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The GlLight module

open Gl
type color_material =
    [`emission|`ambient|`diffuse|`specular|`ambient_and_diffuse]

val color_material : face:face -> color_material -> unit
type fog_param = [
    `mode of [`linear|`exp|`exp2]
  | `density of float
  | `start of float
  | `End of float
  | `index of float
  | `color of rgba
]

val fog : fog_param -> unit
type light_param = [
    `ambient of rgba
  | `diffuse of rgba
  | `specular of rgba
  | `position of point4
  | `spot_direction of point3
  | `spot_exponent of float
  | `spot_cutoff of float
  | `constant_attenuation of float
  | `linear_attenuation of float
  | `quadratic_attenuation of float
]

val light : num:int -> light_param -> unit

val light_model : [`ambient of rgba|`local_viewer of float|`two_side of bool] -> unit
type material_param = [
    `ambient of rgba
  | `diffuse of rgba
  | `specular of rgba
  | `emission of rgba
  | `shininess of float
  | `ambient_and_diffuse of rgba
  | `color_indexes of (float * float * float)
]
val material : face:face -> material_param -> unit


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