((function smoothstep
   (signature float
     (parameters
       (declare (in) float edge0)
       (declare (in) float edge1)
       (declare (in) float x))
     ((declare () float t)
      (assign (x) (var_ref t)
              (expression float max
	                  (expression float min
	                              (expression float / (expression float - (var_ref x) (var_ref edge0)) (expression float - (var_ref edge1) (var_ref edge0)))
	                              (constant float (1.0)))
	                  (constant float (0.0))))
      (return (expression float * (var_ref t) (expression float * (var_ref t) (expression float - (constant float (3.0)) (expression float * (constant float (2.0)) (var_ref t))))))))
   (signature vec2
     (parameters
       (declare (in) float edge0)
       (declare (in) float edge1)
       (declare (in) vec2 x))
     ((declare () vec2 t)
      (assign (xy) (var_ref t)
              (expression vec2 max
	                  (expression vec2 min
	                              (expression vec2 / (expression vec2 - (var_ref x) (var_ref edge0)) (expression float - (var_ref edge1) (var_ref edge0)))
	                              (constant float (1.0)))
	                  (constant float (0.0))))
      (return (expression vec2 * (var_ref t) (expression vec2 * (var_ref t) (expression vec2 - (constant float (3.0)) (expression vec2 * (constant float (2.0)) (var_ref t))))))))

   (signature vec3
     (parameters
       (declare (in) float edge0)
       (declare (in) float edge1)
       (declare (in) vec3 x))
     ((declare () vec3 t)
      (assign (xyz) (var_ref t)
              (expression vec3 max
	                  (expression vec3 min
	                              (expression vec3 / (expression vec3 - (var_ref x) (var_ref edge0)) (expression float - (var_ref edge1) (var_ref edge0)))
	                              (constant float (1.0)))
	                  (constant float (0.0))))
      (return (expression vec3 * (var_ref t) (expression vec3 * (var_ref t) (expression vec3 - (constant float (3.0)) (expression vec3 * (constant float (2.0)) (var_ref t))))))))


   (signature vec4
     (parameters
       (declare (in) float edge0)
       (declare (in) float edge1)
       (declare (in) vec4 x))
     ((declare () vec4 t)
      (assign (xyzw) (var_ref t)
              (expression vec4 max
	                  (expression vec4 min
	                              (expression vec4 / (expression vec4 - (var_ref x) (var_ref edge0)) (expression float - (var_ref edge1) (var_ref edge0)))
	                              (constant float (1.0)))
	                  (constant float (0.0))))
      (return (expression vec4 * (var_ref t) (expression vec4 * (var_ref t) (expression vec4 - (constant float (3.0)) (expression vec4 * (constant float (2.0)) (var_ref t))))))))

   (signature vec2
     (parameters
       (declare (in) vec2 edge0)
       (declare (in) vec2 edge1)
       (declare (in) vec2 x))
     ((declare () vec2 t)
      (assign (xy) (var_ref t)
              (expression vec2 max
                          (expression vec2 min
                                      (expression vec2 / (expression vec2 - (var_ref x) (var_ref edge0)) (expression vec2 - (var_ref edge1) (var_ref edge0)))
                                      (constant float (1.0)))
                          (constant float (0.0))))
      (return (expression vec2 * (var_ref t) (expression vec2 * (var_ref t) (expression vec2 - (constant float (3.0)) (expression vec2 * (constant float (2.0)) (var_ref t))))))))

   (signature vec3
     (parameters
       (declare (in) vec3 edge0)
       (declare (in) vec3 edge1)
       (declare (in) vec3 x))
     ((declare () vec3 t)
      (assign (xyz) (var_ref t)
              (expression vec3 max
                          (expression vec3 min
                                      (expression vec3 / (expression vec3 - (var_ref x) (var_ref edge0)) (expression vec3 - (var_ref edge1) (var_ref edge0)))
                                      (constant float (1.0)))
                          (constant float (0.0))))
      (return (expression vec3 * (var_ref t) (expression vec3 * (var_ref t) (expression vec3 - (constant float (3.0)) (expression vec3 * (constant float (2.0)) (var_ref t))))))))

   (signature vec4
     (parameters
       (declare (in) vec4 edge0)
       (declare (in) vec4 edge1)
       (declare (in) vec4 x))
     ((declare () vec4 t)
      (assign (xyzw) (var_ref t)
              (expression vec4 max
                          (expression vec4 min
                                      (expression vec4 / (expression vec4 - (var_ref x) (var_ref edge0)) (expression vec4 - (var_ref edge1) (var_ref edge0)))
                                      (constant float (1.0)))
                          (constant float (0.0))))
      (return (expression vec4 * (var_ref t) (expression vec4 * (var_ref t) (expression vec4 - (constant float (3.0)) (expression vec4 * (constant float (2.0)) (var_ref t))))))))
))

