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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

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
how did you get the value of 2000N.What calculations are needed to arrive at it
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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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