Scene description language
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A scene description language is any description language used to describe a scene to a 3D renderer, such as a ray tracer. The scene is written in a text editor (which may include syntax highlighting), as opposed to being modeled in a graphical way, but a 3D modelling program may allow for a scene to be exported to a specified scene description language.
Some scene description languages may include variables, constants, conditional statements, and while and for loops.
For example, 3DMLW and X3D are XML-based scene description languages; YafaRay also employs an XML-based language. Tao Presentations uses XL as a dynamic document description language. POV-Ray has its own Turing-complete language.
Examples[edit]
#declare the_angle = 0; #while (the_angle < 360) box { <-0.5, -0.5, -0.5> <0.5, 0.5, 0.5> texture { pigment { color Red } finish { specular 0.6 } normal { agate 0.25 scale 1/2 } } rotate the_angle } #declare the_angle = the_angle + 45; #end <?xml version="1.0" standalone="no"?> <document> <content2d> <area width="200" height="100" color="#C0C0C0FF" texture="flower.png" /> </content2d> <content3d id="content" camera="{#cam}"> <camera id="cam" class="cam_rotation" y="10" z="40" viewy="10"/> <box name="ground" width="100" height="2" depth="100" color="green" class="ground" /> <box name="dynamic" y="20" width="10" height="10" depth="10" color="blue" /> </content3d> </document> <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.2//EN" "http://www.web3d.org/specifications/x3d-3.2.dtd"> <X3D profile="Interchange" version="3.2" xmlns:xsd="http://www.w3.org/2001/XMLSchema-instance" xsd:noNamespaceSchemaLocation=" http://www.web3d.org/specifications/x3d-3.2.xsd "> <Scene> <Shape> <IndexedFaceSet coordIndex="0 1 2"> <Coordinate point="0 0 0 1 0 0 0.5 1 0"/> </IndexedFaceSet> </Shape> </Scene> </X3D> 
clear_color 0, 0, 0, 1 light 0 light_position 1000, 1000, 1000 draw_sphere with 1..50 rotatey 0.05 * mouse_x text_box 0, 0, 800, 600, extrude_depth 25 extrude_radius 5 align_center vertical_align_center font "Arial", 300 color "white" text "3D" line_break font_size 80 text zero hours & ":" & zero minutes & ":" & zero seconds draw_sphere N -> locally color_hsv 20 * N, 0.3, 1 translate 300*cos(N*0.1+time), 300*sin(N*0.17+time), 500*sin(N*0.23+time) sphere 50 zero N -> if N < 10 then "0" & text N else text N See also[edit]
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