**From 3d To 3d**Hi to all,
i would like to know if i can create a 3d model of the face of a person
without using a 3D
scanner. Could i use a normal digital photo camera???
Thanks
Yeap you sure can,
Its called structure from motion, you need to take several
images from different angles, calculate the F matrix for
the camera parameters of each camera, detect features common
in all images (try harris corners) reproject the features
from the images or view frame into some common view frame,
triangulate the features (aka vertexes), taking into account
reprojection errors etc and your done.
Arash Partow
___...

**Moving a 3D Point**Hi.
I'm working on a 3D modeling application. I've succesfully implemented
loading, picking, arcball rotation, etc. I'm currently working on mesh
editing features. I've started out with the basic moving of a selected
vertex. However, I've been running into some problems. Using
glUnProject, I've been able to move it in XY space fine when I am
viewing the object head-on. But if I arc-rotate the view, I can see
that the Z-coordinate is always set to 1 even though I am getting the
depth of the vertex from the depth buffer.
What I would really appreciate is an example if any...

**moving sources in 3D**HI
I've two positions, one is nearer than the other in z. Both have
different x. Now how should I turn them together?
-----------
double theta = (double) heading * 3.14 / 180.0;
SourcesPos[i][0] = -float(cos(theta)); //not ok if i do: -0.2
SourcesPos[i][1] = -float(rand()%2);
SourcesPos[i][2] = -float(sin(theta)) //not ok if i do +0.7
---------
it's ok as long as i don't move one source away like +0.2 it gets
messed up. But i need to get one source more to the left and back but
moving sincronously.
Many thanks
Michael
...

**3D visulaisation of 3D matrix for a 3D CA**Hi,
I have a 3D matrix, of the form
{{{1, 2, 3, 4},
{5, 6, 7, 8},
{9, 10,11,12},
{13,14,15,16}},
{{17, 18, 19, 20},
{21, 22, 23, 24},
{25, 26, 27, 28},
{29, 30, 31, 32}}}
I want to plot this matrix, where every number is a unit cube, to give a
sort of 3D grid, where the number gives the colour. In reality most numbers
would be 0, which would be transparent.
I want to do this as I'm developing a 3D partitioned cellular automaton, and
have it defined over structures of this sort, and I want to be able to
visualise its development. In 2D I've used MatrixP...

**moving objects with mouse in 3D**I am rendering the model using
glMatrixMode(GL_MODELVIEW);
after detecting the click on object (select/pick) I want to move the
object according to the mouse movement
I use gluUnProject to unproject the mouse coordinates
Do I get a result as coordinates in local system ?
Thank you in advance
On Apr 10, 1:47=A0pm, "Yako...@gmail.com" <yako...@gmail.com> wrote:
> I am rendering the model using
> glMatrixMode(GL_MODELVIEW);
> after detecting the click on object (select/pick) I want to move the
> object according to the mouse movement
> I use gluUnProject to unproje...

**Simulation of moving 3D objects**Hi,
I was wondering how would I go about simulating a moving 3D
object.
For example a cube or cone moving along a certain
trajectory. Like a cone with apex in the x-y direction and
moving along y=x^2 or something like that
or even a cube if the cone is complex
Thanks!
Hatem Alismail wrote:
> I was wondering how would I go about simulating a moving 3D
> object.
> For example a cube or cone moving along a certain
> trajectory. Like a cone with apex in the x-y direction and
> moving along y=x^2 or something like that
Fix the axes bounds for the plot, or else when you m...

**3D tracking/match moving**This week I "discovered" match moving software "SynthEyes" and I downloaded
the free demo.
Didn't ran all the tests yet but seems to work very nice.
Very accurate too.
Next week I'm going to do some more tests with moving/spinning objects and
try some of my own video's.
For only $350,- this is really interesting. Take a look at:
http://www.ssontech.com/ or www.syntheyes.com
V.
"Vincent" <nospam@planet.nl> wrote in message news:<41953074$0$8638$ba620dc5@nova.planet.nl>...
> This week I "discovered" match moving software &quo...

**Move 3d object with wiimote..**Hi all..
I need some help in here. I'm trying to move 3d figure in matlab with my wiimote so it can roll and pitch. I'm using Wiilab (http://netscale.cse.nd.edu/twiki/bin/view/Edu/WiiMote). I success to move the 3d figure with a wiimote but it's not perfect. When wiimote's rolling 90 degree (or -90 degree) from starting position (wiimote at the table, pointing towards object at the screen), the object doesn't move as i expect. And it happens too if wiimote's pitch 90 degree (or -90 degree).
I put my script in here:
global wm;
addpath C:\'Program Files'\Wi...

**3D visulaisation of 3D matrix for a 3D CA #2**Hi,
I have a 3D matrix, of the form
{{{1, 2, 3, 4},
{5, 6, 7, 8},
{9, 10,11,12},
{13,14,15,16}},
{{17, 18, 19, 20},
{21, 22, 23, 24},
{25, 26, 27, 28},
{29, 30, 31, 32}}}
I want to plot this matrix, where every number is a unit cube, to give a sort of 3D grid, where the number gives the colour. In reality most numbers would be 0, which would be transparent.
I want to do this as I'm developing a 3D partitioned cellular automaton, and have it defined over structures of this sort, and I want to be able to visualise its development. In 2D I've used MatrixP...

**Moving inside the 3D space**Hi, everyone!
I'm learning to use 3D modellating in AutoCAD 2002, and would like to move
inside a 3D house.
Is there any command for walking inside the model, passing through the walls
(something like track or dooly tool present in other software packages, like
VIZ)?
I tried the command for setting the distance of the camera but, if I have a
wall in front of me, the visual keeps beeing obstructed by is (just like as
I were using the zoom tool, except for the perspective change).
Is here any way for doing what I need?
Thanx in advance.
--
Marco Iannaccone
FAKEcinemar...

**3D animation / moving camera**Hello,
I was trying to build a 3D animation like the well known "20th Century
Fox" clip. I have a 3D object and what I want to do is record a clip
that starts looking at the top of the object and then moves to the
front of it, while zooming out a little.
I was trying to do this in DAZ Bryce 5. However, it seems that only
objects themselves can be animated, but not the camera. Every time
that I move the camera (that is, the viewing angle), and then record a
key frame, the camera moves for all key frames and hence I get no
animation at all.
Does anyone have any advice o...

**Does move actually move?**If I remember correctly, when you move a file in msdos (ver 6.22) it copies
the file to the new dir and then deletes it. However, if you move a file in
W98/XP by using windows explorer, it doesn't really move it like old dos
would; the directory entry or FAT is simply updated. This is much safer,
faster, and doesn't fail if you don't have enough space for two copies at
the same time.
With XP, does moving a file at the command line with 4dos differ than moving
it with 4nt? I think 4dos copies/deletes and 4nt updates the FAT. Can anyone
verify this?
Anthony D&...

**3D Concept mapping / 3D Mind mapping with 3D Topicscape**An information-organization tool that lets you lay out information the way
you think, but without the limitations of 2D sheets. Then view in a
landscape that shows how the information is related. Can store files,
snippets of files (in a container it makes for you automatically) or
fileless notes, at every node or topic. Grabs web pages and saves them in a
background queue under the topic you select.
http://www.topicscape.com/
You can use 3D Topicscape for a free 60-day trial.
...

**plotting a moving picture on 3d axis**I want to plot ball.tif on a 3d axis which in every itteration the coordinates of its place are changed (e.g it starts in [0,0,0] goes to [0.1,0.1,0.1], [0.2,0.2,0.2] and so on until it stops in [1,1,1]). I tried the method which was described here http://www.mathworks.com/matlabcentral/newsreader/view_thread/277942 but it creates a new axis includes only the picture which can't move. How can I place my picture on a 3d axis and change its position?
...

**Moving Color channels for Mars 3D**Hello,
Maybe I'm going about this all wrong but...
I''m trying to generate 3D images using GIMP. I can use
Colors/filters/Compost to get NASA's R & L photos into the appropriate
red/cyan channels. I'd can't seem to move the channels themselves to
reposition the colors ie, move only the red channel. How can I move
the indificual color channels (not layers) using GIMP.
NASA has instructions that work in Photoshop but GIMP doesn't seem to
accept the Select/All Edit/Paste portion (hence,
Colors/Filters/Compose) and I can't move the color channels. Th...

**Moving origin/coordinate system in 3d.**Im using the pst-3dplot package to make fairly complicated 3d pictures.
There's an option in normal pstricks where you can move the origin of
the coordinate system you are drawing in eg. \pset{origin={2,5}}.
Is there something similar for use in 3d? I have already tried to use
this command with an extra coordinate, but it doesn't work.
I would like to be able to write something to the effect of:
\begin{pspicture}(-3,-3)(3,5)
\pstThreeDCoor [xMax=5,yMax=5,zMax=5,xMin=0,yMin=0,zMin=0,
nameX=$X$,nameY=$Y$,nameZ=$Z$]
\pstThreeDBox[origin={3,4,6},rotX=45](0,0,0)(2,0,0)(0,2...

**move in a 3D environment using the mouse**Hello folks!
I have created a 3D environment (really basic) with matlab and I need
to move inside it using the mouse.
Can anyone help me?
Francesco wrote:
>
>
> Hello folks!
>
> I have created a 3D environment (really basic) with matlab and I
> need
> to move inside it using the mouse.
>
> Can anyone help me?
did you trying clicking and dragging or any of the controls designed
for that purpose? if not, then i doubt if anyone could really help
you. if you did then tell us what you tried that doesn't work.
dave wrote:
>
>
> Francesco wrote:
>>...

**Move 3D Objects using handles**Hi all,
Im craeting a simple 3d app where one can create 3d primitives etc. now
what i wanna do is when a user selects a 3d model in the viewport and
requests for it to move, i want to show handles in each axis (x,y,z).
the handles are just straight lines created in objects view space. now
these handles are applied the same transformations as the object is
(objtrans * camtrans * perspective). now if the camera is far away the
objects appear small (as they should) and so do the handles.
Example transformation
objtrans = matrix.identity
camtrans = matrix.identity.move(0,15,-75)
Now i get the v...

**Moving 3d surf plot GUI**Hi everyone. I made a GUI which shows a 3d plot from a surf command in a axes object. I want to know if is possible to rotate 3d this plot as you will do with any surf plot made in MatLab frontdesk.
Thanks in advance,
Nicolas
"Nicolas" <odiseo1982@yahoo.com> wrote in message <gh6rbu$qmc$1@fred.mathworks.com>...
> Hi everyone. I made a GUI which shows a 3d plot from a surf command in a axes object. I want to know if is possible to rotate 3d this plot as you will do with any surf plot made in MatLab frontdesk.
>
> Thanks in advance,
>
> Nicolas
Well, I ...

**Translation/Moving of a Plane in 3D space**I have a set of 3D points out of which I have fitted a plane using Principal Component Analysis. Now, I want to generate/create a plane parallel to this one at a particular distance or passing through a point and find how these individual points project on that new plane.
Any help or input is appreciated.
The following code is an example.
-------------------
randn('state',0);
X = mvnrnd([0 0 0], [1 .2 .7; .2 1 0; .7 0 1],50);
plot3(X(:,1),X(:,2),X(:,3),'bo'); grid on;
maxlim = max(abs(X(:)))*1.1;
axis([-maxlim maxlim -maxlim maxlim -maxlim maxlim]);
axis square view(-23....

**In a 3D plot XaxisLocation fails to move.**Hi,
In a 3D plot I cannot change the postion of the xaxis ticks, or
ticklabels. For example:
>>mesh(magic(25));
>>set(gca,'XAxisLocation','top');
Fails to move the the axis, it stays on the bottom right of the plot.
Thanks in advance.
...

**Cannot move JSplitPane Divider with Canvas 3D**I hava a SplitPane with a Button at the left side and a Canvas 3D at
the right side and I can only move the divider to the button side.
When I want to make the Canvas3D smaller the divieder doesn't move in
that direction. Can anybody help me?
A problem to do with mixing heavyweight and lightweight.
Put the canvas in a JPanel, min and max sizes for the panel then add this
panel to the splitpane. See below
// In order to get the heavyweight Canvas3D to work correctly in a
JSplitPane
// we need to first put it in a JPanel and setMinimum and Maximum
sizes for that...

**Moving "elements" of a 3D model**Hello,
Prefix: I am very much new to 3d modelling and programming. I
appreciate that this maybe somewhat off topic.
I was wondering if anyone has recommendations as to an easy method of
moving elements of a 3D model. For example a rudder on a plane. I have
written my own 3ds file format parser and openGL renderer which works
for static models, so i could have a model of a plane, and then
individual models for each of the "moveable" elements.
Using this approach i believe that this would require that the axis of
rotation etc would need to be hardcoded into the source code for each
...

**Preventing 3d axes from moving when zooming or panning**Hi,
How do I prevent a 3d axes from moving when zooming or panning and
"axis equal" is on.
Thanks
...