From 5f296ba39af5db20d7f2495ff2e9fe5a17dbf403 Mon Sep 17 00:00:00 2001
From: Tibo De Peuter <tibo.depeuter@ugent.be>
Date: Fri, 4 Oct 2024 21:07:10 +0200
Subject: [PATCH] feat: Iterate over objects to find first hit

Closes #2
---
 src/first_hit.cpp | 34 ++++++++++++++++++++++++----------
 1 file changed, 24 insertions(+), 10 deletions(-)

diff --git a/src/first_hit.cpp b/src/first_hit.cpp
index e7dd5ad..1858871 100644
--- a/src/first_hit.cpp
+++ b/src/first_hit.cpp
@@ -1,16 +1,30 @@
 #include "first_hit.h"
 
 bool first_hit(
-  const Ray & ray, 
-  const double min_t,
-  const std::vector< std::shared_ptr<Object> > & objects,
-  int & hit_id, 
-  double & t,
-  Eigen::Vector3d & n)
+    const Ray & ray,
+    const double min_t,
+    const std::vector< std::shared_ptr<Object> > & objects,
+    int & hit_id,
+    double & t,
+    Eigen::Vector3d & n)
 {
-  ////////////////////////////////////////////////////////////////////////////
-  // Replace with your code here:
-  return false;
-  ////////////////////////////////////////////////////////////////////////////
+    bool hit = false;
+    t = -1;
+
+    double t_temp;
+    Eigen::Vector3d n_temp;
+
+    for (int i = 0; i < objects.size(); ++i) {
+        if (objects[i]->intersect(ray, min_t, t_temp, n_temp)) {
+            hit = true;
+            if (t == -1 || t_temp < t) {
+                hit_id = i;
+                t = t_temp;
+                n = n_temp;
+            }
+        }
+    }
+
+    return hit;
 }