (t_atom*)getbytes(x->x_dimension*sizeof(t_atom)); x->x_y = (t_matrixfloat**)getbytes(dim*sizeof(t_matrixfloat*)); x->x_u = (t_matrixfloat**)getbytes(dim*sizeof(t_matrixfloat*)); x->x_p = (t_matrixfloat**)getbytes(dim*sizeof(t_matrixfloat*)); for(i=0; ix_dimension; i++){ x->x_y[i] = (t_matrixfloat*)getbytes(size); x->x_u[i] = (t_matrixfloat*)getbytes(size); x->x_p[i] = (t_matrixfloat*)getbytes(size); } } } static void mtx_bspline_matrix2(t_mtx_spline *X, t_symbol *s, int argc, t_atom *argv) { int row=0; int col=0; t_matrixfloat *x, **y, **u, **p, *w, *d, *fp; t_matrixfloat*dummy; int i,j; int N; if (argc<2){ error("mtx_bspline: crippled matrix"); return; } row=atom_getfloat(argv); col=atom_getfloat(argv+1); if ((col<2)||(row<3)) { error("mtx_bspline: invalid dimensions"); return; } if (col*row>argc-2){ error("sparse matrix not yet supported : use \"mtx_check\""); return; } col--; mtx_bspline_resize(X, row, col); /* 1st fill the matrix into the arrays */ fp=matrix2float(argv); dummy=fp; x=X->x_x; y=X->x_y; u=X->x_u; p=X->x_p; for(i=0; ix_min=x[0]; X->x_max=x[row-1]; w=(t_matrixfloat*)getbytes(X->x_numpoints*sizeof(t_matrixfloat)); d=(t_matrixfloat*)getbytes(X->x_numpoints*sizeof(t_matrixfloat)); N=row-1; for(j=0; j0; i--) p[j][i] = (w[i]-u[j][i]*p[j][i+1])/d[i]; } } static void mtx_bspline_list(t_mtx_spline *x, t_symbol *s, int argc, t_atom *argv) { /* this should output a matrix, one row for each element of this list */ } static void mtx_bspline_float(t_mtx_spline *X, t_float f) { int i=0, j=0; int dim=X->x_dimension; t_matrixfloat *x=X->x_x, **y=X->x_y, **u=X->x_u, **p=X->x_p; t_atom*result=X->x_result; if(dim<1){ outlet_float(X->x_outlet, 0.f); return; } if(fx_min)f=X->x_min; if(f>X->x_max)f=X->x_max; while(f>x[i+1])i++; for(j=0; jx_outlet, 0, dim, result); } static void mtx_bspline_free(t_mtx_spline *x) { mtx_bspline_resize(x, 0, 0); } static void *mtx_bspline_new(void) { t_mtx_spline *x = (t_mtx_spline *)pd_new(mtx_bspline_class); inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("matrix"), gensym("")); x->x_numpoints=0; x->x_dimension=0; x->x_min=0.0; x->x_max=0.0; x->x_x=0; x->x_y=x->x_u=x->x_p=0; x->x_result=0; x->x_outlet=outlet_new(&x->x_obj, 0); return(x); } void mtx_bspline_setup(void) { mtx_bspline_class = class_new(gensym("mtx_bspline"), (t_newmethod)mtx_bspline_new, (t_method)mtx_bspline_free, sizeof(t_mtx_spline), 0, A_NULL); /* class_addmethod(mtx_bspline_class, (t_method)mtx_bspline_matrix, gensym("list"), A_GIMME, 0); */ class_addmethod(mtx_bspline_class, (t_method)mtx_bspline_matrix2, gensym(""), A_GIMME, 0); class_addfloat (mtx_bspline_class, mtx_bspline_float); } void iemtx_bspline_setup(void) { mtx_bspline_setup(); } ``````