Colour switching using keys

ecain001

I'm trying to swap which array is being used to select the colour of the rectangle drawn.

Was looking for any advice on how to set up the void keyPressed section and how to apply to draw.

Thanks

int R; int G; int B; int C;

color[] Rarray = { color(250, 10, 100), color(225, 100, 100), color(200, 160, 145), color(250, 235, 25), color(225, 25, 195), color(200, 45, 105), color(250, 125, 125), color(225, 190, 75), color(200, 85, 155)};

color[] Garray = { color(100, 250, 10), color(100, 255, 100), color(145, 200, 160), color(25, 250, 165), color(95, 225, 25), color(105, 200, 45), color(125, 250, 125), color(75, 225, 190), color(155, 200, 85)};

color[] Barray = { color(100, 10, 250), color(100, 100, 225), color(145, 160, 200), color(25, 235, 250), color(195, 25, 225), color(105, 45, 200), color(125, 125, 250), color(75, 190, 225), color(155, 85, 200)};

void setup() { size(500,500); strokeWeight(0); background(0); }

void draw() {

R = Rarray[(int)random(0,8)]; G = Garray[(int)random(0,8)]; B = Barray[(int)random(0,8)];

if(mousePressed) { fill(C); drawRect(mouseX, mouseY, 5+(mouseY/8), 5+(mouseX/8)); }

//when mouse released black square formed to erase rectangles else { drawRect(mouseX, mouseY, 15+(mouseY/8), 15+(mouseX/8)); fill(0); } }

void drawRect(int RectX, int RectY, float RectWidth, float RectHeight) { rectMode(CENTER); rect(RectX, RectY, RectWidth, RectHeight); }

void keyPressed() {

if (key == 'r'); { int C = R; }

if (key == 'r'); { int C = G; }

if (key == 'r'); { int C = B; } }

Chrisir

please read the sticky post

on how to format code

go back edit your post

Then

in keyPressed : you each time ask for r ---- better ask for r then g then b

moreover, you have ; after the bracket )

this closes the if clause and stops the part in the brackets { } from working!!!

now in keyPressed set C = 1

C=2

and

C=3

in draw()

use if to evaluate C

basically if C==1 choose a var from RArray, if C==2 from GArray etc.

prince_polka

int R; int G; int B; int C; // fine

if(mousePressed) { fill(C); // fills with C from top row

if (key == 'r'); { int C = R; } // makes a new C and doesn't affect the orginial one

You probably know this and just forgot, but anyways ...
If you wan't to change the C on the top line in the keyPressed function, then you can't put int infront of it as then you'll create a local int C rather than changing your original global one.
You even get "The value of the local variable C is not used"-warning
Local meaning inside of brackets ** {** int C = R; }

int C = 5;
void setup(){
  ten();
  println(C); // 5
  twenty();
  println(C); // 20
}
void ten(){ int C=10; } // doesn't affect C ontop 
void twenty(){ C=20; } // changes C ontop  

Also, yes change the 'r' , 'r' , 'r' to 'r' , 'g' , 'b'

kfrajer

Please edit your post, select your code and hit ctrl+o to format your code. Make sure there is an empty line above and below your code.

Kf