1 files changed, 46 insertions, 0 deletions
diff --git a/src/engine/object.cpp b/src/engine/object.cpp
new file mode 100644
index 0000000..2e76b16
--- /dev/null
+++ b/src/engine/object.cpp
@@ -0,0 +1,46 @@
+#include "object.h"
+
+namespace Donut
+{
+    Ray::Ray(glm::vec3 o, glm::vec3 d) 
+        : m_origin(o), 
+          m_direction(glm::normalize(d)) { }
+
+    Material::Material(glm::vec3 c, float s, float e)
+        : m_color(c), 
+          m_specular(s), 
+          m_emission(e) { }
+
+    Object::Object(glm::vec3 c, float r, Material m) 
+        : m_centre(c), 
+          m_radius(r), 
+          m_material(m) { }
+
+    bool Object::intersect(Ray &ray, float &t)
+    {
+        glm::vec3 oc = ray.m_origin - m_centre;
+        float a = glm::dot(ray.m_direction, ray.m_direction); 
+        float b = 2.0f * glm::dot(oc, ray.m_direction);
+        float c = glm::dot(oc, oc) - m_radius * m_radius;
+        double discriminant = b*b - 4*a*c;
+
+        if(discriminant < 0)
+            return false;
+
+        float intercept = (-b - sqrt(discriminant)) / (2.0f*a);
+        if(intercept < 0)
+        {
+            intercept = (-b + sqrt(discriminant)) / (2.0f*a);
+            if(intercept<0)
+                return false;
+        }
+
+        t = intercept;
+        return true;
+    }
+
+    glm::vec3 Object::get_normal(glm::vec3 &point) const
+    {
+        return glm::normalize(point - m_centre);
+    }
+}