1 files changed, 59 insertions, 0 deletions
diff --git a/src/mtx_scroll.c b/src/mtx_scroll.c
new file mode 100644
index 0000000..5b4fffa
--- /dev/null
+++ b/src/mtx_scroll.c
@@ -0,0 +1,59 @@
+/*
+ *  iemmatrix
+ *
+ *  objects for manipulating simple matrices
+ *  mostly refering to matlab/octave matrix functions
+ *
+ * (c) IOhannes m zmölnig, forum::für::umläute
+ * 
+ * IEM, Graz
+ *
+ * this code is published under the LGPL
+ *
+ */
+#include "iemmatrix.h"
+
+/* mtx_scroll */
+/* scroll the rows */
+static t_class *mtx_scroll_class;
+
+static void mtx_scroll_matrix(t_matrix *x, t_symbol *s, int argc, t_atom *argv)
+{
+  int row=atom_getfloat(argv++);
+  int col=atom_getfloat(argv++);
+  int rowscroll = ((int)x->f%row+row)%row;
+
+  if(row*col>argc-2) {
+    post("mtx_scroll: sparse matrices not yet supported : use \"mtx_check\"");
+    return;
+  }
+  adjustsize(x, row, col);
+
+  memcpy(x->atombuffer+2, argv+(row-rowscroll)*col, rowscroll*col*sizeof(t_atom));
+  memcpy(x->atombuffer+2+rowscroll*col, argv, (row-rowscroll)*col*sizeof(t_atom));
+
+  matrix_bang(x);
+}
+
+static void *mtx_scroll_new(t_symbol *s, int argc, t_atom *argv)
+{
+  t_matrix *x = (t_matrix *)pd_new(mtx_scroll_class);
+  floatinlet_new(&x->x_obj, &(x->f));
+  outlet_new(&x->x_obj, 0);
+
+  x->f=argc?atom_getfloat(argv):0;
+  x->col=x->row=0;
+  x->atombuffer=0;
+  return (x);
+}
+void mtx_scroll_setup(void)
+{
+  mtx_scroll_class = class_new(gensym("mtx_scroll"), (t_newmethod)mtx_scroll_new, 
+				  (t_method)matrix_free, sizeof(t_matrix), 0, A_GIMME, 0);
+  class_addbang  (mtx_scroll_class, matrix_bang);
+  class_addmethod(mtx_scroll_class, (t_method)mtx_scroll_matrix, gensym("matrix"), A_GIMME, 0);
+  class_sethelpsymbol(mtx_scroll_class, gensym("iemmatrix/mtx_transpose"));
+}
+void iemtx_scroll_setup(void){
+  mtx_scroll_setup();
+}