New version of the samples and tutorials based on KHR_ray_tracing

ray_tracing__before/shaders/passthrough.vert

@@ -0,0 +1,15 @@
+#version 450
+layout (location = 0) out vec2 outUV;
+
+
+out gl_PerVertex
+{
+  vec4 gl_Position;
+};
+
+
+void main()
+{
+  outUV = vec2((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2);
+  gl_Position = vec4(outUV * 2.0f - 1.0f, 1.0f, 1.0f);
+}