1. Lab1 Discussion
B. Ramamurthy

2. General Instructions
Attend the recitation (s), office hours (s) to get help
Read the Lab description
Understand what is needed.
Collect all the images you need before you start.
Design/plan before you start programming
Book tells you to write a pseudo code before program… pseudo code is the “plan”
Flowchart is another representation for the plan

3. Lets plan
Decide the permanent features and write the setup function + test it
Collect/draw/create the images of all the creatures you want on the African Savannah.
Write the functions for drawing the creatures on the Savannah
You need to place the creatures/animals
You need to how to generate and use random numbers
Use mouseX and mouseY and the functions appropriately
You need to know “if ..else” /selection statement

4. Placing Images
PImage pic; void setup() { size(400,400); pic = loadImage("tulips.jpg"); } void draw() { image(pic, 0,0,130,130);

5. Random function
“random” is a function in Processing that helps to get random numbers
random(high) ;
random(low, high);
randomSeed(0);
void draw()
{ int color = int(random(255));
stroke(r); line(i, 0, i, 100); }

6. Picture Background
PImage pic; void setup() { size(512,384); pic = loadImage("tulips.jpg"); } void draw() { background(pic);

7. Selection/choice .. If .else statement
if (expression) { statements } else Example: if (i < 35) { line(30, i, 80, i); } { line(20, i, 90, i); }

8. Lets try these out Lets try picture, background;
Review if..else and random: you will need it for this lab