diff --git a/main.c b/main.c
index eac7fd5..908feb1 100644
--- a/main.c
+++ b/main.c
@@ -48,8 +48,8 @@ double cy = 0;
 int width, height;
 
 static void cursor_position_callback(GLFWwindow *window, double x, double y) {
-  cx = x / 1000.0;
-  cy = y / 1000.0;
+  cx = (x-width/2.0) / -1000.0;
+  cy = (y-height/2.0) / -1000.0;
   cy = (cy > M_PI / 2) ? M_PI / 2 : ((cy < -M_PI / 2) ? -M_PI / 2 : cy);
   return;
 }
@@ -114,7 +114,7 @@ int main(void) {
 
   glClearColor(0.2f, 0.5f, 0.7f, 1.0f);
   glEnable(GL_TEXTURE_2D);
-  glEnable(GL_DEPTH);
+  glEnable(GL_DEPTH_TEST);
 
   glfwSetKeyCallback(window, key_callback);
   glfwSetCursorPosCallback(window, cursor_position_callback);