Camera::WorldToScreen helper function

include/Engine/Rendering/Camera.h

@@ -2,6 +2,7 @@
 #define Camera_h__
 
 #include "../GLM.h"
+#include "../Core/Util/Rectangle.h"
 
 class Camera
 {
@@ -32,7 +33,6 @@ public:
 	glm::mat4 ViewMatrix() const { return m_ViewMatrix; }
     void SetViewMatrix(glm::mat4 val);
 
-
 	float AspectRatio() const { return m_AspectRatio; }
 	void SetAspectRatio(float val);
 
@@ -48,6 +48,8 @@ public:
     void UpdateViewMatrix();
     void UpdateProjectionMatrix();
 
+    glm::vec2 WorldToScreen(glm::vec3 worldCoord, Rectangle resolution);
+
 private:
 
 	glm::vec3 m_Position;

src/Engine/Rendering/Camera.cpp

@@ -79,6 +79,19 @@ void Camera::UpdateProjectionMatrix()
 	m_ProjectionMatrix = glm::perspective(m_FOV, m_AspectRatio, m_NearClip, m_FarClip);
 }
 
+glm::vec2 Camera::WorldToScreen(glm::vec3 worldCoord, Rectangle resolution)
+{
+    glm::vec4 screenCoord = m_ProjectionMatrix * m_ViewMatrix * glm::vec4(worldCoord, 1.f);
+    if (screenCoord.w != 0) {
+        screenCoord.x /= screenCoord.w;
+        screenCoord.y /= screenCoord.w;
+        screenCoord.z /= screenCoord.w;
+    }
+    screenCoord.x = screenCoord.x * (resolution.Width / 2.f);
+    screenCoord.y = screenCoord.y * (resolution.Height / 2.f);
+    return glm::vec2(screenCoord);
+}
+
 void Camera::UpdateViewMatrix()
 {
 	m_ViewMatrix = glm::toMat4(glm::inverse(m_Orientation))