Update scanline status reporting

The current code leaves the "scanlines remaining" message up with a
count of one, and then prints "Done." on the next line. This change
prints "Done." over the scanlines remaining line, which looks neater.

Resolves #1045

Author: hollasch

books/RayTracingInOneWeekend.html

@@ -208,7 +208,7 @@
 
 
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++ highlight
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     [Listing [main-progress]: <kbd>[main.cc]</kbd> Main render loop with progress reporting]
 </div>
@@ -411,7 +411,7 @@
             }
         }
 
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     [Listing [ppm-2]: <kbd>[main.cc]</kbd> Final code for the first PPM image]
@@ -580,7 +580,7 @@
             }
         }
 
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     [Listing [main-blue-white-blend]: <kbd>[main.cc]</kbd> Rendering a blue-to-white gradient]
@@ -1291,7 +1291,7 @@
             }
         }
 
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     [Listing [main-with-rtweekend-h]: <kbd>[main.cc]</kbd> The new main with hittables]
@@ -1639,7 +1639,7 @@
             }
         }
 
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     [Listing [main-multi-sample]: <kbd>[main.cc]</kbd> Rendering with multi-sampled pixels]
@@ -1818,7 +1818,7 @@
             }
         }
 
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     [Listing [ray-color-depth]: <kbd>[main.cc]</kbd> ray_color() with depth limiting]
@@ -2402,7 +2402,7 @@
 
         ...
 
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     [Listing [scene-with-metal]: <kbd>[main.cc]</kbd> Scene with metal spheres]
@@ -2862,7 +2862,7 @@
                 }
             }
 
-            std::clog << "\nDone.\n";
+            std::clog << "\rDone.                 \n";
         }
 
       public:

books/RayTracingTheRestOfYourLife.html

@@ -356,7 +356,7 @@
                 }
             }
 
-            std::clog << "\nDone.\n";
+            std::clog << "\rDone.                 \n";
         }
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/InOneWeekend/scene.h

@@ -41,7 +41,7 @@ class scene {
             }
         }
 
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     }
 
   public:

src/TheNextWeek/scene.h

@@ -41,7 +41,7 @@ class scene {
             }
         }
 
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     }
 
   public:

src/TheRestOfYourLife/scene.h

@@ -42,7 +42,7 @@ class scene {
             }
         }
 
-        std::clog << "\nDone.\n";
+        std::clog << "\rDone.                 \n";
     }
 
   public: