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This method draws a yellow segmented lightening bolt four pixels thick (as shown in Figure 2) that is generally random but always ends up striking the top of the tree.

Long and tedious

As was the case earlier, this method is long and tedious but not technically difficult. Therefore, I will leave it as an exercise for the student to wadethrough the details in order to understand how it draws the lightening bolt.

The method named soundCompleteHandler

That brings us to the method shown in Listing 15 that is called each time a sizzle sound finishes playing.

The method named soundcompletehandler.

private function soundCompleteHandler(e:Event):void {//Allow another sizzle sound to be played now that // this one is finished.sizzlePlaying = false; //Play the thunder immediately following the end of// the sizzle sound. thunder.play();//Switch the background color from dark yellow// to the normal background color. redBkgnd = 0;greenBkgnd = 128; blueBkgnd = 128;//Erase the lightening bolt. Note that this will// also erase the yellow circle. canvasObj.graphics.clear();//Make the tree almost invisible. newTreeImage.alpha = 0.2;}//end soundCompleteHandler

Each time this method is called, it sets the sizzlePlaying variable to false to clear the way for the sizzle sound to be played again.

Then it plays the thunder sound and sets the color variables so that the background color will be restored to a dark cyan color by the code in Listing 7.

Finally it calls the clear method of the Graphics class to erase the lightening bolt, which also erases the moon as well.

Then it sets the alpha value on the tree image to a low value to make the tree appear to be lost in the fog.

The method named processChromaKey

That leaves only the method named processChromaKey that I haven't explained. The purpose of this method is to cause the blue backgroundpixels of the tree image shown in Figure 6 to become transparent.

The tree image.

Missing image
The tree image.

This method is essentially the same as a method that I explained in an earlier lesson titled Using Chroma Key Compositing to Create Transparent Backgrounds . Rather than to explain that method again, I will simply refer you to the earlier lesson for an explanation. You can view the method inits entirety in Listing 17.

Run the program

I encourage you to run this program from the web. Then copy the code from Listing 16 and Listing 17. Use that code tocreate your own project. Compile and run the project. Experiment with the code, making changes, and observing the results of your changes. Makecertain that you can explain why your changes behave as they do.

Resources

I will publish a list containing links to ActionScript resources as a separate document. Search for ActionScript Resources in theConnexions search box.

Complete program listings

Complete listings of the programs discussed in this lesson are provided below.

Code for main.mxml

<?xml version="1.0" encoding="utf-8"?><!-- Project LighteningStorm01See Driver.as for a description of this project. --><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"xmlns:cc="CustomClasses.*"><cc:Driver/></mx:Application>

Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
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
Abhi
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?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
hmm
Abhi
is it a question of log
Abhi
🤔.
Abhi
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
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+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
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
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
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
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
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
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
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
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
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, Object-oriented programming (oop) with actionscript. OpenStax CNX. Jun 04, 2010 Download for free at http://cnx.org/content/col11202/1.19
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