camera: set atomic position at startup

this avoids the first few chunk update loops recognizing the camera as being positioned at (0,0,0), which in turns avoids wastefully generating chunks out of view at startup

include/camera.hpp

@@ -18,6 +18,10 @@ public:
 
 	// This matrix needs to be also updated in viewPortCallback whenever it is changed
         projection = glm::perspective(glm::radians(90.0f), 800.0f / 600.0f, 0.1f, 1200.0f);
+
+	posX = cameraPos.x;
+	posY = cameraPos.y;
+	posZ = cameraPos.z;
     }
 
     void update(GLFWwindow *window, float deltaTime)
@@ -112,7 +116,7 @@ public:
 
 
 private:
-    glm::vec3 cameraPos = glm::vec3(256.0, 80.0f, 256.0f);
+    glm::vec3 cameraPos = glm::vec3(512.0, 80.0f, 512.0f);
     glm::vec3 cameraFront = glm::vec3(0.0f, 0.0f, -1.0f);
     glm::vec3 cameraUp = glm::vec3(0.0f, 1.0f, 0.0f);
     glm::vec3 direction = glm::vec3(0.0f);