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2011-03-31-11-18 start
This file data3d2d.htm convert 3D
data to 2D data. Include coordinate
rotation, rotation definition come
from eye coordinate and up direction. 
Brief as 'eyeUp'. User input eyeUp
data, program rotate 3D data first
then convert to 2D data. This file
do not output after-rotation 3D data 
only output after-conversion 2D data.

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If you need after-rotation 3D data 
or need rotation matrix or rotation
angle and rotation axis vector or 
need quaternion, please go to 
Build 3D rotation matrix page //local 
http://freeman2.com/rotate3d.htm#matrixBox24 
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If 3D data already rotated in 
rotate3d.htm and need this file
data3d2d.htm convert to 2D data
(possible to draw on 2D screen)
to avoid rotate again, please set
eye xyz =(1,0,0) and
 up xyz =(0,0,1)
This set data create an identity
matrix as rotation matrix. It has 
same function as multiply by one 
in arithmetic. Rotate any vector 
to same vector. If click , 
program auto fill identity eyeUp 
data.

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This file data3d2d.htm is copied 
from Spherical coordinate builder
sphere3d.htm. freeman2.con site 
has three files convert 3D data 
to 2D data. Two are mentioned above.
Other one is Space Curve Projector
http://freeman2.com/curve3d2.htm 
Uploaded on 2009-01-03. Paste 3D 
data to Box1 in curve3d2.htm, 
click  output to 
Box2, next click  
Drawing board is few lines below.

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curve3d2.htm is earlier work, 
output x,y side by side data,
no x_array and y_array data.
Can not be used as XYGraph code.
Need program convert 
from x,y side by side data 
to x_array and y_array data
2011-03-31-11-53 stop

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2011-03-31-13-48 start
This file data3d2d.htm Box2 output 
x_array and y_array data, that is 
XYGraph command. Next pages draw 
x_array and y_array data (XYGraph 
code)
(domain name is http://freeman2.com/)
xygraph4.htm Box1 input click 
xygraphe.htm Box1 input click 
tute0054.htm Box3 input click 
The file
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http://freeman2.com/xygraphe.htm 
is designed to draw reader's graph
code and help reader to build his
own graph page. It is better for 
you to access xygraphe.htm 
In the page tute0054.htm find key
string "2011-02-27-16-30 start"
tell you the cause of possible 
error.

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This file data3d2d.htm Box3 output 
2D side by side data 
(not XYGraph graph code)
Next draw 2D side by side data 
(domain name is http://freeman2.com/)
xygraph2.htm Box1 input click 
                           or 
curve3d2.htm Box2 input click 
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Please pay attention to next
after graph xygraph2.htm Box1 
data become XYGraph code. But
this XYGraph is not xy side by 
side data. If click draw button
again, program show error message.
[[
Box 1 has text, not all data. Goodby. Please 
click [Box 1] line "1" button for sample data.
]]
xygraph2.htm build XYGraph code,
xygraph2.htm not draw XYGraph code.

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curve3d2.htm drawing board is below 
Box2.
curve3d2.htm has ten example buttons.
Click, for example "dumbbell" program
fill equation to equation input box
x(t),y(t),z(t) next click 
You can also click three buttons
to get middle data.
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2011-03-31-15-42 start
This file data3d2d.htm example button 
 are copied from //local
http://freeman2.com/tute0054.htm#Fig054QC
Click  to use same eyeUp data 
as that of tute0054.htm 
Output XYGraph graph code can draw
same graph used in tute0054.htm .
2011-03-31-15-56 stop