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((function fwidth
(signature float
(parameters
(declare (in) float p))
((return (expression float +
(expression float abs (expression float dFdx (var_ref p)))
(expression float abs (expression float dFdy (var_ref p)))))))
(signature vec2
(parameters
(declare (in) vec2 p))
((return (expression vec2 +
(expression vec2 abs (expression vec2 dFdx (var_ref p)))
(expression vec2 abs (expression vec2 dFdy (var_ref p)))))))
(signature vec3
(parameters
(declare (in) vec3 p))
((return (expression vec3 +
(expression vec3 abs (expression vec3 dFdx (var_ref p)))
(expression vec3 abs (expression vec3 dFdy (var_ref p)))))))
(signature vec4
(parameters
(declare (in) vec4 p))
((return (expression vec4 +
(expression vec4 abs (expression vec4 dFdx (var_ref p)))
(expression vec4 abs (expression vec4 dFdy (var_ref p)))))))
))
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