added the readme

shaders/geometry.frag

@@ -0,0 +1,23 @@
+#version 330 core
+layout (location = 0) out vec3 gPosition;
+layout (location = 1) out vec3 gNormal;
+layout (location = 2) out vec4 gAlbedo;
+layout (location = 3) out vec4 gLightSpacePos;
+
+in vec3 FragPos;
+in vec3 Normal;
+in vec2 TexCoord;
+in vec4 FragPosLightSpace;
+
+uniform sampler2D tex;
+
+void main()
+{
+    vec4 albedo = texture(tex, TexCoord);
+    if (albedo.a < 0.1) discard;
+
+    gPosition      = FragPos;
+    gNormal        = normalize(Normal);
+    gAlbedo        = albedo;
+    gLightSpacePos = FragPosLightSpace;
+}