Converted if-else for etai_over_etat to ternary command

Author: trevordblack

books/RayTracingInOneWeekend.html

@@ -2124,12 +2124,7 @@
                 const ray& r_in, const hit_record& rec, vec3& attenuation, ray& scattered
             ) const {
                 attenuation = vec3(1.0, 1.0, 1.0);
-                double etai_over_etat;
-                if (rec.front_face) {
-                    etai_over_etat = 1.0 / ref_idx;
-                } else {
-                    etai_over_etat = ref_idx;
-                }
+                double etai_over_etat = (rec.front_face) ? (1.0 / ref_idx) : (ref_idx);
 
                 vec3 unit_direction = unit_vector(r_in.direction());
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++ highlight
@@ -2195,12 +2190,7 @@
                 const ray& r_in, const hit_record& rec, vec3& attenuation, ray& scattered
             ) const {
                 attenuation = vec3(1.0, 1.0, 1.0);
-                double etai_over_etat;
-                if (rec.front_face) {
-                    etai_over_etat = 1.0 / ref_idx;
-                } else {
-                    etai_over_etat = ref_idx;
-                }
+                double etai_over_etat = (rec.front_face) ? (1.0 / ref_idx) : (ref_idx);
 
                 vec3 unit_direction = unit_vector(r_in.direction());
                 double cos_theta = ffmin(dot(-unit_direction, rec.normal), 1.0);

src/InOneWeekend/material.h

@@ -40,12 +40,7 @@ class dielectric : public material {
             const ray& r_in, const hit_record& rec, vec3& attenuation, ray& scattered
         ) const {
             attenuation = vec3(1.0, 1.0, 1.0);
-            double etai_over_etat;
-            if (rec.front_face) {
-                etai_over_etat = 1.0 / ref_idx;
-            } else {
-                etai_over_etat = ref_idx;
-            }
+            double etai_over_etat = (rec.front_face) ? (1.0 / ref_idx) : (ref_idx);
 
             vec3 unit_direction = unit_vector(r_in.direction());
             double cos_theta = ffmin(dot(-unit_direction, rec.normal), 1.0);

src/TheNextWeek/material.h

@@ -43,12 +43,7 @@ class dielectric : public material {
             const ray& r_in, const hit_record& rec, vec3& attenuation, ray& scattered
         ) const {
             attenuation = vec3(1.0, 1.0, 1.0);
-            double etai_over_etat;
-            if (rec.front_face) {
-                etai_over_etat = 1.0 / ref_idx;
-            } else {
-                etai_over_etat = ref_idx;
-            }
+            double etai_over_etat = (rec.front_face) ? (1.0 / ref_idx) : (ref_idx);
 
             vec3 unit_direction = unit_vector(r_in.direction());
             double cos_theta = ffmin(dot(-unit_direction, rec.normal), 1.0);

src/TheRestOfYourLife/material.h

@@ -64,12 +64,7 @@ class dielectric : public material {
             srec.is_specular = true;
             srec.pdf_ptr = 0;
             srec.attenuation = vec3(1.0, 1.0, 1.0);
-            double etai_over_etat;
-            if (rec.front_face) {
-                etai_over_etat = 1.0 / ref_idx;
-            } else {
-                etai_over_etat = ref_idx;
-            }
+            double etai_over_etat = (rec.front_face) ? (1.0 / ref_idx) : (ref_idx);
 
             vec3 unit_direction = unit_vector(r_in.direction());
             double cos_theta = ffmin(dot(-unit_direction, rec.normal), 1.0);