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Supplemental material

I recommend that you also study the other lessons in my extensive collection of online programming tutorials. You will find a consolidated index at www.DickBaldwin.com .

General background information

I am going to take a very broad view of computer animation in this and the next few lessons. A program that causes visual images to change over time produces what I am referring to an animation.

Such visual changes can take on many different forms. Perhaps the most common form of animation is the movement (change in position) of an object over time. However, animation can involve a change in any visualattribute of an object over time, such as changes in position, color, size, opacity, orientation, etc.

A layman's view of the Flash Player

Major differences

There are some major differences between writing animation code in ActionScript and writing animation code in Java, C++, and C#.

Those differences generally have to do with the strong tie between the execution of ActionScript code and the Flash Player. (In some cases, references to the Flash Player in this lesson may also apply to Adobe Air.)

To understand how to write animation code in ActionScript, you must first understand a little about the Flash Player.

Why is it called a player?

There is a good reason that the Flash Player is referred to as a player . In many ways, it resembles a DVD player or a VCR player. What I mean by that isthat the Flash Player extracts a series of visual images from memory and displays those images sequentially with a (hopefully) fixed time interval between the display of one image and the display of the next image inthe sequence.

The scene is displayed once during each frame

We can't know exactly what happens at the lowest levels of the software and the display hardware. However, from the viewpoint of the ActionScript programmer,the scene described by the images stored in memory is displayed over and over even if it isn't changing.

According to the ActionScript 3.0 Bible, 2nd Edition, by Braunstein, ActionScript 3.0 uses a concept known as "dirty rectangles" to avoid physically rendering rectangular groups of pixels that haven't changed.

Frames

Each new display of the scene is referred to as a frame . As you will see later, it is possible for the ActionScript programmer to simply accept thedefault rate at which frames are displayed, or to execute code to set the frame rate to something other than the default rate.

Not the case in Java, C++, and C#

The inherently strong tie between the images stored in memory and the sequential and repetitive display of those images by the Flash Player does notexist in Java, C++, or C# (although it can be simulated ) .

There is an open-source programming environment named Processing that uses Java to create an architecture very similar to the Flash Player.The Microsoft XNA Game Studio (C#) and Game Creators Dark GDK (C++) also create a similar architecture. Note, however, that these are optional add-ons to the language, which is not the caseregarding ActionScript and the Flash Player.

Questions & Answers

show that the set of all natural number form semi group under the composition of addition
Nikhil Reply
what is the meaning
Dominic
explain and give four Example hyperbolic function
Lukman Reply
_3_2_1
felecia
⅗ ⅔½
felecia
_½+⅔-¾
felecia
The denominator of a certain fraction is 9 more than the numerator. If 6 is added to both terms of the fraction, the value of the fraction becomes 2/3. Find the original fraction. 2. The sum of the least and greatest of 3 consecutive integers is 60. What are the valu
SABAL Reply
1. x + 6 2 -------------- = _ x + 9 + 6 3 x + 6 3 ----------- x -- (cross multiply) x + 15 2 3(x + 6) = 2(x + 15) 3x + 18 = 2x + 30 (-2x from both) x + 18 = 30 (-18 from both) x = 12 Test: 12 + 6 18 2 -------------- = --- = --- 12 + 9 + 6 27 3
Pawel
2. (x) + (x + 2) = 60 2x + 2 = 60 2x = 58 x = 29 29, 30, & 31
Pawel
ok
Ifeanyi
on number 2 question How did you got 2x +2
Ifeanyi
combine like terms. x + x + 2 is same as 2x + 2
Pawel
x*x=2
felecia
2+2x=
felecia
×/×+9+6/1
Debbie
Q2 x+(x+2)+(x+4)=60 3x+6=60 3x+6-6=60-6 3x=54 3x/3=54/3 x=18 :. The numbers are 18,20 and 22
Naagmenkoma
Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 1 more than 3 times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 113?
mariel Reply
Mark = x,. Don = 3x + 1 x + 3x + 1 = 113 4x = 112, x = 28 Mark = 28, Don = 85, 28 + 85 = 113
Pawel
how do I set up the problem?
Harshika Reply
what is a solution set?
Harshika
find the subring of gaussian integers?
Rofiqul
hello, I am happy to help!
Shirley Reply
please can go further on polynomials quadratic
Abdullahi
hi mam
Mark
I need quadratic equation link to Alpa Beta
Abdullahi Reply
find the value of 2x=32
Felix Reply
divide by 2 on each side of the equal sign to solve for x
corri
X=16
Michael
Want to review on complex number 1.What are complex number 2.How to solve complex number problems.
Beyan
yes i wantt to review
Mark
16
Makan
x=16
Makan
use the y -intercept and slope to sketch the graph of the equation y=6x
Only Reply
how do we prove the quadratic formular
Seidu Reply
please help me prove quadratic formula
Darius
hello, if you have a question about Algebra 2. I may be able to help. I am an Algebra 2 Teacher
Shirley Reply
thank you help me with how to prove the quadratic equation
Seidu
may God blessed u for that. Please I want u to help me in sets.
Opoku
what is math number
Tric Reply
4
Trista
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
can you teacch how to solve that🙏
Mark
Solve for the first variable in one of the equations, then substitute the result into the other equation. Point For: (6111,4111,−411)(6111,4111,-411) Equation Form: x=6111,y=4111,z=−411x=6111,y=4111,z=-411
Brenna
(61/11,41/11,−4/11)
Brenna
x=61/11 y=41/11 z=−4/11 x=61/11 y=41/11 z=-4/11
Brenna
Need help solving this problem (2/7)^-2
Simone Reply
x+2y-z=7
Sidiki
what is the coefficient of -4×
Mehri Reply
-1
Shedrak
Nêu ứng dụng, tác hại của lực điện động
NTQ Reply
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
Shanjida
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
s.
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, 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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