Added gl_PerVertex outputs

data/shaders/shadowmapping/offscreen.vert

@@ -10,6 +10,12 @@ layout (binding = 0) uniform UBO
 	mat4 depthMVP;
 } ubo;
 
+out gl_PerVertex 
+{
+    vec4 gl_Position;   
+};
+
+ 
 void main()
 {
 	gl_Position =  ubo.depthMVP * vec4(inPos, 1.0);

data/shaders/shadowmapping/quad.vert

@@ -14,6 +14,12 @@ layout (binding = 0) uniform UBO
 
 layout (location = 0) out vec2 outUV;
 
+out gl_PerVertex 
+{
+    vec4 gl_Position;   
+};
+
+
 void main() 
 {
 	outUV = inUV;

data/shaders/shadowmapping/scene.vert

@@ -23,6 +23,10 @@ layout (location = 2) out vec3 outViewVec;
 layout (location = 3) out vec3 outLightVec;
 layout (location = 4) out vec4 outShadowCoord;
 
+out gl_PerVertex 
+{
+    vec4 gl_Position;   
+};
 
 const mat4 biasMat = mat4( 
 	0.5, 0.0, 0.0, 0.0,

data/shaders/skeletalanimation/mesh.vert

@@ -27,6 +27,11 @@ layout (location = 2) out vec2 outUV;
 layout (location = 3) out vec3 outViewVec;
 layout (location = 4) out vec3 outLightVec;
 
+out gl_PerVertex 
+{
+    vec4 gl_Position;   
+};
+
 void main() 
 {
     mat4 boneTransform = ubo.bones[inBoneIDs[0]] * inBoneWeights[0];

data/shaders/skeletalanimation/texture.vert

@@ -21,6 +21,11 @@ layout (location = 1) out vec3 outNormal;
 layout (location = 2) out vec3 outViewVec;
 layout (location = 3) out vec3 outLightVec;
 
+out gl_PerVertex 
+{
+    vec4 gl_Position;   
+};
+
 void main() 
 {
 	outUV = inUV * 2.0 + ubo.uvOffset;