komentare k ps_graph

ps_graph.c

@@ -109,6 +109,7 @@ static void generate_grid(FILE *file, const struct graph_range *range) {
 
     }
 
+    /* popisky os */
     set_font(file, FONT, FONT_SIZE_LABEL);
     generate_text_align(file, -HALF_GRAPH_SIZE + Y_LABEL_OFFSET_X, Y_LABEL_OFFSET_Y, ALIGN_RIGHT, "y");
     generate_text_align(file, X_LABEL_OFFSET_X, -HALF_GRAPH_SIZE + X_LABEL_OFFSET_Y, ALIGN_CENTER, "x");
@@ -131,6 +132,7 @@ static void generate_function(FILE *file, const struct expr_node *node, const st
        
         x = range->xmin + (range->xmax - range->xmin) * (double)i / (double)FUNCTION_SEGMENTS;
 
+        /* funkce není definována */
         if (node_eval(node, x, &y) != EVAL_OK) {
             first = 1;
             continue;
@@ -155,8 +157,10 @@ static void generate_function(FILE *file, const struct expr_node *node, const st
 void ps_generate_graph(FILE *file, const struct expr_node *node, const struct graph_range *range, const char *function) {
     char buf[TEMP_BUF_SIZE];
     
+    /* posun na střed */
     fprintf(file, "%d %d translate\n", GRAPH_CENTER_X, GRAPH_CENTER_Y);
 
+    /* hlavička */
     if (function) {
         set_font(file, FONT, FONT_SIZE_HEADER);
         snprintf(buf, TEMP_BUF_SIZE, "y = %s", function);
@@ -165,6 +169,7 @@ void ps_generate_graph(FILE *file, const struct expr_node *node, const struct gr
 
     generate_grid(file, range);
 
+    /* ořezová oblast pro graf */
     fprintf(file,
         "[] 0 setdash\n"
         "newpath\n"
@@ -178,8 +183,10 @@ void ps_generate_graph(FILE *file, const struct expr_node *node, const struct gr
         -HALF_GRAPH_SIZE, -HALF_GRAPH_SIZE, GRAPH_SIZE, GRAPH_SIZE, -GRAPH_SIZE 
     );
 
+    /* samotný graf */
     generate_function(file, node, range);
 
+    /* rámeček */
     fprintf(file,
         "grestore\n"
         "2 setlinewidth\n"