QMORF(1)
NAME
qmorf - 3d morphing program
SYNOPSIS
qmorf [qfile1] [qfile2] ...
DESCRIPTION
qmorf reads in a series of Inventor quad mesh files and draws an animated
sequence which metamorphoses from one object to the next. These quad
mesh files must meet the exact specifications described below (40x40).
Qmorf is not related to other morphing programs (like the program used to
produce the effects in Michael Jackson's "Black or White" video). Those
programs use image warping techniques to modify 2D images; this program
actually modifies an object's 3D geometry.
qmorf was written using the Open Inventor 3d Toolkit. Currently, qmorf
is only able to interpolate between files that contain QuadMeshes with 40
by 40 vertices (1521 quads). Standard C++ code is used to linearly
interpolate the positions of the vertices of the intermediate geometry.
Open Inventor is used to linearly interpolate the objects' textures or
materials. The intermediate geometry is drawn twice, first with the
first set of materials or textures or materials applied. Then the object
is drawn again with the second set of materials or textures applied,
modified to be semi-transparent. Open Inventor (using OpenGL) blends the
semi-transparent object with the already drawn geometry. By varying the
level of transparency, a smooth fade from one object's texture to the
next is achieved. The background is derived from code originally written
by Drew Olbrich. It is a 21 by 21 QuadMesh (400 quads) with a different
material at each vertex. The positions of the vertices are determined by
a variety of mathematical functions (e.g. sine waves, exponential
functions, etc), while the colors are determined by a fractal noise
function. The positions and colors are edited each frame of the
animation , interpolating from one set of positions and colors to the
next. The total number of quads in any given frame is 3,442
(1552*2+400). The main window of the program is the standard Inventor
Examiner Viewer Xt component. The button and sliders are Motif widgets.
Textures are automatically turned off if too slow!
About button
Brings up a short summary about qmorf.
Quit button
Quits qmorf.
SOURCE CODE
Note that the source code to maze comes with the Open Inventor 3d
Toolkit.
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QMORF(1)
FILES
/usr/share/data/models/CyberHeads/* - Sample qmorf files
/usr/share/src/Inventor/demos/qmorf/* - Source to qmorf
CREDITS
Data for the heads courtesy of: Cyberware Laboratory Inc.
SEE ALSO
drop, maze, textomatic, revo, SceneViewer, inventor, ivview, noodle
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