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How do you use the class?

All that's necessary to use this class to plot your own 3D surfaces is to copy and compile the source code in Listing 29 near the end of this module. Then include a statement similar to the following in your program:

new ImgMod29(data,blockSize,true,0);

The 3D surface data to be plotted

The parameter named data in the above statement is a reference to a 2D array of type double that contains the sampled elevation values of the surface to be plotted.

The granularity of the plot

The second parameter named blockSize specifies the size of one side of a square array of colored pixels in the final plot that willrepresent each elevation point on your 3D surface. Set this to 0 if you are unsure as to what size square you need.

(If you look very carefully, you may be able to see a small white square at the center of the middle image in Figure 1 . This is a nine-pixel square produced by a blockSize value of 3.)

The optional axes

The third parameter specifies whether or not you want to have optional axes drawn on the plot. (See Figure 3 for examples of plots with and without the axes.) A parameter value of true causes the axes to be drawn. A value of false causes the axes to be omitted.

The plotting format

The fourth parameter is an integer that specifies the plotting format as follows:

  • 0 - Grayscale (linear, top-left image in Figure 2 )
  • 1 - Color Shift (linear, top-center image in Figure 2 )
  • 2 - Color Contour (linear, top-right image in Figure 2 )
  • 3 - Grayscale with logarithmic data conversion (bottom-left image in Figure 2 )
  • 4 - Color Shift with logarithmic data conversion (bottom-center image in Figure 2 )
  • 5 - Color Contour with logarithmic data conversion (bottom-right image in Figure 2 )

If you are unsure as to which format would be best for your application, just start with a value of 0. Then try all six formats to see which one worksbest for you.

Extremely simple to use

The class couldn't be simpler to use.

(Your three-minute learning curve has expired. You now know how to use the class to incorporate 3D surface plotting in your Java programs.)

Will use in subsequent modules

This 3D plotting class will be used in numerous future modules involving such complex topics as the use of the 2D Fourier Transform to process images.

If you arrived at this page seeking a free Java program for plotting your 3D surfaces, you are in luck. Just copy the source code for the class in Listing 29 and feel free to use it as described above.

On the other hand, if you would like to learn how the class does what it does, and perhaps use your programming skills to improve it, keep reading.Hopefully, once you have finished the module, you will have learned quite a lot about plotting 3D surfaces using color in Java.

Viewing tip

I recommend that you open another copy of this module in a separate browser window and use the following links to easily find and view the Figuresand Listings while you are reading about them.


  • Figure 1 . 3D views of a wave-number spectrum.
  • Figure 2 . Sample output with logarithmic flattening.
  • Figure 3 . Program output in self-test mode.

Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
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I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
is it a question of log
I rally confuse this number And equations too I need exactly help
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Commplementary angles
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im all ears I need to learn
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what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
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Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
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Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Digital signal processing - dsp. OpenStax CNX. Jan 06, 2016 Download for free at https://legacy.cnx.org/content/col11642/1.38
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