Introduction to ProgrammingClass 10 and Quiz 1

Paul Brebner

What next?

• Revision quiz (at end)

• Chapter 7 Text Book

• Canon game extensions

• Next week Chapter 8 (Functions)

Chapter 7, Motion

• frameRate– Maximum, may be slower

• Ex 7.3 moving a shape– Uses float variables (decimal) for slow speed

– Whoops – where does it go?

• Ex 7.4 Wrap around– What happens when you reach the edge of the

screen?

– One option is wrapping around (pretend the left and right edges are connected).

Bounce

• Another option is to change the direction of the object

– Ex 7.5

– Uses a new variable, direction, to keep track of which way the object is facing

• Other options?

– Could scale (zoom) the screen size?

– Could move the screen so it follows the object?

Tweening, Random

• Tweening– Moving an object smoothly from one location to another– Inbetweening generates intermediate images to trick the

brain– Have a look at: Fantasmagorie (1908 film) on wikipedia– Ex 7.6

• Random– Motion in the real world is “idiosyncratic” (chaotic)– The random() function gives random values

• Ex 7.7, 7.8, 7.9• Results will be different each time program is run• If you want them the same, set the start seed value with

randomSeed() function

Circular

• Sine and Cosine functions (used in Canon game)

• http://en.wikipedia.org/wiki/Sine– Look at animation “Relation to the unit circle”

– Ex 7.12-7.15

• Summary– You can load examples from

• File -> Examples -> Books -> Getting Started -> Chapter07

– Try exercises 7.1-7.15• Excluding Timer (7.10)

Quiz 1

1 My name is:

2 Colossus, the 1st programmable computer, was 70 years old recently. Did it work with:

A Valves

B Transistors

C Relays

3 A typical Bank computer from the 1970’s was programmed using:

A Mind control

B Levers

C Punch cards

4 A typical home built computer from 1979 had how much RAM memory?

A 256 Bytes

B 1M Bytes

C 1G Bytes

5 Which of the following is NOT part of basic computer architecture?

A CPU

B Registers

C Taxi

D Bus

6 “Processing” is a high level graphics language: True or False

7 “Processing” runs on top of Java. In this case what does “Java” stand for?

A Indonesian Island

B Coffee

C A portable high level programming language.

8 In Processing, shapes drawn later are drawn over the top of earlier shapes – True

of False?

9 In the Processing RGB colour model, what colour does color(255, 0, 255) make?

A Orange

B Yellow

C Purple

10 Do all the following expressions produce the same answer? True of False

x = x + 1; x += 1; x++;

11 What does the following print out?

int number = 1;

while (number <= 10)

{

println(number);

if (number == 5)

println(“Once I caught a fish alive”);

else if (number == 10)

println(“Then I let it go again (etc)”);

number++;

}

12 Circle all the bugs you can find:

char numberr;

if (number < 10)

// {

println(“number”);

if (number == 5);

printl(Once I caught a fish alive)

elseif (number == 10)

println(Then I let it go again (etc));

number = 1;

}