Update on Overleaf.

handout/diagrams/diagramm_occlusion.tex

@@ -0,0 +1,62 @@
+\begin{tikzpicture}
+  
+    \def\raynum{60}
+
+    \foreach \x in {0,...,\raynum} {
+        \ifthenelse{\x < 10 \OR \x>50}
+        {
+            \draw[color = blue] (\x /\raynum * 6 ,0) -- (3,4);
+        }{
+            \draw[color = green] (\x /\raynum * 6 ,0) -- (3,4);
+ 
+        }
+    }
+
+    \fill[
+        white
+    ] (1.49,1) -- (4.51,1) -- (5.01,0) -- (0.99,0) -- cycle;
+
+
+    \draw [color=blue] (0,0) -- node[below]{wall} (6,0) ; % wall
+    \draw [color=green](1.5,1) -- node[below]{blocker} (4.5,1); %blocker
+
+    %cam
+    \node[
+        circle,
+        fill = black,
+        minimum width = 1mm,
+        outer sep = 2mm
+    ] (camera) at (3,4)  {};
+    \node at (camera.north) {camera};
+
+    %magnifier
+    \node[
+        circle,
+        draw
+    ] (mag) at (4.5, 1){};
+
+
+    \fill[
+        green
+    ] (7,2) -- (9,2) -- (9,1.7) -- (7,1.7) -- cycle; 
+
+    \draw[blue] (10,1) coordinate (blue_ray_isec) -- (7,4) coordinate (orig);
+    \draw[green] (8.7,2) coordinate (green_ray_isec) -- (7,4);
+
+    %line
+    \draw (mag.north east) -- (7,2);
+
+    %magnifier box
+    \draw (5,4) -- (10,4) -- (10,1) -- (5,1) -- cycle;
+
+    \pic [
+        draw, 
+        ->, 
+        "$d\omega$", 
+        angle radius=20mm,
+        angle eccentricity=1.1,
+        pic text options={shift={(3mm,3mm)}}
+        ]
+        {angle = green_ray_isec--orig--blue_ray_isec};
+
+\end{tikzpicture}