Preparing to add texture to quad

opengl-test-two/trimap.vertexshader

@@ -1,8 +1,13 @@
-#version 330 core
+#version 400
 
-layout(location = 0) in vec3 vertexPosition_modelspace;
+in vec2 aVertex;
+in vec2 aTexCoord;
 
-void main(){
-  gl_Position.xyz = vertexPosition_modelspace;
-  gl_Position.w = 1.0;
+out vec2 vTexCoord;
+out vec3 vNormal;
+
+void main()
+{
+    vTexCoord   = aTexCoord;
+    gl_Position = vec3(aVertex, 1);
 }