Refactored functionality into separate files

objs/sphere.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <cuda_runtime.h>
+#include <cmath>
+
+#include "linalg/linalg.h"
+
+struct Sphere {
+    Vec3 center;
+    double radius;
+    Vec3 color;
+
+    __device__ bool intersect(const Vec3& rayOrigin, const Vec3& rayDir, double& t) const {
+        Vec3 oc = rayOrigin - center;
+        double b = oc.dot(rayDir);
+        double c = oc.dot(oc) - radius * radius;
+        double h = b * b - c;
+        if (h < 0.0) return false;
+        h = sqrt(h);
+        t = -b - h;
+        return true;
+    }
+};