Update json.cpp

Ayyyy we actually make it to the end of a glTF2 now.

src/json.cpp

@@ -109,15 +109,6 @@ namespace jjx::json {
             index++;
         }
 
-        /* If there's a decimal before a digit. Like ".006",
-         * it's presumed a zero should be before the decimal. */
-        if (raw_json[index] == '.') {
-            token.value += '0';
-            token.value += raw_json[index];
-            decimal_present = true;
-            index++;
-        }
-
         while(true) {
             if (index == raw_json.length())
                 break;
@@ -129,6 +120,18 @@ namespace jjx::json {
                 decimal_present = true;
                 token.value += c;
             }
+
+            // Scientific notation.
+            else if (c == 'E' || c == 'e') {
+                token.value += c;
+                index++;
+                if (raw_json[index] == '-') {
+                    token.value += raw_json[index];
+                    index++;
+                }
+                continue; // Loop early.
+            }
+
             // Only regex non-numeric values if we didn't catch it earlier.
             else if (!(c >= '0' && c <= '9'))
                 break;