raycasting diagram

.gitignore

@@ -12,3 +12,6 @@ presentation.run.xml
 presentation.snm
 presentation.synctex.gz
 presentation.toc
+
+
+presentation/build/

presentation/diagrams/diagramm_occlusion.tex

@@ -0,0 +1,40 @@
+\documentclass[margin=5mm, tikz]{standalone}
+\usepackage{tikz, ifthen, calc}
+
+\begin{document}
+
+\begin{tikzpicture}
+  
+    \def\raynum{120}
+
+    \foreach \x in {0,...,\raynum} {
+        \ifthenelse{\x < 20 \OR \x>100}
+        {
+            \draw[color = red] (\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=red] (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};
+
+
+\end{tikzpicture}
+
+\end{document}