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\documentclass{article}
\usepackage{axiom}
\begin{document}
\title{\$SPAD/src/algebra invrender.as}
\author{The Axiom Team}
\maketitle
\begin{abstract}
\end{abstract}
\eject
\tableofcontents
\eject
\section{RenderTools}
<<RenderTools>>=
#include "axiom"
POINT ==> Point DoubleFloat;
NNI ==> NonNegativeInteger;
SI ==> SingleInteger;
RenderTools: with {
renderToFile!: (FileName, ThreeSpace DoubleFloat) -> ();
makeSceneGraph: (ThreeSpace DoubleFloat) -> IVNodeObject;
} == add {
import from IVUtilities;
renderToFile!(f: FileName, space: ThreeSpace DoubleFloat): () == {
root := makeSceneGraph(space);
write!(f, root);
}
local makePts: (lpts: List POINT,
indicies: List List List NonNegativeInteger) ->
(List POINT, List DoubleFloat);
local makePts(lp: List POINT, indicies: List List List NonNegativeInteger):
(List POINT, List DoubleFloat) == {
local colorIdx: Integer;
indexList := concat concat indicies;
coordpts := lp;
if (# first lp = 4) then colorIdx := 4 else colorIdx := 3;
colors := [pt.colorIdx for pt in lp];
(coordpts, colors)
}
local makeBaseColor(l: List DoubleFloat): IVBaseColor == {
-- This works by interpolating between blue and green (via cyan).
-- There may well be better ways...
import from POINT;
import from List POINT;
import from DoubleFloat;
import from List DoubleFloat;
low := 10000.0;
high := -10000.0;
for df in l repeat {
if low > df then low := df;
if high < df then high := df;
}
if (high = low) then high := high + 1.0;
new [ point([0, (df - low)/(high - low), (high - df)/(high - low)])
for df in l]
}
makeSceneGraph(space: ThreeSpace DoubleFloat): IVNodeObject == {
import from List ThreeSpace DoubleFloat;
import from List List List NNI;
import from Integer;
import from Symbol;
import from IVValue;
check(space);
lpts := lp(space);
indicies := lllip(space);
root: IVSeparator := new();
(coordpts, colorvalues) := makePts(lpts, indicies);
coords: IVCoordinate3 := new coordpts;
colors: IVBaseColor := makeBaseColor(colorvalues);
addChild!(root, coerce coords);
addChild!(root, coerce colors);
binding: IVBasicNode := make "MaterialBinding";
addField!(binding, "value", symbol "PER__VERTEX");
addChild!(root, coerce binding);
offset: NNI := 0;
for ss in components space
for index in indicies repeat {
local coordIndex: List NNI;
default i: Integer;
closedCurve? ss => {
n: Integer := (#(index.1))::Integer;
coordIndex :=
[offset+coerce(i) for i in 0..n::Integer];
-- Close the curve
setlast!(coordIndex,offset);
curve : IVIndexedLineSet := new coordIndex;
addChild!(root, coerce curve);
offset := offset+n::NNI;
}
curve? ss => {
n := (#(index.1))::Integer;
coordIndex :=
[offset+coerce(i) for i in 0..(n-1)];
curve : IVIndexedLineSet := new coordIndex;
addChild!(root, coerce curve);
offset := offset+n::NNI;
}
polygon? ss => {
vertices := #(index.1) + #(index.2);
face : IVFaceSet := new(vertices::SI,offset::SI);
addChild!(root, coerce face);
offset := offset+vertices;
}
mesh? ss => {
xStep: SingleInteger := (#index)::SingleInteger;
yStep: SingleInteger := (#(first index))::SingleInteger;
quadMesh : IVQuadMesh :=
new(xStep,yStep,offset::SingleInteger);
addChild!(root, coerce quadMesh);
offset := offset+coerce(xStep*yStep);
}
point? ss => {
pt : IVPointSet := new(offset::SingleInteger,
1$SingleInteger);
addChild!(root, coerce pt);
offset := offset+1;
}
error "Unrecognised SubSpace component";
}
coerce root;
}
}
@
\section{License}
<<license>>=
--Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
--All rights reserved.
--
--Redistribution and use in source and binary forms, with or without
--modification, are permitted provided that the following conditions are
--met:
--
-- - Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- - Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- - Neither the name of The Numerical ALgorithms Group Ltd. nor the
-- names of its contributors may be used to endorse or promote products
-- derived from this software without specific prior written permission.
--
--THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
--IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
--TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
--PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
--OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
--EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
--PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
--PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
--LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
--NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
--SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@
<<*>>=
<<license>>
<<RenderTools>>
@
\eject
\begin{thebibliography}{99}
\bibitem{1} nothing
\end{thebibliography}
\end{document}
|
