Definition of the SCENE format: EBNF syntax

Notations:   keyword, <non terminal>,  "terminal"

Definition:

<scene>                       = <camera> + {<light>} + {<named material>} + {<object> }
<light>                         = <point light> | <sky light>
<point light>                = pointlight +<object position> + <intensity>+ end
<sky light>                   = sky +{intensity}+ end

<camera>                     = cmr  +"camera name" +<eye point>+ <view direction>+<up direction>+<focal distance>+<window>+[<time>]+ end
<window>                    = <width>+<height>+<centerx>+<centery>
<named material>         =  nmdMtrl +"material name"+ <reflector> | <emitter>+ end
<reflector>                    = lmbrtn +<diffuse/specular>+  spctrl +{<spectrum item>}+ end+ end
<diffuse/specular>         = spctrl +{<spectrum item>} + <kd> + <ks> + <shine> + [<transparency>]+ end
<emitter>                      = pLmnr + <reflector>+ spctrl + {<spectrum item>}+ end + end
<spectrum item>          = <wavelength>+<intensity>

<object>                     = [<object name>]+ plnrMsh +"meshname"+ [<object transform>]+ <material reference>+ <geometry>+ end
<object name>            = '[' name ']'
<object transform>      = [tessellate level] + [size objectsize] + [position <object position>]
<material reference>    = mtrlNm +"materialname"+ end
<geometry>                 = file +"filename"
<geometry>                 = <vertex list> + <polygon list>
<vertex list>                = vrtxPstn +{<poin>t}+ end
<polygon list>             = { plygn + <v1> + <v2> +< v3> + [<v4>]+ end }

<eye point>, <view direction>, <up direction>, <object position>, <point> = "double " "double"  "double"
<width>, <height>, <centerx>, <centery>,<focal distance>,<wavelength>, <intensity> = "double"
<v1>, <v2> ,< v3> ,<v4>: "int"