--- ray/src/util/rmatrix.h	2014/05/31 05:02:37	2.1
+++ ray/src/util/rmatrix.h	2022/03/05 01:45:21	2.15
@@ -1,4 +1,4 @@
-/* RCSid $Id: rmatrix.h,v 2.1 2014/05/31 05:02:37 greg Exp $ */
+/* RCSid $Id: rmatrix.h,v 2.15 2022/03/05 01:45:21 greg Exp $ */
 /*
  * Header file for general matrix routines.
  */
@@ -12,38 +12,62 @@
 extern "C" {
 #endif
 
-/* General plane-ordered component matrix */
+/* Preferred BSDF component:
+	transmission, reflection front (normal side), reflection back */
+typedef enum {RMPtrans=0, RMPreflF, RMPreflB} RMPref;
+
+/* General [row][col][cmp] component matrix */
 typedef struct {
-	int	nrows, ncols, ncomp;
-	double	mtx[1];			/* extends struct */
+	char	*info;
+	void	*mapped;
+	double	*mtx;
+	COLOR	cexp;
+	int	nrows, ncols;
+	short	ncomp;
+	uby8	dtype;
+	uby8	swapin;
 } RMATRIX;
 
-#define rmx_indx(rm,r,c,i)	(((i)*(rm)->nrows+(r))*(rm)->ncols+(c))
+#define rmx_lval(rm,r,c)	((rm)->mtx + (rm)->ncomp*((c)+(size_t)(rm)->ncols*(r)))
 
-#define rmx_lval(rm,r,c,i)	(rm)->mtx[rmx_indx(rm,r,c,i)]
+/* Initialize a RMATRIX struct but don't allocate array space */
+extern RMATRIX	*rmx_new(int nr, int nc, int n);
 
-#define rmx_free(rm)		free(rm)
+/* Prepare a RMATRIX for writing (allocate array if needed) */
+extern int	rmx_prepare(RMATRIX *rm);
 
-/* Allocate a nr x nc matrix with n components */
+/* Call rmx_new() and rmx_prepare() */
 extern RMATRIX	*rmx_alloc(int nr, int nc, int n);
 
-/* Load matrix from supported file type */
-extern RMATRIX	*rmx_load(const char *fname);
+/* Free a RMATRIX array */
+extern void	rmx_free(RMATRIX *rm);
 
-/* Write matrix to file type indicated by dt */
-extern long	rmx_write(const RMATRIX *rm, int dtype, FILE *fp);
+/* Resolve data type based on two input types (returns 0 for mismatch) */
+extern int	rmx_newtype(int dtyp1, int dtyp2);
 
+/* Load matrix from supported file type (NULL for stdin, '!' with command) */
+extern RMATRIX	*rmx_load(const char *inspec, RMPref rmp);
+
+/* Append header information associated with matrix data */
+extern int	rmx_addinfo(RMATRIX *rm, const char *info);
+
+/* Write matrix to file type indicated by dtype */
+extern int	rmx_write(const RMATRIX *rm, int dtype, FILE *fp);
+
 /* Allocate and assign square identity matrix with n components */
 extern RMATRIX	*rmx_identity(int dim, int n);
 
 /* Duplicate the given matrix */
 extern RMATRIX	*rmx_copy(const RMATRIX *rm);
 
-/* Swap rows and columns in the given matrix in situ */
-extern int	rmx_transpose(RMATRIX *rm);
+/* Allocate and assign transposed matrix */
+extern RMATRIX	*rmx_transpose(const RMATRIX *rm);
 
 /* Multiply (concatenate) two matrices and allocate the result */
 extern RMATRIX	*rmx_multiply(const RMATRIX *m1, const RMATRIX *m2);
+
+/* Element-wise multiplication (or division) of m2 into m1 */
+extern int	rmx_elemult(RMATRIX *m1, const RMATRIX *m2, int divide);
 
 /* Sum second matrix into first, applying scale factor beforehand */
 extern int	rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]);