diff --git a/engine/include/frustsum.hpp b/engine/include/frustsum.hpp
index 48575d9..37b4c13 100644
--- a/engine/include/frustsum.hpp
+++ b/engine/include/frustsum.hpp
@@ -12,7 +12,6 @@ struct Plane {
     
     glm::vec3 point = { 0.f, 0.f, 0.f };
     glm::vec3 normal = { 0.f, 1.f, 0.f };
-    glm::vec4 abcd = { 0.f, 0.f, 0.f, 0.f };
 
     Plane() = default;
     Plane(const Plane& other) = default;
@@ -20,7 +19,7 @@ struct Plane {
 
     // rethink distance to point
     float distanceToPoint(const glm::vec3& point) const {
-        return abcd.x * point.x + abcd.y * point.y + abcd.z * point.z + abcd.w;
+        return glm::dot(normal, point - this->point);
     }
     
 
diff --git a/engine/src/frustsum.cpp b/engine/src/frustsum.cpp
index 5093579..9b32bae 100644
--- a/engine/src/frustsum.cpp
+++ b/engine/src/frustsum.cpp
@@ -6,9 +6,6 @@
 Plane::Plane(const glm::vec3& normal, glm::vec3 point) {
     this->normal = glm::normalize(normal);
     this->point = point;
-    float d = -normal.x * point.x - normal.y * point.y - normal.z * point.z;   
-
-    this->abcd = glm::vec4(this->normal, d);
 }