add implementations for geometry methods

src/Geometry.cc

@@ -0,0 +1,9 @@
+#include "Geometry.h"
+
+void Geometry::setTransform(const Matrix4f &transform) {
+  this->transform = transform;
+}
+
+bool Sphere::intersect() const { return false; }
+
+bool Rectangle::intersect() const { return false; }

src/Geometry.h

@@ -37,6 +37,8 @@ public:
       : Geometry(Type::SPHERE, ka, kd, ks, ca, cd, cs, pc), radius(radius),
         center(center) {}
 
+  bool intersect() const override;
+
 private:
   float radius;
   Vector3f center;
@@ -49,6 +51,8 @@ public:
       : Geometry(Type::RECTANGLE, ka, kd, ks, ca, cd, cs, pc),
         corners(corners) {}
 
+  bool intersect() const override;
+
 private:
   Matrix<float, 3, 4> corners;
 };