Processing 1.0 - Processing Discourse - loading and image with an if statement

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Index › Programming Questions & Help › Syntax Questions › loading and image with an if statement

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loading and image with an if statement (Read 253 times)

hexidecimal

loading and image with an if statement
Mar 10^th, 2008, 8:00am

how do you load an image with an if statement.

I want to create a if statement that changes the image based on the arrow key I press.

code:

class fire {

PImage b;

void setup() {
b = loadImage("green_flame.jpg");
noLoop();
}

{

if (key == CODED) {
if (keyCode == UP) {

image(b, 0, 0);

} else if (keyCode == DOWN) {
fillVal = 0;
}
} else {
fillVal = 126;
}

}
}

main code:

color fillVal = color(126);

void draw() {
fill(fillVal);
rect(25, 25, 50, 50);
}

void keyPressed() {
fire thefire = new fire();
}

eskimoblood

Re: loading and image with an if statement
Reply #1 - Mar 10^th, 2008, 9:17am

First of all draw() is never been called if you use noLoop in the setup. Then you dont need a class for this, only a globale variable that holds your state:

Code:


Image b;
int state;
void setup() {
b = loadImage("green_flame.jpg");
state = 0;
}
 
void draw() {
noFill();
switch (state){
case 0: image(b, 0, 0); break;
case 1: fill(0); break;
case 2: fill(125); break;
}
rect(25, 25, 50, 50);
}
 
void keyPressed() {
 if (key == CODED) {
if (keyCode == UP) {
state = 0;
}else if (keyCode == DOWN) {
state=1;
} 
}
else {
state = 2;
  }
}

Andreas Köberle {eskimoblood}

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