308 lines
7.9 KiB
Factor
308 lines
7.9 KiB
Factor
! Copyright (C) 2008 Jeff Bigot
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! See http://factorcode.org/license.txt for BSD license.
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USING: help.markup help.syntax ;
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IN: adsoda
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! --------------------------------------------------------------
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! faces
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! --------------------------------------------------------------
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ARTICLE: "face-page" "Face in ADSODA"
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"explanation of faces"
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$nl
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"link to functions" $nl
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"what is an halfspace" $nl
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"halfspace touching-corners adjacent-faces" $nl
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"touching-corners list of pointers to the corners which touch this face" $nl
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"adjacent-faces list of pointers to the faces which touch this face"
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{ $subsections
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face
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<face>
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}
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"test relative position"
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{ $subsections
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point-inside-or-on-face?
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point-inside-face?
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}
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"handling face"
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{ $subsections
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flip-face
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face-translate
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face-transform
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}
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;
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HELP: face
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{ $class-description "a face is defined by"
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{ $list "halfspace equation" }
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{ $list "list of touching corners" }
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{ $list "list of adjacent faces" }
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$nl
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"Touching corners and adjacent faces are defined by algorithm thanks to other faces of the solid"
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}
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;
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HELP: <face>
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{ $values { "v" "an halfspace equation" } { "tuple" "a face" } } ;
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HELP: flip-face
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{ $values { "face" "a face" } { "face" "flipped face" } }
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{ $description "change the orientation of a face" }
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;
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HELP: face-translate
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{ $values { "face" "a face" } { "v" "a vector" } }
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{ $description
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"translate a face following a vector"
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$nl
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"a translation of an halfspace doesn't change the normal vector. this word just compute the new constant term" }
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;
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HELP: face-transform
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{ $values { "face" "a face" } { "m" "a transformation matrix" } }
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{ $description "compute the transformation of a face using a transformation matrix" }
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;
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! --------------------------------
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! solid
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! --------------------------------------------------------------
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ARTICLE: "solid-page" "Solid in ADSODA"
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"explanation of solids"
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$nl
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"link to functions"
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{ $subsections
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solid
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<solid>
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}
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"test relative position"
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{ $subsections
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point-inside-solid?
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point-inside-or-on-solid?
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}
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"playing with faces and solids"
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{ $subsections
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add-face
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cut-solid
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slice-solid
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}
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"solid handling"
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{ $subsections
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solid-project
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solid-translate
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solid-transform
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subtract
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get-silhouette
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solid=
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}
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;
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HELP: solid
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{ $class-description "dimension" $nl "silhouettes" $nl "faces" $nl "corners" $nl "adjacencies-valid" $nl "color" $nl "name"
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}
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;
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HELP: add-face
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{ $values { "solid" "a solid" } { "face" "a face" } }
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{ $description "reshape a solid with a face. The face truncate the solid." } ;
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HELP: cut-solid
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{ $values { "solid" "a solid" } { "halfspace" "an halfspace" } }
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{ $description "like add-face but just with halfspace equation" } ;
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HELP: slice-solid
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{ $values { "solid" "a solid" } { "face" "a face" } { "solid1" "the outer part of the former solid" } { "solid2" "the inner part of the former solid" } }
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{ $description "cut a solid into two parts. The face acts like a knife"
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} ;
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HELP: solid-project
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{ $values { "lights" "lights" } { "ambient" "ambient" } { "solid" "solid" } { "solids" "projection of solid" } }
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{ $description "Project the solid using pv vector"
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$nl
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"TODO: explain how to use lights"
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} ;
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HELP: solid-translate
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{ $values { "solid" "a solid" } { "v" "translating vector" } }
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{ $description "Translate a solid using a vector"
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$nl
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"v and solid must have the same dimension "
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} ;
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HELP: solid-transform
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{ $values { "solid" "a solid" } { "m" "transformation matrix" } }
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{ $description "Transform a solid using a matrix"
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$nl
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"v and solid must have the same dimension "
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} ;
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HELP: subtract
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{ $values { "solid1" "initial shape" } { "solid2" "shape to remove" } { "solids" "resulting shape" } }
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{ $description "Substract solid2 from solid1" } ;
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! --------------------------------------------------------------
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! space
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! --------------------------------------------------------------
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ARTICLE: "space-page" "Space in ADSODA"
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"A space is a collection of solids and lights."
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$nl
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"link to functions"
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$nl
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"Defining words"
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{ $subsections
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space
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<space>
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suffix-solids
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suffix-lights
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clear-space-solids
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describe-space
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}
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"Handling space"
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{ $subsections
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space-ensure-solids
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eliminate-empty-solids
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space-transform
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space-translate
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remove-hidden-solids
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space-project
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}
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;
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HELP: space
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{ $class-description
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"dimension" $nl " solids" $nl " ambient-color" $nl "lights"
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}
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;
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HELP: suffix-solids
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"( space solid -- space )"
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{ $values { "space" "a space" } { "solid" "a solid to add" } }
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{ $description "Add solid to space definition" } ;
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HELP: suffix-lights
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"( space light -- space ) "
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{ $values { "space" "a space" } { "light" "a light to add" } }
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{ $description "Add a light to space definition" } ;
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HELP: clear-space-solids
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"( space -- space )"
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{ $values { "space" "a space" } }
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{ $description "remove all solids in space" } ;
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HELP: space-ensure-solids
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{ $values { "space" "a space" } }
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{ $description "rebuild corners of all solids in space" } ;
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HELP: space-transform
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{ $values { "space" "a space" } { "m" "a matrix" } }
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{ $description "Transform a space using a matrix" } ;
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HELP: space-translate
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{ $values { "space" "a space" } { "v" "a vector" } }
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{ $description "Translate a space following a vector" } ;
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HELP: describe-space
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{ $values { "space" "a space" } }
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{ $description "return a description of space" } ;
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HELP: space-project
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{ $values { "space" "a space" } { "i" "an integer" } }
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{ $description "Project a space along ith coordinate" } ;
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! --------------------------------------------------------------
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! 3D rendering
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! --------------------------------------------------------------
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ARTICLE: "3D-rendering-page" "The 3D rendering in ADSODA"
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"explanation of 3D rendering"
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$nl
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"link to functions"
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{ $subsections
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face->GL
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solid->GL
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space->GL
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}
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;
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HELP: face->GL
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{ $values { "face" "a face" } { "color" "3 3 values array" } }
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{ $description "display a face" } ;
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HELP: solid->GL
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{ $values { "solid" "a solid" } }
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{ $description "display a solid" } ;
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HELP: space->GL
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{ $values { "space" "a space" } }
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{ $description "display a space" } ;
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! --------------------------------------------------------------
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! light
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! --------------------------------------------------------------
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ARTICLE: "light-page" "Light in ADSODA"
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"explanation of light"
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$nl
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"link to functions"
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;
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ARTICLE: { "adsoda" "light" } "ADSODA : lights"
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{ $code """
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! HELP: light position color
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! <light> ( -- tuple ) light new ;
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! light est un vecteur avec 3 variables pour les couleurs\n
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void Light::Apply(Vector& normal, double &cRed, double &cGreen, double &cBlue)\n
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{ \n
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// Dot the light direction with the normalized normal of Face.
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register double intensity = -(normal * (*this));
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// Face is a backface, from light's perspective
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if (intensity < 0)
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return;
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// Add the intensity componentwise
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cRed += red * intensity;
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cGreen += green * intensity;
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cBlue += blue * intensity;
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// Clip to unit range
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if (cRed > 1.0) cRed = 1.0;
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if (cGreen > 1.0) cGreen = 1.0;
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if (cBlue > 1.0) cBlue = 1.0;
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""" }
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;
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ARTICLE: { "adsoda" "halfspace" } "ADSODA : halfspace"
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" defined by the concatenation of the normal vector and a constant"
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;
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ARTICLE: "adsoda-main-page" "ADSODA : Arbitrary-Dimensional Solid Object Display Algorithm"
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"multidimensional handler :"
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$nl
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"design a solid using face delimitations. Only works on convex shapes"
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$nl
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{ $emphasis "written in C++ by Greg Ferrar" }
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$nl
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"full explanation on adsoda page at " { $url "http://www.flowerfire.com/ADSODA/" }
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$nl
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"Useful words are describe on the following pages: "
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{ $subsections
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"face-page"
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"solid-page"
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"space-page"
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"light-page"
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"3D-rendering-page"
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} ;
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ABOUT: "adsoda-main-page"
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