Shadows working but look dumb. The issue so far was that framebuffer.cpp interferes with the framebuffer used to create the shadow map.

33-shadow-mapping/shaders/33-depth.frag.glsl

@@ -0,0 +1,6 @@
+#version 330 core
+
+void main()
+{
+    // gl_FragDepth = gl_FragCoord.z;
+}