PDA

View Full Version : 3D Graphs: Good place to start?



hallikpapa
08-19-2010, 12:19 PM
I have been working through WebGL, and found some great tutorials on learningwebgl.com. They are good and slowly getting me up to speed, but I would like to explore creating a 3D scatter plot. I already some code to generate my matrix values with labels, etc. Here is a snippet of a matrix I generate using singular value decomposition:
http://en.wikipedia.org/wiki/Singular_value_decomposition



X Y Z
[ 1.82285955e-02 2.20609385e-02 -5.85005502e-03]
[ 3.64571909e-02 4.41218770e-02 -1.17001100e-02]
[ 1.59451969e-02 -2.45572177e-02 -1.56944686e-02]
[ 7.05088424e-03 1.22579963e-03 1.39319849e-01]
[ 1.86027297e-02 -2.86500873e-02 -1.83102133e-02]
[ 1.86027297e-02 -2.86500873e-02 -1.83102133e-02]
[ 1.16333275e-02 -1.69842343e-02 2.46107354e-02]
[ 2.49055400e-02 -2.00435916e-02 6.47591835e-03]


Each row in the matrix is an individual point I want to plot and label, and as you can see, it allows for negative values, so I may see data in 6 different quadrants. Any suggestions on how to start drawing a scatter plot graph like that and plotting the individual points?

Every example I see out there is about creating objects & shapes etc, but I am also interested in making a 3D graph that can be manipulated, pan, zoom, rotate, etc that cannot be done in most charting packages out there.

I figure I would need to draw a line on the X,Y,Z axis that intersects in the middle of the page, and make the min/max value on the tip of each line == to the min/max value of each corresponding column in my generated matrix. Finally plotting each row from the matrix within the grid.

Looking forward to any suggestions! :)

hallikpapa
08-19-2010, 03:30 PM
I found this link to the old O3D sample code from 3 months before it became WebGL. So much changes on the nightly builds I don't know if any of it will be relevant, or if they updated these samples anywhere.

http://codereview.appspot.com/979045/patch/1/69006