added Sphere collision but might be broken and is very messy

structs.h

@@ -1,9 +1,28 @@
 struct vec3 {
-    float x, y, z;
+    double x, y, z;
 };
 typedef struct vec3 vec3;
 
 struct triangle {
     vec3 a, b, c;
     vec3 normal;
-}; typedef struct triangle triangle;
+}; typedef struct triangle triangle;
+
+struct ray {
+    vec3 origin;
+    vec3 direction;
+}; typedef struct ray ray;
+
+struct sphere {
+    vec3 origin;
+    int radius;
+}; typedef struct sphere sphere;
+
+struct camera {
+    vec3 origin;
+    vec3 direction;
+    double height;
+    double width;
+    double resolutionX;
+    double resolutionY;
+}; typedef struct camera camera;