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The purpose of the program that I will present and explain in this module is to display a 3D surface using color (or shades of gray) to represent theelevation of each point on a 3D surface.


The constructor for this class receives a 3D surface defined as a rectangular 2D array of values of type double . Each double value represents a sample point on the 3D surface. The surface values may bepositive, negative, or both.

When an object of the class is constructed, it plots the 3D surface using one of six possible formats representing the elevation of each point on the surfacewith a color or a shade of gray.


The constructor requires four parameters:

  • double[][]dataIn
  • int blockSize
  • boolean axis
  • int display

The purpose of each parameter is as follows:


The parameter named dataIn is a reference to the 2D array of type double containing the data that describes the 3D surface.


The value of the parameter named blockSize defines the size of a colored square in the final display that represents a single input surfaceelevation value. For example, if blockSize is 1, each input surface value is represented by a single pixel in the display. If blockSize is 5, each input surface value is represented by a colored square having 5 pixels on each side (25 pixels in a square) .

The test code in the main method displays a surface having 59 values along the horizontal axis and 59 values along the vertical axis. Eachelevation value on the surface is represented in the final display by a colored square that is 2 pixels on each side.


The parameter named axis specifies whether optional red axes will be drawn on the display with the origin at the center as shown in Figure 1 .


The parameter named display specifies one of six possible display formats. The value of display must be between 0 and 5 inclusive.

Values of 0, 1, and 2 specify the following formats:

Display = 0

This value for the display parameter specifies a Grayscale plot with a smooth gradient from black at the minimum to white at the maximum.

Display = 1

This value for the display parameter specifies a Color Shift plot with a smooth gradient from blue at the low end through aqua, green, and yellow to redat the high end. The minimum elevation is colored black. The maximum elevation is colored white.

Display = 2

This value for the display parameter specifies a Color Contour plot. The surface is subdivided into 23 levels and each of the 23 levels is represented byone of the following colors in order from lowest to highest elevation:

  • Color.BLACK
  • Color.GRAY
  • Color.LIGHT_GRAY
  • Color.BLUE
  • new Color(100,100,255)
  • new Color(140,140,255)
  • new Color(175,175,255)
  • Color.CYAN
  • new Color(140,255,255)
  • Color.GREEN
  • new Color(140,255,140)
  • new Color(200,255,200)
  • Color.PINK
  • new Color(255,140,255)
  • Color.MAGENTA
  • new Color(255,0,140)
  • Color.RED
  • new Color(255,100,0)
  • Color.ORANGE
  • new Color(255,225,0)
  • Color.YELLOW
  • new Color(255,255,150)
  • Color.WHITE

Note that some of the colors in the above list refer to named color constants in the Color class. Others refer to new Color objects constructed by mixing the specified levels of red, green, and blue.

Questions & Answers

what is math number
Tric Reply
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
Need help solving this problem (2/7)^-2
Simone Reply
what is the coefficient of -4×
Mehri Reply
the operation * is x * y =x + y/ 1+(x × y) show if the operation is commutative if x × y is not equal to -1
Alfred Reply
An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Kala Reply
lim x to infinity e^1-e^-1/log(1+x)
given eccentricity and a point find the equiation
Moses Reply
12, 17, 22.... 25th term
Alexandra Reply
12, 17, 22.... 25th term
College algebra is really hard?
Shirleen Reply
Absolutely, for me. My problems with math started in First grade...involving a nun Sister Anastasia, bad vision, talking & getting expelled from Catholic school. When it comes to math I just can't focus and all I can hear is our family silverware banging and clanging on the pink Formica table.
I'm 13 and I understand it great
I am 1 year old but I can do it! 1+1=2 proof very hard for me though.
Not really they are just easy concepts which can be understood if you have great basics. I am 14 I understood them easily.
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
If f(x) = x-2 then, f(3) when 5f(x+1) 5((3-2)+1) 5(1+1) 5(2) 10
how do they get the third part x = (32)5/4
kinnecy Reply
make 5/4 into a mixed number, make that a decimal, and then multiply 32 by the decimal 5/4 turns out to be
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
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
Idrissa Reply
im all ears I need to learn
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salut. from Algeria
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
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
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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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