Have the original lighting system back and a little lightbulb model to show where the light is.

33-shadow-mapping/shaders/32-text.vert.glsl

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec4 vertex; // <vec2 pos, vec2 tex>
+out vec2 TexCoords;
+
+uniform mat4 projection;
+
+void main()
+{
+    gl_Position = projection * vec4(vertex.xy, 0.0, 1.0);
+    TexCoords = vertex.zw;
+}