view_li - cloud of lines visualisation
view_li [OPTIONS]
view_li visualises a cloud of lines in 3D. Data is taken from the standard input.
Various colouring options are available ( -0 , -x , -y , -z , -sl , -sf , -g , -b ).
A background triangle model can be visualised in parallel ( -t ), possibly with an image projected on the model ( -i , -c )
New data or files can be produced using keystrokes.
(use pt2li(1) to connect points and create a cloud of lines, use li2string(1) to format the input if coordinates and topology are separated)
INTEGER is the number of colours to use for visualisation (default: 256).
Option used together with -i and -t to project an image on a triangle file. FILE contains the projection matrix (3x4) of the image [see p_compute(1)].
Use a greyscale scalar map.
Returns the manual page.
Option used together with -c and -t to project an image on a triangle file. Project an image on the triangle file FILE.
Images output by keystrokes (see below) have a resolution INTEGER higher than the screen resolution.
INTEGER is the thickness of the lines in pixel (default: 3).
scalar values are associated with lines and not with the nodes of the lines (always together with option -sf).
FILE contains two (or one with option -sl) scalar value(s) for each line. The lines are colored according to the scalar value of their vertices (or uniform color with option -sl). By default colours are used. A greyscale output is possible using the -g option. Scalar values are automatically scaled to fit the full output range.
smooth output of triangle file.
invert the direction used by the scalar map.
visualise the lines on a background triangle file FILE.
triangle file is semi-trasparent.
Draw a set of axes at the origin. x is red, y is green and z is blue and the lines are 1 unit long.
toggle between wireframe and solid rendering (only when there is a triangle cloud in the background).
toggle between a light which follows the camera and a light fixed at the current position of the camera (only when there is a triangle cloud in the background).
toggle between parallel and central projection.
toggle between black and white background.
produce a tiff file (view_li.tif).
produce a jpeg file (view_li.jpg).
produce a vrml file (view_li.wrl).
set the viewing direction to ( 1, 0, 0).
set the viewing direction to (-1, 0, 0).
set the viewing direction to ( 0, 1, 0).
set the viewing direction to ( 0,-1, 0).
set the viewing direction to ( 0, 0, 1).
set the viewing direction to ( 0, 0,-1).
toggle visualisation mode between Red/Cyan (3D) and normal (colour or B&W).
return the coordinate of the focus point.
Written by Pierre Smars (first version: 2007).
Reports of bugs or problems should be submitted via electronic mail to <smars@yuntech.edu.tw>.
Copyright (C) 2017 Pierre Smars. License GPLv2 <http://www.gnu.org/licenses/gpl-2.0.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
view_pt(1), view_tri(1), pt2li(1), li2string(1)