Final updates for v4.0.1

RayTracing · Aug 31, 2024 · b6a3368 · b6a3368
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,16 +1,16 @@
 Change Log / Ray Tracing in One Weekend
 ====================================================================================================
 
-# v4.0.1 (in progress)
+# v4.0.1 (2024-08-31)
 
 ### Common
+  - Change -- Include hittable.h from material.h; drop `hit_record` forward declaration (#1609)
+  - Change -- Refactor sphere to use ray representation for animate center (#1621)
+  - Change -- All headers assume implicit rtweekend.h include (#1628)
   - Fix    -- Big improvement to print version listing font size (#1595) and more compact line
               height for code listings in both print and browser.
-  - Change -- Include hittable.h from material.h; drop `hit_record` forward declaration (#1609)
   - Fix    -- Slight improvement to `rotate_y::hit()` function (#1484)
   - Fix    -- Fixed possible bogus values from `random_unit_vector()` due to underflow (#1606)
-  - Change -- Refactor sphere to use ray representation for animate center (#1621)
-  - Change -- All headers assume implicit rtweekend.h include (#1628)
 
 ### In One Weekend
   - Fix    -- Fixed usage of the term "unit cube" for a cube of diameter two (#1555, #1603)
@@ -21,10 +21,10 @@ Change Log / Ray Tracing in One Weekend
 
 ### The Rest of Your Life
   - Fix    -- Fix typo of "arbitrary" (#1589)
-  - New    -- Added a bit more explanation of Buffon's needle problem (#1529)
   - Fix    -- Fix X-axis label for figure 3.08 (Approximating the nonuniform f()) (#1532)
   - Fix    -- Corrected scatter angle theta range in section 3.5.3 (The Scattering PDF) (#1331)
   - Fix    -- Clarify the distinction between average and expected value (#1535)
+  - New    -- Added a bit more explanation of Buffon's needle problem (#1529)
 
 
 ----------------------------------------------------------------------------------------------------

diff --git a/README.md b/README.md
@@ -11,7 +11,7 @@ Getting the Books
 The _Ray Tracing in One Weekend_ series of books are now available to the public for free directly
 from the web.
 
-### Version 4.0.0
+### Version 4.0.1
 
   - [Ray Tracing in One Weekend][web1]
   - [Ray Tracing: The Next Week][web2]
@@ -29,12 +29,12 @@ first**_.
 
 Project Status
 ---------------
-v4.0.0 has shipped! Three and a half years in the making, with massive changes to all three books
-and accompanying code.
+Version 4 has shipped! Three and a half years in the making, with massive changes to all three books
+and accompanying code. Our current version is v4.0.1.
 
 If you'd like to check out the latest updates and watch our progress, we're on the `dev-patch`,
-`dev-minor`, and `dev-major` branches. You can also browse our release backlog to see what we're
-planning.
+`dev-minor`, and `dev-major` branches. You can also browse our issues and milestones to see what
+we're planning.
 
 If you're interested in contributing, email us! You can find our contact info at the head of each
 book. Or just start [a new discussion][discussions] or [issue][issues].

diff --git a/books/RayTracingInOneWeekend.html b/books/RayTracingInOneWeekend.html
@@ -8,8 +8,7 @@
                                    **Ray Tracing in One Weekend**
                    [Peter Shirley][], [Trevor David Black][], [Steve Hollasch][]
                                                 <br>
-                                     Version 4.0.1, 20XX-XX-XX
-                                      **DRAFT IN DEVELOPMENT**
+                                     Version 4.0.1, 2024-08-31
                                                 <br>
                       Copyright 2018-2024 Peter Shirley. All rights reserved.
 
@@ -4391,8 +4390,8 @@
   - **Title (series)**: “Ray Tracing in One Weekend Series”
   - **Title (book)**: “Ray Tracing in One Weekend”
   - **Author**: Peter Shirley, Trevor David Black, Steve Hollasch
-  - **Version/Edition**: vXX.XX.XX
-  - **Date**: 20XX-XX-XX
+  - **Version/Edition**: v4.0.1
+  - **Date**: 2024-08-30
   - **URL (series)**: <https://raytracing.github.io/>
   - **URL (book)**: <https://raytracing.github.io/books/RayTracingInOneWeekend.html>
 
@@ -4413,13 +4412,13 @@
 
   ### LaTeX and BibTex
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-    ~\cite{Shirley20XXRTW1}
+    ~\cite{Shirley2024RTW1}
 
-    @misc{Shirley20XXRTW1,
+    @misc{Shirley2024RTW1,
        title = {Ray Tracing in One Weekend},
        author = {Peter Shirley, Trevor David Black, Steve Hollasch},
-       year = {20XX},
-       month = {XXXXXX},
+       year = {2024},
+       month = {August},
        note = {\small \texttt{https://raytracing.github.io/books/RayTracingInOneWeekend.html}},
        url = {https://raytracing.github.io/books/RayTracingInOneWeekend.html}
     }
@@ -4429,13 +4428,13 @@
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     \usepackage{biblatex}
 
-    ~\cite{Shirley20XXRTW1}
+    ~\cite{Shirley2024RTW1}
 
-    @online{Shirley20XXRTW1,
+    @online{Shirley2024RTW1,
        title = {Ray Tracing in One Weekend},
        author = {Peter Shirley, Trevor David Black, Steve Hollasch},
-       year = {20XX},
-       month = {XXXXXX},
+       year = {2024},
+       month = {August},
        url = {https://raytracing.github.io/books/RayTracingInOneWeekend.html}
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

diff --git a/books/RayTracingTheNextWeek.html b/books/RayTracingTheNextWeek.html
@@ -8,8 +8,7 @@
                                    **Ray Tracing: The Next Week**
                    [Peter Shirley][], [Trevor David Black][], [Steve Hollasch][]
                                                 <br>
-                                     Version 4.0.1, 20XX-XX-XX
-                                      **DRAFT IN DEVELOPMENT**
+                                     Version 4.0.1, 2024-08-31
                                                 <br>
                       Copyright 2018-2024 Peter Shirley. All rights reserved.
 
@@ -4297,8 +4296,8 @@
   - **Title (series)**: “Ray Tracing in One Weekend Series”
   - **Title (book)**: “Ray Tracing: The Next Week”
   - **Author**: Peter Shirley, Trevor David Black, Steve Hollasch
-  - **Version/Edition**: vXX.XX.XX
-  - **Date**: 20XX-XX-XX
+  - **Version/Edition**: v4.0.1
+  - **Date**: 2024-08-30
   - **URL (series)**: <https://raytracing.github.io/>
   - **URL (book)**: <https://raytracing.github.io/books/RayTracingTheNextWeek.html>
 
@@ -4319,13 +4318,13 @@
 
   ### LaTeX and BibTex
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-    ~\cite{Shirley20XXRTW2}
+    ~\cite{Shirley2024RTW2}
 
-    @misc{Shirley20XXRTW2,
+    @misc{Shirley2024RTW2,
        title = {Ray Tracing: The Next Week},
        author = {Peter Shirley, Trevor David Black, Steve Hollasch},
-       year = {20XX},
-       month = {XXXXXX},
+       year = {2024},
+       month = {August},
        note = {\small \texttt{https://raytracing.github.io/books/RayTracingTheNextWeek.html}},
        url = {https://raytracing.github.io/books/RayTracingTheNextWeek.html}
     }
@@ -4335,13 +4334,13 @@
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     \usepackage{biblatex}
 
-    ~\cite{Shirley20XXRTW2}
+    ~\cite{Shirley2024RTW2}
 
-    @online{Shirley20XXRTW2,
+    @online{Shirley2024RTW2,
        title = {Ray Tracing: The Next Week},
        author = {Peter Shirley, Trevor David Black, Steve Hollasch},
-       year = {20XX},
-       month = {XXXXXX},
+       year = {2024},
+       month = {August},
        url = {https://raytracing.github.io/books/RayTracingTheNextWeek.html}
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

diff --git a/books/RayTracingTheRestOfYourLife.html b/books/RayTracingTheRestOfYourLife.html
@@ -8,8 +8,7 @@
                                **Ray Tracing: The Rest of Your Life**
                    [Peter Shirley][], [Trevor David Black][], [Steve Hollasch][]
                                                 <br>
-                                     Version 4.0.1, 20XX-XX-XX
-                                      **DRAFT IN DEVELOPMENT**
+                                     Version 4.0.1, 2024-08-31
                                                 <br>
                       Copyright 2018-2024 Peter Shirley. All rights reserved.
 
@@ -4016,8 +4015,8 @@
   - **Title (series)**: “Ray Tracing in One Weekend Series”
   - **Title (book)**: “Ray Tracing: The Rest of Your Life”
   - **Author**: Peter Shirley, Trevor David Black, Steve Hollasch
-  - **Version/Edition**: vXX.XX.XX
-  - **Date**: 20XX-XX-XX
+  - **Version/Edition**: v4.0.1
+  - **Date**: 2024-08-30
   - **URL (series)**: <https://raytracing.github.io/>
   - **URL (book)**: <https://raytracing.github.io/books/RayTracingTheRestOfYourLife.html>
 
@@ -4038,13 +4037,13 @@
 
   ### LaTeX and BibTex
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-    ~\cite{Shirley20XXRTW3}
+    ~\cite{Shirley2024RTW3}
 
-    @misc{Shirley20XXRTW3,
+    @misc{Shirley2024RTW3,
        title = {Ray Tracing: The Rest of Your Life},
        author = {Peter Shirley, Trevor David Black, Steve Hollasch},
-       year = {20XX},
-       month = {XXXXXX},
+       year = {2024},
+       month = {August},
        note = {\small \texttt{https://raytracing.github.io/books/RayTracingTheRestOfYourLife.html}},
        url = {https://raytracing.github.io/books/RayTracingTheRestOfYourLife.html}
     }
@@ -4054,13 +4053,13 @@
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     \usepackage{biblatex}
 
-    ~\cite{Shirley20XXRTW3}
+    ~\cite{Shirley2024RTW3}
 
-    @online{Shirley20XXRTW3,
+    @online{Shirley2024RTW3,
        title = {Ray Tracing: The Rest of Your Life},
        author = {Peter Shirley, Trevor David Black, Steve Hollasch},
-       year = {20XX},
-       month = {XXXXXX},
+       year = {2024},
+       month = {August},
        url = {https://raytracing.github.io/books/RayTracingTheRestOfYourLife.html}
     }
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~