Add \mathit for Book1

Author: ymherklotz

books/RayTracingInOneWeekend.html

@@ -844,13 +844,13 @@
 
 <div class='together'>
 This `hittable` abstract class will have a hit function that takes in a ray. Most ray tracers have
-found it convenient to add a valid interval for hits $t_{min}$ to $t_{max}$, so the hit only
-“counts” if $t_{min} < t < t_{max}$. For the initial rays this is positive $t$, but as we will see,
-it can help some details in the code to have an interval $t_{min}$ to $t_{max}$. One design question
-is whether to do things like compute the normal if we hit something. We might end up hitting
-something closer as we do our search, and we will only need the normal of the closest thing. I will
-go with the simple solution and compute a bundle of stuff I will store in some structure. Here’s
-the abstract class:
+found it convenient to add a valid interval for hits $t_{\mathit{min}}$ to $t_{\mathit{max}}$, so
+the hit only “counts” if $t_{\mathit{min}} < t < t_{\mathit{max}}$. For the initial rays this is
+positive $t$, but as we will see, it can help some details in the code to have an interval
+$t_{\mathit{min}}$ to $t_{\mathit{max}}$. One design question is whether to do things like compute
+the normal if we hit something. We might end up hitting something closer as we do our search, and we
+will only need the normal of the closest thing. I will go with the simple solution and compute a
+bundle of stuff I will store in some structure. Here’s the abstract class:
 
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++
     #ifndef HITTABLE_H
@@ -1807,8 +1807,8 @@
 this is that almost all image viewers assume that the image is “gamma corrected”, meaning the 0 to 1
 values have some transform before being stored as a byte. There are many good reasons for that, but
 for our purposes we just need to be aware of it. To a first approximation, we can use “gamma 2”
-which means raising the color to the power $1/gamma$, or in our simple case ½, which is just
-square-root:
+which means raising the color to the power $1/\mathit{gamma}$, or in our simple case ½, which is
+just square-root:
 
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++
     void write_color(std::ostream &out, color pixel_color, int samples_per_pixel) {
@@ -2184,7 +2184,7 @@
 </div>
 
 Note we could just as well only scatter with some probability $p$ and have attenuation be
-$albedo/p$. Your choice.
+$\mathit{albedo}/p$. Your choice.
 
 If you read the code above carefully, you'll notice a small chance of mischief. If the random unit
 vector we generate is exactly opposite the normal vector, the two will sum to zero, which will