Added Vulkan examples sources!

data/shaders/shadowmap/offscreen.frag

@@ -0,0 +1,16 @@
+#version 450
+
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+
+layout (location = 0) out float outFragColor;
+
+layout (location = 0) in vec4 inPos;
+layout (location = 1) in vec3 inLightPos;
+
+void main() 
+{
+	// Store distance to light as 32 bit float value
+    vec3 lightVec = inPos.xyz - inLightPos;
+    outFragColor = length(lightVec);
+}