Hello,
Here is a piece of C code that maps an array of 1's and 0's in graph to emboss
ready ASCII characters.
Storing computer code values for each cell is a straightforward step.
These values would reside in a 2-dimensional array referenced by Dr. Nemeth as
page and follow from assign_code's index value.
I provided code_table in order to illustrate dot combinations to ASCII character.
You will see the pattern Dr. Nemeth alludes to by sending it to a brasille
embosser.
The computer braille code table uses dots 1 through 6 only of 8 dot braille.
For refreshable braille, it would be useful to drive all 256
combinations of an 8 dot cell. The Braille Lite, for example, would be an
excellent demonstration device. Would one of you come forward with such a
table for the Braille Lite?
#define ROW_MAX 117
#define COL_MAX 90
#define CELL_ROW_MAX 37
#define CELL_COL_MAX 45
word graph[ROW_MAX][COL_MAX];
word page[CELL_ROW_MAX][CELL_COL_MAX];
void assign_code(word dot1, word dot2, word dot3, word dot4, word dot5, word dot6, char *code_ptr)
{ /* assign_code */
word index;
char code_table[LINE_MAX];
strcpy(code_table, " a1b'k2l`cif/msp\"e3h9o6r~djg>ntq,*5<-u8v.%{$+x!&;:4|0z7(_?w}#y)=" );
index = (word) (dot1 + dot2 * (word) 2 + dot3 * (word) 4
+ dot4 * (word) 8 + dot5 * (word) 16 + dot6 * (word) 32);
*code_ptr = code_table[index];
} /* assign_code */
void emboss_graph(FILE *out_file, word num_row, word num_col)
{ /* emboss_graph */
word row, col;
char code_char;
for (row = 0; row < num_row-2; row +=3)
{ /* for row */
for (col = 0; col < num_col-1; col += 2)
{ /* for col */
assign_code(graph[row][col], graph[row+1][col], graph[row+2][col],
graph[row][col+1], graph[row+1][col+1], graph[row+2][col+1], &code_char);
fprintf(out_file, "%c", code_char);
} /* for col */
fprintf(out_file, "\n");
} /* for row */
} /* emboss_graph */
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John A. Miller bldg Q 264H
E-mail: jamiller@qualcomm.com
Phone: (619) 658-3876
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