From last time…• We talked about variables, random(), and casting!

• Please write a number from 1–5 on your proposal and turn it in!

! 1 – little/no prior programming experience!

! 5 – extensive prior programming experience

Office Hours

• http://www.cise.ufl.edu/class/cap3032sp14/!

• Joseph: CSE 410, Mon/Wed, before class!

• Yifan: CSE 309, Thurs, 2:00pm–3:00pm

CAP 3032

Quiz 1!Pixels, Processing, & Interaction

Stats• 38 students took the quiz!

• 91.3% average score!

• Just about 75% of the class was above average!

• Read my notes, answer key online

Pixel Grid Questions

Pg. 6

• The first grid row & column is 0!

• The upper left hand corner is the origin!

• The width & height are total, not “from center”

HSB Color Model

• Hue, Saturation, Brightness!

• The “non-default” color mode!

• HSV is close, but Processing won’t understand

CAP 3032

Conditionals I

Relational Operatorsboolean!! true or false!> greater than

< less than

>= greater than OR equal to

<= less than OR equal to

== equality

!= inequality

If

if (boolean expression) {

// do this if it’s true

}

If / Else

if (boolean expression) {

// do this if it’s true

} else {

// do this if it’s not true

}

If, Else If, Elseif (boolean expression A) {

// do this if A is true

} else if (boolean expression B) {

// do this if B is true

} else {

// do this if neither A nor B is true

}

== versus =

== ! ! Checks for equality!

x == 3

=! ! ! Assigns a value!

x = 3

Demo!Weighted Probabilities

constrain()• Takes three integer or float arguments!

• Returns an integer or float!

• constrain(amount, low, high);

• Great for color or size:!

! float redColor = constrain(290, 0, 255);

! redColor will be equal to 255

Logical Operators

&& AND if (x == 3 && y == 3) {}

|| OR if (x == 3 || x == 4) {}

! NOT if (x != 3) {}

if (!keyPressed) {}

if (keyPressed) {}

Demo!Collision Detection

For next time…

• I will return your proposals on Monday !

• Read Shiffman, p. 70–80 (Conditionals II)!

• Will hand out Homework 1 on Friday