Re: where is Math.Matrix->`/ ?
Something like this, maybe?
Feel free to patch your Pike and test it out. I'm not checking this in
for the current 7.8.
/Mirar
| > Math.Matrix m=Math.Matrix(3,4);
| (2) Result: Math.Matrix( ({ ({ 1, 0, 0}),
| ({ 0, 1, 0}),
| ({ 0, 0, 1}),
| ({ 0, 0, 0}) }) )
| > for (int i=0; i<3; i++) for (int j=0; j<4; j++) m->poke(i,j,i*10+j); m;
| Ok.
| (3) Result: Math.Matrix( ({ ({ 0, 10, 20}),
| ({ 1, 11, 21}),
| ({ 2, 12, 22}),
| ({ 3, 13, 23}) }) )
| > m->peek(1,1);
| (4) Result: 11.0
| > m->peek(2,1);
| (5) Result: 21.0
| > object m=Math.Matrix(({1,2,3,4})/2);
| > object m2=Math.Matrix(m);
| > m2->poke(0,1,17);
| (1) Result: Math.Matrix( ({ ({ 1, 2}),
| ({ 17, 4}) }) )
| > m;
| (2) Result: Math.Matrix( ({ ({ 1, 2}),
| ({ 3, 4}) }) )
Patch:
Index: math_matrix.c
===================================================================
RCS file: /pike/data/cvsroot/Pike/7.8/src/modules/Math/math_matrix.c,v
retrieving revision 1.40
diff -u -r1.40 math_matrix.c
--- math_matrix.c 18 Dec 2007 23:24:49 -0000 1.40
+++ math_matrix.c 24 Aug 2008 16:13:40 -0000
@@ -64,7 +64,9 @@
#define Xmatrix(X) PIKE_CONCAT(X,imatrix)
#define XmatrixY(X,Y) PIKE_CONCAT3(X,imatrix,Y)
#define PUSH_ELEM( X ) push_int( (INT_TYPE)(X) )
+#define INT_ELEMS
#include <matrix_code.h>
+#undef INT_ELEMS
#undef PUSH_ELEM
#undef Xmatrix
#undef matrixX
@@ -81,7 +83,9 @@
#define Xmatrix(X) PIKE_CONCAT(X,lmatrix)
#define XmatrixY(X,Y) PIKE_CONCAT3(X,lmatrix,Y)
#define PUSH_ELEM( X ) push_int64( (INT64)(X) )
+#define INT_ELEMS
#include <matrix_code.h>
+#undef INT_ELEMS
#undef PUSH_ELEM
#undef Xmatrix
#undef matrixX
@@ -114,7 +118,9 @@
#define Xmatrix(X) PIKE_CONCAT(X,smatrix)
#define XmatrixY(X,Y) PIKE_CONCAT3(X,smatrix,Y)
#define PUSH_ELEM( X ) push_int( (INT_TYPE)(X) )
+#define INT_ELEMS
#include <matrix_code.h>
+#undef INT_ELEMS
#undef PUSH_ELEM
#undef Xmatrix
#undef matrixX
@@ -150,6 +156,10 @@
*! rotation matrix.
*/
+/*! @decl void create(Matrix to_clone)
+ *! When given another @[Matrix] of similar type as argumnet, this is cloned.
+ */
+
/* ---------------------------------------------------------------- */
/*! @decl array(array) cast(string to_what)
@@ -237,6 +247,17 @@
*! Returns the height of the matrix.
*/
+/*! @decl Matrix poke(int x,int y,float value)
+ *! @decl Matrix poke(int column,int row,float value)
+ *! Destructively change a value in the matrix. 0,0 is top left.
+ */
+
+/*! @decl float peek(int x,int y)
+ *! @decl float peek(int column,int row)
+ *! Read out one value from the matrix. 0,0 is top left.
+ */
+
+
/*! @endclass
*/
Index: matrix_code.h
===================================================================
RCS file: /pike/data/cvsroot/Pike/7.8/src/modules/Math/matrix_code.h,v
retrieving revision 1.20
diff -u -r1.20 matrix_code.h
--- matrix_code.h 28 Jun 2008 23:05:59 -0000 1.20
+++ matrix_code.h 24 Aug 2008 16:13:40 -0000
@@ -204,6 +204,26 @@
done_made:
;
}
+ else if (Pike_sp[-args].type==T_OBJECT)
+ {
+ struct matrixX(_storage) *mx=NULL;
+
+ if (Pike_sp[-args].type!=T_OBJECT ||
+ !((mx=(struct matrixX(_storage)*)
+ get_storage(Pike_sp[-1].u.object,XmatrixY(math_,_program)))))
+ SIMPLE_BAD_ARG_ERROR(PNAME,1,"object(Math."PNAME")");
+
+ THIS->xsize=xs=mx->xsize;
+ THIS->ysize=ys=mx->ysize;
+
+ THIS->m=m=malloc(sizeof(FTYPE)*xs*ys);
+ if (!m)
+ SIMPLE_OUT_OF_MEMORY_ERROR(PNAME,
+ sizeof(FTYPE)*xs*ys);
+ MEMCPY(THIS->m,
+ mx->m,
+ sizeof(FTYPE)*xs*ys);
+ }
else if (Pike_sp[-args].type==T_STRING)
{
char *dummy;
@@ -939,6 +959,42 @@
}
+static void matrixX(_poke)(INT32 args)
+{
+ INT_TYPE row,column;
+#ifdef INT_ELEMS
+ LONGEST value;
+ get_all_args("poke",args,"%i%i%l",&column,&row,&value);
+#else
+ FLOAT_TYPE value;
+ get_all_args("poke",args,"%i%i%F",&column,&row,&value);
+#endif
+
+ if (row<0 || row>=THIS->ysize)
+ SIMPLE_BAD_ARG_ERROR("poke",2, "No such row");
+ if (column<0 || column>=THIS->ysize)
+ SIMPLE_BAD_ARG_ERROR("poke",2, "No such column");
+
+ THIS->m[row*THIS->xsize+column]=(FTYPE)value;
+
+ pop_n_elems(args);
+ ref_push_object(THISOBJ);
+}
+
+static void matrixX(_peek)(INT32 args)
+{
+ INT_TYPE row,column;
+
+ get_all_args("poke",args,"%i%i",&column,&row);
+ if (row<0 || row>=THIS->ysize)
+ SIMPLE_BAD_ARG_ERROR("peek",2, "No such row");
+ if (column<0 || column>=THIS->ysize)
+ SIMPLE_BAD_ARG_ERROR("peek",2, "No such column");
+
+ pop_n_elems(args);
+ PUSH_ELEM(THIS->m[row*THIS->xsize+column]);
+}
+
/* ---------------------------------------------------------------- */
void Xmatrix(init_math_)(void)
@@ -959,9 +1015,10 @@
set_exit_callback(Xmatrix(exit_));
ADD_FUNCTION("create",matrixX(_create),
- tOr4( tFunc(tArr(tArr(tOr(tInt,tFloat))), tVoid),
+ tOr5( tFunc(tArr(tArr(tOr(tInt,tFloat))), tVoid),
tFunc(tArr(tOr(tInt,tFloat)), tVoid),
tFuncV(tStr, tMix, tVoid),
+ tFunc(tObj, tVoid),
tFunc(tInt1Plus tInt1Plus tOr4(tInt,tFloat,tString,tVoid), tVoid)), ID_PROTECTED);
ADD_FUNCTION("cast",matrixX(_cast),
@@ -1008,6 +1065,9 @@
ADD_FUNCTION("xsize", matrixX(_xsize), tFunc(tNone, tInt), 0);
ADD_FUNCTION("ysize", matrixX(_ysize), tFunc(tNone, tInt), 0);
+ ADD_FUNCTION("poke", matrixX(_poke), tFunc(tInt tInt tOr(tFloat,tInt),tObj), 0);
+ ADD_FUNCTION("peek", matrixX(_peek), tFunc(tInt tInt,PTYPE), 0);
+
Pike_compiler->new_program->flags |=
PROGRAM_CONSTANT |
PROGRAM_NO_EXPLICIT_DESTRUCT ;
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